[[quoteright:310:[[{{Satan}} http://static.tvtropes.org/pmwiki/pub/images/fallen_hero.jpg]]]]
[[caption-width-right:310: Dang, older than time...]]

->''"You either die a hero, or you live long enough to see yourself become the villain."''
-->-- '''[[ComicBook/TwoFace Harvey Dent]]''', ''Film/TheDarkKnight''

Not all {{Villain}}s [[RousseauWasRight are born]]. Some are made, and none are more {{trag|edy}}ic than the Fallen Hero. As the name implies, the Fallen Hero used to be a {{hero|es}} before doing a FaceHeelTurn. They may even have been an IdealHero or another equally optimistic {{archetyp|alCharacter}}e, up until the moment when they [[TraumaCongaLine suffered]] [[FreudianExcuse something bad enough]] for them to [[DespairEventHorizon lose all faith in good and idealism]], be it [[CynicismCatalyst the loss of a loved one]], too many [[NoGoodDeedGoesUnpunished good deeds]] coming back [[BeingGoodSucks to bite them hard]], [[EtTuBrute betrayal]] by [[BigBadFriend someone they trusted the most]], too much [[DividedWeFall distrust from those who should have been allies]], or some other faith-shattering event. It might even be a drawn out process of seduction to TheDarkSide or fall from grace.

What they choose to do about it determines what they become:
* If they [[TheStoic retreat into themselves]] and fight evil mercilessly to dull the pain, they become an AntiHero, though if this fight is motivated by vengeance, they may run the risk of [[HeWhoFightsMonsters becoming like the very monsters they have sworn to destroy]].
* If the loss of faith with humanity and/or society and government makes them decide to [[UtopiaJustifiesTheMeans do something drastic to "fix" it]], they become an AntiVillain, most commonly a KnightTemplar or DarkMessiah.
* Alternately, if they just [[JumpingOffTheSlipperySlope jump off the slippery slope]] and [[OmnicidalManiac embrace chaos and the destruction of humanity]] as [[WoobieDestroyerOfWorlds the only solution to their pain]], they'll become a straight up [[EvilLaugh cackling]] CardCarryingVillain. Especially those who only became a hero for fame and glory, rather than for any good cause.
* Or they'll be like a fusion of the second and third example and decide that killing/destroying everything is the ONLY way to save EVERYONE from the pain/pointlessness of existence, often becoming a StrawNihilist and an OmnicidalManiac.
* They might withdraw from society, become [[TheHermit a hermit]] or [[TheAlcoholic drunkard]], and [[HeroicNeutral ignore the ongoing state of the world]]. If the current generation of heroes meet them, the fallen hero will mock how their deeds are useless. Most likely, however, [[CynicalMentor they will help the new heroes in the hopes that they won't suffer the same fate]].

They'll use their not-inconsiderable powers and abilities to do it, too. Often, they'll twist [[HealingHands healing powers]] to evil ends, or allow pain to fester by simply denying the use of their powers for good. Where once the BarrierMaiden wanted to heal the world, she'll now spread misery to [[ApocalypseMaiden speed its destruction]]. The MessianicArchetype who wanted to save the world now [[TheAntiChrist wants its damnation]]. TheGunslinger, once wanting to bring justice to the frontier, now wants nothing but vengeance and blood. Many of these made the [[ProtagonistJourneyToVillain protagonist's journey to villainy]].

Usually revealed in a NotSoDifferent moment. Almost always gets a StartOfDarkness, and often implies BecameTheirOwnAntithesis. Christopher Booker's [[Literature/TheSevenBasicPlots sixth basic plot]], {{Tragedy}}, uses this character arc, with the Fallen Hero as main character. Compare FaceHeelTurn, TheDarkSideWillMakeYouForget. See also FallenAngel, TragicVillain, and TragicMonster. SuperTrope to TheParagonAlwaysRebels, in which the character has such influence over other good guys that they fall with him or her. When the Fallen Hero used to be a main character in a previous work, they're a RogueProtagonist.



[[folder:Anime & Manga]]
* Gendo Ikari from ''Anime/NeonGenesisEvangelion'', as once [[spoiler:Yui dies, he retreats into himself and becomes a ManipulativeBastard and TheDragon to SEELE]].
** Shinji Ikari from ''Anime/RebuildOfEvangelion'' fits this much better, as unlike Gendo he was genuinely saving the world [[spoiler: until Gendo tricked him into dooming humanity.]]
* ''Anime/YuGiOhGX'': Judai's HeroicBSOD causes him to transform into the villainous Supreme King once he decides to use evil's methods to fight evil itself, complete with a literal gaggle of Fallen Heroes (evil versions of his normal Elemental Heroes).
* In ''Anime/YuGiOh5Ds'', Rex Godwin qualifies. [[spoiler:Before he became the tyrannical head of Security, he was the legendary Mysterious D-Wheeler who tried to build the Daedalus Bridge and connect Satellite to Neo Domino, hoping to free the residents of Satellite from the oppression of the upper class. But Security had other ideas. When they tried to arrest him, he drove his D-Wheel off the incomplete bridge, vanishing, becoming a martyr to everyone who followed him. In a sense, when he became a Dark Signer, he was a WellIntentionedExtremist, who sought to put a stop to the conflict between good and evil that seemed doomed to repeat itself endlessly. When he was [[KilledOffForReal finally defeated]], the Daedalus Bridge was completed as a modern bridge, and stands as a symbol of the man he once was.]]
* Nina from ''Anime/MaiOtome'' takes this to its literal extreme. At first, she was the top student in her class with a promising life ahead of her, and then [[LoveMakesYouEvil she went crazy when she thought that Arika was trying to steal the man she loved]]. From there, she [[spoiler:accidentally killed one of her best friends when she turned out to be TheMole, and purposefully killed tens of thousands more to prove her devotion]], ending with her reputation in tatters, [[spoiler:him on his deathbed, and the memories of the two of them ever having met lost forever]], and a loss in the final battle that ends with her ''[[SpaceDoesNotWorkThatWay falling from outer space]]''.
* Sensui from ''Manga/YuYuHakusho''. [[spoiler:Was a Spirit Detective, and a damn effective one, until he saw [[HumansAreTheRealMonsters the Black Black Club torturing demons for their own amusement]], got his hands on [[PostHistoricalTrauma Chapter Black]], and went [[NietzscheWannabe insane with the desire to get rid of all of humanity]].]]
* ''Manga/{{Pretear}}''. Along with [[spoiler:the revelation that the Princess of Disaster is the current form of the last Prétear, Takako]], the show also plays with the possibility that [[spoiler:''anyone'' who becomes the Pretear could become the Princess of Disaster. Which naturally leads Himeno Awayuki, the current Prétear, straight into a HeroicBSOD while she sorts it out.]]
* ''Anime/MobileFighterGGundam'':
** Gentle Chapman was one of the most admired Fighters ever, but [[spoiler:after old age and an illness caught up with him, he could only win via cheating (perpetrated without his knowledge by his wife). He paid for it by dying...and was revived as a zombie by the Devil Gundam.]]
** Master Asia also falls under this. He was formally a part of the Shuffle Alliance, a group that was devoted protecting humanity from self destruction, and [[TheHero Domon Kashu's]] mentor. [[spoiler:But during the previous Gundam Fight, he saw how badly the Fight damaged the Earth and blamed humanity for despoiling their homeworld so carelessly. After meeting the Devil Gundam, he joined its plan to wipe out humanity, believing that it was the best path for life on Earth to survive.]]
** Also Devil Gundam. It was built as nanomachine colony to restore Earth's environment, but [[spoiler: Ulube]] wanted to use it as a weapon. When it escaped to Earth, the impact messed with its A.I and turned it into an EldritchAbomination.
** [[spoiler: ''Ulube'' himself]] seems to fit in as well. He seems to have been genuinely heroic, if proud, until [[spoiler: he lost to Master Asia, let his bruised pride get to him, and then began to plot to get more and more power... ]]
* ''Anime/MobileSuitGundam00'''s BigBad, [[spoiler:Ribbons Almark]], seems like this, considering that [[spoiler:he was a Gundam Meister who piloted the very first Gundam in the series ''and'' saved Setsuna's life.]] It's actually a subversion, as he was never a hero. [[spoiler:The intervention when he saved Setsuna had no glorious goal beyond a field test of the 0 Gundam, and he was supposed to kill all witnesses. He only spared young Soran Ibrahim because he saw the devotion in the young soldier. And this incident triggered his god complex, leading him to become the BigBad.]]
* Gale Raregroove, Pumpkin Doryu, and Captain Hardner in ''Manga/RaveMaster''.
* [[spoiler:[=LordGenome=]]] of ''Anime/TengenToppaGurrenLagann'', who was Simon's predecessor. [[spoiler:[[EternalRecurrence One of them, anyway]].]]
** Same goes for [[spoiler:Guame]], who is ''Boota's'' predecessor.
* Griffith of ''Manga/{{Berserk}}'', once the closest thing the general universe had to a hero, but who is now [[spoiler:[[DarkMessiah the fifth member of the demonic Godhand, Femto]]]].
* In ''Anime/MagicalProjectS'', [[spoiler:the third candidate, Romio]], was a former magical girl [[spoiler:from Earth]], but she was unable to maintain the Good-Evil Balance. Because of this, she became bent on destroying Earth.
* In ''Anime/RevolutionaryGirlUtena'', [[spoiler:Dios]], aka Akio, shows what happens when the PrincelyYoungMan turns into one of these.
%%* ''GaReiZero'': Yomi [[MemeticMutation ;_;]]
* ''Anime/TransformersArmada'' has Wheeljack, and depending on who you talk to, Starscream could also be considered as this.
* ''Manga/{{Naruto}}'':
** [[spoiler:Nagato, aka Pain]] was born with a special power that marked him as a literal [[MessianicArchetype messiah]]. Inspired by the words of his childhood friends and mentor, he desired to bring about a lasting peace. However, [[spoiler:his pacifistic attempts left his friend Yahiko dead and him crippled]], shattering his dream. So, he set out to create a new peace, [[spoiler:by [[DarkMessiah sharing the pain that he had suffered]].]]
** [[spoiler:Hanzo]], his predecessor as the leader of [[spoiler:the Hidden Rain Village]], also started off with good intentions before he became a CrazySurvivalist.
** Sasuke Uchiha [[ProtagonistJourneyToVillain also becomes one of these over the course of the story.]]
** Belive it or not, even [[spoiler: Orochimaru]] qualifies. Although he'd die before admitting it, there was a time, before his defection, when he legitimately cared about his teammates and fought on behalf of his village. After seeing many people die in war, he became obsessed with gaining immortality and [[JumpedOffTheSlipperySlope lost any sense of ethics]].
** [[spoiler:Obito Uchiha soon after his "death" became [[BigBad Tobi]].]]
** The Nine Tailed Fox could be argued to be this. One of the legends mentioned about him by Jiraiya and a toad made him out to be some kind of supernatural natural disaster that emerged to punish mankind when they got too evil and sinful. As he's very much sapient, regardless of whether or not he's inside a host, and if there is any truth to the legend, that means he chose to seek out and destroy evil wherever it emerged. Considering that the Tailed Beasts were all thought of as nothing more than convenient power sources to be exploited, that means that he could have eventually gotten tired of that nonsense and played the part of the asshole embodiment of evil that he portrayed himself as to be left alone.
* [[spoiler:Oskar Von Reuenthal]] in ''Anime/LegendOfGalacticHeroes''. Particularly tragic, since he did not rebel against [[spoiler:Reinhard Von Lohengramm]] out of genuine malice or ambition, but because he was framed and was too proud to accept punishment for a crime he did not commit. His death is arguably the most senseless and undeserved in the entire series.
* ''Manga/UbelBlatt'' has a number of these, similar to the Overlord example further down the page. 14 heroes go to fight the Dark Lord. On the way there, 3 die heroically, and upon the entrance of the Evil Lair, 7 of the survivors get cold feet and stay behind. The other 4 go to defeat the villain, winning with great difficulty. Returning home, those heroes get ambushed by their former comrades and are bloodily murdered. They go on to become the "Seven Heroes, who defeated the Dark Lord and the '4 Lances of Betrayal'". The 7 Lances end up going insane with power, [[VillainWithGoodPublicity but can get away with anything because of their hero status.]] Though one of the 4 is back and wants revenge.
* ''Manga/{{Claymore}}'' has plenty of these since every warrior is doomed to [[EvilFeelsGood eventually succumb]] to her SuperpoweredEvilSide. However, the one who fits this trope the best is [[spoiler: Priscilla]] — once a gifted young warrior and WideEyedIdealist, she is now the terrifyingly powerful BigBad.
* The BigBad of ''Manga/{{Drifters}}'' is heavily implied to be this. Well, he's actually implied to be [[spoiler:Jesus Christ]] turned OmnicidalManiac. Plus, some of the Offscouring can qualify -- Joan of Arc becoming a [[KillItWithFire homicidal pyromaniac]] after being burned at the stake, for example.
* Aga Mbadi from ''[[Manga/{{Gunnm}} Battle Angel Alita: Last Order]]''. He was once a renowned hero around the solar system for hunting down a dangerous terrorist. After [[spoiler: being forced to watch the only woman he ever loved slowly die in his arms and acquiring his insane nemesis's brain chip]], he has turned into a ManipulativeBastard and NietzscheWannabe who considers everyone but himself lower than dirt.
* ''Anime/PuellaMagiMadokaMagica'' has not only one, but ''two'' Fallen Heroines. In fact, the story is arguably about the StartOfDarkness for one of them. And while we don't see their StartOfDarkness, it turns out that [[spoiler:''every single witch'' aside from former familiars was once a magical girl]].
** And in ''Anime/PuellaMagiMadokaMagicaTheMovieRebellion'' [[spoiler: the movie's protagonist [[ProtagonistJourneyToVillain becomes the series's]] [[SatanicArchetype new devil figure]].]]
* ''Manga/FairyTail'':
** Jellal, before his [[BrainwashedAndCrazy brainwashing]], was a legitimately heroic young boy, being the leader of the child slaves inside the Tower of Heaven and willingly risking his life to save Erza from torture and accepting it in turn. After Ultear corrupted him, he became the very antithesis of his original self, manipulative and self-serving so that he could revive the supposedly-dead [[GreaterScopeVillain Zeref]]. Even worse, Zeref wasn't even dead, so his plan wouldn't have succeeded even if he did win. After he finally breaks his brainwashing, he's horrified to realize what he's done and most of the world sees him as a horrible terrorist.
** After [[HeelFaceTurn having his alignment changed]] by the effects of Nirvana, it emerged that Hot-Eye of the Oracion-Seis was one of these. He originally just wanted to raise enough money to fund a search for his lost brother, Wally, but seemed to have gotten corrupted by his teammates somewhere along the line, though they themselves (sans Brain) [[TragicVillain were just as innocent, being fellow slaves of the Tower of Heaven alongside him]]. After all is said and done, he calmly accepts incarceration for his deeds while he was a villain, after finding out that the Fairy Tail guild members had met Wally not too long ago, and declares himself happy with the knowledge that he's alive and well.
** Hades was once a noble SociallyAwkwardHero named Precht, who was best friends with [[BigGood Guild master Mavis]] and was so heroic that he was chosen as her successor of the great wizard guild that would become Fairy Tail. Sadly, he would grow into a FauxAffablyEvil SmugSuper determined to find the DarkMessiah [[GreaterScopeVillain Zeref]] after the death of his beloved friend, becoming a monster in the eyes of his old team members for [[HeWhoFightsMonsters becoming everything he fought against.]] He was the one who was behind Jellal's own fall, for starters.
** Supposedly, [[spoiler: Gray]] is destined to grow into a villain some time down the line.
* ''LightNovel/FateStayNight'':
** Archer, [[spoiler:after his [[MagicallyBindingContract contract with the world]] and [[ArrestedForHeroism later his death]], became a [[AscendToAHigherPlaneOfExistence Counter Guardian]] whose sole purpose was the [[FinalSolution elimination of all humans within areas deemed a "threat to humanity"]] for all of eternity. Conflicting with his [[ChronicHeroSyndrome ideal]] of wanting to [[SurvivorGuilt save everyone]], this led to him eventually craving [[DeathSeeker his own death]] by [[KillingYourAlternateSelf killing himself in the past]] and being erased from existence due to [[TemporalParadox a paradox]]. ]]
* ''LightNovel/FateZero'':
** Berserker, [[EveryoneCallsHimBarkeep dubbed "Black Knight"]], [[spoiler:revealed in the final battle (by KingArthur ''[[SheIsTheKing herself]]'', no less) to be Sir Lancelot.]]
** Caster [[spoiler:is Gilles de Rais, a knight who fought along side Jeanne d'Arc, before descending into madness after her death and turning into a SerialKiller.]]
* Jinno from ''Anime/AfroSamurai''. He was Afro's best friend as they trained together for years, but one night under the Bodhi Tree, he witnessed all of his friends and fellow pupils killed by bandits, and then Afro coldly murdered their master to obtain the No. 2 headband. He blames Afro for everything that happened, and had his ruined body fitted with cybernetics to turn him into a formidable warrior. Before Afro can challenge Justice, he has to fight past his childhood friend.
* Lady Flair in the ''Anime/DirtyPairFlash'' universe, a Former WWWA agent and predecessor to the Current Lovely Angels who after a mission goes bad and felt betrayed went on to become an assassin , but makes an heroic sacrifice after realizing the truth of what happened.
* Suzaku from ''Anime/CodeGeass'' was the poster boy for what an Eleven can become in Britannian society. When Princess Euphie dies, he turns into the [[KnightTemplar White Grim Reaper]].
** [[AvertedTrope Averted]] for Lelouch, who chose to be a DarkMessiah Type-4 AntiHero the moment he could do anything (i.e., the moment C.C. gave him Geass). [[spoiler:It's played straight after [[LaResistance the Black Knights']] [[TheMutiny betrayal]], which coerces him into [[TheUnfettered abandoning]] [[MoralityChain his morality]] [[ZeroApprovalGambit and]] [[TakeOverTheWorld taking over]] [[TheEmpire his father's empire]].]]
* In ''Manga/FushigiYuugiByakkoIbun'', a prequel to ''Manga/FushigiYuugi'', the audience sees a kind and silent man named Nirusha, who helps a much abused little girl to start looking for her place in the world. Towards the end of the chapter, it's revealed that said man is none than [[spoiler: the horrifyingly cruel Miboshi from the original series.]]
* ''Manga/TokyoGhoul :Re'' gives two examples, both corrupted by [[AntiHumanAlliance Aogiri Tree]] over the course of the two-year TimeSkip between series. Hinami has gone from TheCutie that did her best to assist the heroes and wanted to live in peace with humans, to a BrokenBird that is a prominent member of Aogiri. She handles their intelligence network, and seems to have lost all compassion for humans. More extreme is the other example, [[spoiler: former PluckyComicRelief Seidou Takizawa. The idealistic Ghoul Investigator was ReforgedIntoAMinion, and has become a deranged HalfHumanHybrid that appears to have lost his humanity as a result of extensive torture. He gleefully explains that IAmAMonster, and goes on a killing spree on the orders of the BigBad]].
* ''Manga/AkameGaKill'': In a rather bizarre inversion, Kurome views Akame as a fallen warrior due to her sister undergoing a HeelFaceTurn and turning against TheEmpire they both stood for.

