History YMMV / MentalOmega

** The Foehn Revolt itself is this. They are either beloved because of the utterly badass looking futuristic design of their structures, infantry, and vehicles, yet some absolutely despise them due to finding them extremely annoying to fight against due to how their units and support powers are able to inflict a wide variety of negative status effects, such as the Clairvoyants and Giantsbanes ability to paralyze infantry, the Deviatresses, Angelsharks, Irritators, and the Chaos Touch support powers ability to inflict confusion, which causes units to wander around randomly, attacking indiscriminately, as well as the Raccoons and their Haihead-exclusive counterparts, plus the Orcinus Waveshaper and Blackout Missile support powers ability to disable vehicles and structures by jamming them. It should be also noted that they also have the ability to disable support powers, superweapons included through the use of the Raccoons, Hovracoons, Signal Inhibitors, and the Signal Jammer support power as well, which create a field that blocks the ability to do so in their radius, with the Signal Inhibitors radius being large enough that, in spite of only being able to build three of them, they're able to cover up an average sized base when positioned correctly.

** Yunru, Libra, and Eureka, who are often called the "[[{{Animesque}} anime]]" [[HeroUnit commandos]] due to their appearances having more in common with anime characters appearance, and, as some argue regarding the first, concept-wise. Some like them either because, or in spite of their designs, while others dislike them because they see them as being out of place next to other commandos and even infantry units, who tend to use "grittier" and more practical designs. There are of course, also a third group who don't particularly care about the "anime" trio and simply enjoy the game.

** Yunru, Libra, and Eureka, who are often called the "[[{{Animeeesque}} anime]]" [[HeroUnit commandos]] due to their appearances having more in common with anime characters appearance, and, as some argue regarding the first, concept-wise. Some like them either because, or in spite of their designs, while others dislike them because they see them as being out of place next to other commandos and even infantry units, who tend to use "grittier" and more practical designs. There are of course, also a third group who don't particularly care about the "anime" trio and simply enjoy the game.

** Yunru, Libra, and Eureka, who are often called the [[{{Animeesque}} "anime"]] [[HeroUnit commandos]]. Some like them because of their appearance and character concept, while others dislike them because they see them as being out of place next to other infantry and commandos, who all have comparitively more "realistic" designs with more practical looking outfits.

** However, there is still the infamous "Singularity", a remake of 2.0 mission "Duality", in which you have to spark a war between Pacific Front and China. Its difficulty lies in the fact that you had only 3 units to control and you were unable to lose any of them; the map is ''extremely'' densely packed with insta-death units and traps (a random kennel on the north side will spawn ''attack dogs'' if approached, almost guaranteeing death, and thus failure, for the unit who did so), AND you have to weave carefully between both bases to destroy a number of key structures, ending with an Iron Curtain. The map will BaitAndSwitch you multiple times by suggesting/showing multiple possible routes to take, but nine times out of ten all but one path will be guarded and result in unavoidable, unpreventable death. On anything above Easy difficulty, there will be patrols of Veteran units guarding many of the only routes forward you'll need to carefully dodge, lest they sound the alarm and summon Gyrocopters to hunt you down - and none of your units can target air units. And the final, nasty cherry on top? Once you've finally reached and wiped out the Iron Curtain, you are then given a strict time limit to race all three units back through the base to the far side of the map to extraction before guaranteed failure. Put all of this together and boom. You have a mission which was not completed by 99% of players even on Easy difficulty - and can take hours (''very'' mandatory SaveScumming included) to finish for the few that did. It's also worth mentioning that "Singularity" was created by a mapper who likes to boost the difficulty of missions ''UpToEleven'' - to the point that even he is unable to complete some of his own missions.

** The Raccoons and Hovracoons are the bane of every Superweapon in the game, due to their passive ability to prevent you from using support powers, superweapons included, in a decent radius around them, as just a handful of them, combined with Signal Inhibitors, a Foehn structure which has the same ability to disable support powers, except with a much larger radius than them, can prevent you from using your superweapons on an enemy Foehn base.

* BetterThanCanon: The mod is widely considered to be better than the already highly popular vanilla Yuri's Revenge, thanks to completely rebalancing the game while keeping all the fun intact, with boatloads of new content as well as streamlining the game itself, such as streamlining the Allies and Soviets into three different sub-factions, each with their own play-style and unique units, structures, and support powers, as well as finally balancing out the once-monstrously overpowered abomination of a faction that was Yuri's army in the vanilla edition into something more suitable for competitive gameplay, all while retaining the fun stemming from it's quirky units. There's also the fact that it has a MASSIVE interconnected campaign where every faction gets their time to shine.
* {{Broken Base}}: Yes.

