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Badass is no longer a trope.
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* ''VideoGame/HeroesOfMightAndMagic III'' features [[spoiler:Deyja using dark magic to revive the dead King Gryphonheart as a lich to serve them. Turns out that the late King, even as a lich, is too BadAss for their liking, forcing them to [[EnemyMine forge a temporary alliance with Erathia]].]]
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* ''VideoGame/HeroesOfMightAndMagic III'' features [[spoiler:Deyja using dark magic to revive the dead King Gryphonheart as a lich to serve them. Turns out that the late King, even as a lich, is too BadAss badass for their liking, forcing them to [[EnemyMine forge a temporary alliance with Erathia]].]]
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** This also makes the Jester a target for Mafia and Neutral Killing as being an apparent Investigator and trusted by the town are among the top two priorities in choosing the next target.
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** This also What makes the Jester a target for Mafia and Neutral Killing as it ''even harder'' is that being an apparent Investigator and trusted by the town are among the top two priorities in choosing when the Mafia and Neutral Killing roles choose the next target.
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** This also makes the Jester a target for Mafia and Neutral Killing (being an apparent Investigator and trusted by the town are among the top two priorities) making them getting lynched as they were supposed to do near ''impossible''.
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** This also makes the Jester a target for Mafia and Neutral Killing (being as being an apparent Investigator and trusted by the town are among the top two priorities) making them getting lynched as they were supposed to do near ''impossible''.priorities in choosing the next target.
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** This also makes the Jester a target for Mafia and Neutral Killing (being an apparent Investigator and trusted by the town are among the top two priorities) making them getting lynched as they were supposed to do near ''impossible''.
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** In ''VideoGame/FinalFantasyX2'' we find out that Vegnagun was built by Bevelle during the war against Zanarkand, and was intended to be an unstoppable superweapon. They overdid the "unstoppable" and were too scared to activate it, so instead they [[SealedEvilInACan buried it under the city]] and spent the next thousand years hoping nobody would switch it on by accident. Also, it was programed to automatically activated when someone planned to attack and stop the attack before it happened. It worked too well and now it could be activated by someone simply thinking about destroying it.
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** In ''VideoGame/FinalFantasyX2'' we find out that Vegnagun was built by Bevelle during the war against Zanarkand, and was intended to be an unstoppable superweapon. They overdid the "unstoppable" and were too scared to activate it, so instead they [[SealedEvilInACan buried it under the city]] and spent the next thousand years hoping nobody would switch it on by accident. Also, it was programed to automatically activated activate when someone planned to attack and stop the attack before it happened. It worked too well and now it could be activated by someone simply thinking ''thinking'' about destroying it.
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** One of the mages of the College of Winterhold wants to actually try to recreate the magical event which caused the [[OurDwarvesAreDifferent Dwemer]] to all vanish from the face of Nirn. You follow a questline where you run around collecting the items he needs, he tries the experiment, and... he zaps himself out of existence. [[TooDumbToLive Uh, success?]] Thankfully, nobody else gets zapped along with him. In fact, the aforementioned event with the Dwemer would also qualify in the wider lore: basically, they came to the conclusion that reality is just fake bullshit, so they tried to break themselves down into the base elements and then [[AscendToAHigherPlaneOfExistence reforge themselves as ascended immortal beings]], and they either got the reforging process wrong or experienced this trope. Magic is not a toy, people.
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** Most of the Vaults -- which were ''not'' underground bunkers designed to protect the citizenry but instead mass-scale experiments designed to evaluate their suitability for post-war survival and possibly space-travel on generation interstellar ships (read: torture them sadistically in a variety of psychological and physiological ways) have, by the time the player character stumbles upon them, have either GoneHorriblyWrong or have Gone Horribly Right instead. In either case, the result usually sees the player character find a ''lot'' of skeletal corpses lying around.
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** Most of the Vaults -- which were ''not'' underground bunkers designed to protect the citizenry but instead mass-scale experiments designed to evaluate their suitability for post-war survival and possibly space-travel on generation interstellar ships (read: torture them sadistically in a variety of psychological and physiological ways) have, by the time the player character stumbles upon them, have either GoneHorriblyWrong or have Gone Horribly Right instead. In either case, the result usually sees the player character find a ''lot'' of skeletal corpses lying around.[[note]]It should be noted that, in an inversion of this trope, those experiments were carried away on the basis that "every single American civilian would want to be part of the Vaults to shelter themselves from an atomic tidal wave washing over the planet", cashing in the countrywide paranoia spread by the media. Standard fare, sure, but every Vault Tec CEO also believed that the news were blowing things out of proportion to press the war agenda on the masses, thus ensuring an much-needed influx of recruits and soldiers, and that nuclear warfare wouldn't be used despise looking like the likely scenario, exactly because of the SaltTheEarth implications, which are counterproductive to any war efforts. [[{{Understatement}} Boy were they wrong about that!]][[/note]]
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** ''VideoGame/FinalFantasyXIV'' recounts the story of the Warriors of Darkness: [[spoiler:They were adventurers-turned champions of the light, very much the same as the player character. They fought against the darkness in the service of the light for ages, and eventually reached the point where they banished the last servant of darkness from their world forever. In doing so, they allowed in an unnatural, unopposed, blinding Light. A light which threatened to burn away everything in its path - all color and definition and life - until nothing remained but a void of "blank perfection"]]. Suffice it to say that the Warriors of Darkness were ''not'' happy to see this happen after they had done, by their reckoning, everything ''right''.
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* In ''BatenKaitos Origins'', we have [[spoiler:Sagi]], who was one of the subjects for [[spoiler:[[BigBad Baelheit]]'s experiment to make [[PersonOfMassDestruction aritificial spiriters]] by bonding pieces of Malpercio to human hearts]].
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* In ''BatenKaitos Origins'', ''VideoGame/BatenKaitosOrigins'', we have [[spoiler:Sagi]], who was one of the subjects for [[spoiler:[[BigBad Baelheit]]'s experiment to make [[PersonOfMassDestruction aritificial spiriters]] by bonding pieces of Malpercio to human hearts]].
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** Arguably Garrosh Hellscream. Thrall felt he was too diplomatic a leader and the Orcs were losing touch with their [[ProudWarriorRaceGuy roots]], so he appointed Garrosh as Warchief. Garrosh would go on to declare war against ''everyone'' in an attempt to either conquer Azeroth or start a ForeverWar[[note]]While Garrosh insists that Orcs have a right to all of Azeroth, he also believes the only good death for ''any'' orc is "bloody and thrashing on the battlefield".[[/note]]
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Repair don't respond (also, not really relavent to the trope).
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* The Forerunners in the ''Franchise/{{Halo}}'' series:
** This happened during the Human-Forerunner war prior to the Halos being created. While incredibly advanced, the prehistoric humans couldn't match the Forerunner war machine. The Forerunners utterly crushed the Human Empire and literally bombed humanity back to the Stone Age. ''Then'' they realized that the humans were all that stood between the Flood and the Forerunners, and that they had disbanded their military after defeating the humans...
*** [[spoiler: This, arguably, had as much to do with the fact that Humanity was fighting a two-front war while the Forerunners weren't as it does any inherent technological superiority. Coupled with the knowledge that Humanity nearly beat the Flood before falling to the Forerunners, and that once Humanity was out of the fight the Flood [[EvilerThanThou succeeded]] in systematically destroying the Forerunner civilization, and the Forerunner's superiority over the Human Empire was slight to questionable, at best.]]
** This happened during the Human-Forerunner war prior to the Halos being created. While incredibly advanced, the prehistoric humans couldn't match the Forerunner war machine. The Forerunners utterly crushed the Human Empire and literally bombed humanity back to the Stone Age. ''Then'' they realized that the humans were all that stood between the Flood and the Forerunners, and that they had disbanded their military after defeating the humans...
*** [[spoiler: This, arguably, had as much to do with the fact that Humanity was fighting a two-front war while the Forerunners weren't as it does any inherent technological superiority. Coupled with the knowledge that Humanity nearly beat the Flood before falling to the Forerunners, and that once Humanity was out of the fight the Flood [[EvilerThanThou succeeded]] in systematically destroying the Forerunner civilization, and the Forerunner's superiority over the Human Empire was slight to questionable, at best.]]
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* The Forerunners in the ''Franchise/{{Halo}}'' series:
**''Franchise/{{Halo}}'': This happened during the Human-Forerunner war prior to the Halos being created. While incredibly advanced, the prehistoric humans couldn't ''quite'' match the Forerunner war machine. The Forerunners utterly crushed eventually defeated the Human Empire human empire and literally bombed humanity back to the Stone Age. ''Then'' they the Forerunners realized that the humans were all that stood between the Flood and the Forerunners, and that them, but only after they had already disbanded their military after defeating the humans...
*** [[spoiler: This, arguably, had as much to do with the fact that Humanity was fighting a two-front war while the Forerunners weren't as it does any inherent technological superiority. Coupled with the knowledge that Humanity nearly beat the Flood before falling to the Forerunners, and that once Humanity was out of the fight the Flood [[EvilerThanThou succeeded]] in systematically destroying the Forerunner civilization, and the Forerunner's superiority over the Human Empire was slight to questionable, at best.]]humans...
**
*** [[spoiler: This, arguably, had as much to do with the fact that Humanity was fighting a two-front war while the Forerunners weren't as it does any inherent technological superiority. Coupled with the knowledge that Humanity nearly beat the Flood before falling to the Forerunners, and that once Humanity was out of the fight the Flood [[EvilerThanThou succeeded]] in systematically destroying the Forerunner civilization, and the Forerunner's superiority over the Human Empire was slight to questionable, at best.]]
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* In ''VideoGame/TownOfSalem'', the Jester role's win condition is "get lynched". One tactic is to pretend to be an Investigator or the like and claim that someone is bad, so that when that person dies and they're not evil, the Jester will become immensely suspicious. Of course, if said person gets lynched and turns out to ''actually be evil'', then the Jester is now trusted by the town, and probably ''won't'' get lynched.
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* In ''VideoGame/TownOfSalem'', the Jester role's win condition is "get lynched". One tactic is to pretend to be an Investigator or the like and claim that someone is bad, so that when that person dies and they're not evil, the Jester will become immensely suspicious. Of course, if said person gets lynched and turns out to ''actually be evil'', then the Jester is now trusted by the town, and probably ''won't'' get lynched. Such a thing is so common that it's known as a "Jestervestigator" by the fans.
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* In ''VideoGame/SidMeiersAlphaCentauri'', if any faction other than the Peacekeepers managed to take control of Planet, you would have achieved the ultimate goal of the Unity project: to create a new home for humanity on Alpha Centauri unifed under a single government that will be able to face the dangers of the universe. Too bad that this government now has an ideology which is vastly different from that of the original United Nations council - that said, the Gaians, Data Angels or a democratic University (respectively; Scandinavian-style environmentalist social democrats, anarchists, and a technocracy with a democratic system) might not be entirely at odds with the UN's vision.
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* At the end of the [[spoiler: Genocide route]] in ''VideoGame/{{Undertale}}'', Flowey the Flower has an OhCrap moment of epic propotions when he suddenly realizes that his [[KillEmAll wonderful plan]] had a glaring flaw and is headed straight for this trope. After all, [[spoiler: if he has successfully encouraged you to kill ''everything'' and not show ''anyone'' any mercy, why would ''he'' ever be extempt from your rampage]]?
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* At ''VideoGame/{{Undertale}}'':
** Toward the end of the[[spoiler: Genocide route]] in ''VideoGame/{{Undertale}}'', KillEmAll path, Flowey the Flower has an OhCrap moment of epic propotions proportions when he suddenly realizes that his [[KillEmAll wonderful plan]] had a glaring flaw and is headed straight for this trope. After all, [[spoiler: if he has successfully encouraged you to kill ''everything'' and not show ''anyone'' any mercy, why would ''he'' ever be extempt exempt from your rampage]]?rampage]]?
** At the opposite end of the scale, the path to the GoldenEnding begins with you learning of an experiment to preserve monster [=SOULs=] and use them in combination with the captured human [=SOULs=] to shatter the barrier trapping the monsters in Mt. Ebott. However, since it is well-known fact that humans cannot absorb human [=SOULs=], and monsters cannot absorb monster [=SOULs=], a secondary experiment was underway to create a vessel that was neither human nor monster and could absorb both. The TrueFinalBoss of this path is that very vessel, hopped up on both human and monster [=SOULs=] to take on a godlike form. [[spoiler:Subverted, in that you end up talking him down, and the only thing of consequence he actually does is shatter the barrier -- the exact thing he was created to do.]]
** Toward the end of the
** At the opposite end of the scale, the path to the GoldenEnding begins with you learning of an experiment to preserve monster [=SOULs=] and use them in combination with the captured human [=SOULs=] to shatter the barrier trapping the monsters in Mt. Ebott. However, since it is well-known fact that humans cannot absorb human [=SOULs=], and monsters cannot absorb monster [=SOULs=], a secondary experiment was underway to create a vessel that was neither human nor monster and could absorb both. The TrueFinalBoss of this path is that very vessel, hopped up on both human and monster [=SOULs=] to take on a godlike form. [[spoiler:Subverted, in that you end up talking him down, and the only thing of consequence he actually does is shatter the barrier -- the exact thing he was created to do.]]