[[folder:Comic Books]]
* In ''Franchise/TheDCU'' series ''Justice League Task Force'', the hero, Triumph, was lost for decades in a time warp, and returned to join the Task Force as its leader. His difficulties in adapting to the new times, added to the desertion of Martian Manhunter and Aquaman from the TF's ranks (which caused the government to close it down due to the ''real'' Justice League returning), ended with him broke and being harassed by common thugs. The inadvertant loss of his soul left him NotHimself and he came under the influence of an evil 5th dimensional imp named Lkz, he wreaked havoc and mentally dominated his former allies into fighting the JLA. When he failed, he was frozen [[AndIMustScream screaming]].
** Interestingly, an alternate future shows Triumph's [[VitriolicBestBuds best friend, the Ray]], becoming one of these, with Triumph himself and the Flash (Bart Allen) as the only two heroes left, trying to keep him under control...[[GoKartingWithBowser while still being best friends and hanging out to watch sports and such.]]
* About a million alternate future stories depict either Franchise/{{Batman}} or Franchise/{{Superman}} as this, frequently with the other one trying to pull them out of it (to provide one of the most recent examples, the ''VideoGame/InjusticeGodsAmongUs'' game series and off-shoot comics).
* ComicBook/GodzillaRulersOfEarth: King Caesar and [[spoiler: Mecha-King Ghidorah]].
* ''ComicBook/TheLongHalloween'', the series that inspired Nolan when he was writing the script for ''Film/TheDarkKnight'', has a Harvey Dent that worked alongside Franchise/{{Batman}} and Commissioner Gordon. [[spoiler:We later find out that Harvey may not have even been responsible for some of the deaths, it may have been his wife trying to end all the terror that was happening and trying to get Harvey to come back. A closer inspection reveals plot holes with this revelation, and it's vague whether she did it or was just crazy.]] This is only one version of ComicBook/TwoFace's origin, but all the ones worth mentioning show him as working with Batman before turning into Two-Face.
* Both Sinestro and, later, his ArchEnemy, Hal Jordan, are GreenLantern Corps members who turned evil. Sinestro wanted to enforce order, so he became a KnightTemplar dictator of his home planet, Korugar. Years later, after seeing his home city nuked, among other things, Hal [[FreakOut Freaked Out]] and destroyed the Green Lantern Corps and tried to remake the universe. Hal was later {{retcon}}ned into being possessed by the AnthropomorphicPersonification of fear itself, and Sinestro was influenced by a demon telling him a prophecy that Korugar would destroy itself if order wasn't enforced.
* At the beginning of Creator/KevinSmith's ''Comicbook/{{Daredevil}}'' run, Karen Page was stuffed into a fridge. Then, Creator/BrianMichaelBendis took over and his identity was exposed to the public, and eventually, he was incarcerated for obstruction of justice. After beating the rap, his new wife, Milla, suffered a psychotic breakdown and the marriage dissolved (Matt cheating on her with Dakota North happened in between). By the time Lady Bullseye started to kill his closest allies to resurrect them as zombie ninja slaves, Matt finally said "screw this" and abandoned his life as Matt Murdock to become leader of the Hand. Though still a TechnicalPacifist, the crossover ''ComicBook/{{Shadowland}}'' changed this with Marvel promoting Daredevil as the new "greatest super-villain of the Marvel Universe".
* ComicBook/ThePunisher qualifies. Before becoming the KnightTemplar vigilante he's notorious for being, Frank was a veteran in the United States Marines Special Forces; for heroism in the line of duty, he was decorated with numerous medals, including the Purple Heart. The brutal attack that killed his family caused him to desert just hours before he would be awarded the Presidential Medal of Freedom.
* ''ComicBook/AstroCity'' has El Hombre, an {{Expy}} of Franchise/{{Batman}} from Los Angeles. Though he became prominent in the super-hero circle, he became upset at his lack of respect from the populace and his love interest's marriage to someone else. [[spoiler:He then hired a super-villain to build a robot to attack the city so he could stop it in a high-profile fight. He was betrayed by the villain, and when it was later revealed that El Hombre commissioned the attack, he became a wanted fugitive and disappeared into his civilian identity.]]
** Decades later, he tries a similar ruse, [[spoiler:killing low-level supervillains to unite their ilk against him, eventually gathering them all in one place, and wiping them out in his ''new'' heroic identity as El Guerrero]]. His former sidekick, Bravo, while being ashamed of El Hombre's actions, still holds a great deal of respect for the great man and the hero he once was.
* ''ComicBook/{{Shakara}}'': The BigBad responsible for most of the destruction was revealed to be [[spoiler:Cinnibar Brenneka, the heroic warrior who built the Shakara empire in the first place]].
* Richard Dragon, most famous for being the best martial artist in the DCU, was one of these for a while until Bronze Tiger dragged him out of it.
* ''ComicBook/AntMan'': Hank Pym becomes one of these (usually of the retired variety, but occasionally the AntiVillain version) every couple of years when something bad happens to Jan and/or Ultron does something horrible that he blames himself for.
* ComicBook/{{Magneto}} [[HeelFaceRevolvingDoor jumps around]] between this, AntiVillain, AntiHero, and WellIntentionedExtremist.
* From Marvel's GoldenAge, there was Thomas Halloway, the original Angel. In those times, he was a hero who fought the Nazis alongside the Sub-Mariner and the original Human Torch. But in modern times as an elderly man, he started to take morally questionable means of fighting criminals, financing and running the murderous vigilante group Scourges of the Underworld, which has assassinated a large number of lesser supervillains. (The worst part is, while he ran the group, the [[TheManBehindTheMan the Scourges ultimately reported to the Red Skull]], someone ''all'' the heroes of the Angel's time opposed.) The [=USAgent=] confronts him eventually in his mini-series; the former hero is wounded and arrested, as are many Sourges, but the Angel himself was released for lack of any concrete evidence. It was assumed he resumed a quiet life. Still, the heroic Angel lives on in [[LegacyCharacter the form of his grandson Jason]], who was given his costume during ''The Marvels Project'' limited series.
* ComicBook/BlackPanther was one of these (of the retired/bitter variety) at the end of Christopher Priest's run, but this development, and the [[SoapOperaDisease fatal brain aneurysm that caused it]], were both ignored by subsequent writers.
* ComicBook/{{Superboy}} Prime. He begins his career [[ComicBook/CrisisOnInfiniteEarths battling the Anti Monitor]], the DC Universe's greatest threat, and is immediately forced into Limbo with his home universe destroyed. After years in Limbo, he returns, convinced that Earth's heroes are screwing it all up and ultimately decides that this universe needs to be replaced by a better one.
* ComicBook/{{Supergirl}}, specifically the Linda Danvers incarnation, may or may not qualify. At the end of ''ComicBook/ManyHappyReturns'' she was forced to send to the ''original'' Supergirl back to her own reality, where she was DoomedByCanon. This left Linda broken and she promptly gave up the costume. A later series has her end up in Hell off-panel.
* ''ComicBook/{{Irredeemable}}'' centers around The Plutonian, a Superman-like superhero who snaps violently after a long and thankless career and proceeds to become the irredeemable BigBad set to obliterate the world that he once protected. Inversely, there's the spin-off ''Incorruptible'', which focuses on former Supervillain Max Damage who, in the wake of The Plutonian's rampage of destruction, decides to [[HeelFaceTurn become a hero]].
** Irredeemable is written by Creator/MarkWaid, who co-created Triumph (mentioned above), and has confirmed that a lot of the original ideas behind Triumph (who Waid wrote very little of) ended up in Irredeemable.
* ''ComicBook/SinCity'' has [[spoiler: Jack Rafferty]], who was once a hero cop but eventually degraded to the level of an alcoholic BastardBoyfriend. WordOfGod states that his story will eventually be told.
* In ''ComicBook/AllFallDown'', [[spoiler:Pronto]] gradually becomes this for the climax.
* ''ComicBook/MyLittlePonyFriendshipIsMagicIDW'': [[spoiler:Rarity, who succumbs to the Nightmare Force's MoreThanMindControl to become their new queen. She returned to the good guys' side at the end of the Nightmare Force arc though.]]
* In ''ComicBook/{{WITCH}}'' Nerissa used to be the leader of the previous generation of Guardians and the Keeper of the Heart before letting herself be corrupted and murdering Cassidy, who had replaced her as the Keeper because the Oracle had seen she was letting herself being corrupted and hoped to prevent this. Also, Will, the leader and Keeper of the current generation, ''fears'' to become this since she faced Nerissa, but managed to stay on the side of good.
* While still a "hero", Rorschach from ''ComicBook/{{Watchmen}}'' became a murderous vigilante after failing to save a girl killed by her kidnapper.
* Mikey Rhodes, the main protagonist in ''ComicBook/{{Birthright}}''. He was just a kid forced into the TheChosenOne's role to save a fantasy realm from [[EvilOverlord God-King Lore]]. During their destined confrontation, he failed to defeat his arch-enemy and [[DealWithTheDevil struck up a bargain with him instead]] to send him back home, and in turn, he would become his agent. Its later revealed that [[spoiler:Lore himself also qualifies, as he was the chosen one before and he already saved his realm in the past, but ''something'' that turned him into what he is today.]]
* Halfway through ''[[Franchise/StarWarsLegends Star Wars]] ComicBook/{{Legacy}}'', [[BigBad Darth Krayt]] is revealed to be [[spoiler:A’Sharad Hett, a Clone Wars-era Jedi Master who survived Order 66 and later fell to the dark side]].