** The Raccoons and Hovracoons are the bane of every Superweapon in the game, due to their passive ability to prevent you from using support powers, superweapons included, in a decent radius around them, as just a handful of them can prevent you from using your superweapons on an enemy Foehn base.
** The Giantsbanes are good against tanks and aircraft alike, but the most irritating thing about them is that, like the Clairvoyants, they have a stun-gun that's capable of paralyzing infantry at long ranges.

** Orcinus Waveshapers are able to disable the weaponry of most land vehicles and naval vessels, with the only thing unaffected by it's field are infantry and aircraft. God help you if there is a high amount of anti-infantry and anti-aircraft units protecting it.

* ScrappyWeapon: The Cyborg Commando. Aside from being impossible to achieve due to the absurd requirements needed to even obtain it, which consists of infiltrating the battle labs of all four factions, which, while difficult, is not outright impossible, pales in comparison to the second requirement, which is owning the barracks of all four factions, making it impossible to achieve outside of a few select conditions, such as if you're playing Ultimate Alliance mode, which gives you the [=MCVs=] and arsenals of all four factions, alongside the stolen tech units, the Cyborg Commando unit, having four good friends who are deliberately allowing you to do so for fun, hacking the game to use cheats, and the last, and most unlikely, being that you're somehow THAT good at the game. The unit itself is also bare-bones and impractical as all hell, due to being completely unspecialized aside from dealing lots of damage and having high durability that's bolstered by it's ability to regenerate over time, as well as an immunity to Attack Dogs, Spooks, Terror Drones, Radiation and units who weaponize it, such as the Desolators/Eradicators and the Syckle, as well as being immune to poison too. Both of these things are rendered useless by multiple flaws, such as the Cyborg Commando's ArmCannon having a horribly slow rate of fire, causing friendly fire to any of your units caught in the radius of it's plasma blast, and only being able to target ground units, and the Cyborg Commando's immense durability and immunity to many things is rendered worthless as many other things are still capable of affecting it, such as Volkov's Tesla Cannon still being able to paralyze him and his canine companion Chitzkoi being able to kill him in one hit, as well as him not being immune to the Viruses darts, as well as being vulnerable to EMP's and magnetic weaponry.

* BetterThanCanon: The mod is widely considered to be better than the already highly popular vanilla Yuri's Revenge, thanks to completely rebalancing the game while keeping all the fun intact, with boatloads of new content as well as streamlining the game itself, such as reducing the Allies and Soviets to three different sub-factions, each containing a huge variety of infantry, vehicles, aircraft, naval vessels, and base defenses, as well as their own unique playstyles, and even finally balancing out the once-monstrously overpowered abomination of a faction it was in the vanilla version to being something much more balanced while still retaining all of the fun their bizarre and unique units give.

* ScrappyWeapon: The Cyborg Commando. Aside from being impossible to achieve due to the absurd requirements needed to even obtain it, which consists of infiltrating the battle labs of all four factions, which, while difficult, is not outright impossible, pales in comparison to the second requirement, which is owning the barracks of all four factions, making it impossible to achieve outside of a few select conditions, such as if you're playing Ultimate Alliance mode, which gives you the [=MCVs=] and arsenals of all four factions, alongside the stolen tech units, the Cyborg Commando unit, having four good friends who are deliberately allowing you to do so for fun, hacking the game to use cheats, and the last, and most unlikely, being that you're somehow THAT good at the game. The unit itself is also bare-bones and impractical as all hell, due to being completely unspecialized aside from dealing lots of damage and having high durability that's bolstered by it's ability to regenerate over time, as well as an immunity to Attack Dogs, Spooks, Terror Drones, Radiation and units who weaponize it, such as the Desolators[=/Eradicators and the Syckle, as well as being immune to poison too. Both of these things are rendered useless by multiple flaws, such as the Cyborg Commando's ArmCannon having a horribly slow rate of fire, causing friendly fire to any of your units caught in the radius of it's plasma blast, and only being able to target ground units, and the Cyborg Commando's immense durability and immunity to many things is rendered worthless as many other things are still capable of affecting it, such as Volkov's Tesla Cannon still being able to paralyze him and his canine companion Chitzkoi being able to kill him in one hit, as well as him not being immune to the Viruses darts, as well as being vulnerable to EMP's and magnetic weaponry.
* UnexpectedCharacter: [[spoiler:In spite of the statements that time-travel would not be involved in the plot of Mental Omega 3.x (unlike what happens in 2.x), during the cutscene in "Reality Check" (Epsilon 23), a Time Machine in ruins is visible when Yuri tells Libra of mistakes he had made. The same Time Machine appears in "Hamartia" (Allied 24), in the underground cave.]]