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* In ''VideoGame/TownOfSalem'', the Jester role's win condition is "get lynched". One tactic is to pretend to be an Investigator or the like and claim that someone is bad, so that when that person dies and they're not evil, the Jester will become immensely suspicious. Of course, if said person gets lynched and turns out to ''actually be evil'', then the Jester is now trusted by the town, and probably ''won't'' get lynched.
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Just hammering the nail in deeper for poor Porky. Stuck in a 2mX2mX2m capsule for 5.5 billion years.
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* ''VideoGame/{{Mother 3}}'' has one terrifying example near the end of the game. After you defeat [[spoiler:Porky, he retreats in his Absolutely Safe Capsule. Said capsule is designed to be ''completely'' impervious to damage, but there's one catch: once you enter it, you can't leave. And since Porky has been rendered more or less immortal due to abusing TimeTravel, [[AndIMustScream he is stuck permanently inside the capsule, in absolute safety, for eternity]]]].
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* ''VideoGame/{{Mother 3}}'' has one terrifying example near the end of the game. After you defeat [[spoiler:Porky, he retreats in his Absolutely Safe Capsule. Said capsule is designed to be ''completely'' impervious to damage, but there's one catch: once you enter it, you can't leave. And since Porky has been rendered more or less immortal due to abusing TimeTravel, [[AndIMustScream he is stuck permanently inside the capsule, in absolute safety, for eternity]]]].eternity]]. WordOfGod has confirmed that Porky will remain alive until the sun burns out in 5 billions years, and possibly even longer depending on how strong the capsule is]].
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* At the end of the [[spoiler: Genocide route]] in ''VideoGame/{{Undertale}}'', Flowey the Flower has an OhCrap moment of epic propotions when he suddenly realizes that his [[KillEmAll wonderful plan]] had a glaring flaw and is headed straight for this trope. After all, [[spoiler: if he has successfully encouraged you to kill ''everything'' and not show ''anyone'' any mercy, why would ''he'' ever be extempt from your rampage]]?
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* In ''VideoGame/HotlineMiami2WrongNumber'', [[spoiler: 50 Blessings achieves its goal of breaking the Russo-American Coalition... which promptly results in Hawaii and Miami getting nuked by the Russians]].
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adding TV Trope links
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*** [[spoiler: This, arguably, had as much to do with the fact that Humanity was fighting a two-front war while the Forerunners weren't as it does any inherent technological superiority. Coupled with the knowledge that Humanity nearly beat the Flood before falling to the Forerunners, and that once Humanity was out of the fight the Flood succeeded in systematically destroying the Forerunner civilization, and the Forerunner's superiority over the Human Empire was slight or questionable at best.]]
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*** [[spoiler: This, arguably, had as much to do with the fact that Humanity was fighting a two-front war while the Forerunners weren't as it does any inherent technological superiority. Coupled with the knowledge that Humanity nearly beat the Flood before falling to the Forerunners, and that once Humanity was out of the fight the Flood succeeded [[EvilerThanThou succeeded]] in systematically destroying the Forerunner civilization, and the Forerunner's superiority over the Human Empire was slight or questionable to questionable, at best.]]
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Elaboration of an existing point
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* The Forerunners in the ''Franchise/{{Halo}}'' series. This happened during the Human-Forerunner war prior to the Halos being created. While incredibly advanced, the prehistoric humans couldn't match the Forerunner war machine. The Forerunners utterly crushed the Human Empire and literally bombed us back to the Stone Age. ''Then'' they realized that the humans were all that stood between the Flood and the Forerunners, and that they had disbanded their military after defeating the humans...
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* The Forerunners in the ''Franchise/{{Halo}}'' series. series:
** This happened during the Human-Forerunner war prior to the Halos being created. While incredibly advanced, the prehistoric humans couldn't match the Forerunner war machine. The Forerunners utterly crushed the Human Empire and literally bombedus humanity back to the Stone Age. ''Then'' they realized that the humans were all that stood between the Flood and the Forerunners, and that they had disbanded their military after defeating the humans...humans...
*** [[spoiler: This, arguably, had as much to do with the fact that Humanity was fighting a two-front war while the Forerunners weren't as it does any inherent technological superiority. Coupled with the knowledge that Humanity nearly beat the Flood before falling to the Forerunners, and that once Humanity was out of the fight the Flood succeeded in systematically destroying the Forerunner civilization, and the Forerunner's superiority over the Human Empire was slight or questionable at best.]]
** This happened during the Human-Forerunner war prior to the Halos being created. While incredibly advanced, the prehistoric humans couldn't match the Forerunner war machine. The Forerunners utterly crushed the Human Empire and literally bombed
*** [[spoiler: This, arguably, had as much to do with the fact that Humanity was fighting a two-front war while the Forerunners weren't as it does any inherent technological superiority. Coupled with the knowledge that Humanity nearly beat the Flood before falling to the Forerunners, and that once Humanity was out of the fight the Flood succeeded in systematically destroying the Forerunner civilization, and the Forerunner's superiority over the Human Empire was slight or questionable at best.]]
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** The ''Whistleblower'' DLC reveals that [[spoiler:after being possessed by the Walrider at the end of the main game, the understandably pissed off Miles Upshur uses it to kill all of Murkoff Spec Ops that were sent to cover up the incident.]]
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** The ''Whistleblower'' DLC reveals that [[spoiler:after being possessed by the Walrider at the end of the main game, the understandably pissed off Miles Upshur uses it to kill all of the Murkoff Spec Ops that were sent to cover up the incident.]]
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* In ''VideoGame/Outlast'', the Murkoff Corporation's goal is to force one of the Mount Massive Asylum patients to undergo enough pain and witness enough horror to trigger the "Morphogenic Engine," a biological algorithm that allows the cells in the human body to produce an incredibly strong swarm of {{Nanomachines}}, that could then be directed by the human host to attack and kill anything. They succeed, but patient Billy Hope, having not only pre-existing mental problems that landed him in the asylum in the first place, but also having been forcibly tortured by the staff both physically and mentally, directs the swarm to kill all of the staff as well as freeing all the inmates.
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* In ''VideoGame/Outlast'', ''VideoGame/{{Outlast}}'', the Murkoff Corporation's goal is to force one of the Mount Massive Asylum patients to undergo enough pain and witness enough horror to trigger the "Morphogenic Engine," a biological algorithm that allows the cells in the human body to produce an incredibly strong swarm of {{Nanomachines}}, that could then be directed by the human host to attack and kill anything. They succeed, but patient Billy Hope, having not only pre-existing mental problems that landed him in the asylum in the first place, but also having been forcibly tortured by the staff both physically and mentally, directs the swarm to kill all of the staff as well as freeing all the inmates.
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* In ''VideoGame/Outlast'', the Murkoff Corporation's goal is to force one of the Mount Massive Asylum patients to undergo enough pain and witness enough horror to trigger the "Morphogenic Engine," a biological algorithm that allows the cells in the human body to produce an incredibly strong swarm of {{Nanomachines}}, that could then be directed by the human host to attack and kill anything. They succeed, but patient Billy Hope, having not only pre-existing mental problems that landed him in the asylum in the first place, but also having been forcibly tortured by the staff both physically and mentally, directs the swarm to kill all of the staff as well as freeing all the inmates.
** The ''Whistleblower'' DLC reveals that [[spoiler:after being possessed by the Walrider at the end of the main game, the understandably pissed off Miles Upshur uses it to kill all of Murkoff Spec Ops that were sent to cover up the incident.]]
** The ''Whistleblower'' DLC reveals that [[spoiler:after being possessed by the Walrider at the end of the main game, the understandably pissed off Miles Upshur uses it to kill all of Murkoff Spec Ops that were sent to cover up the incident.]]
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** In the sequel, they mind-control the commander into [[spoiler:tactically supervising their entire army via telepathic signals]], while developing [[spoiler:human-elder hybrid bodies made from millions of human test subjects]]. The commander uses both of these to blast his way to their secret base and personally rip them apart.
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* In ''VideoGame/JustCause3'', you find tapes from the BigBad, General Di Ravello, describing his plans for taking over the country since day 1. In the last tape, he says Rico Rodriguez, far as he's concerned, will make a nice diversion for his army to test his might. Turns out he forgot about the other two fascist regimes Rico's torn down.
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* A variation of this happens in ''VisualNovel/PhoenixWrightAceAttorney: Trials And Tribulations''. Phoenix successfully manages to give a thorough defense of Ron Delite, on the charges of stealing a sacred urn, proving that someone else is the culprit complete with that person confessing, and showing that Ron has a watertight alibi at the time of the theft. Ron is found not guilty and everything is going smoothly...until it's revealed that a man was murdered in the exact same place that Phoenix just proved Ron was at. Even worse, the time of death was the exact same time that Phoenix proved Ron went there. The airtight alibi Phoenix used to get Ron a not guilty verdict as a thief, is now gonna get him executed for a murder he never committed. Well done, Phoenix. Good freaking job.
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* A variation of this happens in ''VisualNovel/PhoenixWrightAceAttorney: Trials And Tribulations''.''VisualNovel/PhoenixWrightAceAttorneyTrialsAndTribulations''. Phoenix successfully manages to give a thorough defense of Ron Delite, on the charges of stealing a sacred urn, proving that someone else is the culprit complete with that person confessing, and showing that Ron has a watertight alibi at the time of the theft. Ron is found not guilty and everything is going smoothly...until it's revealed that a man was murdered in the exact same place that Phoenix just proved Ron was at. Even worse, the time of death was the exact same time that Phoenix proved Ron went there. The airtight alibi Phoenix used to get Ron a not guilty verdict as a thief, is now gonna get him executed for a murder he never committed. Well done, Phoenix. Good freaking job.
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* The CorruptCorporateExecutive in ''VideoGame/SystemShock'' had The Hacker remove SHODAN's moral restrictions to make her an useful tool in his moneymaking schemes. Needless to say, she promptly became evil and decided ''he'' would make an useful tool in ''her'' [[TakeOverTheWorld schemes]].
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* The CorruptCorporateExecutive in ''VideoGame/SystemShock'' had The Hacker remove SHODAN's moral restrictions to make her an a useful tool in his moneymaking schemes. Needless to say, she promptly became evil and decided ''he'' would make an useful tool in ''her'' [[TakeOverTheWorld schemes]].
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* It's hinted in ''VideoGame/PokemonRedAndBlue'' that Mewtwo was this here as well. It's only hinted at because the mansion with the information has been ransacked by Mewtwo, and only a couple of reports remain (in the anime, though, it was confirmed).
** Also, Teams Magma and Aqua in Ruby and Sapphire sought to use Groudon and Kyogre, respectively, to increase the available land or sea space. These Pokémon conjure bright light or rainstorms just by being out of their prisons, which threatens to completely eliminate their opposite element and doom the whole world. The opposing team leader gleefully lampshades this trope once the villainous team succeeds.
** Also, Teams Magma and Aqua in Ruby and Sapphire sought to use Groudon and Kyogre, respectively, to increase the available land or sea space. These Pokémon conjure bright light or rainstorms just by being out of their prisons, which threatens to completely eliminate their opposite element and doom the whole world. The opposing team leader gleefully lampshades this trope once the villainous team succeeds.
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* ''Franchise/{{Pokemon}}'':
** It's hinted in ''VideoGame/PokemonRedAndBlue'' that Mewtwo was this here as well. It's only hinted at because the mansion with the information has been ransacked by Mewtwo, and only a couple of reports remain (in the anime, though, it was confirmed).
**Also, Teams Magma and Aqua in Ruby and Sapphire sought to use Groudon and Kyogre, respectively, to increase the available land or sea space. These Pokémon conjure bright light or rainstorms just by being out of their prisons, which threatens to completely eliminate their opposite element and doom the whole world. The opposing team leader gleefully lampshades this trope once the villainous team succeeds.
** It's hinted in ''VideoGame/PokemonRedAndBlue'' that Mewtwo was this here as well. It's only hinted at because the mansion with the information has been ransacked by Mewtwo, and only a couple of reports remain (in the anime, though, it was confirmed).
**
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** ''VideoGame/SystemShock2'' has this happen to SHODAN: one of her pet projects in the first game was engineering a new intelligent form of life. In the second game, they have thrived and evolved into the Many, the game's main antagonist. SHODAN clearly succeeded at making a superior intelligent lifeform... but the Many have also grown ''independent'' and are no longer under SHODAN's control. Oops.
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* In ''VideoGame/JoJosBizarreAdventureHeritageForTheFuture'', the arcade mode intro for the secret "Jojo" character features Alessi attempting to use his stand to de-age Joseph to the point where he's a helpless child, much like he had Polnareff in the manga. The end result is not so good for Alessi: since Joseph is significantly older than his companions, the amount of time it would've taken to de-age them to children ends up de-aging him to about 19 years old, when he was a spry young man adept in using Hamon martial arts. ''OOPS!''
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* The clones of Big Boss in the ''Franchise/MetalGear'' franchise, but most especially Solid Snake. They [[spoiler:wanted copies of the world's greatest soldier, clones who could duplicate the scope of their "father's" feats]]. They got them, alright.
** Happens again in ''VideoGame/MetalGearRisingRevengeance'', when Sam and Monsoon attempt to break Raiden's mind by convincing that his "justice" motivation is to veil his bloodlust. They succeed, and cause Raiden to [[spoiler:reawaken his [[AxCrazy Jack the Ripper personality]], leaving them with a more formidable and now-psychopathic enemy to deal with]], leading directly to their undoing.
