History VideoGame / AstroBoyOmegaFactor

** Nuka combines elements from her original 80s anime incarnation as well as ''Prime Rose'''s Death Mask, Bem from the original series' ''Earth's Last Day'' storyline (humanoid control system for a weapon of mass destruction) and Mitchy &/or Tima from ''Anime/{{Metropolis}}'' (created on Duke Red's orders using the power of Omotanium, plugged into a machine that can affect the sun).

* AbsenteeActor: The game includes as many characters as it can, even if only for minor cameos, but Gourdski and Spider, the two doodles Tezuka loved to use [[RecurringExtra for cheap gags]], have no cameos in the game. Tezuka's avatar doesn't show up, either.

* LoadsAndLoadsOfCharacters: This game includes many, many, many characters from Creator/OsamuTezuka's many works. Whenever Astro meets one he [[LevelUp gets to boost one of his stats.]]

* PragmaticAdaptation: The original "Black Looks" crooks in the ''Astro Boy'' manga wore masks that looked like odd BlackFace creatures. This version where they work for Deadcross simply shows them with regular human faces hidden by their hats casting some shadow. Their character sheet even specifies that their mask was redesigned for this game.

* PhlebotinumBomb: The Death Mask is capable of firing Omotanium-powered beams that destroy electronic components. It uses this to [[spoiler:exterminate all robots on Earth during the fist ending. This beam is an instant kill during the second fight against Sharaku]].

* TheHeroDies: [[spoiler: Astro dies in the first ending as a victim of Death Mask. Fortunately, for him, he's resurrected]]

* RobotWar: During the five years he was absent due to traveling to the past, the robots declared wars on humans, principally due to avenge Rag's assassination, which resulted in 80% of the earth being destroyed.

* TheHeroDies: [[Spoiler: Astro dies in the first ending as a victim of Death Mask. Fortunately, for him, he's resurrected]]

* TimeTravel: The main element of the second half of the game. Astro needs to travel through time to figure out how to save the world and who the mastermind behind the war is.
** in the first ending, Sharaku confesses to Astro that he's one who has already destroyed many timelines due to his vile actions forcing Death Mask to kill all remaining robot live, before abandoning him by travelling to another timeline where he couldn't be affected.

* YouKeepUsingThatWord: In the original series, the function of "Omega Factor" is a ''bad thing'', actually a hazardous device which gives an evil mind to a robot or even deprives it from its mind. The power-up that Astro is using is called "Kokoro" (Heart) in Japanese, which is the opposite.

* MistreatmentInducedBetrayal: Rag used to be Rock's substitute in his presidential meetings until he became tired of being used as his puppet and got ordered to shut ut when he began to questions his anti-robotic policies.

* SealedEvilInACan: In the post-credits scene, Wato discovers Sharaku and covers his third eye with a bandage, anulating his evil powers.

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In terms of gameplay, this is a BeatEmUp where Astro can jump and air dash ([[InvulnerableAttack he's invincible while dashing.]]) Astro has a basic punch combo, although he may freely [[PunchedAcrossTheRoom kick enemies away]] or [[FingerGun fire a finger laser]].) He also has access to three special attacks that he can build energy for.

* [[WaveMotionGun The Arm Cannon]], easily the strongest weapon but leaves Astro wide open to attacks from behind.
* [[MoreDakka The Machine Guns]] mounted on his lower backside will clear the screen of all projectiles and temporarily [[SmartBomb stun all enemies]] but is the weakest.

Despite excellent reviews, this game was mostly passed over for the Playstation 2 game developed by Sonic Team and this fell into obscurity. Those who did play the game though [[CultClassic loved it.]] The ''Astro Boy'' game for the UsefulNotes/NintendoDS based on the American CGI film is inspired by this one, but unfortunately it is widely considered to be inferior in every aspect.

* AbsenteeActor: The game includes as many characters as it can even if only for minor cameos, but Gourdski and Spider, the two doodles Tezuka loved to use [[RecurringExtra for cheap gags]], have no cameos in the game. Tezuka's avatar doesn't show up, either.

* BadFuture: After a time travel adventure, [[spoiler: Astro Boy returns five years late to a world where the Robot War has left earth scorched and uninhabitable. His attempts to fight for justice in this environment are too little too late. On later cycles he narrows the error level down to a more manageable 3 months.]]

