History FaceHeelTurn / VideoGames

* Mario plays the antagonist in ''Franchise/DonkeyKong Junior''.

* ''VideoGame/SoulCalibur'': someone is doing one of these every five minutes. We have Siegfried, who did a Face to Heel (before the series even started) to Face to Heel to Face to WellIntentionedExtremist Heel...and then back to Face again. Then there's [[ObliviouslyEvil Yun-Seong]], who isn't all the way there yet, but he's getting there. Raphael, who did a Face Heel turn from 2 to 3, and did a Heel/Worse Heel turn from 3 to 4. Sophitia has done this in 4: arguably she has a good [[ForcedIntoEvil reason]], but as she has been infused with the power of Soul Edge, there's nothing saying that she might not like this state of affairs later on. Then you've got [[WoobieDestroyerOfWorlds Pyrrha]], who went from Face to Heel (somewhat against her will) and then back to Face, and then BACK to Heel, before finally settling on Face.
** In the fifth game, the holy sword Soul Calibur itself somehow manages to turn heel whilst remaining determined to destroy the evil Soul Edge.

* In ''VideoGame/StarCraft'' you have Sarah Kerrigan, who go from being the protagonist's girlfriend to becoming the Zerg Queen of Blades.
** Kerrigan is less case of a FaceHeelTurn than forcible corruption by the Zerg, making her BrainwashedAndCrazy. This is supported by the HeelFaceTurn she goes through after being cleansed of the Zerg corruption in ''VideoGame/StarCraftII''... although she is still something of a WellIntentionedExtremist.

* Kazuya from ''VideoGame/{{Tekken}}''. He was originally a Ryu-esque cookie-cutter hero [[spoiler: but eventually let the devil consume him and became (arguable) one of the bad guys]]. By the beginning of the sixth game, he had plans for world domination.
** And there's also [[spoiler: Kazuya's son with Jun]], Jin Kazama. He was TheHero for about three games, then at the beginning of the sixth game, takes over the mega corporation and uses it to start WorldWarIII and try to TakeOverTheWorld, which prompts Kazuya to speed up his plan for world domination.
** The entire Mishima Zaibatsu, by ''VideoGame/{{Tekken}} 6'', are caught in an endless ''HeelFaceRevolvingDoor''. It would be boring to watch this over and over again, and the more interesting characters seem on the periphery by now, but alas, Namco takes the position that ''ElitesAreMoreGlamorous''.

* ''VideoGame/BlazBlue'':

* ''VideoGame/KirbyTripleDeluxe'': [[spoiler:[[BigBad Queen Sectonia]]]] used to be a kind and benevolent queen of Floralia and Taranza's friend. However, exposure to the Dimension Mirror (which still contained a vengeful [[VideoGame/KirbyAndTheAmazingMirror Dark Meta Knight]]) led her to becoming the [[Narcissist narcissistic]] [[GodSaveUsFromTheQueen tyrant]] who imprisons her subjects she is now.

* The VideoGame/{{Suikoden}} has a few examples:

** The entire Mishima Zaibatsu, by '''VideoGame/{{Tekken}} 6'', are caught in an endless ''HeelFaceRevolvingDoor''. It would be boring to watch this over and over again, and the more interesting characters seem on the periphery by now, but alas, Namco takes the position that ''ElitesAreMoreGlamorous''.

* In ''VideoGame/KidIcarusUprising'', [[spoiler: Pyrron]] is just your everyday, LargeHam, [[KillItWithFire fire happy]] [[spoiler: sun god]]. He's just about the only guy who knows what the [[spoiler: Aurum]] are all about, and while he's mostly an idiot, he certainly knows how to make them hurt. [[spoiler: Until you reach the Aurum brain, and in the middle of the boss fight he dives right in and completely takes over the alien hive mind.]]
-->[[spoiler: Pyrron]]: "I've leveled up! I'm a Level Infinity Epic Super God...PLUS!"

** During ''VideoGame/DeadSpace3'', Robert Norton leads EarthGov's [[TheRemnant last battalion]] following the Unitologists taking them out. While he starts somewhat friendly towards Isaac Clarke at the beginning of the game, learning that he was Ellie's new boyfriend causes their companionship to be strained. Later when Isaac continued inspiring the group to check out Tau Volantis in order to find out how to stop the Marker epidemic from spreading, Norton continues trying to talk the group out of it and tries to convince them to return home instead. [[spoiler:After they reach the planet however, Norton sells the group's location out to Jakob Arthur Danik and the Unitologists and secretly makes a deal with Danik to have Isaac killed in exchange for a ship to leave the planet. After Isaac exits the Nexus' belly, Norton willingly leaves him trapped in a cage and later attempts to kill Isaac himself after he saved him from the Nexus while going on a rant towards Isaac with it ending with him telling him that Ellie doesn't love him. Isaac is forced to kill Norton in self-defense as a result.]]

--> '''Alduin:''' ''"You I curse right here and right now! I take away your ability to jump and jump and jump and doom you to [the void] where you will not be able to leave except for auspicious days long between one and another and even so only through hard, hard work. And it will be this way, my little corner cutter, until you have [[OmnicidalManiac destroyed all that in the world]] which you have stolen from earlier kalpas, [[ImpossibleTask which is to say probably never at all!]]"''

-> [[spoiler:'''Room!Dedan''']]: The future only waits if we trace it, and just our arms and our efforts'll make it a heaven on Earth.

** In the fifth game the holy sword Soul Calibur itself somehow manages to turn heel whilst remaining determined to destroy the evil Soul Edge.

* In the backstory for ''VideoGame/StarFox64'', Pigma Dengar betrayed James [=McCloud=] to Andross. Later in the series, Andross's grandson Dash Bowman undergoes one of these in two alternate endings for ''Star Fox: Command''.

** Nolan Stross, a character first introduced in the prequel film ''WesternAnimation/DeadSpaceAftermath'', ends up going through this throughout both the film and his return in ''VideoGame/DeadSpace2''. While he initially started out as the sane scientist of his crew that was sent to retrieve the marker from the remains of Aegis VII while he was secretly having an affair between his wife and doctor Helen Cho, exposure to the Marker when studying it started driving him insane [[spoiler:and led him to hallucinate both his infant child and wife as Necromorphs and killed them as a result]]. The further down his sanity spirals, the less helpful he becomes to Isaac Clarke and Ellie Langford. [[spoiler:In ''Dead Space 2'', he's actively hindering your progress after his SanitySlippage gets bad enough. It's born of a desire to not accept responsibility for what he's done by killing his wife and son. Eventually, he turns on Isaac and Ellie right before they reach the EarthGov sector in the Titan Sprawl. Stross impales Ellie's eye on a needle and while she does survive, he later attempts to do the same to Isaac. By this point, Isaac is forced to kill him or else Stross will kill Isaac and cause a game over.]]
** During ''VideoGame/DeadSpace3'', Robert Norton leads EarthGov's [[TheRemnant last battalion]] following the Unitologists taking them out. While he starts somewhat friendly towards Isaac Clarke at the beginning of the game, learning that he was Ellie's new boyfriend causes their companionship to be strained. Later when Isaac continued inspiring the group to check out Tau Volantis in order to find out how to stop the Marker epidemic from spreading, Norton continues trying to talk the group out of it and tries to convince them to return home instead. [[spoiler:After they reach the planet however, Norton sells the group's location out to Jakob Arthur Danik and the Unitologists and secretly makes a deal with Danik to have Isaac killed in exchange for a ship to leave the planet. After Isaac exits the Nexus' belly, Norton willingly leaves him trapped in a cage and later attempts to kill Isaac himself after he saved him from the Nexus and is forced to kill Norton in self-defense.]]