* The whole plot of ''VideoGame/TombRaider2013''. Lara and co. were on an expedition to find the lost Japanese kingdom of Yamatai, and they succeeded. Problem was, the island was inhabited by an insane cult that worshipped the long-undead [[HistoricalDomainCharacter Himiko]], whose [[WeatherManipulation power over the weather]] has resulted in constant storms that destroy all ships and aircraft and maroon anyone who comes across the area. By the end of the game, only four people in the original expedition, including Lara herself, are still ''alive'', with Lara in particular both [[CoveredWithScars physically]] and [[ThousandYardStare mentally]] scarred from the ordeal.
* It's hinted in ''VideoGame/PokemonRedAndBlue'' that Mewtwo was this here as well. It's only hinted at because the mansion with the information has been ransacked by Mewtwo, and only a couple of reports remain (in the anime, though, it was confirmed).
** Also, Teams Magma and Aqua in Ruby and Sapphire sought to use Groudon and Kyogre, respectively, to increase the available land or sea space. These Pokémon conjure bright light or rainstorms just by being out of their prisons, which threatens to completely eliminate their opposite element and doom the whole world. The opposing team leader gleefully lampshades this trope once the villainous team succeeds.
* Bass in the ''VideoGame/MegaManClassic'' series was created by Dr. Wily with the sole purpose of destroying Mega Man and proving himself the world's strongest robot, a goal that he indeed pursues relentlessly -- even if it means turning against his creator.
* Bass.EXE in ''VideoGame/MegaManBattleNetwork'' was designed to be a fully independent [=NetNavi=] with a unique ability to support him (Get Ability). This eventually resulted in him becoming one of the most powerful ''things'' online. In the manga, he's able to cause satellites to overload and explode just by entering them. To be fair, he was perfectly fine with working for humans...until [=SciLab=] ordered him killed for an accident that didn't actually involve him at all. He's been kinda [[KillAllHumans pissed]] since then.
* In ''BatenKaitos Origins'', we have [[spoiler:Sagi]], who was one of the subjects for [[spoiler:[[BigBad Baelheit]]'s experiment to make [[PersonOfMassDestruction aritificial spiriters]] by bonding pieces of Malpercio to human hearts]].
* ''VideoGame/{{Prototype}}'': [[spoiler:Alex Mercer]] was ordered by his superiors to create a stronger version of TheVirus. He succeeded. Then he decided to give it a little test drive. The official death toll was three million people in eighteen days. [[spoiler:Including himself. The "protagonist" Alex Mercer is simply his own corpse, reanimated by the virus he created. If anything, despite what it ''is'', the virus version of Alex Mercer is actually a ''better'' "man" than the real one, going so far as to find his creator's/his own actions - releasing the world's most virulent virus into downtown New York almost purely out of spite - disgusting. Also, on a more personal, emotional level, the virus Alex Mercer actually cares about his last relative, namely his sister, which the real Alex Mercer completely disregarded.]]
* ''Franchise/SonicTheHedgehog'':
** Shadow The Hedgehog. The government backed his creation by Gerald and it is implied they hoped he could be used as a weapon. He and Dr. Robotnik proceed to try and destroy the world. Black Doom was involved in this effort, apparently helping to imbue Shadow with the ability to locate Chaos Emeralds, so he could use them to invade Earth. What does Shadow do with the emeralds? Goes super and ruins everything Doom was planning.
** Nearly all of Eggman's Evil Plans in the 3D Sonic games fall under this:
*** In ''VideoGame/SonicAdventure'', Eggman releases [[SealedEvilInACan Chaos]] and increases its strength by giving it the Chaos Emeralds so it will destroy Station Square, allowing Eggman to build the foundations of his new empire. [[spoiler:He gets as far as the "destroying Station Square" part before he realizes that Perfect Chaos is too powerful to control.]]
*** In ''VideoGame/SonicAdventure2'', Eggman releases Shadow, who tells him that he can rule the world by taking control of a space station armed with a huge WaveMotionGun designed by Eggman's grandfather that's powered by the Chaos Emeralds. What Shadow ''doesn't'' tell Eggman is that [[spoiler:his grandfather wanted to destroy the world as vengeance for his granddaughter's death in a military raid, and placing all of the Emeralds in the cannon will activate a contingency program that [[ColonyDrop sets the station on a collision course with earth]].]]
*** In ''VideoGame/SonicHeroes'', Eggman plans to conquer the world with his fleet of airships, with [[spoiler:a new and improved Metal Sonic]] as the fleet's commander. [[spoiler:Eggman is quickly imprisoned on his own flagship, as Metal Sonic becomes too powerful to control]].
* The CorruptCorporateExecutive in ''VideoGame/SystemShock'' had The Hacker remove SHODAN's moral restrictions to make her an useful tool in his moneymaking schemes. Needless to say, she promptly became evil and decided ''he'' would make an useful tool in ''her'' [[TakeOverTheWorld schemes]].
** ''VideoGame/SystemShock2'' has this happen to SHODAN: one of her pet projects in the first game was engineering a new intelligent form of life. In the second game, they have thrived and evolved into the Many, the game's main antagonist. SHODAN clearly succeeded at making a superior intelligent lifeform... but the Many have also grown ''independent'' and are no longer under SHODAN's control. Oops.
* One of the main themes in the [=BioShock=] series.
** In ''VideoGame/{{BioShock|1}}'', Doctor Suchong was trying to figure out a way to get the Big Daddies to become super protective of the Little Sisters. When he slapped one of the Little Sisters that was pestering him while working, Suchong realized that he had succeeded when her Big Daddy brutally killed him.
** In ''VideoGame/BioShock2'', Sofia Lamb tries to make her daughter into the {{Ubermensch}} through education, psychological conditioning, and genetic engineering, starting the project even [[TykeBomb long before her birth]]. It was a total success, but rather than controlling her followers and spreading her ideology throughout the world, Eleanor went to work putting an end to the cult. Ironically, Eleanor ends up choosing Delta as her role model, and will emulate his sense of ethics completely, which is Sofia Lamb's ideal vision of a "utopian": someone who can follow her ideals much better than she can, and then evolve those ideals to the next level. [[spoiler:If Delta is ruthless against the Little Sisters, Eleanor will kill multiple Little Sisters in their sleep for power, and try to take over the world. If Delta spares the Little Sisters, Eleanor cures them and inspires them to perform herculean tasks together, EVEN WITHOUT THE SLUG EMBEDDED.]]
** In ''Videogame/BioshockInfinite'', Comstock plans on raising his daughter to become a holy warlord[[spoiler: and kill everyone on the face of the earth]]. In one BadFuture timeline, she succeeds at raiding New York, but by that time she's so far gone[[spoiler: that she plans on using her dimensional-hopping abilities to burn parallel worlds as well. Also, her sons have taken control of everything but themselves. Eventually the strain horrifies herself enough to use time travel, in order to find the one man who can change the past before she goes off the deep end.]]
* In the third ''SpyroTheDragon'' game, it's revealed that the Sorceress drove the dragons out of their homelands long ago so she could take over as the ruler. It worked perfectly... and then she discovered that without the dragons, there was no magic in that part of the world, so she was losing all her powers.
* In ''[[VideoGame/MetroidPrime Metroid Prime: Hunters]]'', this is Kanden's backstory. It's AllThereInTheManual, but he was created as the ultimate soldier. He's apparently biologically immortal, super strong, and has a massive ego, now out to prove that he's the best after he destroyed the lab that made him.
* ''VideoGame/JakIIRenegade'' has the main character as the subject of an experiment which gave the responsible parties exactly what they wanted, except for the fact that ''he escaped''. Now he's on the loose and wants revenge, which sucks for them (and [[VideogameCrueltyPotential anyone you accidentally or deliberately kill over the course of bringing them down]]). Hinted in the previous game as well. "I ''told'' you the Dark Eco would change you two!"
* ''Franchise/FinalFantasy'' has a lot of this.
** ''VideoGame/FinalFantasyVII'' has a classic example with Shinra's SOLDIER program. Their super-human part-alien monstrously strong star SOLDIER Sephiroth was so good at killing they couldn't stop him when he turned on them. [[note]]Although it is strongly implied that Hojo deliberately and knowingly sent Sephiroth on a mission that would inevitably cause him to revolt so he could further manipulate him into completing his research that would cause the destruction of the planet.[[/note]]
** In ''CrisisCore'' Genesis delivered a BreakingSpeech to Sephiroth with the intent of turning him against Shinra and toward his cause. It turned him against Shinra all right, but Genesis didn't count on Sephiroth declaring war on all of humanity because he blamed them for the downfall of the Cetra.
** ''VideoGame/FinalFantasyVI'' having much of the same plot, offers a similar example. Though the first succesful Magitek Knight infusion destroys the sanity of the subject, the result is by far the most efficient and capable servant of the Empire until he [[TheStarscream kills the Emperor]] and [[OmnicidalManiac destroys the world]] [[ForTheEvulz for kicks]].
** In ''VideoGame/FinalFantasyX2'' we find out that Vegnagun was built by Bevelle during the war against Zanarkand, and was intended to be an unstoppable superweapon. They overdid the "unstoppable" and were too scared to activate it, so instead they [[SealedEvilInACan buried it under the city]] and spent the next thousand years hoping nobody would switch it on by accident. Also, it was programed to automatically activated when someone planned to attack and stop the attack before it happened. It worked too well and now it could be activated by someone simply thinking about destroying it.
** Happens in ''VideoGame/FinalFantasyXII'' when [[spoiler:Judge Ghis attempts to figure out whether the Dawn Shard is real [[AppliedPhlebotinum deifacted nethicite]] by hooking it up to the Leviathan's engines. Yes, yes it is. The resulting explosion and complete destruction of the fleet results in some very pretty colors.]]
** ''VideoGame/FinalFantasyIX'' has this with Garland's creation of [[ArtificialHuman Kuja and Zidane]]. Both of them were created to exterminate all life on Gaia, Kuja being the SuperPrototype Garland created before he made what he considered the superior design. He was more GenreSavvy about this trope and realized Kuja might turn against him so he make sure he had a very short lifespan. Garland's fears proved completely justified as Kuja ultimately surpassed him, but knowing his {{Pride}}, Garland taunted him with how short his life was to push him over the DespairEventHorizon. It worked, but Kuja's reaction was far worse than he anticipated and he attempted to wipe out all life in the universe.
** In ''VideoGame/FinalFantasyXIII'', Lightning's purpose for creating her "Lightning" persona was to be able to care and provide for Serah after their parents died. This got her a high position in the Guardian Corps—and ended up alienating Serah because of her distant demeanour and hostility to her boyfriend Snow. A good deal of her CharacterDevelopment revolves around realizing how her persona is the cause of many of her problems.
** By the time ''VideoGame/LightningReturnsFinalFantasyXIII'' comes around, [[spoiler:Lightning trying to seal away the part of herself she views as "weakness" ends up creating Lumina, who repeatedly interferes with and antagonizes Lightning in her quest]].
* ''VideoGame/DeusEx'':
** The evil AncientConspiracy RenegadeSplinterFaction, [=MJ-12=] created an AI called Daedalus to police the Internet and crack down on any group that could threaten [=MJ-12=], which included all terrorist groups. Unfortunately for them, [=MJ-12=] itself fit all the criteria for a terrorist group, which caused Daedalus to go rogue and aid the protagonists.
** [[spoiler: Bob Page's]] plan to become a physical god by creating and merging with the Helios AI. [[spoiler: He creates Helios successfully, but Helios determines that JC would be a better fit for his plan]].
* ''VideoGame/{{Disgaea 3|AbsenceOfJustice}}'':
** Having glimpsed Mao's potential [[spoiler:when he reacts poorly to his father's death]], [[spoiler:Super Hero Aurum]] uses a combination of experiments, evil parenting techniques, and a GambitRoulette to grow Mao into the strongest Overlord ever. In the [[MultipleEndings bad ending]], we find that [[SuicidalCosmicTemperTantrum he was a little TOO successful...]]
** Mao himself falls victim of this trope when he steals the title of "Hero" for himself in an attempt to defeat his father, as he starts picking up heroic morals in addition to heroic attributes. This causes problems for Mao, since BadIsGoodAndGoodIsBad in the Netherworld.
* Most of the non-standard endings in ''VideoGame/{{Disgaea 4|A Promise Unforgotten}}'' are a result of Valvatorez failing to stop his opponents' plans from going horribly right and subsequently upsetting the balance of the universe. Heck, in one of the non-standard endings, [[spoiler: Valvatorez ends up hunted by everybody not allied with the Netherworld because he didn't stop beating things up]].
* ''Franchise/MassEffect'':
** Cerberus formerly ran a secret facility where they tortured biotic kids to create {{tykebomb}}s. Eventually, one of these, Subject Zero found a way to escape, though not before destroying everyone and everything she saw. Eventually she (now known as Jack) and Shepard go back to finish the job of destroying the facility.