[[folder:Fan Works]]
* In the ''WesternAnimation/MyLittlePonyFriendshipIsMagic'' alternate continuity ''Fanfic/TheEquestriaChronicles'':
** This role is filled by Princess Celestia, who slowly goes mad from the anxiety of having to constantly watch out for threats to her reign, and the psychological trauma of [[spoiler: her internal struggle with the dark magic she accepted in order to live forever and create the cutie mark spell]].
** Princess Luna also falls victim to this, as she becomes the KnightTemplar Nightmare Moon, hoping to put an end to the excesses and abuses of freedom that her sister has caused. In the end, [[spoiler: Celestia decides to eliminate her sister rather than accept her help with ruling the kingdom]].
* In the ''Pokémon'' fanfic ''Fanfic/{{Pedestal}}'', [[spoiler: Nick]] becomes one of these after [[spoiler: learning that his brother was killed.]]
* In ''WesternAnimation/JackieChanAdventures'' stories that are part of ''Fanfic/ProjectDarkJade'', Jade either becomes an example of this trope or is in the danger of becoming one.
** In ''Fanfic/QueenOfAllOni'', Jade becomes this after a spell reawakens her Queen of the Shadowkhan persona. And then in the second half of the story, [[spoiler: Jade kidnaps Viper and performs a ritual that transforms her into [[TheDragon Hebi]], the new General of the [[EliteMooks Samurai Khan]], and [[BrainwashedAndCrazy conditions her]] to be [[UndyingLoyalty utterly loyal]] to Jade.]]
** The same thing happens in ''Fanfic/{{Webwork}}'', which is then compounded by Jade spending several years (courtesy of NarniaTime that makes it only a few hours on Earth) in [[EldritchLocation the Emptiness]] with only [[ManipulativeBastard Tarakudo]] and [[EvilMentor the Old Queen]] as company, while being further transformed into a Shadowkhan/[[SpiderPeople Jorogumo]] hybrid. By the time she returns to Earth, her morality has been completely twisted.
%%* Franchise/HarryPotter in ''Fanfic/TheDarknessSeries''.
* In ''Fanfic/EquestriaAHistoryRevealed'', [[WellIntentionedExtremist General Thunderhide]] qualifies for this, as a well-loved war hero who joins Nightmare Moon's Civil War after [[NecessarilyEvil believing no true change can come while Celestia remains in power]]. He knows what he's doing is wrong, but sees it as the only option available to him.
* The ''Fanfic/PonyPOVSeries'' has a number of them. The first we see is in "Epilogue", a BadFuture [[TheBadGuyWins where Discord won]]. The Mane Six have been turned into his immortal CoDragons and now do his bidding, at ''best'' having no idea they were once heroes like Twilight Tragedy and Rarigreed and at worst knowing they were but [[BeingEvilSucks having no way to escape their fate]]. Though Liarjack still remains somewhat heroic, as she does her best to save lives, but she still has done horrible things like [[spoiler:helping kill [[HeroAntagonist Queen Cadance]]]]. Thankfully, the Dark World Series finally sees them [[HeelFaceTurn rise again.]]
** Then there's the second BigBad, [[spoiler:Nightmare Whisper, [[BewareTheNiceOnes Fluttershy's]] SuperpoweredEvilSide born when she couldn't bare the cruelty in the world and tried to fix it, turning into a WellIntentionedExtremist and trying to conquer the world and ''force'' it to be nice. In the end, she's purified with the Elements and becomes TheAtoner.]]
** [[spoiler:Nightmare Mirror, Applejack's AlternateSelf who became a Nightmare after her Applebloom didn't escape the events of VideoGame/StoryOfTheBlanks, turning into a truth obsessed MultiversalConqueror intending to rid the multiverse of deceit. Thankfully, Applejack manages to team up with five other alternate versions of her (including Liarjack, now back to Applejack) to purify her with the Elements of Harmony, then Applejack and Orangejack convince her to turn good again. The same journey also shows Nightmares of Rainbow Dash and Pinkie Pie called Nightmare Manacle and Nightmare Granfalloon respectively.]]
** One alternate universe shows the Harmony Queens, a version of the mane six who went Knight Templar, overthrew and [[SealedGoodInACan imprisoned Celestia and Luna]], and took over the world eradicating anything they viewed as Disharmonic and brainwashing ponies in mass with the Elements. According to WordOfGod, they're based off the Justice Lords from the ''WesternAnimation/JusticeLeague''.
** Finally there's [[spoiler:Nightmare Eclipse/Paradox, the true BigBad of the Dark World Series. She's a potential [[FutureMeScaresMe future version of Twilight]] who went Nightmare to take revenge on Discord for what he did. She then become [[HeWhoFightsMonsters She Who Fights Monsters]] and trapped Discord in a GroundhogDayLoop, erasing ''billions'' from existence each loop to feed her grudge and not even caring anymore so long as he suffers.]]
* Of course, there's ''FanFic/{{Cupcakes}}'', a notoriously DarkFic that features Pinkie Pie, the same pony representing the Element of Laughter who helped to defeat Nightmare Moon and Discord, now a homicidal maniac with cannibalistic intentions.
* Gentaro in ''FanFic/HorseshoesAndHandGrenades'', having been placed into a MoreThanMindControl situation from Ophiuchus. [[spoiler: Ryusei also becomes this, due to Tachibana brainwashing him and converting him into a cyborg in an 'attempt' to fix all the mistakes he did.]]
* ''Fanfic/FalloutEquestria'':
** Two-thirds of the [[WesternAnimation/MyLittlePonyFriendshipIsMagic Mane Six]] descends into villainy in the backstory, set during the war between Equestria and the zebra nation. Twilight Sparkle becomes an amoral MadScientist and EvilutionaryBiologist obsessed with finding a way to turn normal ponies into alicorns, Rarity experiments with dark magic and creates propaganda that encourages hatred against zebras[[note]]She eventually has a MyGodWhatHaveIDone moment and literally sacrifices her soul in an attempt to redeem her friends, but by then it's far too late.[[/note]], Pinkie Pie becomes a drug-addled psychopathic torturer who runs the Equestrian equivalent of the [[Literature/NineteenEightyFour Ministry of Love]], Rainbow Dash becomes a BloodKnight GeneralRipper obsessed with her own martial prowess and kill count, and Fluttershy [[spoiler: passes military secrets to the zebras out of a misguided sense of kindness, directly leading to Equestria's destruction.]] Only Applejack retains her moral compass, and it gets her [[spoiler: horribly disfigured in an assassination attempt.]]
** Also [[spoiler: Red Eye]]. Everything we see of his backstory points to him being an expy of the Lone Wanderer, but by the time he appears in the story, he's fully into WellIntentionedExtremist territory and willing to do [[AGodAmI absolutely anything]] to save the wastes.
* In ''Fanfic/TheShadowWars'' Story Verse, this is true of Grey Hoof (originally from VideoGame/StoryOfTheBlanks). He was a heroic leader and loving father, whose StartOfDarkness came when plagues ravaged Sunney Towne and he could do nothing to protect his Ponies from them. He became increasingly frantic in his desire to prevent these plagues from returning. Eventually he [[OffingTheOffspring kills his most beloved daughter Ruby Gift]] in the delusion that she had the Mark Pox and would die horribly anyway -- setting in motion the events leading to the Curse.
* The Fierce Deity is stated to be this in ''[[Fanfic/BoundDestiniesTrilogy Blood and Spirit]]''. It is revealed that he was once the chosen hero of Termina's guardian goddess, Terminus, just as Link is to Zelda/Hylia. He fought Majora and won, only to end up being corrupted into what he is now. Terminus has Din, Nayru, and Farore send Link and Zelda to Termina to help and after Link has weakened the Fierce Deity, she and Zelda use the Song of Healing in an attempt to restore him to his former self; unfortunately, by that point, he has been far too corrupted by Majora to be saved, and is instead converted into the Fierce Deity's Mask. Though heartbroken over the loss, Terminus is nonetheless comforted by the knowledge that at least her hero is finally free from Majora's control.
%%* Rainbow Dash in [[Fanfic/RocketToInsanity Rocket to Insanity]].
%%* ''Fanfic/MegaManDefenderOfTheHumanRace'' has Mr. Black, who was once a top FBI agent.
* ''Fanfic/MirrorsImage'': Amazingly, [[spoiler:Chrysalis is one. She used to be Princess Celestia's student, and a bearer of the Element of Magic. Then she found out she was a Changeling, and was banished. A thousand years of anger and resentment later, and there's little to nothing left of the pony she used to be. And she's not very broken up about it.]]
* ''Fanfic/WarAndPeaceInMind'' has the Red Knight a.k.a. Baron Battle before the story even starts. Once a great hero, his exploits made him eventually grew so frustrated with the incompetency of society that [[FaceHeelTurn he decided that the only way to fix the problem would be to rule the world]].
* One of the CanonWelding elements of ''FanFic/DigimonTrinity'' has [[CheerfulChild Takeru "TK" Takaishi]] from ''Anime/DigimonAdventure''/''[[Anime/DigimonAdventure02 02]]'' grow up to take over the role of [[WellIntentionedExtremist Mitsuo Yamaki]] from ''Anime/DigimonTamers''.
* Harry Potter in ''Fanfic/HarrysMadness'' who razes Hogwarts to the ground, and turns the DA into an army for world domination, all because he didn't get enough support in fifth year.
* In ''[[Fanfic/GuardiansWizardsAndKungFuFighters Guardians, Wizards, and Kung-Fu Fighters]]'', it's eventually revealed that [[HumanoidAbomination the Tracker]] was originally Didier, one of the great heroes of Meridian's ancient past. How exactly this came to pass is currently unknown, however.

[[folder:Films -- Live-Action]]
* Harvey Dent in ''Film/TheDarkKnight'' definitely counts, after he becomes Two-Face. Formerly idealistic, he grows steadily more cynical in the face of [[spoiler:the Joker's crimes and, after the Joker's BreakingSpeech, turns into a StrawNihilist who believes that Chance is the only fair law.]]
%%* [[spoiler:Kirsty Cotton]] in ''Film/HellraiserHellseeker''.
* ''Film/TransformersDarkOfTheMoon'': [[spoiler: Sentinel Prime, by virtue of FaceHeelTurn. He made a deal with the Decepticons that would restore their home planet of Cybertron]]. Additional material establishes Megatron as this. Before the Great War, he was the Lord High ''Protector'' of Cybertron, ruling equally with Optimus. It's implied he was corrupted by [[spoiler:the Fallen]] in a moment of weakness.
* ''Franchise/StarWars'':
** Anakin Skywalker, who got three whole movies of StartOfDarkness.
** Skywalker may have been the most infamous Jedi to turn evil, but he was hardly the only one. Count Dooku, the villain in ''Film/AttackOfTheClones'', was once a member of the order too, and ExpandedUniverse books often feature "Dark Jedi" as villains, many of whom were formerly real Jedi, who are too numerous to list.
** Anakin's own grandson Jacen Solo would follow his path in the ExpandedUniverse, becoming the villainous Darth Caedus.
** His son, Luke, ended up taking the HeroicNeutral path in Film/TheLastJedi, hiding away, waiting to die. [[spoiler: He ends up mentoring Rey in the ways of the force, and even does a HeroicSacrifice against Kylo Ren at the end of the movie.]]
* Madmartigan, the master swordsman in ''Film/{{Willow}}'', qualifies for the "lost himself in dissipation" version of the trope.
%%* Creator/RobertDowneyJr's character in ''Film/{{Zodiac}}''
* According to supplementary materials, Pitch Black from ''WesternAnimation/RiseOfTheGuardians'' was this. He represents fear, and [[DarkIsNotEvil originally protected children]], since there are many situations where FearIsTheAppropriateResponse. Unfortunately, he eventually went completely overboard with this, and by the time the movie takes place he's a CardCarryingVillain.
* The protagonist [[TheIdealist Kaji]] in ''Film/TheHumanCondition'', who cannot [[BeingGoodSucks survive and retain his humanist principles.]]
* Battra from the Franchise/{{Godzilla}} Heisei series counts. He originally started out as the Earth's protector until he went too far which led to the destruction of an ancient civilization and his imprisonment by Mothra.
* ''Film/XMenFirstClass'':
** Erik Lehnsherr gets a more heroic treatment than usual, making him more of this trope than of the typical AntiVillain fare.
** Same for Mystique (which is actually the reverse of the comics continuity in which Mystique begins as a murdering villain but later on becomes a hero and a member of the X-Men).
* Michael Corleone of the ''Film/TheGodfather'' films. He chooses to fight in World War II instead of following in his crime family's footsteps, much to the shock of his brothers. He returns home as a respected war hero, and plans to start a family with his fiance. Then his father is nearly killed by an ambitious drug runner, forcing Michael to act. He eventually gains control of the crime family and possibly becomes even more ruthless than his own father by the end of ''Film/TheGodfatherPartII''.
* Officer Matt Cordell in ''Film/ManiacCop'' was a hero in his heyday, but after he got too close to certain inviduals, he was sentenced on a phony charge to spend time on Sing Sing prison. The stay was an equal to torture to him, and he ended up as a brain-damaged wreck who punishes the society for turning against him.
* [[BigBad Immortan Joe]] in ''Film/MadMaxFuryRoad'' was once a war hero of the oil and water wars, as indicated by the vast number of service medals that he wears throughout the film. Afterwards, he became a brutal dictator who [[BrainwashedAndCrazy brainwashes young men]] into being suicide bombers and holds women as {{Breeding Slave}}s.
* ''Film/BatmanVSupermanDawnOfJustice'':
** Franchise/{{Batman}} has already abandoned his ThouShaltNotKill stance after 20 years fighting crime in [[WretchedHive Gotham]], (while he's still not a full-on [[ComicBook/ThePunisher Punisher]]-style VigilanteMan, he [[BatmanGrabsAGun now equips his vehicles with firearms]], and is more than prepared to use lethal force if he has to) to the point that even ordinary citizens noting that there's a "new kind of mean in him". As the movie progresses, he falls to the point where he tries to flat out ''murder'' Franchise/{{Superman}}, his cynicism, anger and feeling of helplessness in the face of things as powerful as Superman and Zod having driven him to believe that Superman is a potential threat to the human race and must be wiped out. [[spoiler:Luckily, Bruce [[MyGodWhatHaveIDone realizes just how far he's fallen]] before he can kill Clark, and [[HeelFaceTurn begins to redeem himself]]]].
** In Bruce's "Knightmare" vision, he sees a potential BadFuture where Superman has become a Fallen Hero, ruling Earth with an army of soldiers and the help of nightmarish flying monsters [[note]]actually [[Comicbook/NewGods Darkseid's]] Paradeamons, but Bruce doesn't know this yet[[/note]].

* ''Franchise/TolkiensLegendarium'':
** ''Literature/TheSilmarillion'': Fëanor. He was the mightiest, most skilled, most puissant of all the Elven race... and the source of their greatest woes. Also a major case of YouCouldHaveUsedYourPowersForGood.
** Morgoth is a fallen Valar and this universe's equivalent of {{Satan}}, which as noted above is one of the oldest examples there is, so he counts. Sauron too, he used to be a Maia which were like angels.
** Then there is Saruman the White, greatest of the Istari (Wizards), in ''Literature/TheLordOfTheRings''.
* Ineluki, the Storm King of Creator/TadWilliams' ''Literature/MemorySorrowAndThorn'', started out as a hero of the Sitha, but he took his people's racist tendencies to the extreme and, when Asu'a was sacked, he turned from defending his people to killing everyone else. Also an example of MotiveDecay.
* In the ''Literature/TheBelgariad'', Zedar, TheDragon, used to be Belzedar, one of Belgarath's sworn brothers and a servant of the god Aldur. When Torak, the BigBad of the series, struck Aldur and stole the Orb, Zedar headed out to confront him...and found himself overwhelmed by Torak's power. Faced with TheDarkSide, he gave in to his barely-suppressed lust for power and swore fealty to Torak.
* Gerald Tarrant[[spoiler:/The Hunter]] in the ''Coldfire'' trilogy. Sorcerer, philosopher, and Prophet of the One God, until the religion he had created excommunicated him, at which point, he killed his wife and children as a part of a [[DealWithTheDevil bargain with Dark Powers]].
* In the ''Literature/DilvishTheDamned'' stories by Creator/RogerZelazny, it's stated that the BigBad Jelerak used to be good many hundreds of years ago. But he crossed the MoralEventHorizon long ago.
* Marth in the ''Literature/HeirsOfAsh'' books, complete with also being Tristam's ForWantOfANail EvilCounterpart.
* ''Literature/TheDresdenFiles''
** [[spoiler:Agent Denton]], who is also HeWhoFightsMonsters. When Harry soulgazes him, he sees that he used to be a genuinely good man, but his methods (most notably, his use of [[spoiler:the Hexenwulf belts]]) made him just as bad, if not worse, than the people he's trying to take down.
** The Corpsetaker was once a member of the White Council.
* Crudgeon in Literature/ArtemisFowl was [=LEPrecon=]'s golden boy and best friend of the DaChief. In book 1 AmbitionIsEvil put him in a TraumaCongaLine and he became one half of the BigBad of book 2.
* ''Literature/TheKingkillerChronicle'' has Lanre, who was once a great hero but went mad with grief when he was unable to use his power to resurrect his beloved.
* [[spoiler: Hollyleaf]] from ''Literature/WarriorCats'' eventually becomes this, when [[spoiler: her love of the warrior code makes her turn murderous.]] But then [[spoiler: she has a HeelRealization.]]
* Satan in ''Literature/ParadiseLost'' was once a glorious angel, but he falls from grace and becomes evil. In the story, he's ironically given the trappings of an epic hero, [[WrongGenreSavvy which he clearly believes he is]].
* [[spoiler:Kalthused]] of ''Literature/WithinRuin''. He starts out as a heroic leader fighting for the independence of his country but when [[spoiler: his wife Ankaa dies]] he falls into a spiral of despair. He forsakes all his old morals and plunges the country into futile wars for centuries in order to [[spoiler: [[AlwaysSaveTheGirl bring Ankaa back to life]]. ]]
* By the end of ''Literature/{{Animorphs}}'' [[spoiler:Jake]] has become one of these. It's stated in the epilogue that the only reason he's not being tried as a war criminal is because he fought for the side the won the war.
* Literature/TrappedOnDraconica: Pre-series [[spoiler: Kazebar]] was Draconica's number 1 humanitarian. To reward his good work [[spoiler: Dronor granted his son the power to travel between worlds, believing that if any human deserved this honor it would be Kazebar's family line.]] Whether he was tempted by this power or if he was EvilAllAlong is not made clear.
* David Gemmell loves subverting this trope. Waylander is a war hero. Then his family is slaughtered, and he makes sure none of the assailant "takes less than an hour to die", and finances his vengeance by becoming a professional killer. Then he seeks redemption, gets it somehow, his family gets killed again, vengeance ensues, redemption again, and then he dies a stupid death by the hand of the son of the man whose death was the reason for his first face heel turn toward good. Gemmell does not like black and white.
* Luke Castellan from ''Literature/PercyJacksonAndTheOlympians''.
* Brittney Donegal from the GONE series.
* Donald from Sukhinov's ''Emerald City'' series.
* ''Literature/TheGirlWhoCircumnavigatedFairylandInAShipOfHerOwnMaking'': [[spoiler:The Good Queen Mallow]] became the Marquess due to her anger at being returned to the mundane world. She still considers herself the hero.
* Many of [[QuirkyMinibossSquad the Forsaken]] from ''Literature/TheWheelOfTime'' were this. Demandred, Sammael, and Be'lal were all great generals on the side of Light (and all three of them turned to the Shadow out of rivalry with the Light's ''other'' great general, [[TheChosenOne Lews Therin Telamon]]); Graendal was a famed ascetic who went bad after deciding that no one could possibly measure up to her extreme moral standards; Ishamael was considered the greatest philosopher and theologian of his age, but learned one too many ThingsManWasNotMeantToKnow and [[GoMadFromTheRevelation went mad from the revelation]], becoming in essence TheAntichrist. Subverted with Semirhage, who though a renowned healer was always a sociopath and sadist deep down and turned to the Shadow early on upon realizing that the Dark One would let her use her talents in [[ColdBloodedTorture ways]] that society would never accept.