** Nolan Stross, a character first introduced in the prequel film ''WesternAnimation/DeadSpaceAftermath'', ends up going through this throughout both the film and his return in ''VideoGame/DeadSpace2''. While he initially started out as the sane scientist of his crew that was sent to retrieve the marker from the remains of Aegis VII while he was secretly having an affair between his wife and doctor Helen Cho, exposure to the Marker when studying it started driving him insane [[spoiler:and led him to hallucinate both his infant child and wife as Necromorphs and killed them as a result]]. The further down his sanity spirals, the less helpful he becomes to Isaac Clarke and Ellie Langford. [[spoiler:In ''Dead Space 2'', he's actively hindering your progress after his SanitySlippage gets bad enough. It's born of a desire to not accept responsibility for what he's done.]]

* The Wanderer from ''VideoGame/DiabloII'' who is heavily implied to be the protagonist from the first game. In fact, Creator/{{Blizzard|Entertainment}} (who made ''Warcraft'', ''[=StarCraft=]'' and ''Diablo'') is so fond of this trope that it has become known as the Blizzard Principle when in a video game you have to take on lasts game's protagonist (or other good guy) who have gone mad.

* Something similar to Sophitia above happened in ''VideoGame/BlazBlueContinuumShift''. [[spoiler:By the end of the series, [[ChineseGirl Litchi Faye-Ling]] is [[ForcedIntoEvil forced to join the bad guys' side]], since the bad guys kept the lover she's been trying to cure (Arakune) as a hostage and they had the cure she badly wanted, and she has to join if she wants both the cure and that lover. Throughout the series, she's usually one of the genuinely good characters.]]

** Your buddy friend, 343 Guilty Spark does this on two occasions. In ''VideoGame/HaloCombatEvolved'', he helps you to activate the ring until Cortana stops you two, pointing that doing so will kill everyone. 343 Guilty Spark sees this as breaking protocol and then tries to kill you. This also happens in ''VideoGame/{{Halo 3}}'', where you find out that firing the unfinished Halo will also destroy it. 343 starts going off at you again and then kills Sergeant Johnson. [[spoiler: You quickly kill 343 Guilty Spark with Johnson's Spartan laser.]]
** [[spoiler: Cortana]] of all people becomes the BigBad in ''VideoGame/Halo5Guardians''. [[spoiler: She goes from heroically sacrificing herself to save Master Chief in ''VideoGame/{{Halo 4}}'', despite her rapidly deteriorating sanity, to attempting to rule over the galaxy as a benevolent overlord in ''Halo 5'' after she's revived and discovers a way to make [=AIs=] immortal.]]

* [[spoiler:Wheatley, who becomes DrunkWithPower after the core transfer with [=GLaDOS=]]] in ''VideoGame/{{Portal 2}}''. In fact, the audio files for these lines have "heel turn" in their names. [[spoiler:It's especially painful because the betrayal happens actively onscreen, with him suddenly and dramatically JumpingOffTheSlipperySlope. You can actually pinpoint the exact moment when the power drives him crazy.]]

* Both [[spoiler:Jaesa Wilsaam]] and [[spoiler:Nomen Karr]] in ''Videogame/StarWarsTheOldRepublic'' did this the first to join you and the second to kill you... three times!

* ''VideoGame/TelltalesGameOfThrones'': The traitor on your council turns out to be [[spoiler: the man you chose not to become your sentinel; Ser Royland or Duncan]]. They betray you because they blame ''you'' for instigating the war with the Whitehill's because of your poor leadership.

* Clyde in ''VideoGame/{{Vigilante 8}}'' goes from a member of the Vigilantes opposing [[CorruptCorporateExecutive OMAR]] and their thugs to the CEO of OMAR who stole a time machine to kill his former leader and ensure the submission of the US in the sequel thanks to [[spoiler: finding [[BrainwashedAndCrazy Houston]]'s mind control bracelets in a service station bathroom.]]
* [[spoiler: Mike and Bonnie]] from ''VideoGame/TheWalkingDead'' rob your character ([[KickTheDog who's a little girl]]) after severing their friendship with you for good despite all the hardships you faced with them during the zombie apocalypse.

* Sialeeds in ''VideoGame/SuikodenV''.
** Jowy in ''VideoGame/SuikodenII''.

* In ''VideoGame/StarCraft'' you have Sarah Kerrigan, who go from being the protagonist's girlfriend to becoming the Zerg Queen of Blades, then you have Arcturus Mengsk who seems like a nice guy then turn out to be a genocidal dictator. Followed by Samir Duran who first joins up with the United Earth Directorate to bring down Arcturus Mengsk, and then betrays them to the Zerg, then he betrays the Zerg to Amon.
** Kerrigan is less case of a FaceHeelTurn than forcible corruption by the Zerg, making her BrainwashedAndCrazy. This is supported by the HeelFaceTurn she goes through after being cleansed of the Zerg corruption in ''VideoGame/StarCraftII''... although she is still something of a WellIntentionedExtremist. Duran is actually a subversion as it is revealed that [[spoiler:he was EvilAllAlong.]]