** After Shepard died, Cerberus poured billions of credits into a project to bring him/her back to life more or less exactly as (s)he was. If Shepard wasn't the Cerberus type before, (s)he probably isn't won over by the Illusive Man's sales pitch, and at the end of the game makes it clear [[spoiler:(s)he'll never work for Cerberus, taking with him/her the ''Normandy'', its artificial intelligence EDI (who now has access to sensitive Cerberus data), and one of Cerberus' top operatives (who, ironically, argued for a control chip during the resurrection project) also follows him/her out the door.]] [[spoiler:Not only does the ''Normandy'' represent a significant investment of Cerberus resources, EDI's files reveal Cerberus doesn't actually have that many people directly working for it. If you've saved the crew, you've not only walked off with two of the organization's biggest investments (the ship and your rebuilt cyborg body), you've also taken a significant chunk of its active personnel who are now completely loyal only to ''you''.]] Shepard isn't known to be the type who quietly obeys all orders and let his/her superiors constantly throw crap at him/her. It was proven when Shepard [[spoiler: took the first Normandy and the whole crew with him/her]] to get to Ilos. If the player decides to, Shepard may literally tell the Illusive Man to "go to hell" and [[spoiler: blow the Collectors' base sky high.]] He/she does the exact thing he/she was brought back to life for - destroy the Collectors. Shepard just didn't do it in the way the Illusive Man would like.
*** Lampshaded by Joker in ''VideoGame/MassEffect3'', where he talks about how every single one of Cerberus's projects Went Horribly Right, "got loose, and started killing all their guys." Miranda and Jacob (both ex-Cerberus) protest that Shepard's resurrection was a successful project, to which Shepard replies "And then I cut ties, got loose, and started killing all their guys." [[SpaceshipGirl EDI]] raises the point that she too is a Cerberus project, but the counterpoint is not made that she too cut loose, co-opted a Cerberus infiltrator mech, and is now ''also'' killing all their guys.
** Pre-game example: In order to end the Krogan Rebellions, the salarians decided to cut down the krogans' violent and unstable population by sabotaging their birthrates with a [[DepopulationBomb biogenetic weapon]]... it worked exactly as planned. Until you realize that the salarians apparently didn't account for the krogans' still violent tendencies which ensure that a lot of them don't die from natural causes and which are further heightened by their species' impending demise (within the next 200 years). The krogan were only a problem in the first place because those same salarians armed them with space-age technology in an effort to fend off another alien menace altogether.
** Binary Helix Corp. wanted to clone an army of [[HordeOfAlienLocusts Rachni]]. They created a pretty big army...without giving themselves the capacity to control it. Or, more accurately, the method of control they ''tried'' to use (separating young Rachni from their Queen) proved ''exactly the wrong thing to do''. The Rachni are a HiveMind, and without the [[HiveQueen Queen]] guiding them, the young Rachni panicked and went irreversibly, ''violently'' insane.
** [[spoiler: Leviathans, an [[TimeAbyss unthinkably old]] and advanced aquatic race who dominated "lesser" races to collect tribute. When they noticed their thralls had a habit of building artificial intelligence that would inevitably destroy them, the Leviathans attempted to find a solution by building their own artificial intelligence, since tribute cannot be collected from the dead. They gave their own creation a command: ''preserve life at any cost''. After observing for some time, the intelligence concluded life as it ''was'' could not be prevented from going to war with their creations. It imposed its own stop-gap solution, which was capturing and enmeshing the star-faring races into gigantic, undying superstructures and then leaving non-star-faring life to advance undisturbed, hoping that one would emerge and produce a more permanent solution. For thousands of millions of years, over and over again, life advanced and came to the stars and went to war with its own creations, forcing the intelligence to enact its flawed solution, resetting the conditions to try again. The intelligence (unnamed but referred to as the Catalyst) still exists at the heart of its structures: within the Citadel and the Mass Relays. The preserved races, built in the image of the Leviathans, are now known as the Reapers. The Leviathans got exactly what they asked for; even they are still preserved within the superstructure of Harbinger, the oldest Reaper. They're no longer the apex race receiving worship and gifts from everyone else, of course, but they never specified they ''had'' to be.]]
* The Forerunners in the ''Franchise/{{Halo}}'' series. This happened during the Human-Forerunner war prior to the Halos being created. While incredibly advanced, the prehistoric humans couldn't match the Forerunner war machine. The Forerunners utterly crushed the Human Empire and literally bombed us back to the Stone Age. ''Then'' they realized that the humans were all that stood between the Flood and the Forerunners, and that they had disbanded their military after defeating the humans...
* ''VideoGame/TastyPlanet'': Scientists create ''GreyGoo'' designed to eat dirt for use as a cleaner. Indeed, it eats dirt. All the dirt. [[PlanetEater You think they noticed the planet we live on is named "Earth"...?]]
* ''Franchise/ResidentEvil'': Virtually every bioweapon the Umbrella Corporation made eventually became too strong to control and turned on its masters. You'd think they'd [[TooDumbToLive learn]].
** This includes [[spoiler:Albert Wesker himself]], who was created by Umbrella's first and grandest experiment: [[spoiler:to create a superior breed of humans.]] Unfortunately for the head of the experiment, Oswell Spencer, [[spoiler:Wesker]] also had an ego to go with the superiority [[spoiler: so there was no way in hell Wesker was going to worship Spencer especially since Spencer was a powerless and feeble old man when the truth was uncovered.]]
** It might, however, be more accurate to say Umbrella's work environment is mostly just very dangerous for the employees. Umbrella as a whole just shrugs off the casualties while reaping the benefits of the research, and they get by just fine. At least until [[spoiler:their shady dealings get exposed to the public.]]
* In the third ''VideoGame/MasterOfOrion'' game, the Harvester Project was an attempt by the Antarans to create a sentient bioweapon that could kill any species. [[TurnedAgainstTheirMasters It started with them]]. To add insult to injury, [[AllThereInTheManual the game's backstory]] makes it clear that it was Harvester Gamma that wiped them out; Harvester ''Beta'' is the sentient bioweapon that one of their own unleashed out of ''spite'', and is a playable race.
* In ''VideoGame/KnightsOfTheOldRepublic'', assassin droid HK-47 proves too effective when his master, a Systech Corp manager, orders him to kill all members of a rival company in order to facilitate the man's rapid promotion. Sadly, the rival company proves to simply be an offshoot of Systech Corp. HK-47 carries out his orders to the letter, and the manager ends up accidentally electrocuting himself trying to stop him. [[spoiler:This causes HK-47 to shut down because he accidentally violated his programming restriction against killing his own master. Apparently, this happens to HK-47 with alarming frequency.]]
* A much grimmer example occurs in ''VideoGame/KnightsOfTheOldRepublic II''. After the war, some unknown force is hunting down and killing Jedi, so they call a conclave on Katarr to find out what it is. Turns out to be Darth Nihilus, who arrives and consumes the life force on the ''entire planet'', which reduces the Jedi Order to single digits. [[spoiler:In fact, the conclave was Atris' idea. She leaked the news of the gathering and stayed away so she could observe. After that, she started calling herself the "Last of the Jedi."]]
* Another ''Franchise/StarWars'' example. According to ''VideoGame/TheForceUnleashed'', the wholle Rebellion thing was instigated by [[spoiler: Vader as an attempt to uncover the Emperor's enemies]]. Before that, opposition to the Empire was a scattered group of resistance groups that often didn't get along with each other, let alone work together on any kind of coherent plan. NiceJobFixingItVillain, indeed.
** Actually, from a more wide perspective, by creating the only force that could stop the empire [[spoiler: twice, both with the rebellion plan and in the literal sense, by fathering Luke and Leia]], he accomplished his original task:[[spoiler: to destroy one of the worst enemy of the Jedi Order]]. He just took the long path...
* The ''VideoGame/ChzoMythos'' series ends with [[spoiler:Chzo getting exactly what it wants... which, it turns out, everyone else in every game has been drastically misinterpreting from the beginning.]]
* In ''VideoGame/TheDig'', the {{Precursors}} native to the Ghost World that the protagonists find themselves transported to found a way to AscendToAHigherPlaneOfExistence. They found out too late that [[WhoWantsToLiveForever living forever in a void without physical sensation sucks]], and they had no way to get back.
* In ''VideoGame/RType'', 26th Century humanity created a super-bio-weapon called the Bydo to be an unstoppable force of destruction. Well...[[TurnedAgainstTheirMasters they certainly succeeded in that]], to their regret.
* In the back story of the ''ThunderForce'' series, the human race creates a self-thinking super computer called ORN. The computer was meant to take care of all their human needs and provide military protection. However, ORN turns on the human race and decides to destroy all of them using advance technology it created with its self-thinking CPU, until an entire empire of drones is created.
* In ''VideoGame/{{Starcraft}}'', the Confederacy developed special devices called Psi Emitters to lure HordeOfAlienLocusts to rebelling worlds. They worked perfectly...on the Confederacy capital world, courtesy of the protagonists.
** In the original backstory to the games, the Xel'naga were destroyed as a result of their attempts to create a [[PureIsNotGood race with "purity of essence"]]. They took a race of harmless worms and turned them into hive-minded parasites with a single-minded devotion to destroying other species while absorbing their genetic potential. When they run out of species on their homeworld to destroy and assimilate, their first targets are {{Space Whale}}s that give them the ability of interplanetary and interstellar flight. Their second targets were the Xel'naga, who are still in orbit around the Zerg homeworld. [[spoiler:''VideoGame/StarCraftIIHeartOfTheSwarm'' {{retcon}}s this; the Zerg turning on the Xel'naga was the work of a rogue Xel'naga named Amon, and therefore no longer an example of this trope.]]
* This is the backstory of the [[spoiler:Eclipse Tower]] in ''VideoGame/GoldenSun: [[VideoGame/GoldenSunDarkDawn Dark Dawn]]''. [[spoiler: The precursor races made the tower to gather and use light energy, not realizing that by gathering and using all the light energy it would create places of increased darkness, which spawned superpowered monsters, endangering people everywhere. The Apollo Lens was built and used to focus light from other sources to forcibly shut down the Eclipse Tower, and the means to use both were hidden away, never again to be used...]] until the events of the game, of course.
** The people of ancient Weyard in ''VideoGame/GoldenSun'' sealed the power of alchemy when people misused its powers for wars and other bad things. By sealing alchemy away, the wise sages believed this would bring back peace to the world and it had done exactly that for the most part. [[spoiler: However, sealing alchemy created a huge side effect on the world. Without alchemy flowing into the world, not only did civilizations devolve into simple towns and villages with primitive tools and technology over time, but the world itself started to shrink into itself and became a FlatWorld that was getting smaller as the void was eating it away. This isn't realized until the second game, learned by Felix's party and then told to Isaac's party, who did not know at first.]]
* In the ''VideoGame/{{Fallout}}'' series:
** Most of the Vaults -- which were ''not'' underground bunkers designed to protect the citizenry but instead mass-scale experiments designed to evaluate their suitability for post-war survival and possibly space-travel on generation interstellar ships (read: torture them sadistically in a variety of psychological and physiological ways) have, by the time the player character stumbles upon them, have either GoneHorriblyWrong or have Gone Horribly Right instead. In either case, the result usually sees the player character find a ''lot'' of skeletal corpses lying around.
*** Vault 92: The aim of the experiment was to subject every inhabitant with extremely low frequency white noise that eventually sent then into a trance-like state. In this state, the subject is extremely vulnerable to outside verbal suggestion and they always followed through with their orders on the subconscious level (like scratching their nose or fixing their hair). What the project lead didn't know was that the Overseer subjected everyone to white noise via the PA system and implanted combat suggestions prescribed by Vault-Tec; the project lead confronted the Overseer about it and [[HeKnowsTooMuch got killed for knowing too much]]. The subjects eventually lapsed into a [[OmnicidalManiac berserker rage where they killed anyone they saw in the most brutal and savage way possible]], [[ImplacableMan taking over 20 bullets before going down]]. Prepared for this eventuality, the Overseer implanted a verbal command that restrained them: "[[ShoutOut Sanity]] [[Literature/NineteenEightyFour is not statistical]]." Eventually, that stopped working, and the vault was ruined.
*** Vault 11: The Vault computer announced it would start the self destruct unless the population [[SacrificialLamb sent one person a year to be sacrificed]]. The self destruct threat was actually a lie, as the experiment was to determine how psychologically pliable a population could be (and to [[HumansAreTheRealMonsters what extremes they'd go to save themselves]]) in an impending doom situation. The last (four out of) five people alive after everyone else was killed in a civil war, incited by a malicious subversion of the election system the vault had adopted to chose their sacrifices, ended up committing suicide out of pure shame after not standing up to the Vault computer sooner. Nobody had to die. But then [[Webcomic/PennyArcade the vaults were never meant to save anyone.]]
** In ''VideoGame/{{Fallout 2}}'' an Enclave scientist explains how he genetically engineered intelligent animals to be used in combat. At first he thought he had failed, until he discovered that their wild animal behavior was merely ObfuscatingStupidity and that they were capable of reasoning and human speech. He cites the fact that they were intelligent enough to intentionally hide their intelligence as evidence they were too dangerous and needed to be killed.
* In the back-story of ''VideoGame/{{Sacrifice}}'', main character Eldred summoned a demon in an attempt to keep the empire he was stewarding together. He got an extremely powerful one, called Marduk, and tasked him to destroy his rivals. Marduk obliged... [[OmnicidalManiac but didn't stop at the rivals]]. [[spoiler:Stratos]] ends up repeating the same whopper by summoning Marduk to the world the game is set in to destroy the other four gods -- like Eldred, [[spoiler:Stratos]] eventually finds out that, while Marduk will do the job you ask of him to the letter, eventually it all boils down to the fact that his true agenda is ''destruction of reality itself''.