[[folder:Live-Action TV]]
* [[spoiler:Buredoran/Brajira]] from Series/TensouSentaiGoseiger. [[spoiler: It's revealed that he used to be a Gosei angel who turned on the rest of his team and stole there powers killing them. He uses an experimental power to travel 10,000 years into the future to enact his grand plan to remake the world and become it's messiah and savior.]]
* Jon Mitchell from ''Series/{{Being Human|UK}}''. He tries hard to fight his vampire urges and tries to be an example of reform, but [[spoiler: he falls off the wagon in season 2 and slaughters a train of 20 people. He never really gets back to normal after that and commits suicide.]]
* Willow Rosenberg of ''Series/BuffyTheVampireSlayer'' became the CardCarryingVillain version of this trope after witnessing [[spoiler:the death of her girlfriend]]. Magic high also leads to her becoming this. Luckily, the transition was temporary in the TV series. There was also an Alternate Universe book trilogy (''"Wicked Willow"'') that explored what would have happened if she had stayed that way.
** The canonical ''Season 8'' comic books state she is still this; specifically the "Time of Your Life" arc, which [[CrossOver crosses over]] with ''ComicBook/{{Fray}}'', a BadFuture where Willow becomes an EvilSorceror and the BigBad (though she tries to prevent it by avoiding DarkMagic).
** In the ''Season Nine'' comics we learn that while she is holding it together around Buffy, Willow is hell bent on bringing magic back, believing the world is going to end and she has to save it. Faith also took the CardCarryingVillain route after accidentally killing a human, also temporary-ish (though its acknowledged in-universe that her actions while she was a villain went too far to just be forgiven and forgotten).
* ''Series/{{Angel}}'' plays it straight with Daniel Holtz, season three's BigBad. He was once a force for good, but Angelus and Darla destroyed his life, slaughtered his family, and reduced him to a [[RevengeBeforeReason revenge-driven]] monster. At his best, he is a NobleDemon, at his worst he's a petty old man willing to sacrifice the lives, happiness, and even sanity of people who love him in order to have his revenge.
* Numerous times on ''Franchise/LawAndOrder'' and its various spin-offs as a revered sports star or actor will be revealed as a killer, pedophile, rapist or worse.
** When she and a rookie cop bust a boxing champ as a pedophile, Rollins tells the rookie "Stay on this job long enough, you watch all your heroes die."
* ''Series/{{Heroes}}''
** Linderman. His low-key, evil approach is made all the more monstrous when viewers realize that, having the ability to heal most injuries, he chooses to have people killed, kidnapped, and crippled instead.
** Adam Monroe. He is introduced as Takezo Kensei, the ''literal'' hero of legend. Despite trouncing all the fantastic tales attributed to him in one fell swoop, Kensei proves himself a true hero many times over during his time with Hiro -- only to do a FaceHeelTurn when Hiro steals away the woman he loves right out from under his nose. Four hundred years later, his heartbreak has driven him to seek a 'second chance' by [[WoobieDestroyerOfWorlds wiping out 93% the world's population.]]
* In the French fantasy dramedy ''Kameloth'', the Knight Lancelot start out as the noble and charismatic hero we expect him to be, but he has always been ideologically opposed to the libertarian policy of Arthur (who he considers a proof of weakness) and considers himself more worthy of the holy mission given to his king. After the spoofed-legend-opposed-got-away-with-Guinevere-part, he [[spoiler:openly rebels against Kameloth's order and became the tool of a dark sorcerer named Melangeant, who presents himself as {{The Chessmaster}}ing ''answer of the gods'' to Arthur's failure in his mission]]
* ''Series/KamenRiderDouble'': Katsumi Daido and NEVER as whole. They were originally at least [[AntiHero AntiHeroes]], but the events of [[spoiler: Kamen Rider Double Returns: Eternal caused their fall into madness and villainy.]]
* ''Series/KamenRiderExAid'': [[DoctorJerk Taiga Hanaya]]/Kamen Rider Snipe used to be a [[NiceGuy gentle soul]] working for Seito University Hospital before being chosen as the first user of Gamer driver. Everything went downhill from there, making Taiga the self-centered jerk other Doctor riders would come to know. He is aware of how far he had fallen and it pains him, but is still determined to continue on his way. Well, [[CharacterDevelopment with]] minor [[JerkWithAHeartOfGold adjustments]].
* Eli David in ''Series/{{NCIS}}'' seems to be this. In a way, he's reminiscent of [[Literature/LordOfTheRings Denethor]].
* Some of the best episodes of ''Series/{{Scrubs}}'' deal with this happening to Dr. Cox. While the fall is temporary, the sight of the normally caustic and extremely confident physician in tears is very heartrending, to say the least.
* ComicBook/LexLuthor from ''Series/{{Smallville}}'' is a great example. He started off as nothing more than a good Samaritan friend to Clark Kent. As time went on, he became nastier and more cynical at the world, and possibly became Clark's worst enemy. However, how long would the show actually last if Luthor was kept a good guy throughout the entire show?
* In ''Series/ChinesePaladin'', [[WarriorMonk Jiang Ming]] was TheParagon of Mt. Shu, on track to become the BigGood before it's revealed he's having an affair. He snaps when ordered to kill his lover, [[OmnicidalManiac massacres the entire population of the mountain]], and becomes a vengeful ghost who, a hundred years later, is so powerful none of the monks dare enter the Demon Pagoda.
%%* Stefan Salvatore on ''Series/TheVampireDiaries'', especially in season three, is an example of this.
* [[spoiler: Jack Bauer]] in ''Series/TwentyFour''. First seven seasons? Someone who pushed himself ten times beyond the brink both physically and mentally to repeatedly ensure the safety of the country and world. Final season? After his latest mission winds up going horribly wrong and ends on a tragic note, he winds up embarking on a personal crusade of [[RoaringRampageOfRevenge revenge]] that ultimately causes an international crisis and nearly instigates a war that would lead to the deaths of millions of innocent people, just barely stopped himself after [[HeelRealization realizing]] how bad those repercussions would be. Rivaling him would be [[spoiler: Tony Almeida]] who went from protecting people to threatening them all to avenge the murder of his wife... [[spoiler: and unlike Jack he never had a HeelRealization.]]
* ''Series/DoctorWho'' has had '''the Doctor''' come to or near this point twice, but also reconstructed the trope in both cases.
** When the Eighth Doctor, barely saved from death, is convinced to fight in the Last Great Time War rather than just try and help those caught up in it, he decides to give up his principles and title to do so and regenerates into what comes to be known as the War Doctor. He does the opposite of a healer's work as a warrior, and finally decides to destroy both the Dalek forces massing around Gallifrey '''and''' Gallifrey and his people (including billions of innocent children) to end the war. His later lives deliberately try to forget this incarnation for committing such a wicked act. However, in the 50th anniversary special "The Day of the Doctor", Ten and Eleven come to an understanding of his side of the story and how [[IDidWhatIHadToDo he did what he had to do]]... and then in the climax, [[spoiler:at companion Clara's behest, they and all of the other incarnations of the Doctor figure out a way to SAVE Gallifrey yet end the Time War at the same time]], thus reconstructing the trope spectacularly!
** The Twelfth Doctor undergoes a TraumaCongaLine in the climactic stretch of Series 9. In "Face the Raven", he is lured into a trap and betrayed by [[spoiler:Ashildr/Me]], but even worse, because his beloved companion Clara takes a daring risk to save someone, [[spoiler:she accidentally condemns herself to death]]. In "Heaven Sent" he is trapped by, as it turns out, [[spoiler:the Time Lords (his people!)]] in a giant torture chamber. By the time he escapes it, he has been DrivenToMadness by rage, anguish, grief, and torture, and become TheUnfettered. In the finale "Hell Bent" he uses his legendary cleverness to [[spoiler:pull Clara out of time at the moment of her death]], an act that threatens to '''destroy the entire universe''', all because he can't take the pain anymore. In the end, [[spoiler:Clara herself]] triggers a HeelRealization and he realizes he must give up his TragicDream and "be a Doctor" once again.
** As for Rassilon, the founder of the Time Lords, he was always revered despite being a bit of a genocidal maniac, but the War pushed him off the crumbling remains of his pedestal.
* In ''Series/The100'' Season 1, Finn was probably the most moral and idealistic of the teen characters; he was the one actually trying to make peace with the Grounders rather than assuming violence was inevitable. By Season 2, though, the traumatic experiences he's been through and a belief that his LoveInterest is in danger drive him to increasingly violent ends to get her back, ultimately [[spoiler:slaughtering a Grounder village, killing 18 innocent, unarmed people; he's executed for his crimes shortly afterwards]].
* [[DirtyCop Sheriff Rosco P. Coltrane]] from ''Series/TheDukesOfHazzard'' used to be a man of justice. Until his pension was vetoed, leaving him to either retire without a penny to his name, or [[FaceHeelTurn join in Boss Hogg's scheming.]]
* ''Series/HerculesTheLegendaryJourneys'' features Gilgamesh in Season 5's "Faith" and reveals him to be this during the climax. Like Hercules, he couldn't depend on the gods to protect his family and lost them in a senseless act of violence. However, whereas Hercules treated his tragedy as a motivation to never stop fighting for others, Gilgamesh became TheDragon to the BigBad.
-->'''Gilgamesh:''' When I lost my family, I did lose my faith. And in my deepest despair, I heard the voice of [[GodOfEvil Dahak]]--a voice so pure, so true, I knew I had found salvation.
* ''Franchise/UltraSeries'': Ultraman Belial qualifies this trope, for being [[spoiler:corroded by the power of the Plasma Spark]], which would subsequently cause his exile, in Planet Golgotha, he becomes even more corrupted after merging with [[spoiler:the blood of a murderous alien race, the Reiblood]] by this point, Belial can't go any deeper down the rabbit hole, right? well you'd be WRONG! because [[spoiler: by the second movie, Belial decides to absorb the energy of a powerful crystal, transforming himself into Arc Belial]], by this point he barely even resembles an Ultraman anymore, and [[LaserGuidedKarma he has turned into what he swore to destroy:]] [[EldritchAbomination a Kaiju himself]]
* In ''Series/{{Westworld}}'', [[spoiler:William]] first arrived at the park as a milquetoast and moral guest looking for meaning in his life. He seems to find meaning in Dolores, [[RidiculouslyHumanRobots a Host]] who he falls in love with. Unfortunately, over the course of the first season, [[spoiler:William]] is pushed toward brutality by his business partner [[spoiler:and brother-in-law Logan]], destroying his moral code piece by piece. [[spoiler:William]] snapped after a BreakingSpeech from [[spoiler:Logan]], and he began to mercilessly slaughter Hosts who stood in his way. His turn to evil is cemented [[spoiler:once he finds out that Dolores had her memory wiped]]. [[spoiler:30 years later, William becomes the Man in Black, a violent, raping sociopath who's obsessed with finding the true meaning of the park.]]

* The titular ''Iron Man'' (no, not [[IronMan that]] one) from Music/BlackSabbath's song. Though they made him a villain in order to avoid lawsuit, [[HilariousInHindsight ironically enough]], the song was used in the 2008 Film/IronMan movie.
* [[Music/TheProtomen Proto Man]]. Possibly VideoGame/MegaMan too.
* The German electronic music project Funker Vogt's single "Fallen Hero".

[[folder:Myths & Religion]]
* ''Literature/TheBible'':
** ''Revelations'' shows {{Satan}} as a fallen angel. This is OlderThanFeudalism, as the popular depiction has roots in the 2000+ year old source material.
** King Saul; initially portrayed as a humble, God-fearing man, he makes some bad choices, undergoes (demonic-induced) madness, and ends his reign as the arch-enemy of the man God chose to succeed him.
** King David: farmer, harp player, and faithful to God until he becomes king. Then he spies on a naked woman and puts her husband in the front lines of battle, ''twice'', just so he'll die, and David will be free to marry his widow.
*** Surprisingly and hilariously, ''WesternAnimation/VeggieTales'' parodied this story.
** King Solomon: the man who built the Temple fell to idolatry as the price of maintaining political alliances with foreign kingdoms. His rule would [[NiceJobBreakingItHero eventually split Israel in two]].
** King Jeroboam; God's new ChosenOne who should have corrected Solomon's mistakes again fell to idolatry when he built idols to prevent pilgrims from going to Jerusalem (now enemy territory).
** King Jehu: Again God's ChosenOne to displace the Omrid Dynasty. But but he went overboard in his massacre of those affiliated with Ahab. Then he ended and persecuted Baal worship only to continue in Jeroboam's false worship.
** King Joash: the LoneSurvivor of ThePurge that almost wiped out David's dynasty became arrogant and corrupt. He had the son of his mentor killed for speaking out against him.
* ''Myth/GreekMythology'':
** Bellerophon. The first great Hero of the Heoric Age even before Herakles and Perseus, he killed the Chimera. But then he thought he was worthy of godhood and attempted to invade Olympus with Pegasus.
* ''Myth/NorseMythology'':
** [[TricksterArchetype Loki]] [[DeadpanSnarker Laufeyson]] (you know, the bad guy in ''Film/{{Thor}}'' and ''Film/{{The Avengers|2012}}''), the blood brother of Odin and best friend and GuileHero sidekick of Thor, started off as a light hearted comic relief of sorts, with something of a running gag in the stories of him being threatened with death by the other Gods (sometimes in retaliation for a prank, sometimes because they're just jerks like that), then his attempts to fix everything resulting in him suffering some form of mutilation or humiliation (from having his mouth stitched closed to being raped and impregnated by a giant horse), but he remained loyal to Asgard, but eventually, his humiliations and repeated sufferings, combined with the fact that the Gods didn't particularly care for him that much, made him bitter and resentful, until coming to a head when they imprisoned him on a boulder (chained up by [[KickTheDog his own son's]] [[{{Squick}} entrails]]) with a giant serpent dripping venom into his eyes. Once free of this FateWorseThanDeath, Loki lead the enemies of Asgard against the Aesir, dying in battle against Heimdall, but in doing so, brought about the EndOfTheWorldAsWeKnowIt, Ragnarok.
** What makes this even more tragic is that this aspect is often left out in adaptations, where Loki ends up becoming the Norse equivalent of a standard bad guy. Since Loki's FaceHeelTurn happened right before he died, many later versions of the Norse tales have him instead being a real asshole who constantly screws over the others. In fact, the original reason Loki was chained to the boulder was retconned, so instead of being because he insulted them all at a party they didn't invite him to (he wasn't invited so they could talk about him behind his back) was instead because he arranged the death of Baldur (something he merely claimed to do in order to wind them all up), with no party or comments involved.