** While most Challenges would end on this category due to [[SNKBoss the unfair advantages the enemies have]], the Regenbogen Challenge takes the cake. While all other challenges are difficult but predictable, letting you figure out how to turtle against the AI, Regenbogen is difficult and '''un'''predictable thanks to its random weather effects. It is perfectly possible for an otherwise impenetrable base to be outright ruined if you get several of the nastiest weather effects in a row. The Yellow weather effect, which sends up to 30 Hunter-Seekers to the players' bases, causing a lot of destruction on their path, is especially infamous, with many guides simply telling players to quit if they happen to get two Yellows in a row, moreso in the early-game. Even if you can survive the onslaught of the Yellow weather, you still have to deal with the weather effects that Suppresses all your non-epic, non-projectile units, and the one that effectively turns practically all your units into {{One Hit Point Wonder}}s, greatly limiting the viable factions for this challenge.

** While most Challenges would end on this category due to [[SNKBoss the unfair advantages the enemies have]], the Regenbogen Challenge takes the cake. While all other challenges are difficult but predictable, letting you figure out how to turtle against the AI, Regenbogen is difficult and '''un'''predictable thanks to its random weather effects. It is perfectly possible for an otherwise impenetrable base to be outright ruined if you get several of the nastiest weather effects in a row. The Yellow weather effect, which sends up to 30 Hunter-Seekers to the players' bases, causing a lot of destruction on their path, is especially infamous, with many guides simply telling players to quit if they happen to get two Yellows in a row, moreso in the early-game. Even if you can survive the onslaught of the Yellow weather, you still have to deal with the weather effects that Suppresses all your non-epic, non-projectile units, and the one that effectively turns practically all your units into {{One Hit Point Wonder}}s, greatly limiting the viable factions for this challenge.
* UnexpectedCharacter: [[spoiler:In spite of the statements that time-travel would not be involved in the plot of Mental Omega 3.x (unlike what happens in 2.x), during the cutscene in "Reality Check" (Epsilon 23), a Time Machine in ruins is visible when Yuri tells Libra of mistakes he had made. The same Time Machine appears in "Hamartia" (Allied 24), in the underground cave.]]

* ScrappyWeapon: The Cyborg Commando. Aside from being impossible to achieve due to the absurd requirements needed to even obtain it, which consists of infiltrating the battle labs of all four factions, which, while difficult, is not outright impossible, pales in comparison to the second requirement, which is owning the barracks of all four factions, making it impossible to achieve outside of a few select conditions, such as if you're playing Ultimate Alliance mode, which gives you the [=MCVs=] and arsenals of all four factions, alongside the stolen tech units, the Cyborg Commando unit, having four good friends who are deliberately allowing you to do so for fun, hacking the game to use cheats, and the last, and most unlikely, being that you're somehow THAT good at the game. The unit itself is also bare-bones and impractical as all hell, due to being completely unspecialized aside from dealing lots of damage and having high durability that's bolstered by it's ability to regenerate over time, as well as an immunity to Attack Dogs, Spooks, Terror Drones, Radiation and units who weaponize it, such as the Desolators[=/Eradicators and the Syckle, as well as being immune to poison too. Both of these things are rendered useless by multiple flaws, such as the Cyborg Commando's ArmCannon having a horribly slow rate of fire, causing friendly fire to any of your units caught in the radius of it's plasma blast, and only being able to target ground units, and the Cyborg Commando's immense durability and immunity to many things is rendered worthless as many other things are still capable of affecting it, such as Volkov's Tesla Cannon still being able to paralyze him and his canine companion Chitzkoi being able to kill him in one hit, as well as him not being immune to the Viruses darts, as well as being vulnerable to [=EMPs=] and magnetic weaponry.

* ScrappyWeapon: The Cyborg Commando. Aside from being impossible to achieve due to the absurd requirements needed to even obtain it, which consists of infiltrating the battle labs of all four factions, which, while difficult, is not outright impossible, pales in comparison to the second requirement, which is owning the barracks of all four factions, making it impossible to achieve outside of a few select conditions, such as if you're playing Ultimate Alliance mode, which gives you the [=MCVs=] and arsenals of all four factions, alongside the stolen tech units, the Cyborg Commando unit, having four good friends who are deliberately allowing you to do so for fun, hacking the game to use cheats, and the last, and most unlikely, being that you're somehow THAT good at the game. The unit itself is also bare-bones and impractical as all hell, due to being completely unspecialized aside from dealing lots of damage and having high durability that's bolstered by it's ability to regenerate over time, as well as an immunity to Attack Dogs, Spooks, Terror Drones, Radiation and units who weaponize it, such as the Desolators[=/Eradicators and the Syckle, as well as being immune to poison too. Both of these things are rendered useless by multiple flaws, such as the Cyborg Commando's ArmCannon having a horribly slow rate of fire, causing friendly fire to any of your units caught in the radius of it's plasma blast, and only being able to target ground units, and the Cyborg Commando's immense durability and immunity to many things is rendered worthless as many other things are still capable of affecting it, such as Volkov's Tesla Cannon still being able to paralyze him and his canine companion Chitzkoi being able to kill him in one hit, as well as him not being immune to the Viruses darts, as well as being vulnerable to [=EMPs=] and magnetic weaponry.