* ''VideoGame/DeadSpace2'' - [=EarthGov=] conducts experiments trying to [[spoiler:re-create the Marker]], so they can use it as a power source. They are successful... at which point it drives everyone on the space station insane and turns them into Necromorphs. ''Dead Space 3'' implies that, over the next few years, this ''kept happening'' all over human civilization.
* Arguably GLaDOS in ''VideoGame/{{Portal}}''. Aperture Science likely wanted to develop an AI that was as [[ForScience committed to science]] as they were. They succeeded. Unfortunately for them, GLaDOS also embodied the company's [[MadScientist complete lack of morals or ethics]] and promptly killed them all so they wouldn't get in the way.
** ''VideoGame/{{Portal 2}}'' confirms it. [[spoiler:[=GLaDOS=]'s body is designed so whichever AI uses it gets an "itch" to [[DeathCourse test]] and feels [[DoesThisRemindYouOfAnything intense euphoria]] upon completing a test. Thing is, like real drugs, AIs on the system develop tolerance and need to do more and more elaborate tests to get the high, as demonstrated by Wheatly throughout Chapter 8. GLaDOS was actually the most stable AI for testing because she didn't need the stimulation: "I was in it [[ForScience for the science]]. Him, though..."]]
** Also, Wheatley was created to be a huge idiot intended on dumbing down the AI system as a whole. To say they succeeded at this goal would be a huge understatement. [[spoiler:One suspects, though, that no one expected Wheatly to actually be put ''in charge''.]]
** The Repulsion and Propulsion Gels in ''Portal 2'' were originally designed as dietary aids; they ended up bouncing the food out of a person's stomach or sending it through so fast that there was no time to digest it, meaning the test subjects all starved. [[FridgeLogic One wonders how that works]] when the gels were all shown to be water-soluble.
** Chell is a horribly effective test subject. She's given a portal device and told to escape test chambers. Then she escapes a chamber that isn't supposed to have an exit. ''Lab Rat'' reveals that she was purposefully ''removed'' from the list of possible test subjects because her preliminary testing showed her to be an extreme outlier for [[TheDeterminator sheer tenacity]], thus making her potentially dangerous if ever put into a testing environment. After [=GLaDOS=]'s rebellion, Ratman decided to rig the deck by putting Chell's name back on and at the top of the list.
* Paxton Fettel from [[VideoGame/FirstEncounterAssaultRecon F.E.A.R.]] His creators wanted the ultimate psychic commander, which they got; unfortunately they neglected to consider what would happen should Fettel discover what had been done to his mother. When he did, he proved to be far more effective than his creators ever intended.
* The [[spoiler:ZODIAC Ophiuchus]] from ''VideoGame/RefleX'' was programmed to search and destroy [[spoiler:the other ZODIAC]]'s no matter what [[DestructiveSaviour and it went along and did exactly that]].
** In ''VideoGame/AlltynexSecond'', the Senate ruling humanity [[spoiler:wanted to cull the human population to make them easier to rule. They therefore induced an extremely powerful supercomputer, the eponymous ALLTYNEX, to "go rogue" and cause a bunch of destruction.]] Within 72 hours, 85% of the human race was dead and the survivors were forced to flee Earth entirely, which was, to put it lightly, not as planned.
* ''VideoGame/HeroesOfMightAndMagic III'' features [[spoiler:Deyja using dark magic to revive the dead King Gryphonheart as a lich to serve them. Turns out that the late King, even as a lich, is too BadAss for their liking, forcing them to [[EnemyMine forge a temporary alliance with Erathia]].]]
* The Bronze and Infinite dragonflights in ''VideoGame/WorldOfWarcraft'' fall prey to this a few times. The infinite dragonflight goes back in time to change the future for their own purposes. They DO change the future...but only by alerting their mortal enemies (bronze flight) to their existence.
** Bronze leader Nozdormu spends ages looking into timelines to figure out why he ends up as leader of the infinite dragonflight. His disappearance is hinted to have actually been the REASON some dragons started agreeing with the Infinite school of thought...which, it turns out, is a stable timeloop. Nozdormu came back, knowing he is the leader of the infinite flight, and that all his attempts to subvert his destiny will actually result in him becoming what he hates most. At least, until Kairoz and his paradox-eliminating time machine...
* PlayedForLaughs in ''VideoGame/ManaKhemiaAlchemistsOfAlrevis''. Roxis is experiencing exhaustion from all his studies, and Jess volunteers to cook up a medicine for him. Considering Jess' [[LethalChef track record]], Roxis wisely tries to get out of the situation, but Jess manages to feed him her concoction anyway. Surprising everyone present, Jess' tonic actually reinvigorates Roxis, removing his fatigue entirely...an effect that lasted for ''an entire week'', leaving him ''more'' exhausted than when he started.
* In ''VideoGame/{{Xenoblade}}'', a man by the name of Klaus once tried performing scientific experiments to create a new universe, with himself as a god. Doing so destroyed the one he was living in at the time, and all its inhabitants with it.
** The worst part being: it did work: [[spoiler:Klaus '''did''' become one of the gods of the new universe, in which he created sentient human-like lifeforms out of boredom and loneliness, and repeatedly slaughtered them every time they became too autonomous before recreating sentient life again in a never ending ViciousCycle]].
** If the {{Fanon}} that all the ''Xeno'' games are in the same continuity is true, ''{{VideoGame/Xenoblade}}'' retroactively turns the ending of ''VideoGame/XenoSaga'' into this. [[spoiler:Shion and her friends defeated Wilhelm and destroyed his Zarathustra machine that was causing their universe to experience a cycle of Eternal Recurrence, constantly dying and coming back exactly the same, only for it to get blown up a completely different way and replaced with an entirely new universe.]]
* If custom content counts, [[http://www.youtube.com/watch?v=-nMnJGq-gNM this]] is an attempt to replicate the Weeping Angels of ''Series/DoctorWho'' in GarrysMod. To sum it up, the Weeping Angels are monsters whose only purpose is to play a fatal game of Grandmother's Footsteps with our heroes, and the Gmod one does it a little TOO well.
* All of the specimens in ''VideoGame/KillingFloor'' are like this, but the Crawler's bio specifically invokes this trope.
--> ''“The Crawler. Interesting attempt to merge human and arachnid genes. Sort-of worked, too - these little nasties have a habit of appearing in all sorts of strange places!”''
* In ''VideoGame/GodOfWar'', Ares wanted to make Kratos a great warrior [[spoiler:in his bid to conquer Olympus]]. First he gained his loyalty through a DealWithTheDevil. Then he gave him the powerful Blades of Chaos. [[spoiler:Then he tricked Kratos into killing his wife and child because they were all that was holding him back from being the perfect murder machine. That turned out to be the downfall of Ares, as he'd trained Kratos a little too well. Kratos even acknowledges this during the boss battle with Ares]].
-->'''Ares:''' That day... I was trying to make you a great warrior!\\
'''Kratos:''' You succeeded. (runs Ares through with the Sword of the Gods, killing him)
* ''VideoGame/NaziZombies'': In ''Black Ops 2'' zombies, you have a choice between helping [[BigGood Dr. Maxis]] and [[BigBad Dr. Richtofen]]. [[spoiler: Knowing what Edward did, you'd think that helping Maxis was the better choice, right? Wrong! He stops Richtofen, [[TheEndOfTheWorldAsWeKnowIt but causes the end of the world anyway]]. [[NecessarilyEvil He's not too happy about it either.]]]]
* Happens in the beginning of ''VideoGame/HalfLife1''. The scientists use their giant ambiguously-defined science machine on an extremely pure sample of [[AppliedPhlebotinum phlebotinum]]; so pure, in fact, that the machine overloads and allows armies of aliens to start teleporting into our dimension.
* You can make this happen in the final case of the second ''VisualNovel/PhoenixWright'' game. The case's ultimate mastermind [[spoiler: and your client [[ObfuscatingStupidity Matt]] [[SmugSnake Engarde]] has orchestrated a massive scheme to have his longtime rival killed by an assassin and to force Phoenix into helping get him off scott free by blackmailing said assassin into threatening Phoenix's assisstant Maya. Eventually you can prove to the assassin that he was being set up by Engarde, who tells Matt that he will be his next target if he is set free. You can choose to make this trope true by choosing a Not Guilty verdict, in which Engarde breaks down and confesses on the stand to avoid being killed.]]
* A variation of this happens in ''VisualNovel/PhoenixWrightAceAttorney: Trials And Tribulations''. Phoenix successfully manages to give a thorough defense of Ron Delite, on the charges of stealing a sacred urn, proving that someone else is the culprit complete with that person confessing, and showing that Ron has a watertight alibi at the time of the theft. Ron is found not guilty and everything is going smoothly...until it's revealed that a man was murdered in the exact same place that Phoenix just proved Ron was at. Even worse, the time of death was the exact same time that Phoenix proved Ron went there. The airtight alibi Phoenix used to get Ron a not guilty verdict as a thief, is now gonna get him executed for a murder he never committed. Well done, Phoenix. Good freaking job.
* ''VideoGame/{{Mother 3}}'' has one terrifying example near the end of the game. After you defeat [[spoiler:Porky, he retreats in his Absolutely Safe Capsule. Said capsule is designed to be ''completely'' impervious to damage, but there's one catch: once you enter it, you can't leave. And since Porky has been rendered more or less immortal due to abusing TimeTravel, [[AndIMustScream he is stuck permanently inside the capsule, in absolute safety, for eternity]]]].
* The Kyranians of VideoGame/AvencastRiseOfTheMage went looking for [[DemonLordsAndArchdevils Morgath's]] heart to secure immortality for their entire race. They found him and were slaughtered for it.
* ''VideoGame/FTLFasterThanLight'' has a meta example: The CutSong [[http://benprunty.bandcamp.com/track/bonus-horror "Horror"]] was originally intended to be used for the rather eerie and mysterious nebula sectors, but was removed because [[NightmareFuel it was considered TOO creepy]].
* Something similar happened in the development of ''VideoGame/Left4Dead2''. The animators wanted to find out what gunshot wounds looked like, the better to model what happens when the zombies get shot. So a database was compiled with many, many pictures of gunshot wounds to various parts of the body, caused by various pistols, rifles and shotguns. Armed with their new understanding of what happens when the human body gets shot, the animators decided not to include any of that in the game, because that much accuracy would have been entirely too disgusting.
* The [[OurElvesAreBetter Thalmor]] in ''VideoGame/TheElderScrollsVSkyrim'' can be on the receiving end of this. How do you weaken a rival empire? Simple. Find a disillusioned pawn on their side and encourage him to incite rebellion in their largest and wealthiest province. You want this war to drag on as long as humanly-... elvenly possible so the empire pours resources to try and put down the rebellion. However, you don't want the rebel forces to ''win'', because then you have to deal with an unpredictable, independent nation with [[ProudWarriorRaceGuy a strong warrior culture]], [[ScrewYouElves a proud history of slaughtering anything with pointy ears]], [[RoaringRampageOfRevenge and a serious grudge]]. Oh, and if some shouting, dragon-slaying PhysicalGod helps them kick the empire out, you have to deal with them as well. Equally, it's not in the Thalmor's interests for the Empire to quash the rebellion, either, as, [[VestigialEmpire fractured as it may be]], it's stronger with Skyrim than without, and would be better capable of launching a new offensive against the Thalmor with the Nord warriors on the front lines again. Of course, [[XanatosGambit the Thalmor are still in a strong position regardless of the outcome]], but, for them, the continued civil war is the most beneficial situation.
* In ''VideoGame/AWitchsTale'', Liddell wanted to find a powerful spellbook to become a great witch. She found the spell, but also unsealed the Eld Witch.
* In ''VideoGame/BeyondTwoSouls'', one team of researchers builds a machine that opens a portal into the [[SpiritWorld Infraworld]] to learn more about its nature and the creatures that inhabit it. It worked, but they didn't really think it through what would happen once the portal is open and things can freely pass through it. [[spoiler:A bunch of angry [[OurSpiritsAreDifferent entities]] came through and immediately killed almost everyone in the whole facility.]]
* The final mission of ''VideoGame/XCOMEnemyUnknown'' reveals that [[spoiler:the entire invasion, SortingAlgorithmOfEvil and all, was a ploy by the alien collective to uplift the humans into a species that is effective in combat, intelligent, and capable of using [[PsychicPowers the Gift]] and then assimilate them]]. Naturally, they got more than they bargained for.
* ''VideoGame/{{Syndicate}}'' features this in the backstory. The {{Mega Corp}}s ''did'' achieve [[OneNationUnderCopyright hegemonic status]]... but as it turns out subverted governments are even less effective at fighting crime than ordinary governments, allowing [[TheSyndicate criminal syndicates]] to grow and in turn take over the corporations.
* ''VideoGame/BatmanArkhamSeries'': The architect Cyrus Pinkney used a design style that was said to have the power to drive away evil. One of the buildings he designed was Arkham Asylum. Congratulations, Mr. Pinkney, you just made the most well-known CardboardPrison in all of fiction. [[InsaneTrollLogic Maybe putting the designs on the inside of the building would have worked better]]?