* DoNotAdjustYourSet: [[spoiler: Drake broadcasts his message to Nuka, ordering her to initiate the Death Mask and obliterate all robot-kind so her father won't die, on all world channels.]]
* DownerEnding: [[spoiler: The first playthrough ends with Death Mask killing Astro and all other robots on Earth. Fortunately, after this, the player is given the ability to shoot for a far less depressing ending.]]

* FinalBoss: [[spoiler:Garon, a giant composed of "living metal" that is being controlled by Pook under Sharaku's orders]].
* {{Foreshadowing}}: Kin Sankaku and Skunk found Pook while digging for the secret treasure of Mu. At the end of the game, it's revealed that [[spoiler: he IS a part of the secret treasure of Mu - Garon.]]

* GrotesqueCute: [[spoiler: Nuka while in Death Mask form. A disturbing face-shaped ship with her usual sweet personality.]]

** Kennedy will only tell you the whereabouts of Dr. Black Jack after you [[spoiler: beat Blue Knight in the Antarctic duel, drive Sharaku off Fire Vase Island, and fight Atlas once more after hearing Drake's motive]].

* NintendoHard: As in other Treasure games, you get a nice overpowered moveset but the enemies are relentless. On Hard, enemies will tear about half of your HP with the lightest of attacks, you can have only 3 Supers and there are MANY things that can kill you in a single hit. What's worse is that there are very few recovery items in each chapter and some of them are supposed to be the level ups that only work once.

* OffscreenStartBonus: [[spoiler:Kennedy, Unico and Mars]] are just off-screen when you start certain areas.
* OneHitKill: Many enemies and most bosses in Hard Mode can defeat Astro in ine hit. Even in Normal mode, the giant roboid in stage 0-3 will kill you with one strike.

* RPGElements: Understanding a character's personality lets Astro unlock some of his true potential - health, attack power, number of times he can dash and how good his super senses are.
* SanitySlippage: Drake suffered this bigtime after he was led to believe his daughter had been killed by a robot while awaiting treatment for a highly fatal disease. He only gets worse after Astro confronts him with this fact, and is willing to murder Duke Red ''along with himself'' in order to enact revenge on all robotkind for his loss.
%%** The Blue Knight is clearly suffering from this as well; It becomes evident as to why once we learn his real identity.

* SwordOfDamocles: [[spoiler: Death Mask]] was created to be this, in order to prevent robots from destroying humanity. This is why it is the biggest obstacle to Sharaku's plan to [[spoiler:conquer the world by instigating a robotic uprising.]]

* VideoGameTutorial: It's skippable but if you do then you actually miss out on an Omega Factor upgrade at the end.

* WhamShot: The appearance of Death Mask, who then proceeds to [[spoiler:''destroy Astro and all robots on Earth''. Just when it seems that all is lost, you are given a second chance by the Phoenix.]]

* ActuallyIAmHim: [[spoiler:Shadow is Sharaku and Blue Knight is the ex-president Rag who was thought to be dead, er, destroyed.]]

* AirJousting: The battle with Blue Knight.
* {{Atlantis}}: Mu, pretty much. [[spoiler:Rock]] remains in the past to try to save it, but it isn't shown if he succeeded in changing anything.
* BackFromTheDead: [[spoiler:Astro]] at the end of both loops, revived by Phoenix. [[spoiler: Nuka too.]]
* BadassAdorable: Astro, Denkou, Pook and the list goes on...

* BigBad: Sharaku Hosuke.

* BoringButPractical: The spin kick that ends a combo and blows most enemies away can be used anytime and the super moves that stun or severely damage all enemies on screen are often very spammable, ''so why is the game any difficult?'' Those moves are combo enders, so you'll end up instinctively using them only that way to build up full combos and rack more points [[DifficultButAwesome despite the risks]].
* BossBonanza: World's Strongest Robots.
* BossRush: World's Strongest Robots and World's Greatest Adventure.

* BullfightBoss: With the Blue Knight.
* ButtCannon: Astro Boy's butt doubles as a SmartBomb.