* ''VideoGame/InjusticeGodsAmongUs'' has Superman doing this after the Joker blows Metropolis to kingdom come with a bomb he attached to Lois, detonating it by drugging Superman into thinking Lois was Doomsday. When Lois's heart stopped, boom. Superman, in a fit of rage, tears the Joker's heart out, ignoring Batman's attempts to stop him. Afterwards, the good-hearted boyscout superhero was no more, and he became a cold-hearted, paranoid tyrant that is seemingly unstoppable [[spoiler:except against another Superman from another universe who hadn't experienced such trauma and still stayed on the side of good.]]
* ''VideoGame/TalesOfSymphonia'' features a reveal that there's a traitor in the party's midst towards the end of the story. [[spoiler:Zelos is TheMole for Cruxis after he helps them kidnap Colette]]. However, this is all an act, and the former traitor goes [[WelcomeBackTraitor right back to helping the party]] a short time later. [[spoiler:However, if you talked to Kratos at Flanoir, the fake FaceHeelTurn instead becomes a ''real'' FaceHeelTurn, forcing the party to kill Zelos to get past him.]]
* In the ''Franchise/ShinMegamiTensei'' franchise:
** Most of the remaining humans in the [[DeathWorld Vortex World]] in ''VideoGame/ShinMegamiTenseiIIINocturne'' once the true stakes are revealed. Hikawa was evil to begin with, then Isamu sacrifices Hijiri to summon Noah and Chiaki sics her angelic army on the Manikin city of Mifunashiro to summon Baal Avatar.
** In ''VideoGame/ShinMegamiTenseiStrangeJourney'', after Jimenez [[spoiler:fuses with Bugaboo]] and Zelenin [[spoiler:is transformed into an angel]], their loyalty to the mission becomes increasingly shaky. At the conclusion of Sector Grus, both of them formally desert the Red Sprite for the demons and Mastema, respectively. A short while later, the protagonist can join them.
** In ''VideoGame/ShinMegamiTenseiIV'', finding out Tayama's DarkSecret is the last straw that pushes Walter to desert the Samurai and join [[spoiler:Lilith]]'s cause. Of course, being a ''Shin Megami Tensei'' game, Flynn can follow him.
** In ''VideoGame/Persona4'' [[UpdatedRerelease Golden]], ''the protagonist himself'' can go through one if he makes friends with [[spoiler: Tohru Adachi]] before realizing he's the killer, [[spoiler: confronts him (instead of keeping his thoughts to himself]] and ''then'' [[spoiler: aids Adachi via destroying crucial evidence.]] [[spoiler: This unlocks the "Accomplice ending": it has Adachi becoming a KarmaHoudini for the murders and even ''taunting the protagonist'' before he (the MC) leaves Inaba.]] Doing so actually gives a decent reward for a NewGamePlus. At the very least, it's much more cost effective than what you get in the true ending.
** Similarly, ''VideoGame/Persona5'' allows you to [[spoiler:cut a deal with Yaldabaoth and leave him to his business in exchange for him leaving you to yours. The final cutscene shows Joker giving a PsychoticSmirk as he succumbs to the temptation to abuse his powers.]]
* The supposed FaceHeelTurn of Ralgha "Hobbes" nar Hhallas in ''VideoGame/WingCommander III'' didn't work for many fans of that series who have only played the PC version (the console versions used bigger [=CDs=] than computers of the time, and could thus fit the explanation cutscene into the game; the {{novelization}} also covers the explanation). In this case, he was an (unwitting) [[TheMole mole]].
* Sorbet in ''[[VideoGame/MagicalVacation Magical Starsign]]'' fakes one as part of an elaborate plan to trick the Big Bad, and it's so convincing that even your party falls for it...unfortunately, you waltz in just as her plan is about to come to fruition.
** Fortunately, it wasn't the best thought out plan anyway...
* Ghaleon in ''VideoGame/LunarTheSilverStar''. He was one of the Four Heroes along with his friend and rival, Dragonmaster Dyne. In the original version, he becomes embittered over Dyne's supposed death and plots to TakeOverTheWorld to get back at the goddess Althena. The remakes change Ghaleon's motivation to him wanting to become a DarkMessiah in Dyne's absence.
** [[spoiler:He does it again]] in ''VideoGame/LunarEternalBlue''.
* Queen Ashlelei in ''VideoGame/{{Malicious}}'', the once great and respectable ruler turned into a ravaging war demoness after a series of traumatic events, her two children being killed by her husband, King Eldrake their father, in front of her is one of these events to name.

* In the 11th chapter of the first ''VideoGame/SakuraWars'' game, [[spoiler: Ayame Fujieda]].
* In ''VideoGame/Mother3'', [[spoiler:Claus is brainwashed by Porky and becomes the Masked Man (also the FinalBoss)]].

* In ''VideoGame/SuperRobotWarsOriginalGeneration'' and ''VideoGame/SuperRobotWarsAlpha'' [[spoiler:Ingram Prisken, leader of the SRX team and Ryusei's mentor, reveals halfway through the game that he is an alien spy who was trying to strengthen the earthlings so they would make better weapons for the Balmar. He afterwards becomes ThatOneBoss.]]
** Captain Lee in ''VideoGame/SuperRobotWarsOriginalGeneration 2'' pulls one of these, after spending his entire time [[KickTheDog kicking dogs]]. Even a dead family, doesn't protect him.
* Jerry Ying from the Creator/JohnWoo game ''VideoGame/{{Stranglehold}}'', who starts out as Tequila's partner and ally inside Wong's Dragon Claw syndicate, only to [[spoiler:[[GoingNative go native during the Chicago History Museum stage]] and carry out Wong's orders to kill Tequila and [[OffingTheOffspring Billie, Wong's own daughter]]. Tequila survives, but Billie isn't so lucky, setting up a furious showdown between partners as Tequila seeks vengeance for Billie]].
* Most enemies in the ''VideoGame/{{Warcraft}}'' games started good and were corrupted by some means. The only creatures who were evil from the start are the [[EldritchAbomination Old Gods]] of Azeroth and some of their servants.
** Sargeras by [[HeWhoFightsMonsters fighting a bit too many demons.]]
** The Eredar and the Orcs started out as peaceful {{Magitek}} and shamanistic races, respectively, but were corrupted by promises of power.
** Pictured in the main page: Arthas in ''VideoGame/WarcraftIII'' falls due to the Lich King's EvilPlan.
** Vincent Godfrey is interesting in the fact that he Face Heel Turns twice without ever committing a HeelFaceTurn. When you first start the Worgen starting experience he's a loyal Gilnean citizen and is seemingly important in helping cure your character of the Worgen curse. He then Face Heel Turns against you when he finds out that King Greymane is a Worgen and attempts to ransom him to the Forsaken until rescued by the player character. After killing himself, he is risen as a Forsaken and helps the Forsaken players in helping fight Gilnean Rebels in Pyrewood Village before he the betrays the Forsaken and sets up shop in Shadowfang Keep.
** The Zandalari trolls have turned hostile after their homeland on Zandalar Isle is destroyed in the ''Cataclysm'', and by the time of ''Mists of Pandaria'', they have allied with the malevolent Thunder King.
* In ''VideoGame/StarCraft'' you have Sarah Kerrigan, who go from being the protagonist's girlfriend to becoming the Zerg Queen of Blades, then you have Arcturus Mengsk who seems like a nice guy then turn out to be a genocidal dictator. Followed by Samir Duran who first joins up with the United Earth Directorate to bring down Arcturus Mengsk, and then betrays them to the Zerg, then he betrays the Zerg to Amon.
** Kerrigan is less case of a FaceHeelTurn than forcible corruption by the Zerg, making her BrainwashedAndCrazy. This is supported by the HeelFaceTurn she goes through after being cleansed of the Zerg corruption in ''VideoGame/StarCraftII''... although she is still something of a WellIntentionedExtremist. Duran is actually a subversion as it is revealed that [[spoiler:he was EvilAllAlong.]]
* The Wanderer from ''VideoGame/DiabloII'' who is heavily implied to be the protagonist from the first game. In fact, Creator/{{Blizzard|Entertainment}} (who made ''Warcraft'', ''[=StarCraft=]'' and ''Diablo'') is so fond of this trope that it has become known as the Blizzard Principle when in a video game you have to take on lasts game's protagonist (or other good guy) who have gone mad.
* Beat in ''VideoGame/TheWorldEndsWithYou'' does a Face Heel Turn ''and'' [[HeelFaceTurn the opposite]].
** Technically, Joshua also had a Face Heel Turn, but he was that way from the beginning; he was just acting.
* ''VideoGame/BatenKaitos'' has a fantastic example in the first game, where [[spoiler:''the main character'', Kalas]] pulls a FaceHeelTurn. [[spoiler:He later pulls a HeelFaceTurn, though]].
* Sialeeds in ''VideoGame/SuikodenV''.
** Jowy in ''VideoGame/SuikodenII''.
* Both Big Boss and Zero certainly qualify with regard to the VideoGame/MetalGear series. One became the leader who of a mercenary nation who start war and is the antagonist for the first two game, while Zero and his Patriots are the antagonist behind the other numbered games. All because the Boss died.
** [[VideoGame/MetalGearSolid3SnakeEater The Boss]] herself is a subversion. Initially coming off as somewhat cold and seemingly defecting to the Soviet Union, she's later revealed to be both a highly compassionate and honorable woman, as well as a FakeDefector. Unfortunately, the last part doesn't come out until after Snake has killed her, and [[HeroWithBadPublicity her posthumous reputation has been destroyed]].