[[folder:Pro Wrestling]]
* Wrestling/HulkHogan, in Wrestling/{{WCW}}, eventually realized he was "old news", and the fans he'd lived his life to please didn't care about him anymore. So he called up his buddies from [[Wrestling/{{WWE}} up north]] and [[FaceHeelTurn turned heel]] at ''Bash at the Beach'', so they could [[Wrestling/NewWorldOrder destroy everything WCW fans enjoyed about the company]].
* Similarly, Wrestling/ChrisJericho's recent Wrestling/{{WWE}} FaceHeelTurn was fueled by the fans' continued cheering for Wrestling/ShawnMichaels -- who was not only a lying, cheating hypocrite, but was unrepentant for having retired the great Wrestling/RicFlair. In Jericho's mind, it's not him that turned; it's the fans.
* Speaking of HBK, he's been this several times (all versions at different points), including presently.
** Specifically, he was the outright villainous version during his initial turn after turning on Jannetty, the anti-hero version for parts of the initial [[Wrestling/DGenerationX DX]] run, the anti-villain in his crusade against Hulk Hogan, and the retired/disinterested version during his various retirements and sabbaticals.
* Subverted with Wrestling/BretHart in 1997, who only turned against the American wrestling fans, but was still considered a hero in the other territories.
* Wrestling/StoneColdSteveAustin's character was defined by his drive to become the WWF Champion "at all costs". Usually, this just meant that Austin would theoretically work harder than everyone else to get it. His Face Heel Turn came out of taking that to the logical extreme, where he allied with his perpetual nemesis, Wrestling/VinceMcMahon (and his rival, Wrestling/TripleH, the next night...who tried to ''kill'' him in the past), at the now-famous ''Wrestlemania X-7'', to guarantee he would leave the event as WWF Champion.
* When Wrestling/TheRock fought heel Hollywood Hogan at ''Wrestlemania X8'', he unexpectedly got a lot of boos and "Rocky sucks!" chants (he was also booed at the last Wrestlemania, but that was against Stone Cold in Texas, so it's understandable). Given how popular The Rock is supposed to be, it came as a shock that people would boo him over the heel, Hogan. The Rock later used this as partial reasoning for turning heel the next year where he defeated both Hogan AND Austin in back-to-back PPV's.
* Wrestling/MickFoley was probably the most famous "hardcore" wrestler during his stint as Cactus Jack, due to his runs on Wrestling/{{WCW}} and his Death Matches in IWA Japan with Wrestling/TerryFunk. However, when he made his FaceHeelTurn in Wrestling/{{ECW}}, he cited the fans' expectations of the wrestlers (and their desire to see wrestlers put themsleves in increasingly dangerous situations) as the reason he turned on Wrestling/TommyDreamer, the heart and soul of ECW. He then began his "anti-hardcore" gimmick where he became a WCW-shilling, non-hardcore butt boy for Wrestling/EricBischoff, everything ECW fans ''hated'' in wrestling.
* Wrestling/ChrisBenoit was at one time considered arguably one of the greatest wrestlers of all time but his claim as one of the greats has all but been erased due to the events of [[PaterFamilicide the last days of his life]].

[[folder:Tabletop Games]]
* The Blackguard class from ''TabletopGame/DungeonsAndDragons'' is specifically designed for fallen heroes, allowing the player to "trade in" Paladin levels for Blackguard levels after completing a FaceHeelTurn. However, while the character may not have been planning on the transition, the player almost always is; the Blackguard class has pre-requisites that don't make sense for most Paladin builds. The idea is that a character won't go straight from Paladin to Blackguard, but will instead "fall" as a Paladin (losing all their Paladin-specific abilities but retaining their raw stats) and then choose to [[FaceHeelTurn pursue the path of the Blackguard]] instead of redemption, summoning an evil outsider to [[DealWithTheDevil teach them how to do so]]. The most awkward pre-requisite for a fallen Paladin is still the five ranks in Hide, however.
* ''TabletopGame/YuGiOh'':
** The [[http://yugioh.wikia.com/wiki/Gigobyte Gigobyte]] / [[http://yugioh.wikia.com/wiki/Gagagigo Gagagigo]] / [[http://yugioh.wikia.com/wiki/Giga_Gagagigo Giga Gagagigo]] / [[http://yugioh.wikia.com/wiki/Gogiga_Gagagigo Gogiga Gagagigo]] cards, which describe a young troublemaker who has a HeelFaceTurn upon having his [[http://yugioh.wikia.com/wiki/My_Body_as_a_Shield life saved]], and in trying to gain enough power to help repay his debt, he acquires [[http://yugioh.wikia.com/wiki/Level_Conversion_Lab cybernetic upgrades]] which eventually [[CyberneticsEatYourSoul eat his soul]] and drive him mad. It's a surprisingly detailed story told not only in the flavor text of his own cards, but in illustrations for other cards that otherwise have nothing to do with him. It's only natural that his story gets played out in one of the video games. Said video game had him realising the error of his ways. This almost certainly qualifies him for FaceHeelRevolvingDoor. [[http://yugioh.wikia.com/wiki/Gagagigo_the_Risen And now]] HesBack, recovering his heroic soul and getting new armor that lets him keep the power he was searching for.
** [[http://yugioh.wikia.com/wiki/Dragon_Horn_Hunter Dragon Horn Hunter]] succumbed to despair after her village was destroyed and her soul became stained by the hatred of all the dragons she killed, becoming [[http://yugioh.wikia.com/wiki/Dragon_Core_Hexer Dragon Core Hexer]]. She has become a remorseless killing machine and has forgotten her past and original purpose.
* While there are many in ''TabletopGame/MagicTheGathering'', the one that stands out the most is Crovax. When the love of his life (an angel) died, he ended up going over to [[BigBad Yawgmoth's]] side to get her back. [[TheCaptain Gerrard Capashen]] [[NotSoDifferent followed for a similar motive]], but realised that it was a con and ended up [[HeroicSacrifice giving his life to take down Yawgmoth]].
** Glissa Sunseeker fought against [[MadScientist Memnarch]] to save Mirrodin. Awesome, yeah? Too bad that it directly resulted in her [[AndThenJohnWasAZombie becoming a Phyrexian]].
** Nahiri was one of the three planeswalkers who helped [[SealedEvilInACan trap]] [[EldritchAbomination the Eldrazi]] in her own home plane (however reluctant she was at that), and she's generally more friendly than her other two companions, Sorin and Ugin. At one point after she foiled another escape attempt by the Eldrazi, she seeks Sorin to help reinforce the prison, but due to mistiming of the meeting happening when Sorin was busy and tired from another business, he dismissed her, culminating in a fight that got her locked up. After she is freed (not by his hands), she discovers her home plane in ruins due to the Eldrazi escaping, blames him for it (not knowing he's not responsible for that) and decides to bring the Eldrazi into his home plane as a revenge.
* TabletopGame/{{Warhammer 40000}}. Exactly half of the Primarchs turned against their father the Emperor of Mankind in the great betrayal of the 31st millennium. Each of the ten traitors had a personal reason for turning their back on their father. None are more tragic than TheParagon Horus the Warmaster (i.e. the Emperor's second-in-command, since he was the Emperor's favorite son).
** The [[UltimateEvil Chaos Gods]] showed Horus a vision of a terrible future where the Primarchs are gone, the ideals of the Great Crusade are forgotten, and the Emperor is worshiped as a god in a brutal fascist dictatorship. Horus [[DealWithTheDevil dealt with the Chaos Gods]] and turned on the Emperor (the man who saved humanity and rebuilt civilisation after a horrific dark age that lasted ''thousands of years'') to save humanity from this dark fate. The Horus Heresy results in the Imperium becoming increasingly authoritarian due to its paranoia over Chaotic rebellions like Horus's, and the final battle leaves Horus dead and the Emperor in a coma, unable to steer the Imperium onto a more enlightened path. Fast forward ten thousand years, and Horus's actions have caused the Imperium to become a brutal fascist dictatorship where the Emperor is worshipped as a god and the Imperial Truth (the atheistic rationalism which the Emperor personally believed) is thought of as heresy, [[{{Irony}} since it offends the immortal God-Emperor]]. [[DownerEnding Just]]… ''[[DownerEnding damn]]''.
** Then there's Fulgrim, the Primarch who turned his dying homeworld into a thriving paradise and strove to make his Legion the perfect embodiment of Imperial glory and culture. His corruption came from the Laer, xenos exterminated by his Legion that worshipped Slaanesh and heavily modified their bodies for various purposes, from whom Fulgrim obtained a Daemon-possessed sword. Corrupted by the Daemon-sword, the Laer’s practices, and his fallen brother Horus, Fulgrim chemically and genetically altered his legion towards a more and more twisted ideal of “perfection”, while taking up Slaanesh worship, straying from the Emperor’s path. In the end, after killing his brother Ferrus Manus, Fulgrim came to his senses and [[MyGodWhatHaveIDone fell into despair]], which allowed the Daemon-sword to fully possess him, completing the former hero’s fall to Chaos.
** A Fallen Hero or a Misunderstood one? Alpharius and Omegon, the twin Primarchs of the Alpha Legion seemingly sided with Horus against the Emperor. However, they did this after being informed by an universal alien organisation that when the Emperor would defeat Horus, the universe would continue in constant warfare against the [[UltimateEvil Chaos Gods]] , ultimately devouring the universe in the proces. They were told that when Horus would defeat the Emperor, the Empire would fall into chaos for 2 or 3 generations after which the Fallen Primarchs and Horus, ridden with guilt of their actions, would seek war upon themselves and destroy mankind and the [[UltimateEvil Chaos Gods]] in the proces (which is what the Emperor was trying to do). Upon reflecting this information the Alpha Legion decided to side with Horus against the Emperor to actually [[UtopiaJustifiesTheMeans follow the path he had directed]] for destruction of the [[UltimateEvil Chaos Gods]]. Thus they became Fallen Heroes to take the action a Right Hero should do.
** Magnus the Red was a Primarch who strongly supported the use of PsychicPowers and the importance of written knowledge. When he used sorcery to tell the Emperor of Horus's betrayal, despite the Emperor having forbidden sorcery, the Emperor [[ParentalFavoritism refused to believe that Horus could be a traitor]] and thought that it had to be Magnus instead. Therefore he sent the [[BloodKnight Space Wolves]] [[TheRival (who had always distrusted Magnus)]] to Magnus's homeworld Prospero thus forcing Magnus to [[DealWithTheDevil appeal to a Chaos God]] [[TheMenFirst so that his people would survive]].
** In general, the theme of Chaos is that many think they can control it or they will not fall to its addiction. Many are horribly wrong. Freedom fighters pray to them to grant their boon, not knowing that they invite mutation and possession into their bodies. Psykers are tempted with control and normality, but instead are commandeered by daemons. Even entire chapters of Space Marines (most notably the traitor legions and, more recently, the Astral Claws) thought they were doing what was right in defying the Imperium and protecting innocents, only to be branded as heretics and hunted down, ironically forcing them to turn to Chaos to survive. Few are the number who can use the powers of Chaos without losing themselves, and fewer still are the ones who don't eventually succumb to the temptation.
* More than a few villains in ''TabletopGame/WarhammerFantasy'' started off on the path of good.
** Archaon, was originally a devote Templar of Sigmar, however he suffered a TraumaCongaLine after discovering a prophecy revealing he father was a chaos champion, himself a ChildByRape, and fated to become the Everchosen champion of the chaos gods. He begged his god Sigmar for a sign of how to avoid this, but when nothing came he decided lost all hope and went to become a chaos warrior.
** Malekith the King of the Dark Elves was the son of the first Phoenix King Aenarion, and a mighty warrior and leader. When he was refused the crown however he grew bitter and eventually tried to take it by force. He killed the king and the ruling council, but was burned by the sacred flames and he and his followers cast out. Settling in the New World, he started a conflict that would go on for millennia. [[spoiler: Come the End Times its revealed that he actually ''was'' the rightful King all along.]]
* In ''TabletopGame/{{Exalted}}'', this is how new Abyssals are made: a Solar is captured, strapped into a Monstrance of Celestial Portion, and tortured until they die, become catatonic, or become an Abyssal. There's nothing that prevents them from breaking loose, trying to rise again and setting off on a quest for redemption back into a Solar...
* ''TabletopGame/MageTheAscension'' puts this spin on its primary "antagonist" faction, the Technocratic Union. Back in the olden days, they were bona-fide heroes, fighting the old-tyme {{Sorcerous Overlord}}s of the world as the Order of Reason, in the name of God, the common good, and the {{Muggles}} of the world. Nowadays, while they haven't ''quite'' turned into complete villains yet, they've certainly fallen very far from their idealistic past, and quite a lot of Technocrats are more concerned with control and stability than making a positive difference in the world. And the fact that they're much better at making people [[ClapYourHandsIfYouBelieve not believe in magic]] than they are at making them enthusiastic about science is one of many factors slowly killing the world by inches. Unlike many WorldOfDarkness antagonists, Technocratic characters are completely playable, and their sourcebooks often stress the possibility for player characters to be {{Science Hero}}es rather than stodgy, soulless bureaucrats and to act as idealistic {{Internal Reformist}}s working to make the Union a better place.

* Creator/WilliamShakespeare is a fan of these-- both Theatre/{{Macbeth}} and Theatre/{{Othello}} get talked into a FaceHeelTurn, as according to their status as {{Tragic Hero}}es.

%%* In ''Toys/HeroFactory'', [[spoiler:Von Nebula]] is this.
* The [[BrotherhoodOfEvil Brotherhood of Makuta]] from ''Toys/{{Bionicle}}'' were a group of militaristic biologists who created all animals in the Matoran Universe to preserve natural balance, and were later assigned to govern over various regions of the Universe along with the local leaders. Due to their secretive nature and ElementalPowers of shadow, the society began worshiping [[PhysicalGod Mata Nui]] and the Toa heroes over them, even after their armies had just saved the Universe. Thus, they grew envious, and a glitch in their A.I. caused them to turn evil, with Teridax overthrowing the old Makuta leader and becoming the story's BigBad.