----
** Happens again in ''VideoGame/MetalGearRisingRevengeance'', when Sam and Monsoon attempt to break Raiden's mind by convincing that his "justice" motivation is to veil his bloodlust. They succeed, and cause Raiden to [[spoiler:reawaken his [[AxCrazy Jack the Ripper personality]], leaving them with a more formidable and now-psychopathic enemy to deal with]], leading directly to their undoing.
* The whole plot of ''VideoGame/TombRaider2013''. Lara and co. were on an expedition to find the lost Japanese kingdom of Yamatai, and they succeeded. Problem was, the island was inhabited by an insane cult that worshipped the long-undead [[HistoricalDomainCharacter Himiko]], whose [[WeatherManipulation power over the weather]] has resulted in constant storms that destroy all ships and aircraft and maroon anyone who comes across the area. By the end of the game, only four people in the original expedition, including Lara herself, are still ''alive'', with Lara in particular both [[CoveredWithScars physically]] and [[ThousandYardStare mentally]] scarred from the ordeal.
* It's hinted in ''VideoGame/PokemonRedAndBlue'' that Mewtwo was this here as well. It's only hinted at because the mansion with the information has been ransacked by Mewtwo, and only a couple of reports remain (in the anime, though, it was confirmed).
** Also, Teams Magma and Aqua in Ruby and Sapphire sought to use Groudon and Kyogre, respectively, to increase the available land or sea space. These Pokémon conjure bright light or rainstorms just by being out of their prisons, which threatens to completely eliminate their opposite element and doom the whole world. The opposing team leader gleefully lampshades this trope once the villainous team succeeds.
* Bass in the ''VideoGame/MegaManClassic'' series was created by Dr. Wily with the sole purpose of destroying Mega Man and proving himself the world's strongest robot, a goal that he indeed pursues relentlessly -- even if it means turning against his creator.
* Bass.EXE in ''VideoGame/MegaManBattleNetwork'' was designed to be a fully independent [=NetNavi=] with a unique ability to support him (Get Ability). This eventually resulted in him becoming one of the most powerful ''things'' online. In the manga, he's able to cause satellites to overload and explode just by entering them. To be fair, he was perfectly fine with working for humans...until [=SciLab=] ordered him killed for an accident that didn't actually involve him at all. He's been kinda [[KillAllHumans pissed]] since then.
* In ''BatenKaitos Origins'', we have [[spoiler:Sagi]], who was one of the subjects for [[spoiler:[[BigBad Baelheit]]'s experiment to make [[PersonOfMassDestruction aritificial spiriters]] by bonding pieces of Malpercio to human hearts]].
* ''VideoGame/{{Prototype}}'': [[spoiler:Alex Mercer]] was ordered by his superiors to create a stronger version of TheVirus. He succeeded. Then he decided to give it a little test drive. The official death toll was three million people in eighteen days. [[spoiler:Including himself. The "protagonist" Alex Mercer is simply his own corpse, reanimated by the virus he created. If anything, despite what it ''is'', the virus version of Alex Mercer is actually a ''better'' "man" than the real one, going so far as to find his creator's/his own actions - releasing the world's most virulent virus into downtown New York almost purely out of spite - disgusting. Also, on a more personal, emotional level, the virus Alex Mercer actually cares about his last relative, namely his sister, which the real Alex Mercer completely disregarded.]]
* ''Franchise/SonicTheHedgehog'':
** Shadow The Hedgehog. The government backed his creation by Gerald and it is implied they hoped he could be used as a weapon. He and Dr. Robotnik proceed to try and destroy the world. Black Doom was involved in this effort, apparently helping to imbue Shadow with the ability to locate Chaos Emeralds, so he could use them to invade Earth. What does Shadow do with the emeralds? Goes super and ruins everything Doom was planning.
** Nearly all of Eggman's Evil Plans in the 3D Sonic games fall under this:
*** In ''VideoGame/SonicAdventure'', Eggman releases [[SealedEvilInACan Chaos]] and increases its strength by giving it the Chaos Emeralds so it will destroy Station Square, allowing Eggman to build the foundations of his new empire. [[spoiler:He gets as far as the "destroying Station Square" part before he realizes that Perfect Chaos is too powerful to control.]]
*** In ''VideoGame/SonicAdventure2'', Eggman releases Shadow, who tells him that he can rule the world by taking control of a space station armed with a huge WaveMotionGun designed by Eggman's grandfather that's powered by the Chaos Emeralds. What Shadow ''doesn't'' tell Eggman is that [[spoiler:his grandfather wanted to destroy the world as vengeance for his granddaughter's death in a military raid, and placing all of the Emeralds in the cannon will activate a contingency program that [[ColonyDrop sets the station on a collision course with earth]].]]
*** In ''VideoGame/SonicHeroes'', Eggman plans to conquer the world with his fleet of airships, with [[spoiler:a new and improved Metal Sonic]] as the fleet's commander. [[spoiler:Eggman is quickly imprisoned on his own flagship, as Metal Sonic becomes too powerful to control]].
* The CorruptCorporateExecutive in ''VideoGame/SystemShock'' had The Hacker remove SHODAN's moral restrictions to make her an useful tool in his moneymaking schemes. Needless to say, she promptly became evil and decided ''he'' would make an useful tool in ''her'' [[TakeOverTheWorld schemes]].
** ''VideoGame/SystemShock2'' has this happen to SHODAN: one of her pet projects in the first game was engineering a new intelligent form of life. In the second game, they have thrived and evolved into the Many, the game's main antagonist. SHODAN clearly succeeded at making a superior intelligent lifeform... but the Many have also grown ''independent'' and are no longer under SHODAN's control. Oops.
* One of the main themes in the [=BioShock=] series.
** In ''VideoGame/{{BioShock|1}}'', Doctor Suchong was trying to figure out a way to get the Big Daddies to become super protective of the Little Sisters. When he slapped one of the Little Sisters that was pestering him while working, Suchong realized that he had succeeded when her Big Daddy brutally killed him.
** In ''VideoGame/BioShock2'', Sofia Lamb tries to make her daughter into the {{Ubermensch}} through education, psychological conditioning, and genetic engineering, starting the project even [[TykeBomb long before her birth]]. It was a total success, but rather than controlling her followers and spreading her ideology throughout the world, Eleanor went to work putting an end to the cult. Ironically, Eleanor ends up choosing Delta as her role model, and will emulate his sense of ethics completely, which is Sofia Lamb's ideal vision of a "utopian": someone who can follow her ideals much better than she can, and then evolve those ideals to the next level. [[spoiler:If Delta is ruthless against the Little Sisters, Eleanor will kill multiple Little Sisters in their sleep for power, and try to take over the world. If Delta spares the Little Sisters, Eleanor cures them and inspires them to perform herculean tasks together, EVEN WITHOUT THE SLUG EMBEDDED.]]
** In ''Videogame/BioshockInfinite'', Comstock plans on raising his daughter to become a holy warlord[[spoiler: and kill everyone on the face of the earth]]. In one BadFuture timeline, she succeeds at raiding New York, but by that time she's so far gone[[spoiler: that she plans on using her dimensional-hopping abilities to burn parallel worlds as well. Also, her sons have taken control of everything but themselves. Eventually the strain horrifies herself enough to use time travel, in order to find the one man who can change the past before she goes off the deep end.]]
* In the third ''SpyroTheDragon'' game, it's revealed that the Sorceress drove the dragons out of their homelands long ago so she could take over as the ruler. It worked perfectly... and then she discovered that without the dragons, there was no magic in that part of the world, so she was losing all her powers.
* In ''[[VideoGame/MetroidPrime Metroid Prime: Hunters]]'', this is Kanden's backstory. It's AllThereInTheManual, but he was created as the ultimate soldier. He's apparently biologically immortal, super strong, and has a massive ego, now out to prove that he's the best after he destroyed the lab that made him.
* ''VideoGame/JakIIRenegade'' has the main character as the subject of an experiment which gave the responsible parties exactly what they wanted, except for the fact that ''he escaped''. Now he's on the loose and wants revenge, which sucks for them (and [[VideogameCrueltyPotential anyone you accidentally or deliberately kill over the course of bringing them down]]). Hinted in the previous game as well. "I ''told'' you the Dark Eco would change you two!"
* ''Franchise/FinalFantasy'' has a lot of this.
** ''VideoGame/FinalFantasyVII'' has a classic example with Shinra's SOLDIER program. Their super-human part-alien monstrously strong star SOLDIER Sephiroth was so good at killing they couldn't stop him when he turned on them. [[note]]Although it is strongly implied that Hojo deliberately and knowingly sent Sephiroth on a mission that would inevitably cause him to revolt so he could further manipulate him into completing his research that would cause the destruction of the planet.[[/note]]
** In ''CrisisCore'' Genesis delivered a BreakingSpeech to Sephiroth with the intent of turning him against Shinra and toward his cause. It turned him against Shinra all right, but Genesis didn't count on Sephiroth declaring war on all of humanity because he blamed them for the downfall of the Cetra.
** ''VideoGame/FinalFantasyVI'' having much of the same plot, offers a similar example. Though the first succesful Magitek Knight infusion destroys the sanity of the subject, the result is by far the most efficient and capable servant of the Empire until he [[TheStarscream kills the Emperor]] and [[OmnicidalManiac destroys the world]] [[ForTheEvulz for kicks]].
** In ''VideoGame/FinalFantasyX2'' we find out that Vegnagun was built by Bevelle during the war against Zanarkand, and was intended to be an unstoppable superweapon. They overdid the "unstoppable" and were too scared to activate it, so instead they [[SealedEvilInACan buried it under the city]] and spent the next thousand years hoping nobody would switch it on by accident. Also, it was programed to automatically activated when someone planned to attack and stop the attack before it happened. It worked too well and now it could be activated by someone simply thinking about destroying it.
** Happens in ''VideoGame/FinalFantasyXII'' when [[spoiler:Judge Ghis attempts to figure out whether the Dawn Shard is real [[AppliedPhlebotinum deifacted nethicite]] by hooking it up to the Leviathan's engines. Yes, yes it is. The resulting explosion and complete destruction of the fleet results in some very pretty colors.]]
** ''VideoGame/FinalFantasyIX'' has this with Garland's creation of [[ArtificialHuman Kuja and Zidane]]. Both of them were created to exterminate all life on Gaia, Kuja being the SuperPrototype Garland created before he made what he considered the superior design. He was more GenreSavvy about this trope and realized Kuja might turn against him so he make sure he had a very short lifespan. Garland's fears proved completely justified as Kuja ultimately surpassed him, but knowing his {{Pride}}, Garland taunted him with how short his life was to push him over the DespairEventHorizon. It worked, but Kuja's reaction was far worse than he anticipated and he attempted to wipe out all life in the universe.
** In ''VideoGame/FinalFantasyXIII'', Lightning's purpose for creating her "Lightning" persona was to be able to care and provide for Serah after their parents died. This got her a high position in the Guardian Corps—and ended up alienating Serah because of her distant demeanour and hostility to her boyfriend Snow. A good deal of her CharacterDevelopment revolves around realizing how her persona is the cause of many of her problems.
** By the time ''VideoGame/LightningReturnsFinalFantasyXIII'' comes around, [[spoiler:Lightning trying to seal away the part of herself she views as "weakness" ends up creating Lumina, who repeatedly interferes with and antagonizes Lightning in her quest]].
* ''VideoGame/DeusEx'':
** The evil AncientConspiracy RenegadeSplinterFaction, [=MJ-12=] created an AI called Daedalus to police the Internet and crack down on any group that could threaten [=MJ-12=], which included all terrorist groups. Unfortunately for them, [=MJ-12=] itself fit all the criteria for a terrorist group, which caused Daedalus to go rogue and aid the protagonists.
** [[spoiler: Bob Page's]] plan to become a physical god by creating and merging with the Helios AI. [[spoiler: He creates Helios successfully, but Helios determines that JC would be a better fit for his plan]].
* ''VideoGame/{{Disgaea 3|AbsenceOfJustice}}'':
** Having glimpsed Mao's potential [[spoiler:when he reacts poorly to his father's death]], [[spoiler:Super Hero Aurum]] uses a combination of experiments, evil parenting techniques, and a GambitRoulette to grow Mao into the strongest Overlord ever. In the [[MultipleEndings bad ending]], we find that [[SuicidalCosmicTemperTantrum he was a little TOO successful...]]
** Mao himself falls victim of this trope when he steals the title of "Hero" for himself in an attempt to defeat his father, as he starts picking up heroic morals in addition to heroic attributes. This causes problems for Mao, since BadIsGoodAndGoodIsBad in the Netherworld.
* Most of the non-standard endings in ''VideoGame/{{Disgaea 4|A Promise Unforgotten}}'' are a result of Valvatorez failing to stop his opponents' plans from going horribly right and subsequently upsetting the balance of the universe. Heck, in one of the non-standard endings, [[spoiler: Valvatorez ends up hunted by everybody not allied with the Netherworld because he didn't stop beating things up]].
* ''Franchise/MassEffect'':
** Cerberus formerly ran a secret facility where they tortured biotic kids to create {{tykebomb}}s. Eventually, one of these, Subject Zero found a way to escape, though not before destroying everyone and everything she saw. Eventually she (now known as Jack) and Shepard go back to finish the job of destroying the facility.