* In ''VideoGame/PokemonRedAndBlue'', a Team Rocket Grunt on Nugget Bridge asks you to do this. However, he is just kidding.
** Subverted in ''VideoGame/PokemonMysteryDungeonExplorers'', when your partner seemingly sides with Darkrai, only for the hero to immediately deduce that they've been trapped in a nightmare due to knowing they'd never give up so easily, and snap themselves back to reality by attacking the latter of the two.
* Mario plays the antagonist in ''Franchise/DonkeyKong Junior''.
** Speaking of Mario games: at the end of ''VideoGame/PaperMarioTheThousandYearDoor'', the BigBad asks you to do this. You can actually say yes - it gives you a NonstandardGameOver.
** In ''VideoGame/MarioAndLuigiSuperstarSaga'' [[spoiler: Birdo]] pulls out a FHT after helping the Mario Bros. earlier. Another FHT happens in ''[[VideoGame/MarioAndLuigiBowsersInsideStory Bowser's Inside Story]]'', when [[spoiler: Sergeant Guy, Corporal Paraplonk and Private Goomp]] betray [[VillainProtagonist Bowser]] and switch over to [[BigBad Fawful's]] side.
* The player character and his FiveManBand in ''Mechwarrior 4: Vengeance'' becomes the main villainous group in the ''Black Knight'' expansion.
* Sigma from ''VideoGame/MegaManX'' was originally the leader of the Maverick Hunters before he caught (and soon after became) TheVirus from Zero and decided to go evil and declare war against mankind. Zero, in turn, does a HeelFaceTurn, caused by said virus transfer via a punch to the forehead.
** And in a turnaround, [[spoiler:the title character]] of ''VideoGame/MegaManX'' was supposed to make a FaceHeelTurn into the BigBad of the ''VideoGame/MegaManZero'' series. [[FauxShadow Emphasis on]] ''[[FauxShadow supposed]]'', thanks to a ContinuitySnarl.
* ''The VideoGame/MegaManZero'' series gives us Elpizo in the second game.
* Colonel from ''VideoGame/MegaManBattleNetwork'' was previously the Navi of the leader of a team that aimed to purge Nebula from the Net before doing a FaceHeelTurn.
* In ''Hero Senki'' [[spoiler: Gilliam Yeager, the Ally with the most powerful unit at the start of the game is the final boss. He becomes TheAtoner after he jumps universes though]]
* It's stated that [[spoiler: Gol and Maia]] from the original ''VideoGame/JakAndDaxter'' were good once, but exposure to [[BadPowersBadPeople Dark]] [[GreenRocks Eco]] caused a faceheel before the beginning of the game.

* ''VideoGame/TheJediMasters'' has [[spoiler:Kannos]] becomes evil when he is possessed by the D'arth Syyth.
* In ''VideoGame/StarOceanTheLastHope'', [[spoiler: Faize pulls a big one. He doesn't just become a villain, he becomes ''the final boss''.]]
* ''[[VideoGame/{{Gradius}} Gradius ReBirth]]'' retcons Venom into an example of this--he starts off as James's CO, but becomes a heel after you complete the game's third loop. He goes on to become the BigBad of ''[[GaidenGame Nemesis 2]]'' and ''[[GaidenGame 3]]'', two lesser-known installments released on the MSX over 20 years before.
* Kazuya from ''VideoGame/{{Tekken}}''. He was originally a Ryu-esque cookie-cutter hero [[spoiler: but eventually let the devil consume him and became (arguable) one of the bad guys]]. By the beginning of the sixth game, he had plans for world domination.
** And there's also [[spoiler: Kazuya's son with Jun]], Jin Kazama. He was TheHero for about three games, then at the beginning of the sixth game, takes over the mega corporation and uses it to start WorldWarIII and try to TakeOverTheWorld, which prompts Kazuya to speed up his plan for world domination.
** The entire Mishima Zaibatsu, by '''VideoGame/{{Tekken}} 6'', are caught in an endless ''HeelFaceRevolvingDoor''. It would be boring to watch this over and over again, and the more interesting characters seem on the periphery by now, but alas, Namco takes the position that ''ElitesAreMoreGlamorous''.