** A word of advice: if you're playing on Hard Mode, don't bother upgrading your health more than one or two times. Instead, upgrade your Punch and Laser abilities first, so you can beat enemies more effectively. Having Level 4 or 5 Jets to avoid attacks better is also crucial; without decent-level Jets, Atlas and Sharaku are nigh impossible to beat. Once you've maxed out those three abilities, ''then'' you should work on maxing out everything else.
* CharacterDevelopment: Atlas, though this can be seen as "re-development".
* ChargedAttack: Astro's beam cannon, which conveniently freezes time while charging.
* ColorCodedForYourConvenience: You can tell the properties of each enemy by their color. Most importantly, Blue enemies fire projectiles and Red enemies have all attacks of their kind on top of not flinching to any attack but the machine gun.

* CompositeCharacter: ''De rigueur'' for ''Astro Boy'' adaptations.

* CuteBruiser: Astro and Pook, the transforming robot.
* DefeatMeansFriendship: Blue Knight and the world's strongest robots on the timeline where they do not [[DefeatEqualsExplosion explode by Astro's fist]].

* FinalBoss: [[spoiler:Garon controlled by Pook]].

* GrimyWater: Only at some points of the 2nd Stage and it seems to be normal water.

* IAmAMonster: [[Administrivia/TropesAreTools In a very bad way.]] Atlas describes himself as one in Birth.

* ItsAllMyFault: After having his true self reawakened, Atlas takes full responsibility for Prime Rose's disappearance, even offering his life to Drake. Instead, Drake abandons his hatred for robots and asks Atlas to watch over his daughter.

* MultiMookMelee: So much the game lags A LOT because of it.

* NewGamePlus: [[spoiler:Literally. The entire second half of the game is reached after beating it once.]]

* NintendoHard: As in other Treasure games, you get a nice overpowered moveset but the enemies are relentless. On Easy you begin each life with, ridiculously, 30 Super attacks and can stock up to 99 of them and enemies deal very low damage. On Hard? Nightmare. Enemies will tear about half of your HP with the lightest of attacks, you can have only 3 Supers now and there are MANY things that can kill you in a single hit. Let's state that we are not talking about bottomless pits or death spikes. Rebirth Mode is tough on ''any'' difficulty. What's worse is that there barely are any recovery items in each chapter and some of them are supposed to be the level ups that only work once.

* ObviouslyEvil: Drake. EvilMustache? Check. FourEyesZeroSoul? Check. NamesToRunAwayFromReallyFast? Double check. [[DarkAndTroubledPast He wasn't always as bad as all that though, as we later find out...]]
* OffscreenStartBonus: [[spoiler:Kennedy, Unico and Mars]] are both just off-screen when you start certain areas.
* OneHitKill: Many enemies and most bosses in Hard Mode are this. Even in Normal mode, the giant roboid in stage 0-3 will kill you with one strike.
* PaletteSwap: The games does this with every single mook and even some mid/mini-bosses.

** Although technically not a President, Councilor Drake also counts.
* ReasonableAuthorityFigure: Duke Red as the International Councilor. It becomes darkly ironic that he, a champion for the rights of robotkind is also the man responsible for the creation of the Death Mask in the event of a robotic uprising against humanity.
** Dr. O'Shay also counts, being a far more rational and understanding man than his disillusioned predecessor, Dr. Tenma.
* RobotWar: Who's winning depends on the timeline.

** The Blue Knight is clearly suffering from this as well; It becomes evident as to why once we learn his real identity.

* ShockingSwerve: The second half of the game is loaded with these, given the aforementioned ResetButton granted by the Phoenix. Of particular note is the surprise appearance of Drake as Duke Red's successor, Rock becoming President of Antarctica in Rag's place, among others.

** References to ''VideoGame/GunstarHeroes'' are also present: the background in one level features buildings that have signs reading "'''Gunstar'''", Pook refers to his different forms as "Forces" (similar to the ''Gunstar Heroes'' boss Seven Force), Astro's six main stats plus the Omega Factor are called "The Seven Forces", and the ending theme is a slightly slower version of ''Gunstar Heroes'''s ending theme.