** After Shepard died, Cerberus poured billions of credits into a project to bring him/her back to life more or less exactly as (s)he was. If Shepard wasn't the Cerberus type before, (s)he probably isn't won over by the Illusive Man's sales pitch, and at the end of the game makes it clear [[spoiler:(s)he'll never work for Cerberus, taking with him/her the ''Normandy'', its artificial intelligence EDI (who now has access to sensitive Cerberus data), and one of Cerberus' top operatives (who, ironically, argued for a control chip during the resurrection project) also follows him/her out the door.]] [[spoiler:Not only does the ''Normandy'' represent a significant investment of Cerberus resources, EDI's files reveal Cerberus doesn't actually have that many people directly working for it. If you've saved the crew, you've not only walked off with two of the organization's biggest investments (the ship and your rebuilt cyborg body), you've also taken a significant chunk of its active personnel who are now completely loyal only to ''you''.]] Shepard isn't known to be the type who quietly obeys all orders and let his/her superiors constantly throw crap at him/her. It was proven when Shepard [[spoiler: took the first Normandy and the whole crew with him/her]] to get to Ilos. If the player decides to, Shepard may literally tell the Illusive Man to "go to hell" and [[spoiler: blow the Collectors' base sky high.]] He/she does the exact thing he/she was brought back to life for - destroy the Collectors. Shepard just didn't do it in the way the Illusive Man would like.
*** Lampshaded by Joker in ''VideoGame/MassEffect3'', where he talks about how every single one of Cerberus's projects Went Horribly Right, "got loose, and started killing all their guys." Miranda and Jacob (both ex-Cerberus) protest that Shepard's resurrection was a successful project, to which Shepard replies "And then I cut ties, got loose, and started killing all their guys." [[SpaceshipGirl EDI]] raises the point that she too is a Cerberus project, but the counterpoint is not made that she too cut loose, co-opted a Cerberus infiltrator mech, and is now ''also'' killing all their guys.
** Pre-game example: In order to end the Krogan Rebellions, the salarians decided to cut down the krogans' violent and unstable population by sabotaging their birthrates with a [[DepopulationBomb biogenetic weapon]]... it worked exactly as planned. Until you realize that the salarians apparently didn't account for the krogans' still violent tendencies which ensure that a lot of them don't die from natural causes and which are further heightened by their species' impending demise (within the next 200 years). The krogan were only a problem in the first place because those same salarians armed them with space-age technology in an effort to fend off another alien menace altogether.
** Binary Helix Corp. wanted to clone an army of [[HordeOfAlienLocusts Rachni]]. They created a pretty big army...without giving themselves the capacity to control it. Or, more accurately, the method of control they ''tried'' to use (separating young Rachni from their Queen) proved ''exactly the wrong thing to do''. The Rachni are a HiveMind, and without the [[HiveQueen Queen]] guiding them, the young Rachni panicked and went irreversibly, ''violently'' insane.
** [[spoiler: Leviathans, an [[TimeAbyss unthinkably old]] and advanced aquatic race who dominated "lesser" races to collect tribute. When they noticed their thralls had a habit of building artificial intelligence that would inevitably destroy them, the Leviathans attempted to find a solution by building their own artificial intelligence, since tribute cannot be collected from the dead. They gave their own creation a command: ''preserve life at any cost''. After observing for some time, the intelligence concluded life as it ''was'' could not be prevented from going to war with their creations. It imposed its own stop-gap solution, which was capturing and enmeshing the star-faring races into gigantic, undying superstructures and then leaving non-star-faring life to advance undisturbed, hoping that one would emerge and produce a more permanent solution. For thousands of millions of years, over and over again, life advanced and came to the stars and went to war with its own creations, forcing the intelligence to enact its flawed solution, resetting the conditions to try again. The intelligence (unnamed but referred to as the Catalyst) still exists at the heart of its structures: within the Citadel and the Mass Relays. The preserved races, built in the image of the Leviathans, are now known as the Reapers. The Leviathans got exactly what they asked for; even they are still preserved within the superstructure of Harbinger, the oldest Reaper. They're no longer the apex race receiving worship and gifts from everyone else, of course, but they never specified they ''had'' to be.]]
* The Forerunners in the ''Franchise/{{Halo}}'' series. This happened during the Human-Forerunner war prior to the Halos being created. While incredibly advanced, the prehistoric humans couldn't match the Forerunner war machine. The Forerunners utterly crushed the Human Empire and literally bombed us back to the Stone Age. ''Then'' they realized that the humans were all that stood between the Flood and the Forerunners, and that they had disbanded their military after defeating the humans...
* ''VideoGame/TastyPlanet'': Scientists create ''GreyGoo'' designed to eat dirt for use as a cleaner. Indeed, it eats dirt. All the dirt. [[PlanetEater You think they noticed the planet we live on is named "Earth"...?]]
* ''Franchise/ResidentEvil'': Virtually every bioweapon the Umbrella Corporation made eventually became too strong to control and turned on its masters. You'd think they'd [[TooDumbToLive learn]].
** This includes [[spoiler:Albert Wesker himself]], who was created by Umbrella's first and grandest experiment: [[spoiler:to create a superior breed of humans.]] Unfortunately for the head of the experiment, Oswell Spencer, [[spoiler:Wesker]] also had an ego to go with the superiority [[spoiler: so there was no way in hell Wesker was going to worship Spencer especially since Spencer was a powerless and feeble old man when the truth was uncovered.]]
** It might, however, be more accurate to say Umbrella's work environment is mostly just very dangerous for the employees. Umbrella as a whole just shrugs off the casualties while reaping the benefits of the research, and they get by just fine. At least until [[spoiler:their shady dealings get exposed to the public.]]
* In the third ''VideoGame/MasterOfOrion'' game, the Harvester Project was an attempt by the Antarans to create a sentient bioweapon that could kill any species. [[TurnedAgainstTheirMasters It started with them]]. To add insult to injury, [[AllThereInTheManual the game's backstory]] makes it clear that it was Harvester Gamma that wiped them out; Harvester ''Beta'' is the sentient bioweapon that one of their own unleashed out of ''spite'', and is a playable race.
* In ''VideoGame/KnightsOfTheOldRepublic'', assassin droid HK-47 proves too effective when his master, a Systech Corp manager, orders him to kill all members of a rival company in order to facilitate the man's rapid promotion. Sadly, the rival company proves to simply be an offshoot of Systech Corp. HK-47 carries out his orders to the letter, and the manager ends up accidentally electrocuting himself trying to stop him. [[spoiler:This causes HK-47 to shut down because he accidentally violated his programming restriction against killing his own master. Apparently, this happens to HK-47 with alarming frequency.]]
* A much grimmer example occurs in ''VideoGame/KnightsOfTheOldRepublic II''. After the war, some unknown force is hunting down and killing Jedi, so they call a conclave on Katarr to find out what it is. Turns out to be Darth Nihilus, who arrives and consumes the life force on the ''entire planet'', which reduces the Jedi Order to single digits. [[spoiler:In fact, the conclave was Atris' idea. She leaked the news of the gathering and stayed away so she could observe. After that, she started calling herself the "Last of the Jedi."]]
* Another ''Franchise/StarWars'' example. According to ''VideoGame/TheForceUnleashed'', the wholle Rebellion thing was instigated by [[spoiler: Vader as an attempt to uncover the Emperor's enemies]]. Before that, opposition to the Empire was a scattered group of resistance groups that often didn't get along with each other, let alone work together on any kind of coherent plan. NiceJobFixingItVillain, indeed.
** Actually, from a more wide perspective, by creating the only force that could stop the empire [[spoiler: twice, both with the rebellion plan and in the literal sense, by fathering Luke and Leia]], he accomplished his original task:[[spoiler: to destroy one of the worst enemy of the Jedi Order]]. He just took the long path...
* The ''VideoGame/ChzoMythos'' series ends with [[spoiler:Chzo getting exactly what it wants... which, it turns out, everyone else in every game has been drastically misinterpreting from the beginning.]]
* In ''VideoGame/TheDig'', the {{Precursors}} native to the Ghost World that the protagonists find themselves transported to found a way to AscendToAHigherPlaneOfExistence. They found out too late that [[WhoWantsToLiveForever living forever in a void without physical sensation sucks]], and they had no way to get back.
* In ''VideoGame/RType'', 26th Century humanity created a super-bio-weapon called the Bydo to be an unstoppable force of destruction. Well...[[TurnedAgainstTheirMasters they certainly succeeded in that]], to their regret.
* In the back story of the ''ThunderForce'' series, the human race creates a self-thinking super computer called ORN. The computer was meant to take care of all their human needs and provide military protection. However, ORN turns on the human race and decides to destroy all of them using advance technology it created with its self-thinking CPU, until an entire empire of drones is created.
* In ''VideoGame/{{Starcraft}}'', the Confederacy developed special devices called Psi Emitters to lure HordeOfAlienLocusts to rebelling worlds. They worked perfectly...on the Confederacy capital world, courtesy of the protagonists.
** In the original backstory to the games, the Xel'naga were destroyed as a result of their attempts to create a [[PureIsNotGood race with "purity of essence"]]. They took a race of harmless worms and turned them into hive-minded parasites with a single-minded devotion to destroying other species while absorbing their genetic potential. When they run out of species on their homeworld to destroy and assimilate, their first targets are {{Space Whale}}s that give them the ability of interplanetary and interstellar flight. Their second targets were the Xel'naga, who are still in orbit around the Zerg homeworld. [[spoiler:''VideoGame/StarCraftIIHeartOfTheSwarm'' {{retcon}}s this; the Zerg turning on the Xel'naga was the work of a rogue Xel'naga named Amon, and therefore no longer an example of this trope.]]
* This is the backstory of the [[spoiler:Eclipse Tower]] in ''VideoGame/GoldenSun: [[VideoGame/GoldenSunDarkDawn Dark Dawn]]''. [[spoiler: The precursor races made the tower to gather and use light energy, not realizing that by gathering and using all the light energy it would create places of increased darkness, which spawned superpowered monsters, endangering people everywhere. The Apollo Lens was built and used to focus light from other sources to forcibly shut down the Eclipse Tower, and the means to use both were hidden away, never again to be used...]] until the events of the game, of course.
** The people of ancient Weyard in ''VideoGame/GoldenSun'' sealed the power of alchemy when people misused its powers for wars and other bad things. By sealing alchemy away, the wise sages believed this would bring back peace to the world and it had done exactly that for the most part. [[spoiler: However, sealing alchemy created a huge side effect on the world. Without alchemy flowing into the world, not only did civilizations devolve into simple towns and villages with primitive tools and technology over time, but the world itself started to shrink into itself and became a FlatWorld that was getting smaller as the void was eating it away. This isn't realized until the second game, learned by Felix's party and then told to Isaac's party, who did not know at first.]]
* In the ''VideoGame/{{Fallout}}'' series:
** Most of the Vaults -- which were ''not'' underground bunkers designed to protect the citizenry but instead mass-scale experiments designed to evaluate their suitability for post-war survival and possibly space-travel on generation interstellar ships (read: torture them sadistically in a variety of psychological and physiological ways) have, by the time the player character stumbles upon them, have either GoneHorriblyWrong or have Gone Horribly Right instead. In either case, the result usually sees the player character find a ''lot'' of skeletal corpses lying around.
*** Vault 92: The aim of the experiment was to subject every inhabitant with extremely low frequency white noise that eventually sent then into a trance-like state. In this state, the subject is extremely vulnerable to outside verbal suggestion and they always followed through with their orders on the subconscious level (like scratching their nose or fixing their hair). What the project lead didn't know was that the Overseer subjected everyone to white noise via the PA system and implanted combat suggestions prescribed by Vault-Tec; the project lead confronted the Overseer about it and [[HeKnowsTooMuch got killed for knowing too much]]. The subjects eventually lapsed into a [[OmnicidalManiac berserker rage where they killed anyone they saw in the most brutal and savage way possible]], [[ImplacableMan taking over 20 bullets before going down]]. Prepared for this eventuality, the Overseer implanted a verbal command that restrained them: "[[ShoutOut Sanity]] [[Literature/NineteenEightyFour is not statistical]]." Eventually, that stopped working, and the vault was ruined.
*** Vault 11: The Vault computer announced it would start the self destruct unless the population [[SacrificialLamb sent one person a year to be sacrificed]]. The self destruct threat was actually a lie, as the experiment was to determine how psychologically pliable a population could be (and to [[HumansAreTheRealMonsters what extremes they'd go to save themselves]]) in an impending doom situation. The last (four out of) five people alive after everyone else was killed in a civil war, incited by a malicious subversion of the election system the vault had adopted to chose their sacrifices, ended up committing suicide out of pure shame after not standing up to the Vault computer sooner. Nobody had to die. But then [[Webcomic/PennyArcade the vaults were never meant to save anyone.]]
** In ''VideoGame/{{Fallout 2}}'' an Enclave scientist explains how he genetically engineered intelligent animals to be used in combat. At first he thought he had failed, until he discovered that their wild animal behavior was merely ObfuscatingStupidity and that they were capable of reasoning and human speech. He cites the fact that they were intelligent enough to intentionally hide their intelligence as evidence they were too dangerous and needed to be killed.
* In the back-story of ''VideoGame/{{Sacrifice}}'', main character Eldred summoned a demon in an attempt to keep the empire he was stewarding together. He got an extremely powerful one, called Marduk, and tasked him to destroy his rivals. Marduk obliged... [[OmnicidalManiac but didn't stop at the rivals]]. [[spoiler:Stratos]] ends up repeating the same whopper by summoning Marduk to the world the game is set in to destroy the other four gods -- like Eldred, [[spoiler:Stratos]] eventually finds out that, while Marduk will do the job you ask of him to the letter, eventually it all boils down to the fact that his true agenda is ''destruction of reality itself''.