* Common in the ''VideoGame/GrandTheftAuto'' series, though considering you are usually playing a VillainProtagonist it's usually more a case of Heel Heel Turn.
** Catalina in the opening sequence of ''VideoGame/GrandTheftAutoIII''.
** [[spoiler:Salvatore Leone in the mission Last Requests]] in ''VideoGame/GrandTheftAutoIII''.
** [[spoiler:Lance Vance]] in ''[[VideoGame/GrandTheftAutoViceCity Vice City]]''.
** [[spoiler:Big Smoke and Ryder]] in ''[[VideoGame/GrandTheftAutoSanAndreas San Andreas]]''.
** [[spoiler:Dmitri Rascalov and Michelle]] in ''VideoGame/GrandTheftAutoIV''.
*** [[spoiler:Darko Brevic]] in the backstory of ''VideoGame/GrandTheftAutoIV''.
** [[spoiler:Franklin]] can become this in ''VideoGame/GrandTheftAutoV'' if you [[SadisticChoice pick option A or B]] where [[spoiler: he kills Michael or Trevor in order to save his own skin. [[TakeAThirdOption Option C lets you save both characters]] and all three team up to take down the BigBad.]]
* ''VideoGame/SoulCalibur'': someone is doing one of these every five minutes. We have Siegfried, who did a Face to Heel (before the series even started) to Face to Heel to Face to WellIntentionedExtremist Heel...and then back to Face again. Then there's [[ObliviouslyEvil Yun-Seong]], who isn't all the way there yet, but he's getting there. Raphael, who did a Face Heel turn from 2 to 3, and did a Heel/Worse Heel turn from 3 to 4. Sophitia has done this in 4: arguably she has a good [[ForcedIntoEvil reason]], but as she has been infused with the power of Soul Edge, there's nothing saying that she might not like this state of affairs later on. Then you've got [[WoobieDestroyerOfWorlds Pyrrha]], who went from Face to Heel (somewhat against her will) and then back to Face, and then BACK to Heel, before finally settling on Face.
** In the fifth game the holy sword Soul Calibur itself somehow manages to turn heel whilst remaining determined to destroy the evil Soul Edge.
* At the end of the ''VideoGame/{{Fallout 3}}'' dlc ''Operation: Anchorage'', [[spoiler:an Outcast defender named Sibley gets disgusted that his superior is sharing the spoils with a "local" (you) and attempts to kill him unless you stop him.]]
** Also, in the main game, [[spoiler:Anna Holt is the one who tells the enclave about the project purity activation code, after she's captured, and later shows up as a scientist working for them in their base. Oddly enough, you still get bad karma for killing her]].
* ''Franchise/{{Halo}}''
** Your buddy friend, 343 Guilty Spark does this on two occasions. In ''VideoGame/HaloCombatEvolved'', he helps you to activate the ring until Cortana stops you two, pointing that doing so will kill everyone. 343 Guilty Spark sees this as breaking protocol and then tries to kill you. This also happens in ''VideoGame/{{Halo 3}}'', where you find out that firing the unfinished Halo will also destroy it. 343 starts going off at you again and then kills Sergeant Johnson. [[spoiler: You quickly kill 343 Guilty Spark with Johnson's Spartan laser.]]
** [[spoiler: Cortana]] of all people becomes the BigBad in ''VideoGame/Halo5Guardians''. [[spoiler: She goes from heroically sacrificing herself to save Master Chief in ''VideoGame/{{Halo 4}}'', despite her rapidly deteriorating sanity, to attempting to rule over the galaxy as a benevolent overlord in ''Halo 5'' after she's revived and discovers a way to make [=AIs=] immortal.]]
* In ''VideoGame/ModernWarfare 2'', [[spoiler: Gen. Shepherd has one near the end of the game and kills Roach and Ghost.]]
* In ''VideoGame/BrutalLegend'', [[spoiler:Ophelia drowns herself in the Lake of Black Tears and comes back leading the Drowning Doom]] after being branded as a traitor and being cast out. But the end reveals that [[spoiler:Drowned Ophelia was a manifestation of the Lake itself, and seemingly not Ophelia personally]].
* Possible in ''VideoGame/SpiderManWebOfShadows'' if you choose to let the Symbiote have its way. In the end of an all villain story, Spider-Man becomes the emperor of the Symbiotes and rules over New York City.
* In ''VideoGame/GuildWars'', [[spoiler:Vizier Khilbron, who appears about halfway through the Prophecies campaign, provides indispensable assistance to the players on several occasions in fighting the White Mantle and their Mursaat allies, and turns out to be the BigBad who has been manipulating the player all along to set up the proper conditions for his Titans to assault Tyria so he can take it over.]]
** The leaders of the White Mantle, and the White Mantle as a whole. The Bonus Mission Pack shows White Mantle founder Saul D'Alessio as a pretty swell guy, fearlessly defending his homeland from the Charr in an epic battle with help from the Mursaat. What did he get for his trouble? The Mursaat kidnap him and take him away forever as payment for their help. The remaining survivors, who felt understandably betrayed and ripped off, decided fighting for justice isn't all it's cracked up to be, and instead started a campaign to take over Kryta and secure absolute power for themselves.
** Shiro Tagachi. Granted he was manipulated into becoming corrupt and evil, but it's strongly implied that he used to be quite a fearsome defender of the innocent in his younger days.
** Torin, a rather unimportant Ascalon Guardsman in the beginning of the Prophecies campaign, becomes a bandit after the apocalyptic Searing event. A quest directs you to find him and his bandit comrades outside Fort Ranik and kill him. The reason for his face heel turn is never explained. Then again, he was the minor-est of minor characters to begin with, so it's probably not important to the storyline.
** More Ascalon Guards turn heel after the Searing: Footman Tate and Footman Quinn stole a priceless artifact from a temple and ran off with it. Their reasons are never explained, though it's probably simple greed. A quest has you hunting down the traitors. Footman Tate surrenders after a short dialogue, but Footman Quinn is hiding far from any civilized settlement and will attack you on sight without a word.
** Markis, the Shining Blade councilman from Prophecies. He initially appears as a high ranking Shining Blade officer with the group's best interests at heart. After a few conspicuous absences, it's later revealed that he's a White Mantle infiltrator. Late in the campaign, he taunts you about Saidra's death and your stupidity at falling for his ruse. It ends with the player's group getting a very well-deserved ''RoaringRampageOfRevenge'' on him.
** Elonbel from the Nightfall campaign. A local guardsman on Istan who cuts a deal with a local bandit group. When the player discovers his treason, he sides with the bandits and you're forced to kill them all. He's actually pretty tough, being a relatively high level enemy in a starting area of the game.
* In the wii flight game ''VideoGame/InnocentAces'' [[spoiler: Orishima does this after a mock battle with the player because she had so much fun that she wanted a rematch]].
* Something similar to Sophitia above happened in ''VideoGame/BlazBlueContinuumShift''. [[spoiler:By the end of the series, [[ChineseGirl Litchi Faye-Ling]] is [[ForcedIntoEvil forced to join the bad guys' side]], since the bad guys kept the lover she's been trying to cure (Arakune) as a hostage and they had the cure she badly wanted, and she has to join if she wants both the cure and that lover. Throughout the series, she's usually one of the genuinely good characters.]]
** Also, thanks to a case of LoveMakesYouCrazy and some mental manipulation from [[BigBad Hazama]], there's [[spoiler:[[LadyOfWar Tsubaki Yayoi]].]].
* Jan Kurtas/Medusa in ''VideoGame/{{Odium}}'' was a victim of ViralTransformation that turned him into a monster, but - unlike all other townspeople - he did not become an insane killing machine. Unless you blunder into the (entirely avoidable) scripted sequence where he finally succumbs and attacks you. (You can get an OptionalPartyMember as a replacement afterwards.)
* [[spoiler:Nathan Hale]] in ''VideoGame/{{Resistance}} 2'', succumbing to TheVirus in the ending. [[MercyKill Though only briefly]].
* ''VideoGame/NieR'' has two examples.
** First, [[spoiler:the Twins, Popola and Devola are initially major allies in Nier's quest, but late in the game turn out to be two of the story's central villains.]]
** Secondly, [[spoiler:In the path to endings C and D (which is only possible by obtaining every weapon on a NewGamePlus), Kaine's Shade half takes full control over her, turning her into the FinalBoss.]]
* At the end of the second ''VideoGame/InazumaEleven'' game, [[spoiler:most of the Raimon Eleven members that were forced out off the team throughout the game (except Gouenji, whose bus came back earlier) become The Dark Emperors after [[TheStarscream Kenzaki]] gives them fragments of [[MagicMeteor The Aliea Meteorite]], which gives them superhuman strenght, but [[DrunkOnTheDarkSide sacrifices their good selves for that]]]].
* Dan Stewart in ''VideoGame/WinBack: Combat Operations''.
* ''VideoGame/DoubleDragon'', in which Billy and Jimmy fight side-by-side through everything to rescue the girl, only to find that Jimmy is indeed the BigBad.
* [[spoiler:Wheatley, who becomes DrunkWithPower after the core transfer with [=GLaDOS=]]] in ''VideoGame/{{Portal 2}}''. In fact, the audio files for these lines have "heel turn" in their names. [[spoiler:It's especially painful because the betrayal happens actively onscreen, with him suddenly and dramatically JumpingOffTheSlipperySlope. You can actually pinpoint the exact moment when the power drives him crazy.]]
-->[[spoiler:'''Wheatley''']]: ''(in awe)'' This [[spoiler: body]] is AMAZING! I can't get over how small you (Chell) are! But I'm HUGE! Ha... Aha... Ahahah[[EvilLaugh HAHAHAHAHAHAHAHAHAHAAAA]].
* In the WebGame ''[[VideoGame/{{TCT RPG}} The Colour Tuesday,]]'' Paige tries to seize the [[ChekhovsGun guitar of Alex's disappeared brother]] when she tries to claim it.
* In ''VideoGame/NightTrap''...[[spoiler:you, in the perfect ending. [[https://www.youtube.com/watch?v=HnVKqlyjz7s If you are so inclined.]]]]
** [[spoiler: You don't even go that fair. Just let one of the Martins escape during the final sequence and kick back and watch the fun. You get the same ending either way.]]
* ''VideoGame/SepterraCore''. Selina, when [[spoiler: she saw Doskias almost getting killed by one of the good guys]]. Actually, she goes back and forth a few times throughout the game.
* Marty "Monk" Malone is a loyal Corleone enforcer and a good friend of the protagonist in the video game adaptation of ''VideoGame/TheGodfather''. When [[spoiler: his sister is murdered late in the game]] to get at the protagonist, Monk becomes embittered and eventually turns traitor, forcing the player to kill him.
* Clyde in ''VideoGame/{{Vigilante 8}}'' goes from a member of the Vigilantes opposing [[CorruptCorporateExecutive OMAR]] and their thugs to the CEO of OMAR who stole a time machine to kill his former leader and ensure the submission of the US in the sequel thanks to [[spoiler: finding [[BrainwashedAndCrazy Houston]]'s mind control bracelets in a service station bathroom.]]