* ShownTheirWork: We did say ''every'' character Tezuka ever did, right? The unlockable Character List gives descriptions of all the characters and explains how they were adapted into the game.
* SparedByTheAdaptation: Several examples thanks to the time loop. Notable examples include characters such as [[spoiler:Pluto and even Nuka!]]
* SolarCPR: [[spoiler:After the battle with the game's TrueFinalBoss, remains of it end up corrupting the sun. Astro has to send over a remnant of Death Mask/Nuka in order to restore it.]]
* StealthMentor: [[spoiler:Dr. Tenma's ultimate goal is to get Astro to become stronger by overcoming adversity.]]
* SwordOfDamocles: [[spoiler: Death Mask]] was created to be this, in order to prevent robots from destroying humanity. This is why it is the biggest obstacle to Shraku's plan to [[spoiler: conquer the world by instigating a robotic uprising.]]

* TalkToEveryone: In the second half of the game you'll need to do this. [[GuideDangIt You're bound to need a guide]].

* TimeTravel: The main element of the second half of the game.
* TogetherInDeath: [[spoiler:Astro and Nuka... [[BackFromTheDead or are they?]]]]
* UnexpectedShmupLevel: It ''is'' Astro Boy and the first shmup level appears early, so it is not that surprising. The final one plays a little differently, though...
* UnwittingInstigatorOfDoom: [[spoiler:Atlas]], or rather his true self [[spoiler:Daichi]] is revealed to be this when it's revealed that he had taken Prime Rose from the hospital while disguised as a robot to fulfill her wish to see the moon. During their voyage, he had suffered fatal exposure to Omotanium and was thus recreated into his current self, without any memory of his former life. It is this fateful encounter that directly leads to Drake's quest to destroy robotkind in order to avenge his daughter, who he believed to have been murdered.
* UniqueEnemy: Astro can fight a single {{Mook}} in a secret area in Mu. See ShoutOut for details.

* WhamLine:
-->'''Duke Red:''' Nuka is with Death Mask now...Or should I say, [[spoiler: Nuka ''is'' Death Mask.]]
* WhamShot: The appearance of Death Mask, who then proceeds to ''destroy Astro and all robots on Earth''. Just when it seems that all is lost, you are given a second chance by the Phoenix.
* WhatIsThisThingYouCallLove: Astro gets a bit of this the first time he runs into Nuka.
* YouKeepUsingThatWord: In the original series, the function of "Omega Factor" is a ''bad thing'', actually a hazardous device which gives an evil mind to a robot or even deprive it from its mind. The power-up that Astro is using is called "Kokoro" (Heart) in Japanese, which is the opposite.
* [[YouKilledMyFather You Killed My Daughter]]: Drake wants to [[FinalSolution destroy all robots]] because a robot killed his daughter, Prime Rose. [[spoiler: Not only did she not actually die, but her "killer" wasn't even a robot in the first place.]]

* CowardlyBoss: Denkou spends the entirelity of his fight running from Astro while dropping timed bombs. He's also invisible and untouchable until Astro slaps a certain amount of devices set around the looping room.

* BadFuture: After a time travel adventure, [[spoiler: Astro Boy returns five years late to a world where the Robot War has left earth scorched and uninhabitable. His attempts to fight for justice in this environment are [[RocksFallEveryoneDies too little too late]]. On later cycles he narrows the error level down to a more manageable 3 months.]]

[[quoteright:350:https://www.mobygames.com/images/covers/l/380890-astro-boy-omega-factor-game-boy-advance-front-cover.jpg]]

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[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/astro_boy_omega_factor.jpg]]

** In terms of his fighting style, Montblanc is actually mostly Brando, a different character from the ''World's Strongest Robot'' saga, retaining only his namesake's beak-like facial features. Something of a necessity, as the original Montblanc was a pacifist who didn't even try to fight Pluto before being killed by him, whereas Brando was a robot wrestler but one wonders why they didn't just use him to begin with.

* CompositeCharacter: ''De rigeur'' for ''Astro Boy'' adaptations.
** Rag and Blue Knight are merged into a single character and both he and Deadcross are now "played" by Rock, though originally they were just one-shot characters. Furthermore, Rock later [[spoiler:finds [[HeelFaceTurn redemption and love]] and decides to stay in Mu]], becoming the version of the character from the movie ''Marine Express''.

* IAmAMonster: [[TropesAreNotGood In a very bad way.]] Atlas describes himself as one in Birth.