[[folder:Video Games]]
* In ''VideoGame/AbobosBigAdventure'', the true BigBad is revealed to be [[spoiler:[[VideoGame/PunchOut Little Mac]]]] who went mad with power after winning the championship.
* In the ''VideoGame/{{Suikoden}}'' series, you'll usually recruit a couple of these per game. The most prominent is probably Geddoe from the [[VideoGame/SuikodenIII third installment]], who, in an interesting twist, in addition to being a Fallen Hero (retired/disinterested variety), is also one of the three main protagonists.
* In the ''Franchise/{{Halo}}'' Universe, Mendicant Bias was created by the Forerunner to be their most advanced AI ever, with its purpose being to help defeat the Flood. However, it ended up defecting to the Flood after being convinced to do so by the Primordial, which also happened to be a Flood [[{{Hivemind}} Gravemind]]. Then the Forerunners build Offensive Bias, who lacked Mendicant's degree of free will, to help defeat Mendicant and the Flood, which they do (though not without also killing off all life left in the galaxy). Afterwards, Offensive and its masters lock Mendicant on the Ark and sentence it to think of only one thing: atonement. 100,000 years later, Mendicant Bias seeks to redeem itself by helping those its masters had deemed "Reclaimers" to their legacy: humans. When Master Chief and Cortana make it to the Ark, it decides to help them in order to show its master that it had atoned for its sins, and it's implied that Mendicant is the one who [[spoiler:sends the two towards Requiem]].
* Creator/{{Square|Enix}}soft's ''VideoGame/LiveALive''
** A major plot-point. A classic KnightInShiningArmor is tricked into [[spoiler:slaying the king, finding out that his best friend has betrayed him, and finally realizing that the princess he's been trying to save is actually in love with said friend.]] He becomes the "Demon King", Odio, who has been a recurring BigBad for the heroes of our world to fight, from the Stone Age to the far future. The {{A|nAesop}}esop, which somehow manages to avoid being {{Anvilicious}}, is that anyone can be a BigBad as long as they hold enough hatred...
** Also, Hash in the medieval chapter, who is a mild case of this. He was a hero who defeated the Demon Lord, but lost faith in humanity and chose to live as a hermit on a mountain. He subverts it by helping Oersted defeat the Demon Lord again.
* In ''VideoGame/{{Overlord}}'', your enemies are seven Fallen Heroes who represent the SevenDeadlySins: Melvin Underbelly the halfing (gluttony), Oberon the elf (sloth), Goldo the dwarf (greed), Sir William the paladin (lust), Jewel the thief (envy), Kahn the warrior (wrath), and the Wizard (pride).
** A more literal example would be [[spoiler:the titular character, who was originally a hero who fought alongside the other heroes, but fell from a great distance and was left for dead by his companions. The EvilPlan of the old Overlord sees the main character eventually revived by his minions and given the position of the Overlord as well as command over the minions.]]
** In the sequel, [[spoiler:Queen Fay]] becomes a Fallen Hero after her HeroicSacrifice. [[spoiler:Florian may also be one, although it's unclear if he was ever truly a hero.]]
--->'''[[spoiler:Rose]]''': Power, it always corrupts.\\
'''Gnarl''': Hah, that's half the fun!
* ''VideoGame/{{Warcraft}}'' is ''very'' fond of this trope.
** Sargeras in ''VideoGame/{{Warcraft}}'' originally fought demons for millennia, but eventually [[HeroicBSOD fell into thinking that it was no use and chaos was actually the only real solution to everything]]. Just to signify what this meant, [[EvilMakeover his bronze skin split apart, revealing a new body of fire and brimstone]].
** Archimonde and Kil'jaeden, the leaders of the eredar who sold their souls to Sargeras and became the leaders of the Burning Legion.
** Similarly, the human prince and paladin Arthas eventually resorted to the cursed blade Frostmourne to slay the demon that was (apparently) behind the plague that turned people into the undead. As a result, it took his soul and turned him into a death knight loyal to the Lich King (who [[MagnificentBastard had all that planned from the start]]).
** Then there's the death knights that followed him, which constitute Orders of Fallen Heroes. A force of them in ''Wrath of the Lich King'' are sent to wreak havoc in Northern Lordaeron... All of which seems to be little more than a [[spoiler:ploy to lure out Tirion Fordring, one the few living beings that could even be considered anything close to a threat to the Lich King. They were just a diversion and, eventually, as a result of a climactic battle in which Tirion reveals the truth of their betrayal and ultimate expendability]], pull a HeelFaceTurn. The player plays through this entire sequence, including all the irredeemable evil goodness inherent therein.
** And the night elf Illidan, trying to fight fire with fire (or demons with demon magic), eventually became a semi-demon himself.
** ''The Frozen Throne'' shows how the arrogant-but-decent high elves turned into the evil, demon-following blood elves they are in ''VideoGame/WorldOfWarcraft''.
*** In a desperate attempt to save his people, Kael'thas turned to demons, and let himself be consumed by their fel magic.
** Neltharion the Earth-Warder, one of the Five Dragon Aspects, charged by the Titans to protect the lands of Azeroth, DugTooDeep. After a little MindRape by the resident {{Eldritch Abomination}}s, he's calling himself [[NamesToRunAwayFromReallyFast Deathwing]].
*** Neltharion took every one of the black breed of dragons with him. They are hunted and mindlessly killed, sometimes just for sport. The truth is that they have all been driven completely insane and/or have lost every last one of their morals. The breed has almost been wiped out or forced under ground. It didn't help that Deathwing is dead, which probably just made things worse for the breed.
*** By that same token, Malygos the Spell-weaver, the Aspect of the Blue dragonflight. Best remembered from the pre-Sundering days for his playfulness and good humor, being the protector of magic. After Deathwing wipes out most of the blue dragons and seriously wounds Malygos, the latter spends 10,000 years in isolation, going mad from loneliness and betrayal. Despite snapping out of his madness in ''Day of the Dragon'' to help fight Deathwing and free Alexstrasza and the rebirth of the Blue dragonflight, Malygos never goes back to his cheery old self. Instead, he declares war against all non-dragon magic users, forcing Alexstrasza to assist heroes in killing a fellow Aspect.
** The Scarlet Crusade, which started out fighting to protect humans from the Scourge in Lordaeron, and gradually became increasingly paranoid to the point that anyone not a Crusader was deemed tainted. [[FromBadToWorse Then their leader was outright corrupted by the undead.]]
* Sarah Kerrigan in ''VideoGame/{{Starcraft}}''. Though she didn't "fall" so much as "was thrown and had her sense of morality suppressed", once she got her free will back, she decided that she liked being evil.
** It was more like her sense of morality and compassion were suppressed, allowing the darkness within to become dominant. Blizzard confirmed that ''Heart of the Swarm'''s arc will be about whether she will fall to darkness forever or transcend it and achieve redemption for her sins. So far, the trailer shapes her to be an AntiHero.
** The Overmind itself, which was long ago taken over by the Dark Voice.
* ''Diablo''
** The first ''VideoGame/{{Diablo}}'' has King Leoric, who was strong enough to resist being completely possessed by Diablo but was left an insane and murderous wreck by the ordeal.
** ''VideoGame/DiabloII'' has ''all three of the original game's heroes'': the Warrior Aidan ([[spoiler: Leoric's eldest son]]) was manipulated into becoming Diablo's new host, the Rogue Moreina became Blood Raven, and the mage Jazreth became The Summoner.
** Pre-release info for the ''VideoGame/DiabloIII'' implied the same would happen to the heroes of the second game (except the Barbarian), but it was ultimately scrapped.
** In ''Reaper of Souls'' the Archangel Malthael led the High Heavens in their war against the Burning Hells but abandoned his station after the theft of the Worldstone. After observing humanity he became convinced that the existence of free will in regards to humanity was an abomination and decided to purge all demons from existence, starting with the demonic essence in human souls.
** ''Reaper of Souls'' also ends with [[spoiler:the Player Character becoming incredibly disillusioned with the High Heavens, realizing that Imperius' ineffectual defense of Sanctuary and hatred for humanity along with Malthael's active attempt at genociding humanity, is every bit as bad as the demons actively seeking to destroy everything. Tyrael's voice over in the ending notes that he's not sure how much longer the Nephalem can be called an ally, depending on how you see it. Ultimately, it would seem that the Nephalem's stance is that Angels and Demons need to leave humanity alone, if they keep hating and antagonizing them, then the Nephalems will strike at them, considering humanity in Sanctuary is something of a [[TheWoobie Woobie]] species.]]
* [[spoiler: Fain, of the Red Masque]] from ''VideoGame/{{Lusternia}}''. A brilliant and popular leader amongst the [[PhysicalGod Elder Gods]], he resorted to [[JumpingOffTheSlipperySlope increasingly extreme]] measures to combat the [[EldritchAbomination Soulless Ones]]. Ultimately, he and his co-conspirators began ''devouring'' other Elders to imbibe their essence and power, and were banished to the Void. Driven [[AxCrazy insane]] by [[GoMadFromTheIsolation thousands of years of isolation]], he is ''profoundly'' unhappy by the time he returns to the real world.
* ''Franchise/RatchetAndClank''
** Ace Hardlight from ''VideoGame/RatchetDeadlocked''. Ace was once a great hero before being kidnapped and forced to participate in [[CorruptCorporateExecutive Gleeman Vox's]] deadly gameshow, ''Dreadzone''. Ace eventually became seduced by the thrills and infamy of the tournament, and became the deadliest contestant on the show -- and TheDragon to BigBad Vox.
--->'''Clank:''' I do not understand. What sort of hero would kill other heroes for money?\\
'''Hardlight: '''Not money, tin man. ''Fun.''
** Also, Captain Qwark...for a given definition of 'hero'. In the [[VideoGame/RatchetAndClank2002 first]] [[VideoGame/RatchetAndClankGoingCommando two]] games he's a fame-hungry showboater willing to endanger innocents for his own glory, the [[VideoGame/RatchetAndClankUpYourArsenal third]] game reveals that he did once, however incidentally, save the galaxy once from Dr. Nefarious. He gets better in later games, as in he's less willing to endanger innocents on purpose and prefers to take credit for Ratchet and Clank's adventures.
* Tons of these in ''Franchise/FinalFantasy'' games.
** Wiegraf (and possibly Delita) in ''VideoGame/FinalFantasyTactics''.
** Sephiroth in ''VideoGame/FinalFantasyVII''. Especially evident during ''VideoGame/CrisisCore'' and its glimpses of Sephiroth's pre-fall personality -- although cool and aloof, he was actually [[http://www.youtube.com/watch?v=feQQ_OUqbXE a pretty nice guy]] and hero-grade material before the Nibelheim Incident. His ''VideoGame/{{Dissidia|FinalFantasy}}'' [[http://www.youtube.com/watch?v=SqW58sxUyGk opponents]] repeatedly mention this in their pre-fight quotes, especially in Duodecim. The crazy thing is that Sephiroth will alternate between calling himself one or declaring himself a general destroyer of life. "Taste the blade of a hero.", indeed.
*** It's funny: the heroes will either question how he could have turned or how he was ever a hero, and the villain quotes (particularly the Emperor) make it sound more like a NeverLiveItDown moment.
*** Square Enix plays with this heavily in ''Dissidia''. Many of his quotes are contradictory to his villainous nature, such as saying "Fear not." or "Do not despair."
*** AlternateCharacterInterpretation states that he would have come to his senses when he died... ''except'' the first person to kill him wasn't his genocidal former friends, or the punky, idealistic ChosenOne, but [[spoiler:Cloud]]. That's right. A pathetic, angsty, cowardly foot soldier, the lowest class of scum in Sephiroth's eyes, was the one to defeat a demigod through sheer force of will. That thought took the last vestiges of humanity in him, his pride as a First Class SOLDIER, and twisted it into something even worse than the EldritchAbomination that he had become.
** Seymour in ''VideoGame/FinalFantasyX''. [[spoiler:Subverted in that it turns out that he was never a "hero" in the first place.]]
*** Jecht, also in ''VideoGame/FinalFantasyX.'' [[spoiler:Also subverted in that [[HeroicSacrifice willingly turning himself]] into the BigBad is the [[FlingALightIntoTheFuture only thing that allows the heroes]] to finally put the ViciousCycle to an end.]]
** Garland in ''VideoGame/FinalFantasyI''. He was the greatest of the king's knights, until Princess Sarah rejected him.
* The Nameless One from ''VideoGame/PlanescapeTorment'' might qualify, [[spoiler: with some of TheAtoner thrown in. Apparently, he did something that was ''so bad'' in his first life, that he thought he'd be damned even if he did nothing but good for the rest of his life, and thus sought immortality in order to have more time to atone.]]
** In a more immediate sense, the Practical Incarnation was... not a nice person. He was also the previous incarnation with the most impact on your current situation.
* Big Boss of ''Franchise/MetalGear'' was originally a quirky, cheerful, affectionate, paternal sort of man (though he still was a supreme badass not to be trifled with), who ends up going through a major BreakTheBadass routine in ''Snake Eater'', ''Portable Ops'', ''Peace Walker'', ''Ground Zeroes'' and ''The Phantom Pain''. He [[spoiler:then ends up creating The Patriots with other "fallen heroes", Major Zero, Sigint (a.k.a. DARPA Chief, Donald Anderson), and Para-Medic (aka Dr. Clark, the head of the Les Enfants Terribles project and the one who turned Grey Fox into the Cyborg Ninja), as well as with [[MagnificentBastard Ocelot]] and EVA]] and creating Outer Heaven and Zanzibarland to plunge the world into eternal war and seek revenge against those that crushed his dreams and ruined his life, before meeting his end at the hands of his "son"/[[spoiler:clone]], Solid Snake, which was prophesized by The Sorrow, Elisa and hinted at by Paz.
** AntiVillain: The kind of 'peace' that his enemies sought was one ruled by a global totalitarian shadow state, and the eternal war that he sought was the opposite of their attempts to control and regulate the dangers of individual human will. Big Boss may have become a threat to world peace and security, but both were inextricably tied to imposed obedience, which is ultimately slavery.
** ''VideoGame/MetalGearRisingRevengeance'' brings us the Brazilian samurai Jetstream Sam. After his father was murdered, Sam took up the sword and became ''ridiculously'' good with it. He attained his revenge, and went on to reap a swath of justice across South America, just him and his little sword. Eventually he decided to take on the game's BigBad, World Marshal, [[ForGreatJustice because they were the bad guys]]. Expecting another test of mettle, he instead was forced to [[BrokenBird confront his empty ideals]] and was [[KneelBeforeZod cowed and broken before his enemy]]. After this, he resigned himself to work under World Marshal, committing acts of evil he would have once condemned, knowing he wasn't strong enough to defeat [[spoiler:Armstrong]]... but then [[PassingTheTorch along]] [[TakeUpMySword came]] [[RedemptionEqualsDeath Raiden...]]
** [[spoiler: Major Zero as mentioned above]]. To elaborate, he ''was'' directly (albeit, unintentionally) responsible for many of the things that happened in the series by creating the Patriot [=AIs=], but he [[WellIntentionedExtremist genuinely meant well]] before things [[GoneHorriblyWrong went horribly wrong]]. And by the time the [[AIIsACrapshoot AIs went rogue]], it was too late for him to realize and fix his mistake. And when ''Guns of the Patriots'' rolls around, he's fallen from grace in more ways than one, being revealed to be reduced to a ''very'' old man confined to a wheelchair, on life support and suffering from severe dementia. [[spoiler: Big Boss pulls the plug on him, and as he dies, the audience is treated to flashbacks of the Major in his younger days, emphasizing that he was a good man who went about things the absolute wrong way]]. AlasPoorVillain indeed.
* The 7 Heroes of ''VideoGame/RomancingSaGa2''. [[spoiler:Warriors who saved the world, but were betrayed by the people they saved and cast into Hell through dimensional magic.]]
* ''Franchise/MassEffect'' seems fond of this trope.
** Matriarch Benezia from ''VideoGame/MassEffect1'', having unwittingly lost herself to the very madness that she sought to stop, the ultimate tragedy being that she can't be saved.
** As of the second game, Liara seems to be the anti-hero variant of this trope in the making. [[spoiler: She gets better.]]
** Depending on your choice of background and alignment, especially if you change alignments between games, Shepard can be played as a fallen hero.
** A few characters see Shepard as a fallen hero in ''VideoGame/MassEffect2'', no matter how you play, given that they're forced to work with a terrorist group.
** The second game also gives us [[spoiler: Rael'Zorah. Tali specifically fears her father being seen as this by the quarian people after he chooses to run weapons tests on active geth prisoners in order to advance the cause of retaking the homeworld.]]
** And Shepard is definitely seen as this at the beginning of ''VideoGame/MassEffect3'' given the terrorist connection and that they was forced to kill over 300,000 people to slow down the Reaper invasion. One news report early in the game even refers to them as "the disgraced Commander Shepard".
** The Illusive Man plays the AntiHero MissionControl in ''Mass Effect 2'', seeing as how he ''brought Shepard back to life'' and gave them enough resources to take on the Collectors, albeit for his own machinations. By ''Mass Effect 3'', he's lost his mind to the Reapers' technology. [[spoiler:Literally]].
* [[spoiler:Thorndyke]] in ''VideoGame/SoulNomadAndTheWorldEaters'', a KnightInShiningArmor goes this route [[spoiler:in the Demon Path, initially submitting to The Main Character in order to save his son.]] As time goes on, he is forced to do worse and worse things until [[spoiler:he is tricked into believing that he killed his own son, turning him into an AxCrazy [[TheBerserker Berserker]]. When he later sees that his son is alive, [[TheDragon Kanan]] convinces him that he never went mad and killed because he truly enjoyed it, finally breaking him.]]
** [[spoiler:If we're talking Demon Path, Revya is possibly the biggest Fallen Hero of them all.]]
* ''VideoGame/TalesOfSymphonia'' has [[spoiler:Mithos, Kratos and Yuan, one in service of Mithos and the other one opposing him]] .
* Though it's at first ambigious, the WhamEpisode and TheReveal that [[BigBad Artorius Colbrande]] of ''VideoGame/TalesOfBerseria'' was definitely a genuine IdealHero before events put him on the wrong path.
* [[spoiler:Ghaleon]] from the ''Franchise/{{Lunar}}'' series qualifies quite well for this trope. He has a glowing reputation at the start of ''VideoGame/LunarTheSilverStar'' (and the remakes) for heroism alongside the famed Dragonmaster, Dyne. His FaceHeelTurn sends the world into a panic. [[spoiler:In the remakes, he is a WellIntentionedExtremist who sees the Goddess Althena's decision to leave humans to their own devices as abandonment. So, Ghaleon starts plotting a way to restore divine leadership to the world. And who is the new divine leader? Ghaleon! His purpose in ''VideoGame/LunarEternalBlue'' turns out to be redemption for this, though the player doesn't learn this until right at the end of the game.]]
* Jon Irenicus from ''VideoGame/BaldursGateII'' counts. Prior to his exile from [[spoiler:Sulldanesselar]], he was an upstanding citizen and powerful mage. Pride was his downfall; he was exiled and [[spoiler:stripped of his soul]] for using his power to try and achieve godhood.
* [[spoiler:Aribeth de Tylmarande]] from ''VideoGame/NeverwinterNights'' and [[spoiler:Bastila Shan]], Revan, Malak, and the entire Revanchist movement from ''VideoGame/KnightsOfTheOldRepublic''. How you play both games determines whether the spoilered characters stay evil or not.
** Also, Yuthura Ban on Korriban, who was a fallen Jedi padawan with similar motivations to Anakin when he started out (i.e. go back home and free all the slaves), who then suffered from MotiveDecay and became just another power-hungry Sith.
*** You can [[LastSecondChance point this out]]. [[HeelRealization It helps]].
* Akachi the Betrayer and a third of his Crusade from ''VideoGame/NeverwinterNights2: Mask of the Betrayer'' are all Fallen Heroes, the dragon and the army of undead having been evil to begin with. Arraman might also qualify, depending on your character interpretation.
** And the King of Shadows from the original campaign, whose mission to defend the Illefarn Empire suffered severe MotiveDecay when he escaped from his extradimensional prison and found that the Empire crumbled to dust millennia past.
* ''VideoGame/SkiesOfArcadia'' features Ramirez, TheDragon to [[BigBad Lord Galcian]]. He's described as having once been pretty similar to Vyse -- artistic, kind-hearted, and loyal. Unfortunately, he was raised in near-isolation by the most arrogant culture in the game and coming into contact with the meaner parts of Arcadia proved a little much for him.
* ''VideoGame/{{Disgaea 3|AbsenceOfJustice}}'' has an example of its own [[spoiler:in Super Hero Aurum. He was originally a hero who fought some of the greatest villains his world has ever known, but the more he fought, the further he fell towards obscurity, which he feared more than anything else. He needed to relish in being known as a hero, so he began doing worse things over the years, up to and including killing a nice guy Overlord and raising his son to be a general asshole Overlord just so he could be a hero again. As Sapphire put it, he eventually "ignored being the hero".]]
** Which of course raises the question of what the hell he was doing when "The God of All Overlords" showed up in Disgaea 2, but then again [[RuleOfFunny the series isn't really known for it's continuity.]]
* Beldr from ''VideoGame/DevilSurvivor'' is Baldr, god of light and beauty from Myth/NorseMythology. After he became trapped in the underworld as a giantess refused to weep for him, he became determined to spread lament on the Earth until everything cries.
** For extra bonus points? It's implied that said giantess was actually Loki.
** From the same company, various hints have been dropped by [[WordOfGod Atlus]] saying ''something'' happened to [[{{God}} YHVH]] to make him what [[GodIsEvil he]] [[KnightTemplar is]] [[ItsAllAboutMe today]].
* Malin Keshar from ''VideoGame/BattleForWesnoth'' attempted to use necromancy to defend his home village of Parthyn. However, after being rejected by his own people due to the bad reputation that necromancy has, he becomes the apprentice of Darken Volk, and begins to despise everyone more and more until he's a full-blown VillainProtagonist.
* Tempest Hawker from ''VideoGame/SuperRobotWarsOriginalGeneration'' was once a member of TheFederation Aggressor unit. After [[CynicismCatalyst losing his wife and daughter]] in the Hope incident, he will do anything to get revenge on the Earth Federation.
* Boy, does ''VideoGame/ViewtifulJoe'' have these...