* ''Franchise/TheElderScrolls''
** According to the developer-written obscure text ''[[https://www.imperial-library.info/content/seven-fights-aldudagga The Seven Fights of the Aldudagga]]'', this is the case for Mehrunes Dagon, the [[OurGodsAreDifferent Daedric Prince]] of [[DestroyerDeity Destruction]] who serves as either the BigBad or GreaterScopeVillain for several games in the series. According to the ''Seven Fights'', Dagon was once a kindly demon who attempted to protect parts of Mundus (the mortal world) from being eaten by [[BeastOfTheApocalypse Alduin]] at the end of every "kalpa" (cycle of time). Alduin found out and then [[IronicHell cursed Dagon]] into this state:
--> '''Alduin:''' ''"You I curse right here and right now! I take away your ability to jump and jump and jump and doom you to [the void] where you will not be able to leave except for auspicious days long between one and another and even so only through hard, hard work. And it will be this way, my little corner cutter, until you have [[OmnicidalManiac destroyed all that in the world]] which you have stolen from earlier kalpas, [[ImpossibleTask which is to say probably never at all!]]"''
** During the Merethic Era, The Dragon Cult was an [[{{Precursors}} Atmoran]] religious sect led by the Dragon Priests, mortals granted some measure of power and authority by the dragons they worshiped. In Atmora, the Dragon Priests kept peace between the dragons and mankind. However, during or soon after the Atmoran migration to Tamriel, the Cult became much more [[ReligionOfEvil malevolent]] for reasons lost to history, but theorized to be related to Alduin's desire to TakeOverTheWorld instead of [[TheEndOfTheWorldAsWeKnowIt destroy it]]. The Cult's cruelty soon rose to rival that of the dragons themselves, and the Dragon War was fought to defeat both the Cult and Dragons. After Alduin's defeat, the Dragon Cult was driven underground, eventually eliminated entirely, and many cultists were cursed with undeath for their crimes. Following Alduin's return in the 4th Era, the Dragon Cult's followers are rising again, [[RiseFromYourGrave quite literally]], just like [[NotSoExtinct the dragons themselves]].
** ''[[VideoGame/TheElderScrollsIIIMorrowind Morrowind]]'':
*** In the {{backstory}}, BigBad Dagoth Ur was, as the mortal Voryn Dagoth, a trusted advisor to the ancient Chimeri/Dunmeri hero, [[FounderOfTheKingdom Lord Nerevar]]. [[TheRashomon Though there are many different versions of events]] from WhenItAllBegan, most have Dagoth aiding Nerevar in infiltrating the [[OurDwarvesAreDifferent Dwemer]] Red Mountain stronghold. There, they found the [[CosmicKeystone Heart of Lorkhan]] and the [[ArtifactOfDoom Tools of Kagrenac]], with which the Dwemer attempted to tap into the Heart's power but caused their entire race to disappear mysteriously. Dagoth was tasked with guarding the Tools while Nerevar consulted with his other advisors, the Tribunal, and his [[OurGodsAreDifferent Daedric patron]], Azura. However, Dagoth was corrupted by the Heart and Tools, using them to become a PhysicalGod. His physical form was destroyed by either Nerevar or the Tribunal depending on the telling, but he coalesced in the millennia that followed before returning. (One telling of the events has him as a FallenHero and WellIntentionedExtremist, refusing to let the Tribunal use the Tools after they murdered Nerevar, and only used them himself out of spite due to their betrayal.)
*** In the ''Tribunal'' expansion, this is revealed to be the case for [[PhysicalGod Tribunal deity]] [[spoiler:Almalexia]], who serves as the expansion's BigBad. In ages past, she heroically defended Morrowind against Daedric, Akaviri, and Imperial threats. However, after she and the other Tribunes were cut off from the Heart of Lorkhan, the [[DeityOfHumanOrigin source of their divine power]], they've been steadily weakening. Finally, as a result of the main game's main quest, [[spoiler:she is cut off from the Heart permanently]]. The ''loss'' of her divine powers causes her to GoMadFromTheRevelation. [[spoiler:She kills fellow Tribune Sotha Sil, tries to kill [[PlayerCharacter the Nerevarine]], and plans to kill her other fellow Tribune Vivec]].
** Between the events of ''[[VideoGame/TheElderScrollSIVOblivion Oblivion]]'' and ''[[VideoGame/TheElderScrollsVSkyrim Skyrim]]'':
*** The [[LizardFolk Argonians]] pull one of these if one considers [[TheFederation the Septim Empire]] as the "face" side of things and the [[AntiHumanAlliance Aldmeri Dominion]] as the "heel." (Which, while the Empire has its flaws, is still very much the [[BlackAndGrayMorality "gray" to the "black"]] of the [[ANaziByAnyOtherName outright fascist]] Dominion.) After [[ChekhovsVolcano Red Mountain's eruption]], the Dominion influenced the Argonians to attack Morrowind and [[SlaveRace get revenge over millennia of slavery]] and to free the remaining illegal slaves there, as well as to capture Morrowind's valuable [[FantasyMetals Ebony deposits]]. The Dominion profited in further weakening the Empire by tearing away two more provinces (Argonia seceding and then capturing what was left of Morrowind).
*** Likewise, the Dominion convinces the [[CatFolk Khajiit]] of Elsweyr to abandon the Empire and join their side of the conflict as a client state through some clever manipulation (and maybe some outright BlatantLies).
* Both [[spoiler:Dr Sorkin and Yoder]] turned on the team for their selfishness in episode 4 of ''VideoGame/JurassicParkTheGame''.
* Both [[spoiler:Jaesa Wilsaam]] and [[spoiler:Nomen Karr]] in ''Videogame/StarWarsTheOldRepublic'' did this the first to join you and the second to kill you...3 times
* In the second to last route of ''VideoGame/DuelSaviorDestiny'' [[spoiler:Selbium Volt]] turns on Taiga due to [[spoiler:first blaming him for Mia's 'death']] and when that turns out not to be the case he still blames him for ...something or other and gets even more antagonistic. [[spoiler:And despite Taiga attempting to show him mercy, he tries to stab him in the back after the DuelBoss fight and gets killed for his trouble.]]
* ''VideoGame/MortalKombatDeception'' sees Kabal actually ''reverting'' to his bad guy ways and ''running'' with it. After being rescued from death by the Chaos cleric Havik, Kabal is convinced to resurrect the criminal Black Dragon clan. He then finds Mavado (the Red Dragon thug who put him at Death's door), pays him back double, steals back his hookswords (which "feels good" for him to hold again) and then hires young, methodical killers to transform the Black Dragon from a band of pirates into a nihilistic organization determined to overthrow civilization. And Heaven help you if you don't fit Kabal's criteria of what a Black Dragon should be.
** ''VideoGame/MortalKombatX'' sees several good characters go heel. [[spoiler:Kung Lao, Kitana, Smoke, Kabal, Stryker, Nightwolf, and Liu Kang end up staying as revenants, when Scorpion's vengeance on Quan Chi results in a HeelFaceDoorSlam. Raiden himself goes rogue, after his HeroicSacrifice at the end of ''MKX''.]]
** In ''VideoGame/MortalKombat11'', Frost, once Sub-Zero's most promising pupil, has joined Kronika, Sektor and the Cyber Lin Kuei, turning Sub-Zero's ninjas into Cyber Lin Kuei and seeking to destroy the Shirai Ryu and carry out Kronika's evil will. Sub-Zero is saddened and disappointed at [[APupilOfMineUntilHeTurnedToEvil what his former student has become]].
* In ''VideoGame/SlyCooperThievesInTime'', the villainous Black Knight terrorizing Medieval England is revealed to be [[spoiler: Penelope, a supporting character and ally in [[VideoGame/Sly3HonorAmongThieves the previous game]] and love interest of Bentley. She has gotten tired of Bentley "wasting" his brain power with the Cooper Gang, and gives her boyfriend's time machine plans to the BigBad in order to gain profit, kickstarting the entire plot of the game.]]
* Karnov has a do-it-yourself variation of the trope; He was the first boss in ''VideoGame/BadDudes'' and the final boss in ''VideoGame/FightersHistory''.
** Chelnov from ''VideoGame/AtomicRunner'' did this trope himself as the final boss of ''VideoGame/FightersHistory: Mizoguchi Kiki Ippatsu''.
* In ''VideoGame/TheNightOfTheRabbit'' the BigBad [[spoiler:Great Zaroff]] and his mentor [[spoiler:Marquis de Hoto]] were heroes until some years prior the events of the game.
* Happens to [[spoiler: Salem]] in the 3rd game ''VideoGame/ArmyOfTwo: The Devil's Cartel'', and he is also the final boss in the game.
* In ''VideoGame/KidIcarusUprising'', [[spoiler: Pyrron]] is just your everyday, LargeHam, [[KillItWithFire fire happy]] [[spoiler: sun god]]. He's just about the only guy who knows what the [[spoiler: Aurum]] are all about, and while he's mostly an idiot, he certainly knows how to make them hurt. [[spoiler: Until you reach the Aurum brain, and in the middle of the boss fight he dives right in and completely takes over the alien hive mind.]]
-->[[spoiler: Pyrron]]: "I've leveled up! I'm a Level Infinity Epic Super God...PLUS!"
* In ''VideoGame/AWitchsTale'', Loue seems to undergo this temporarily when you fight him for his doll.
** In the NewGamePlus, [[spoiler:Anne grows up to become the Eld Witch]].
* ''VideoGame/YuGiOhReshefOfDestruction'' has Pegasus, due to [[spoiler:Reshef's possession]].
** The Big Five turn bad when the Rare Hunter defeats Kaibaman. But when you defeat him, the Big Five become good again.
* In the True Mastermind Edition of ''[[VideoGame/TimeCrisis Time Crisis 5]]'', it is revealed that [[spoiler: Robert Baxter, one of the protagonists from ''Time Crisis II'' is the BigBad of the game, having turned his back on the VSSE and gone rogue, selling VSSE intelligence to terrorist organizations around the world. Three months before the events of the game, he killed Christy Ryan, the DamselInDistress from the second game who had been investigating the traitor's identity. He proceeded to frame his ex-partner Keith Martin as the traitor and Christy's murderer. Note that [[KickTheDog Christy Ryan happened to be Keith's girlfriend]].]]
* In ''VideoGame/OverlordI'', all of the Seven Heroes have become evil in some way. From a fallen paladin running a pleasure cult to a halfling king starving nearby villages to feed his appetite, all of them have fallen to darkness, to the point where an EvilOverlord can come across as an improvement. [[spoiler:Since the Overlord is the eighth Hero, this also applies to the Overlord.]]