* ScrappyWeapon: The Cyborg Commando. Aside from the next to impossible requirements that you can only really achieve using cheats outside of Ultimate Alliance mode which features it's requirements of having all four factions barracks and all labs infiltrated due to giving you the arsenals of all factions and their sub-factions alongside their stolen tech unit, the only thing that the Cyborg Commando is good for is dealing and absorbing damage thanks to it's weapon being an ArmCannon that fires an area of effect plasma ball, as well as having high health and the ability to regenerate, but even then, it's overshadowed by other units in terms of damage dealing and defense, due to having a horrifically slow fire rate and being able to accidentally cause friendly fire, as well as being unable to aim at aircrafts, it's durability is also rendered useless by the fact that Chitzkoi can still kill it in one hit, and that concentrated anti-infantry weaponry will make short work of it.

* BetterThanCanon: The mod is widely considered to be better than the already highly popular vanilla Yuri's Revenge, thanks to completely rebalancing the game while keeping all the unf intact with boatloads of new content as well as streamlining the game in itself, such as reducing the Allies and Soviets to three different sub-factions, each containing a huge variety of infantry, vehicles, aircraft, naval vessels, and base defenses, as well as their own unique playstyles, and even finally balancing out the once-monstrously overpowered abomination of a faction it was in the vanilla version to being something much more balanced while still retaining all of the fun their bizarre and unique units give.

*** "[[https://www.youtube.com/watch?v=aK8VBkZBPpE From Chaos]]" also by World Beyond, [[https://www.youtube.com/watch?v=FI4cKWsebF0 its instrumental version]] is used in the "[[https://www.youtube.com/watch?v=g2HfWctqgtA The Finale Trailer]]", a somewhat sinister track reflecting the imminent threat of the Mental Omega Device on the world, yet offers a glimpse of hope in the Foehn Revolt.

* NightmareFuel: During the loading screen, Yuri's ghost portrait is shown in Epsilon skirmish with their music playing.

*** Bewitched by World Beyond plays during the epilogue of the Allied campaign and enhances the feeling of loss and despair as Tanya and the few survivors of the Allied expeditionary force escape on board the Paradox Engine wreckage as it's Chronoshifted to Point Hope, leaving the rest of the Allies including Siegfried to die or be mind controlled.
*** Not the End by World Beyond, the epilogue theme to the Foehn origins campaign is the opposite of the above, a triumphant orchestral rock theme to restore a feeling of hope after Yuri's seemingly inevitable victory is thwarted at the last minute.

*** Godsend Intro is essentially the theme for the Aerial Fortress Irkalla. This dark, apocalyptic theme perfectly fits the unit's introducing level, Godsend (Epsilon 17).
*** Annihilation March, the opening theme of Death's Hand (Soviet 24) composed by Smiechu. It sounds exactly as its name implies, a bombastic Hell March-esque war theme that perfectly suits the Soviets taking back Moscow from Yuri.
*** Virus by Frank Klepacki plays over the opening of Insomnia (Allied 22) and is the kind of fast-paced rocktronic theme to get you in the mood to deliver a CurbStompBattle to Epsilon.
*** Militant Funk by Frank Klepacki plays over the opening of Withershins (Allied 23) and like the example immediately preceding it exists to make kicking Epsilon ass with the full might of the Allies all the more badass.
*** Machines Collide again by Frank Klepacki plays over the opening of Hamartia (Allied 24) an ominous yet epic score for the ominous initial stage of the mission set in Epsilon's underground isntallation underneath the Mental Omega Device.
*** Alternate Route Advised by World Beyond plays after the initial stage of Vanishing Point (Foehn Origins 05) and perfectly invokes AutobotsRockOut in order to pull you out of the Darkest Hour that is the imminent global mind control so that you kick more Epsilon ass.
*** Land of No Justice by World Beyond, the opening theme of The Remnant (Foehn Origins 06) and captures the feel of the level being the desperate last stand for all that remain to fight Yuri after the activation of the Mental Omega Device.