** In the first game, [[spoiler:''Captain Blue'' is the one masterminding to escape from Movieland to take over the real world, having lost his stride ''twice''. In the real world, he was hailed as revolutionary director, having created several good movies, but then he lost all of that. He just wanted to create more heroes. He was then somehow sucked into one of his films, and he lived all of the great adventures he wanted, but then he figured something out: the world was too good to last, he started to want revenge against the people of the human world.]] Thankfully, he got some sense knocked into him.
** May not count, but the second game gives us [[spoiler:Jet Black, who wanted to become a film maker to show his son what a true hero was. He then found the [[ArtifactOfDoom Black Film]], which started to eat at his desires, eventually twisting his desire to make a film about heroes to ''[[BecomingTheMask actually wanting to be the hero]]'', and was going to take over the world.]] Again, he got some sense knocked into him.
* The World Corp storyline in ''VideoGame/TheNamelessMod'' allows you to be this.
* ''Franchise/{{Castlevania}}''
** Mathias Cronqvist, friend to [[VideoGame/CastlevaniaLamentOfInnocence Leon Belmont]], brilliant strategist, noble Crusader, and genius alchemist. The death of his wife Elizabetha shattered his faith in God and he became obsessed with obtaining immortality so that he could curse God forever. And thus was [[spoiler:Dracula]] born.
** Gabriel Belmont in the series reboot ''[[VideoGame/CastlevaniaLordsOfShadow Lords of Shadow]]'' is shaping up to be this. Despite his valiant efforts in the first game to cleanse the world of dark beings, the DLC epilogue chapters and post-credits epilogue cutscene suggest that in his time fighting the darkness, it somehow inadvertently rubbed off on him -- and his proximity to it ultimately resulted in his transformation into Dracula.
* [[spoiler:Wander]] from ''VideoGame/ShadowOfTheColossus'' becomes one of these. [[AlternateCharacterInterpretation Assuming that you think that he was heroic to begin with/villainous in the end...]]
* Michael Jordan, of all people, in ''VideoGame/BarkleyShutUpAndJamGaiden''. The fact that ''Film/SpaceJam'' is canon to the game's storyline only amplifies this.
* ''Franchise/DragonAge''
** [[WellIntentionedExtremist Teyrn Loghain Mac Tir]] from ''VideoGame/DragonAgeOrigins''. In the prequel novels he slowly becomes a high-ranking officer for the rebels, and is later hailed as a noble and one of the greatest war heroes along with King Maric as they win and drive out the Orlesians. Sadly, he becomes so protective of the kingdom he's fought for, that he gradually [[SanitySlippage turns]] [[GeneralRipper extremely]] [[IDidWhatIHadToDo paranoid]], and goes as far as to [[spoiler: leave Maric's son, the current king, to die in the battlefield when he suspects him of trying to sell Ferelden out and framing the Grey Wardens, triggering one of the game's two main plots.]]
** Although many people forget this part of her backstory, Meredith from ''VideoGame/DragonAgeII'' was also this trope, as she became Knight-Commander after overthrowing the previous viscount of Kirkwall, Perrin Threnhold, when he tried to expel the templars from the city. While not everyone looks upon the templars fondly, Perrin Threnhold is generally regarded as a tyrant and robber baron who brought about his own demise. In the end, Meredith's paranoia over blood magic [[SanitySlippage drives her utterly mad]] and [[spoiler: she tries to use an ArtifactOfDoom to kill Hawke.]]
** [[spoiler: Anders, one of your party members who was once a heroic and kind-hearted Grey Warden, becomes a WellIntentionedExtremist due to sharing a body with a spirit and the general stress of Kirkwall.]]
** [[spoiler:Solas, aka Fen'Harel]], of ''VideoGame/DragonAgeInquisition'' was once a revolutionary who fought against [[spoiler:the false elven gods]] to free his people from slavery. Now, that he's seen how badly things went for them after [[spoiler:he erected the Veil, he plans to tear the entire thing down again -- with the full knowledge that doing so might very well destroy the world.]]
* In ''VideoGame/RedDeadRedemption'', Dutch Van Der Linde was, according to John Marston, an idealistic romantic who was essentially the western Robin Hood. However, at some point, he went insane, likely due to the realization that all of his efforts won't bring any true change in the end. Now, he's gone absolutely AxCrazy.
* Jack Krauser from the ''Franchise/ResidentEvil'' series qualifies as such, especially when Darkside Chronicles paints him with an initially heroic light, but after his arm was heavily injured (which resulted in him being fired from SOCOM due to it never recovering), as well as becoming increasing envious towards Leon, he eventually fell to the depiction of him in ''VideoGame/ResidentEvil4''.
* Sepulchre from ''VideoGame/DragonFable''.
** Vilmor, in the Dragon's Grasp arc, had been imprisoned for destroying the town of Bask and hurting the trust of great ice dragon Cryozen (which Vilmor had bonded with). [[spoiler:Subverted big time. It turns out that [[SamusIsAGirl SHE]] wasn't responsible for the destruction of Bask, Dragon Master Frostscythe was, and she was just looking for Cryozen before it died. Furthermore, Frostscythe was her childhood friend who felt that he was shortchanged by the Dragon Lord order because of his ice elf lineage; the whole Bask incident was an elaborate ploy to sever the bond of trust between dragon and Dragon Lord.]] [[ItMakesSenseInContext Before you ask, yes.]]
* Malefor, the BigBad of ''VideoGame/TheLegendOfSpyro'' trilogy was implied to be one. Statues of him dot the Dragon Realms, including the training area of the Dragon Temple. Prowlus also claims that Spyro [[NotSoDifferent is just like Malefor at his age...]]
* {{Subverted|Trope}} in ''VideoGame/{{Touhou}}'' with Byakuren's back story. She was a revered nun in ages past, but realizing her own mortality after the death of her brother Myouren, she dabbled with witchcraft and began seeking immortality. At the same time, she began empathizing with the {{youkai}} she was sworn to hunt and destroy/seal. She quietly started to wonder if she couldn't make a peaceful coexistence work, but the people were angered by both her immortality research and her growing empathy and had her sealed for a millennium in Makai. Thankfully, even after being released, she's one of the kindest characters in the setting and keeps fighting for coexistence. In other words, losing her status and starting from the bottom [[ToBeLawfulOrGood only served to make her a better person, if still flawed]].
* In ''VideoGame/MegaManX'', series BigBad Sigma was once the heroic commander of the Maverick Hunters, but eventually turned Maverick himself and decided to lead a revolution against the very humans he was sworn to protect. ''VideoGame/MegaManX4'' reveals that the root of this took place while Sigma was fighting Zero, when he was still an AxCrazy Maverick: Sigma inadvertently released and thus became infected by the Zero Virus he carried (while Zero himself was simultaneously [[HeelFaceTurn purged of it]]).
* In the MMORPG ''VideoGame/MapleStory'', [[spoiler: Empress Cygnus in the future. Because they were weaker than the regular adventurers of the Maple World (shown by the fact that they can only go up to level 120 instead of the regular 200), Cygnus wanted to increase the power of her knights so they could match up with the rest of the world. To do so, she looked for the Tree of Life, which she found. However, it was a trap laid by the Black Mage, and combined with their crippling insecurity, the Empress and her knights were corrupted by the Black Mage, and began to destroy the Maple World.]]
* Dirk from ''VideoGame/ValkyriaChroniclesII''. [[spoiler: Ready for a whopper of a spoiler? He is actually Leon Hardins, older brother and idol of the protagonist. An exceptional militiaman, he was selected for a "special mission" -- being [[PlayingWithSyringes subjected to human experimentation]] that [[BeingTorturedMakesYouEvil stripped him of his humanity]]. And so he ends up fighting for a genocidal band of insurrectionists.]]
* According to the instructions manual for ''VideoGame/SuperMarioBros'', [[TheGoomba Goombas]] were said to be former residents of the Mushroom Kingdom who betrayed Princess Peach and the Toads and sided with [[BigBad Bowser.]] Not so much in later games, where some Goombas are instead portrayed as allies.
* The cast of ''VideoGame/LastScenario'' is littered with heroes and wannabe-heroes who are used, deceived and broken in various ways, so naturally one of these ([[spoiler: Castor, the game's BigBad]]) would come out of it, while the game details his descent down the [[SlidingDownTheSlipperySlope slippery slope]], until even his most loyal allies join the other side in an attempt to bring him back..
* Whether Abysswalker Artorias is this or a DefectorFromDecadence is the subject of much debate in ''VideoGame/DarkSouls''. Artorias was one of Lord Gwyn's four great knights, making him one of his top lieutenants. An unknown number of years ago, the Darkwraiths (Humanity devouring dark knights of the darkness) appeared. They were so [[GodzillaThreshold dangerous]] that it eventually resulted in outright sacrificing a city. Artorias was charged with hunting the Darkwraiths, but instead joined them for reasons that are not known.
** The DLC elaborates on Artorias' story. He did not join the Darkwraiths, but rather was rewarded for stamping them out with a blessed pendent. However, in a unrelated event in Oolacile, Artorias [[spoiler: is defeated by Manus, the Father of the Abyss, who also appears to have single handedly destroyed most of the country in the process]]. As a result of this, Artorias is not only corrupted, but appears to have been driven irredeemably mad and needs to be put down at the players hands.
* [[spoiler:Lobelia]] used to be a good guy a thousand years ago in ''VideoGame/DuelSaviorDestiny'', but due to a combination of resentment, a persecution complex, envy and genuinely believing that a world built around the strong dominating the weak would be best, she eventually turned on her companions and nearly caused the end of the current world order. In the present, her importance towards this aim has declined, but she's still working towards it as bitterly as ever.
* ''Franchise/SlyCooper''
** In ''VideoGame/Sly2BandOfThieves'', Sly refers to Jean Bison as one who became this way due to being [[FishOutOfTemporalWater displaced by time]] rather than actually becoming evil; Sly remarks (and even pities) that in his own time of the mid 19th century Jean would have been hailed as a pioneer and a hero for wanting to tame and develop the west, but in the modern era where protecting the environment is much more prevalent, he's a villain instead.
** [[spoiler:Penelope]] in ''VideoGame/SlyCooperThievesInTime''. [[spoiler:She [[FaceHeelTurn joined]] [[BigBad Le Paradox]] because she believes she and Bentley were [[TheyWereHoldingYouBack being held back from their true potential by 'working for chump change']]. Bentley [[HeroicBSOD doesn't take it well]].]]
* Ulfric Stormcloak from ''[[VideoGame/TheElderScrollsVSkyrim Skyrim]]''. Precisely where he stands on the sliding scale of anti-heroes/anti-villains is up for debate, but it's definitely lower than where he started out; a former student of the Greybeards and Imperial Legion officer, he used the training he received while studying to become a pacifist monk to commit regicide and ignite a civil war against the very empire he once served. [[GreyAndGrayMorality He has]] [[TraumaCongaLine his reasons]], though.
* In ''VideoGame/DisneyPrincessEnchantedJourney'', the BigBad, Zara, is an ex-princess who refused to learn princess virtues and was banished from her kingdom as a result. She came back with evil powers and sought to ruin worlds of other princesses and stop girls from becoming princesses.
* While not the main character of ''VideoGame/{{Ravenmark}}: Scourge of Estellion'', Livia Cassianus is, nonetheless, an important character, being the protagonist's LoveInterest and a member of the Court of Shadows, the Imperial House's highly-trained spies and assassins (all {{Heroic Bastard}}s of said House). Livia is a good-hearted, noble person. This is why the late Emperor Sergius Corvius has been secretly grooming her as his successor over his own legitimate children (his eldest daughter doesn't want the job anyway). After Grecian, Sergius's son, is overthrown by LaResistance, Livia is crowned Empress Livia Corvius and personally leads the Imperial Mark against the invading Kaysani hordes. But when the BigBad Alejo de Porres [[spoiler:chooses to [[TakingYouWithMe suicide-bomb himself]] to kill Livia, her lover Calius Septim, the main character, sacrifices himself to keep her safe. Livia becomes determined to punish all responsible]]. ''Ravenmark: Mercenaries'' takes place 6 years later. By this time, Livia is known as the Scarlet Empress for her brutal policies and unwavering desire to crush all enemies of the Empire, both domestic and foreign. In large part, she is responsible for Estellion becoming a VestigialEmpire, barely strong enough to fight the newly-arisen Varishah Federation and the formerly-allied Commonwealth of Esotre in a three-way stalemate. Additionally, one of the most important cities in the Empire has seceded and remains a haven for mercenaries.
* Cody Travers from ''VideoGame/FinalFight'' and later the ''Franchise/StreetFighter'' series. While it is not actually seen in the games, multiple games tell the story of his downfall, which occur after the ending of the original ''Final Fight''. Cody and his friends go out to save his girlfriend from the BigBad in ''Final Fight''. On the way, [[BeatEmUp he beats up]] a corrupt cop named Edi, who later arrests the hero for assault in battery. Next, his girlfriend dumps him, and [[PutOnABus leaves the country to study abroad]]. Afterwards, he is let out of jail and tries to get revenge by fighting criminals outside. He gets arrested again, and becomes addicted to fighting within prison. He then eventually breaks out, and joins the Street Fighting cast in their tournament(s). After all these events, he usually claims that he will never be the hero again, and often states that all he has left is fighting (which he often exclaims is pointless).
* Izbel from ''VideoGame/TearsToTiara2'' is an interesting case. She does a FaceHeelTurn [[spoiler: but she was ordered to do so as the final order of her commander and the man she loves. And the entire string of events, and really her entire life, has caused her to loose faith in people.]]
* ComicBook/SpiderMan himself becomes one if you obtain the [[EvilIsCool Bad (but admittedly awesome) Ending]] for ''VideoGame/SpiderManWebOfShadows''. [[spoiler:Should the player refuse to resist the Symbiote's temptation at ''every'' instance it comes up [[EarnYourBadEnding (not easy, by the way)]] Spidey becomes a villain more evil than any he ever fought, rejecting all his friends and allies, murdering Venom, and ruling a New York overrun with Symbiotes, the infected Black Cat as his queen.]]
* [[spoiler:[[ProtagonistJourneyToVillain Captain Walker]]]] in ''VideoGame/SpecOpsTheLine''. [[spoiler:He originally came to Dubai to help the stranded American regiment there. By the end of the game, however, his obsession with being a hero has caused him to massacre the very people he was supposed to save, horrifically slaughter dozens of refugees by accident with white phosphorus, condemned the remaining refugees to a slow, agonizing doom via dehydration, and lead his comrades to their entirely preventable deaths.]]
* Green in ''VideoGame/GunstarHeroes'', was the strongest of the Heroes, but betrays Red, Blue, and his sister Yellow by deciding to join the villains plan to revive the evil god Gold. [[spoiler: He does a HeelFaceTurn in the end and sacrifices himself to stop Gold.]]
* ''VideoGame/BorderlandsThePreSequel'', a {{interquel}} for the two main series games, reveals that ''VideoGame/{{Borderlands 2}}''[='s=] BigBad Handsome Jack was one of these. In ''The Pre-Sequel!'', Jack is shown as a noble and good-hearted man (though still ambitious and bloodthirsty) who's willing to step up and fight and helped save Pandora's moon Elpis. However, a series of devastating events including several betrayals as well as [[spoiler:having a repository of alien knowledge downloaded into his brain]] fractured his mind and turned him into the [[ItsAllAboutMe egotistical]] DirtyCoward and ComedicSociopath seen in the second game. It also reveals the origin of his iconic mask and his "Handsome" nickname: [[spoiler:his face was scarred by Lilith, which also explains why he's fixated on killing the Vault Hunters and everyone they ever cared about]]. Not to mention that he [[spoiler:subjected his daughter, Angel, to her torturous imprisonment BEFORE he went insane]]. However, ''The Pre-Sequel!'''s narrator, Athena, feels that [[ThatManIsDead Jack, the Hero of Elpis died]] and Handsome Jack is nothing but a grotesque mockery of everything he once stood for.
** The whole point of the interquel is that Jack the Vault Hunter was always screwed up, but he had some redeeming traits until a combination of [[NeverMyFault his own actions]] and the [[CreateYourOwnVillain actions of OTHER mentally deranged individuals]] turned him into a monster. Jack AND Pandora made Handsome Jack. Just to hammer the point home, Lilith starts going down this route as well when she [[spoiler:orders Athena's death by firing squad]], to the chagrin of her teammates; it shows how the torture and the loss of her boyfriend is slowly eroding her already fractured conscience, much like Jack.
* Tatsumaru from ''VideoGame/{{Tenchu}} 2'' only turned to evil after a case of amnesia. He got his memory back but chose to fight for the bad guys out of guilt (and he's in love).
* Gelu from ''Videogame/HeroesOfMightAndMagic''. He's a heroic champion in the third game who valiantly aids Queen Catherine and Roland in their efforts to prevent the Kreegans from destroying Enroth with Armageddon's Blade. In the prequel ''The Shadow of Death'' he is also one of the four heroes who thwarts Sandro's schemes of world conquest. Things take a turn for the worse after Catherine makes the mistake of trusting Gelu with Armageddon's Blade after the Kreegans' defeat. Gelu slowly becomes more enamored with his new sword's immense power and begins to dream of conquering the world with it to [[WellIntentionedExtremist fix its problems]]. When he hears a prophecy that Enroth will be destroyed if Armageddon's Blade ever clashes with the Sword of Frost, Gelu refuses to do the logical thing by destroying the Blade -- instead, he seeks out the Sword of Frost in an effort to avert the prophecy despite Tarnum's warnings that doing so will merely hasten it. When the mad barbarian king Kilgor acquires the Sword of Frost and starts a war with it, Gelu (again ignoring Tarnum's warnings) faces him with the Blade. The resulting clash triggers the Reckoning which destroys Enroth. In the end, Gelu's ambition and refusal to let go of power doomed everything he once defended. Even more ironic since Gelu ultimately did what he prevented the Kreegans from doing: setting the world ablaze with Armageddon's Blade.
* Dante from ''Videogame/DantesInferno'' was regarded as a noble Christian warrior who cared for his family. Until he indulged himself in numerous sins because he believed that a SinisterMinister absolved him of ''all'' sin. Once Dante enters hell, he learns why he is being punished for eternity and is given TheReasonYouSuckSpeech by his loved ones for losing his good graces. However, a part of his quest in the game is for him to rise up from the abyss and live up to his noble heroics.
* In ''Videogame/TransformersWarForCybertron'', Starscream was once a heroic autobot before becoming fascinated with Megatron's dark, unnatural powers. So he chose to follow him as his second-in-command and annihilate other autobots standing in their way.
* Once again proving that Creator/BlizzardEntertainment [[CreatorThumbprint loves this trope]], ''VideoGame/{{Overwatch}}'' has a few of its own. The Overwatch organization was once led by idealistic hero Jack Morrison and [[TheLancer his buddy Gabriel Reyes.]] [[spoiler:Unfortunately, [[ItsAllAboutMe Reyes became a little too jealous of Morrison]] and staged a series of events that dismantled Overwatch, seemingly killing him and Morrison. Reyes came BackFromTheDead as the terrorist Reaper, feeding off the souls of his victims to stay alive. Meanwhile, Morrison survived as well, but seeing that his heroism didn't exactly make the world a better place, he became a ruthless AntiHero to find out what led to Overwatch's shutdown as Soldier: 76.]]
* In ''VideoGame/FireEmblemFates: Conquest'', due to the combination of the Avatar choosing Nohr over Hoshido, lingering jealousy, resentment, self-esteem issues and [[spoiler:a little side helping of DemonicPossession]], [[spoiler:Prince Takumi]] goes from a kind, if abrasive young man, to a monster.
* In ''VideoGame/{{Sinjid}}'', Warlord Izumi, the second warlord you're tasked with killing, was once a noble war hero who led the Imperial Army to victory. After war broke out with the Shogun, however, [[DirtyCoward he turned against his allies out of fear of losing the war]], and they forced him into hiding before sending you in to finish the job. [[spoiler: Kasumi, the strongest Shinobi unit in the Imperial Army also falls into this category, abandoning her allies after being convinced by [[ManipulativeBastard Kazuro]] to switch sides]].
* ''VideoGame/TheElderScrollsIIIMorrowind'' provides several examples:
** Dagoth Ur, [[MadGod deranged]] PhysicalGod BigBad of the main quest, was once Voryn Dagoth, the trusted advisor of ancient Dunmeri hero Lord Indoril Nerevar. After [[OurDwarvesAreDifferent the Dwemer]] disappeared, Nerevar entrusted Dagoth with protecting the [[CosmicKeystone Heart of]] [[GodIsDead Lorkhan]] and the Dwemeri crafted tools needed to tap into its power. Depending on the [[TheRashomon version of events]] that followed, Dagoth was either corrupted by the Heart's power into using the tools, or used them to try to ''[[GodzillaThreshold prevent]]'' Nerevar's other advisors (who were quite likely responsible for Nerevar's death), the Tribunal, from tapping into its power themselves.
** A much more clear example is [[spoiler: Almalexia]] in the ''Tribunal'' expansion. She, like Dagoth, advised Nerevar (her husband), and used the [[PhysicalGod divine powers]] she gained from tapping into the Heart to help the people of Morrowind time and again over the course of several millennia. However, as a result of the player's actions in the main quest of the main game, [[spoiler: she (like the other members of the Tribunal and Dagoth Ur) are permanently cut off from the Heart's power. [[GoMadFromTheRevelation Almalexia does not take the loss of her godhood well]] and becomes the BigBad of the expansion.]]
* Superman is this in ''VideoGame/InjusticeGodsAmongUs'' and it's sequel ''VideoGame/Injustice2''. The Joker tricks him into killing Lois Lane and his unborn child and nuking Metropolis, leading to him killing the Crown Prince of Crime in a fit of rage. And then it just goes downhill from there as he basically takes over the world in order to make it a better place, killing criminals and even a few heroes as he falls deeper and deeper into the abyss. Several other heroes join his crusade including Wonder Woman, Flash, Green Lantern, Shazam, and even some villains join such as Sinestro, Killer Frost and Black Adam. He ends up doing some truly despicable things such as [[spoiler:killing Shazam in a slow and painful fashion]] when he dares bring up that Supes has gone too far.