* ''VideoGame/TelltalesGameOfThrones'': The traitor on your council turns out to be [[spoiler: the man you chose not to become your sentinel; Ser Royland or Duncan]]. They betray you because they blame ''you'' for instigating the war with the Whitehill's because of your poor leadership.
* In ''VideoGame/DawnOfWar II: Chaos Rising'', the squad member with the highest [[KarmaMeter Corruption]] will do this. If none of them have any corruption then [[spoiler:[[MissionControl Techmarine Martellus]] will betray the Blood Ravens instead. ''Retribution'' confirms that the canonical traitor was [[TheBigGuy Avitus]].]]
* In ''[[VideoGame/MysteryCaseFiles Mystery Case Files: Return to Ravenhearst]]'', you have to rescue the souls of Gwendolyn and Charlotte Somerset, two young, innocent girls that died over a century ago, and they are brought back to life in ''Escape from Ravenhearst'', after helping you defeat the villain. But when you return once again to the manor in ''Key to Ravenhearst'', they have become psychopathic monsters that helped their [[EvilPatriarch evil grandfather]] to gain immortality by murdering dozens of people. Lampshaded by the Master Detective:
-->'''The Master Detective''': "The two beauties have become a gruesome twosome. What happened to them?"
* In ''VideoGame/DarkSouls'', almost anyone can become a hostile zombie after they become hollow, but a few go a bit beyond that. For example, the Way of White starts out as a religion devoted to maintaining the bonfires, but is eventually taken over by [[SinisterMinister Pontiff Sulyvahn]], who is TheHeavy for ''VideoGame/DarkSoulsIII'', and ends up becoming monstrously violent and cruel as the Church of the Deep.