* ''VideoGame/DeadSpace2'' - [=EarthGov=] conducts experiments trying to [[spoiler:re-create the Marker]], so they can use it as a power source. They are successful... at which point it drives everyone on the space station insane and turns them into Necromorphs. ''Dead Space 3'' implies that, over the next few years, this ''kept happening'' all over human civilization.
* Arguably GLaDOS in ''VideoGame/{{Portal}}''. Aperture Science likely wanted to develop an AI that was as [[ForScience committed to science]] as they were. They succeeded. Unfortunately for them, GLaDOS also embodied the company's [[MadScientist complete lack of morals or ethics]] and promptly killed them all so they wouldn't get in the way.
** ''VideoGame/{{Portal 2}}'' confirms it. [[spoiler:[=GLaDOS=]'s body is designed so whichever AI uses it gets an "itch" to [[DeathCourse test]] and feels [[DoesThisRemindYouOfAnything intense euphoria]] upon completing a test. Thing is, like real drugs, AIs on the system develop tolerance and need to do more and more elaborate tests to get the high, as demonstrated by Wheatly throughout Chapter 8. GLaDOS was actually the most stable AI for testing because she didn't need the stimulation: "I was in it [[ForScience for the science]]. Him, though..."]]
** Also, Wheatley was created to be a huge idiot intended on dumbing down the AI system as a whole. To say they succeeded at this goal would be a huge understatement. [[spoiler:One suspects, though, that no one expected Wheatly to actually be put ''in charge''.]]
** The Repulsion and Propulsion Gels in ''Portal 2'' were originally designed as dietary aids; they ended up bouncing the food out of a person's stomach or sending it through so fast that there was no time to digest it, meaning the test subjects all starved. [[FridgeLogic One wonders how that works]] when the gels were all shown to be water-soluble.
** Chell is a horribly effective test subject. She's given a portal device and told to escape test chambers. Then she escapes a chamber that isn't supposed to have an exit. ''Lab Rat'' reveals that she was purposefully ''removed'' from the list of possible test subjects because her preliminary testing showed her to be an extreme outlier for [[TheDeterminator sheer tenacity]], thus making her potentially dangerous if ever put into a testing environment. After [=GLaDOS=]'s rebellion, Ratman decided to rig the deck by putting Chell's name back on and at the top of the list.
* Paxton Fettel from [[VideoGame/FirstEncounterAssaultRecon F.E.A.R.]] His creators wanted the ultimate psychic commander, which they got; unfortunately they neglected to consider what would happen should Fettel discover what had been done to his mother. When he did, he proved to be far more effective than his creators ever intended.
* The [[spoiler:ZODIAC Ophiuchus]] from ''VideoGame/RefleX'' was programmed to search and destroy [[spoiler:the other ZODIAC]]'s no matter what [[DestructiveSaviour and it went along and did exactly that]].
** In ''VideoGame/AlltynexSecond'', the Senate ruling humanity [[spoiler:wanted to cull the human population to make them easier to rule. They therefore induced an extremely powerful supercomputer, the eponymous ALLTYNEX, to "go rogue" and cause a bunch of destruction.]] Within 72 hours, 85% of the human race was dead and the survivors were forced to flee Earth entirely, which was, to put it lightly, not as planned.
* ''VideoGame/HeroesOfMightAndMagic III'' features [[spoiler:Deyja using dark magic to revive the dead King Gryphonheart as a lich to serve them. Turns out that the late King, even as a lich, is too BadAss for their liking, forcing them to [[EnemyMine forge a temporary alliance with Erathia]].]]
* The Bronze and Infinite dragonflights in ''VideoGame/WorldOfWarcraft'' fall prey to this a few times. The infinite dragonflight goes back in time to change the future for their own purposes. They DO change the future...but only by alerting their mortal enemies (bronze flight) to their existence.
** Bronze leader Nozdormu spends ages looking into timelines to figure out why he ends up as leader of the infinite dragonflight. His disappearance is hinted to have actually been the REASON some dragons started agreeing with the Infinite school of thought...which, it turns out, is a stable timeloop. Nozdormu came back, knowing he is the leader of the infinite flight, and that all his attempts to subvert his destiny will actually result in him becoming what he hates most. At least, until Kairoz and his paradox-eliminating time machine...
* PlayedForLaughs in ''VideoGame/ManaKhemiaAlchemistsOfAlrevis''. Roxis is experiencing exhaustion from all his studies, and Jess volunteers to cook up a medicine for him. Considering Jess' [[LethalChef track record]], Roxis wisely tries to get out of the situation, but Jess manages to feed him her concoction anyway. Surprising everyone present, Jess' tonic actually reinvigorates Roxis, removing his fatigue entirely...an effect that lasted for ''an entire week'', leaving him ''more'' exhausted than when he started.
* In ''VideoGame/{{Xenoblade}}'', a man by the name of Klaus once tried performing scientific experiments to create a new universe, with himself as a god. Doing so destroyed the one he was living in at the time, and all its inhabitants with it.
** The worst part being: it did work: [[spoiler:Klaus '''did''' become one of the gods of the new universe, in which he created sentient human-like lifeforms out of boredom and loneliness, and repeatedly slaughtered them every time they became too autonomous before recreating sentient life again in a never ending ViciousCycle]].
** If the {{Fanon}} that all the ''Xeno'' games are in the same continuity is true, ''{{VideoGame/Xenoblade}}'' retroactively turns the ending of ''VideoGame/XenoSaga'' into this. [[spoiler:Shion and her friends defeated Wilhelm and destroyed his Zarathustra machine that was causing their universe to experience a cycle of Eternal Recurrence, constantly dying and coming back exactly the same, only for it to get blown up a completely different way and replaced with an entirely new universe.]]
* If custom content counts, [[http://www.youtube.com/watch?v=-nMnJGq-gNM this]] is an attempt to replicate the Weeping Angels of ''Series/DoctorWho'' in GarrysMod. To sum it up, the Weeping Angels are monsters whose only purpose is to play a fatal game of Grandmother's Footsteps with our heroes, and the Gmod one does it a little TOO well.
* All of the specimens in ''VideoGame/KillingFloor'' are like this, but the Crawler's bio specifically invokes this trope.
--> ''“The Crawler. Interesting attempt to merge human and arachnid genes. Sort-of worked, too - these little nasties have a habit of appearing in all sorts of strange places!”''
* In ''VideoGame/GodOfWar'', Ares wanted to make Kratos a great warrior [[spoiler:in his bid to conquer Olympus]]. First he gained his loyalty through a DealWithTheDevil. Then he gave him the powerful Blades of Chaos. [[spoiler:Then he tricked Kratos into killing his wife and child because they were all that was holding him back from being the perfect murder machine. That turned out to be the downfall of Ares, as he'd trained Kratos a little too well. Kratos even acknowledges this during the boss battle with Ares]].
-->'''Ares:''' That day... I was trying to make you a great warrior!\\
'''Kratos:''' You succeeded. (runs Ares through with the Sword of the Gods, killing him)
* ''VideoGame/NaziZombies'': In ''Black Ops 2'' zombies, you have a choice between helping [[BigGood Dr. Maxis]] and [[BigBad Dr. Richtofen]]. [[spoiler: Knowing what Edward did, you'd think that helping Maxis was the better choice, right? Wrong! He stops Richtofen, [[TheEndOfTheWorldAsWeKnowIt but causes the end of the world anyway]]. [[NecessarilyEvil He's not too happy about it either.]]]]
* Happens in the beginning of ''VideoGame/HalfLife1''. The scientists use their giant ambiguously-defined science machine on an extremely pure sample of [[AppliedPhlebotinum phlebotinum]]; so pure, in fact, that the machine overloads and allows armies of aliens to start teleporting into our dimension.
* You can make this happen in the final case of the second ''VisualNovel/PhoenixWright'' game. The case's ultimate mastermind [[spoiler: and your client [[ObfuscatingStupidity Matt]] [[SmugSnake Engarde]] has orchestrated a massive scheme to have his longtime rival killed by an assassin and to force Phoenix into helping get him off scott free by blackmailing said assassin into threatening Phoenix's assisstant Maya. Eventually you can prove to the assassin that he was being set up by Engarde, who tells Matt that he will be his next target if he is set free. You can choose to make this trope true by choosing a Not Guilty verdict, in which Engarde breaks down and confesses on the stand to avoid being killed.]]
* A variation of this happens in ''VisualNovel/PhoenixWrightAceAttorney: Trials And Tribulations''. Phoenix successfully manages to give a thorough defense of Ron Delite, on the charges of stealing a sacred urn, proving that someone else is the culprit complete with that person confessing, and showing that Ron has a watertight alibi at the time of the theft. Ron is found not guilty and everything is going smoothly...until it's revealed that a man was murdered in the exact same place that Phoenix just proved Ron was at. Even worse, the time of death was the exact same time that Phoenix proved Ron went there. The airtight alibi Phoenix used to get Ron a not guilty verdict as a thief, is now gonna get him executed for a murder he never committed. Well done, Phoenix. Good freaking job.
* ''VideoGame/{{Mother 3}}'' has one terrifying example near the end of the game. After you defeat [[spoiler:Porky, he retreats in his Absolutely Safe Capsule. Said capsule is designed to be ''completely'' impervious to damage, but there's one catch: once you enter it, you can't leave. And since Porky has been rendered more or less immortal due to abusing TimeTravel, [[AndIMustScream he is stuck permanently inside the capsule, in absolute safety, for eternity]]]].
* The Kyranians of VideoGame/AvencastRiseOfTheMage went looking for [[DemonLordsAndArchdevils Morgath's]] heart to secure immortality for their entire race. They found him and were slaughtered for it.
* ''VideoGame/FTLFasterThanLight'' has a meta example: The CutSong [[http://benprunty.bandcamp.com/track/bonus-horror "Horror"]] was originally intended to be used for the rather eerie and mysterious nebula sectors, but was removed because [[NightmareFuel it was considered TOO creepy]].
* Something similar happened in the development of ''VideoGame/Left4Dead2''. The animators wanted to find out what gunshot wounds looked like, the better to model what happens when the zombies get shot. So a database was compiled with many, many pictures of gunshot wounds to various parts of the body, caused by various pistols, rifles and shotguns. Armed with their new understanding of what happens when the human body gets shot, the animators decided not to include any of that in the game, because that much accuracy would have been entirely too disgusting.
* The [[OurElvesAreBetter Thalmor]] in ''VideoGame/TheElderScrollsVSkyrim'' can be on the receiving end of this. How do you weaken a rival empire? Simple. Find a disillusioned pawn on their side and encourage him to incite rebellion in their largest and wealthiest province. You want this war to drag on as long as humanly-... elvenly possible so the empire pours resources to try and put down the rebellion. However, you don't want the rebel forces to ''win'', because then you have to deal with an unpredictable, independent nation with [[ProudWarriorRaceGuy a strong warrior culture]], [[ScrewYouElves a proud history of slaughtering anything with pointy ears]], [[RoaringRampageOfRevenge and a serious grudge]]. Oh, and if some shouting, dragon-slaying PhysicalGod helps them kick the empire out, you have to deal with them as well. Equally, it's not in the Thalmor's interests for the Empire to quash the rebellion, either, as, [[VestigialEmpire fractured as it may be]], it's stronger with Skyrim than without, and would be better capable of launching a new offensive against the Thalmor with the Nord warriors on the front lines again. Of course, [[XanatosGambit the Thalmor are still in a strong position regardless of the outcome]], but, for them, the continued civil war is the most beneficial situation.
* In ''VideoGame/AWitchsTale'', Liddell wanted to find a powerful spellbook to become a great witch. She found the spell, but also unsealed the Eld Witch.
* In ''VideoGame/BeyondTwoSouls'', one team of researchers builds a machine that opens a portal into the [[SpiritWorld Infraworld]] to learn more about its nature and the creatures that inhabit it. It worked, but they didn't really think it through what would happen once the portal is open and things can freely pass through it. [[spoiler:A bunch of angry [[OurSpiritsAreDifferent entities]] came through and immediately killed almost everyone in the whole facility.]]
* The final mission of ''VideoGame/XCOMEnemyUnknown'' reveals that [[spoiler:the entire invasion, SortingAlgorithmOfEvil and all, was a ploy by the alien collective to uplift the humans into a species that is effective in combat, intelligent, and capable of using [[PsychicPowers the Gift]] and then assimilate them]]. Naturally, they got more than they bargained for.
* ''VideoGame/{{Syndicate}}'' features this in the backstory. The {{Mega Corp}}s ''did'' achieve [[OneNationUnderCopyright hegemonic status]]... but as it turns out subverted governments are even less effective at fighting crime than ordinary governments, allowing [[TheSyndicate criminal syndicates]] to grow and in turn take over the corporations.
* ''VideoGame/BatmanArkhamSeries'': The architect Cyrus Pinkney used a design style that was said to have the power to drive away evil. One of the buildings he designed was Arkham Asylum. Congratulations, Mr. Pinkney, you just made the most well-known CardboardPrison in all of fiction. [[InsaneTrollLogic Maybe putting the designs on the inside of the building would have worked better]]?
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