* ''VideoGame/SpiritsOfAnglerwoodForest'': [[spoiler: Ezra, after having his spirit corrupted, becomes the BigBad and sets his sights on his family.]]
* One could consider that [[spoiler: the purple Onky]] does this at the end of ''[[VideoGame/{{Grow}} Grow Cinderella]]'' as he [[spoiler: steals the magic staff of the fairy godmother after getting a more demonic appearence and go with Cinderella in the place of the Prince.]] The interface even says that [[spoiler:he and all the other objects are "Level Evil"]].
* ''VideoGame/DragonQuest'':
** ''VideoGame/DragonQuestI'': Potentially. The Dragonlord offers the hero a chance to rule over the world alongside him at the end of the game. Most players just select no and get on with the battle, but if you accept, you get a Non-Standard Game Over (except in all subsequent rereleases where he wakes up in a town near the Big Bad's castle, where the innkeeper says that he had a Bad Dream). The idea of selecting "yes" was one of the big eventual inspirations for ''VideoGame/DragonQuestBuilders''.
** ''VideoGame/DragonQuestIX'': Subverted. After Aquila goes missing, his first reappearance features him commandeering all the Fyggs you've collected... for ''the Gittish Empire''. And yet, Apus Major reveals that Aquila returned the Fyggs to the Observatory later. This is because he's a Fake Defector, attempting to bring the Gittish Empire down himself.
* The Guardians of ''VideoGame/{{OFF}}'' are all evil, ranging from the BadBoss Dedan to the MaddenedIntoMisanthropy Japhet to the CorruptCorporateExecutive Enoch. [[spoiler:However, Chapter 4 of The Room shows that the three of them were once nice people who genuinely wanted to revive the world to make it a better place. Unfortunately, in the present day they are either disillusioned or delusional.]]
-> [[spoiler:'''Room!Dedan''']]: The future only waits if we trace it, and just our arms and our efforts'll make it a heaven on Earth.

* Ghaleon in ''VideoGame/LunarTheSilverStar''. He was one of the Four Heros along with his friend and rival, Dragonmaster Dyne. In the original version, he becomes embittered over Dyne's supposed death and plots to TakeOverTheWorld to get back at the goddess Althena. The remakes change Ghaleon's motivation to him wanting to becomes a DarkMessiah in Dyne's absence.

* Queen Ashlelei in ''VideoGame/{{Malicious}}'', the once great and respectable ruler turned into a ravaging war demoness after a series of traumatic events, her two chilren being killed by her husband, King Eldrake their father, in front of her is one of these events to name.

* Ghaleon in ''VideoGame/LunarTheSilverStar''.
** [[spoiler:And again]] in ''VideoGame/LunarEternalBlue''.

* The [[BigBad villain]] from the very first ''[[VideoGame/FinalFantasyI Final Fantasy]]'', Garland's {{backstory}} states that he was once a famous hero. [[FaceHeelTurn That all changed]] when he kidnapped the princess of Cornelia in a bid to take over the kingdom.
* Kain from ''VideoGame/FinalFantasyIV'', partly because of brainwashing, but also partly because of his envy for his best friends Cecil, who was the boyfriend of the girl he had a crush on.
* Sephiroth in ''VideoGame/FinalFantasyVII'' goes through a particularly malignant FaceHeelTurn in the main character Cloud's [[StartOfDarkness flashback]]...the awesomeness of which also made him the ultimate DracoInLeatherPants character.
** The PSP game ''VideoGame/CrisisCore'' (where you play as Zack, the guy Cloud absorbed the personality of) portrays this moment at the end. You even get to see Sephiroth before he went batshit. There's quite a few of the villains that do a HeelFaceTurn.
** Dyne is an EvilFormerFriend to Barret. When [[EvilCorp Shinra]] betrayed and destroyed Barret and Dyne’s hometown in the BackStory, Dyne was seemingly killed, leading Barret to adopt Dyne’s daughter Marlene while joining the EcoTerrorist group Avalanche to fight Shinra. Except it turns out that Dyne survived and subsequently went insane, attracting the attention of Cloud’s group by going on a murder spree through the Gold Saucer, and then [[SuicideByCop threatening to murder his own daughter Marlene to force Barret into dueling him to the death]]. More or less, Shinra drove him so far past the DespairEventHorizon that he turned into an AxCrazy DeathSeeker who ultimately [[WoobieDestroyerOfWorlds turns out to be incapable of caring about anything or anyone anymore]], and kills himself after Barret defeats him in combat.
* Seifer in ''VideoGame/FinalFantasyVIII'' goes through a much more low-key version of this as well.
* In ''VideoGame/FinalFantasyTacticsA2'' there's a pair of paladins who were known for the superb swordsmanship and skills in combat. However, one of the paladins, Frimelda, is superior to her other paladin friend, Luc Sardac, in battle skills. Luc Sardac tries his best to match his skills with Frimelda's, but he could never get any better. Rather than accepting his limitations, Luc Sardac decides to kill Frimelda so that he would be the superior paladin. It didn't stick due to Frimelda's sheer force of will keeping her alive, but as a zombie. When the zombified Frimelda and your party confront Luc Sardac over what happened, he decides to attack you.

* The Guardians of ''VideoGame/{{OFF}}'' are all evil, ranging from the BadBoss Dedan to the MaddenedIntoMisanthropy Japhet to the CorruptCorporateExecutive Enoch. However, Chapter 4 of The Room shows that the three of them were once nice people who genuinely wanted to revive the world to make it a better place. Unfortunately, in the present day they are either disillusioned or delusional.
-> '''Room!Dedan''': The future only waits if we trace it, and just our arms and our efforts'll make it a heaven on Earth.

-> '''Dedan''': The future only waits if we trace it, and just our arms and our efforts'll make it a heaven on Earth.

* In ''VideoGame/NeverwinterNights2'', [[spoiler:Neeshka, Sand and Qara will betray you at the end of the game if their influence is too low. And if you manage to keep Sand, Qara will automatically betray you and vice versa. The Sand-Qara conflict is explained by [[DummiedOut/RolePlayingGame deleted content]] though.]]
** And [[spoiler:Bishop]] does so even earlier. He never was much of a Face to begin with. [[spoiler:Though he ''can'' be persuaded to [[ScrewThisImOuttaHere back out of]] the final fight.]]

* [[spoiler:Aribeth de Tylmarande]] of VideoGame/NeverwinterNights does this. [[spoiler:Bastila from ''VideoGame/KnightsOfTheOldRepublic'']] was [[spoiler:Aribeth]] dropped into an alternate setting and given a more active role in the story.