[[folder:Visual Novels]]
* Archer in ''VisualNovel/FateStayNight''. Contrary to the page quote, he died a hero and ''still'' saw himself become the villain. Technically, he still believes that his ideal is correct, he just realizes that it's way bloodier than he thought it would be and would rather not exist than be forced to continue with it. He pulls off a pretty impressive BatmanGambit to do so.

[[folder:Web Comics]]
* Smilling Man from ''Webcomic/TheCrossoverlord''. Once the greatest hero of his universe, after the death of his beloved wife, he turned into a MultiversalConqueror.
* Both Miko and Redcloak in ''Webcomic/TheOrderOfTheStick''. While neither of them were ever truly heroes, both were, at the bare minimum, decent people, before their MoralEventHorizon. The former actually fell, losing her paladin powers. Overall she was a milder example than Redcloak, as she at least tried to keep doing good, but never quite managed it due to her pride.
* [[spoiler: The Boogeyman]] from ''Webcomic/NightTerror'' is one. Long before the events of the series, he was actually [[spoiler: Tybalt's brother, Bo. He always lived in his brother's shadow, and eventually [[DrivenToSuicide committed suicide]] out of hopelessness, rising again as BigBad of the series.]]
* TAGII from ''Webcomic/SchlockMercenary''. Oh, TAGII. She starts out as a highly intelligent AI for the good guys[[spoiler:, then loses sensory input for all of 5 minutes, rewrites her base code, and proceeds to go on a rampage, [[http://www.schlockmercenary.com/2012-12-11 starting here]], releasing a Pa'anuri, destroying the Morokweng- killing thousands and making the Toughs public enemies to the UNS- and then starts killing the Toughs themselves, starting with Thurl and Para, who fortunately has the AI kill switch on her.[[http://www.schlockmercenary.com/2012-12-31 Of course, unbeknownst to her, TAGII survived...]]]]
* Subverted by [[WorldsStrongestMan Guardian]] in ''Webcomic/{{Sidekicks}}'', who was believed to have betrayed the Committee, but played completely straight by [[spoiler:[[AlwaysSecondBest Dunkelheit]]]] who was the real betrayer and soon became the villain [[BigBad Metheos]].
* Jyu Viole Grace from the second season of ''Webcomic/TowerOfGod'', the identity of the grown-up [[spoiler: former hero and WideEyedIdealist 25th Baam from season 1]]. After being betrayed and nearly killed by the person he looked up to and trusted the most, as well as experiencing several other traumatizing events, he grew frustrated from the system that fulfilled some people's dreams while crushing the last hopes of many others. As a result, he joined the fanatical religious crime syndicate [[TheRevolutionWillNotBeCivilized FUG]], known enemies of the [[TheEmpire Zahard monarchy]], making himself a public enemy. He became an AntiVillain, destroying other peoples dreams and aspirations as he trained himself to kill the King and his retainers, many of whose relatives he had befriended in early years.

[[folder:Web Original]]
* In ''Roleplay/TheGamersAlliance'', [[AntiVillain Kagetsu I]] was originally a revered hero until his dream of a better world drove him to attempt to [[UtopiaJustifiesTheMeans destroy the world and create it anew as an utopia]]. [[SnarkKnight Cain]] and [[spoiler:[[HeWhoFightsMonsters Refan]]]] end up falling as well, the former because he was near death and ended up in the care of a corrupter, and the latter because he wanted to [[FakeDefector join the demons]] (who actually ended up being savvy enough and used his own lingering darkness and doubts to corrupt him instead) to gather intel behind their backs and to avenge his adoptive little sister's death.
* Mister America, from the ''Roleplay/GlobalGuardiansPBEMUniverse'', fought the Nazis, helped defeat them, and came back to a hero's welcome. He took off the costume, revealed his real name, and went to Hollywood to become an actor. And then he threw it all away by testifying before the [=McCarthy=] hearings as a friendly witness. He's since tried to make multiple comebacks, but every time he does, someone reminds him of the day he left his friends swinging in the wind before a hostile Congress.
* In Literature/{{Worm}}:
** [[spoiler:Armsmaster]] is admittedly [[GlorySeeker not the nicest hero]] in the parahumans setting. However, in the Extermination arc, he finally goes all the way overboard, [[spoiler:endangering the truce that gives a slim chance against Endbringer attacks simply for his [[EngineeredHeroism own career]]]] -- a move which has him [[TreacheryCoverUp quietly placed under house arrest]] (although [[spoiler:he is allowed to escape in order to become the superhero Defiant]]).
** [[spoiler:Panacea]] was considered one of the most selflessly heroic people in the entire Brockton Bay until the successive psychological stresses she suffered because of [[spoiler:Tattletale, Marquis, Bonesaw, and Jack Slash]] made her crack and [[spoiler:accidentally inflict total BodyHorror on her sister]].
* In ''Monster Girl Encyclopedia'', the monster army has a whole unit made up purely from this trope. These people were heroes who failed their mission to slay the Overlord. Men are charmed and women become [[HornyDevil succubi]]. The old comrades then reform their party under command of the Demon Lord. It's played for laughs, although they're probaly the most powerful fighting force in the Overlord's army, but the former heroes are mostly too busy screwing their heroines and are only seen in actual combat when there's a serious threat.
* ''WebVideo/TheNostalgiaCritic'' was once an ethical person who tore apart movies that were only in it for the money and defended how children shouldn't be exposed to bad products. Later, he only does reviews because he admits that he's only in it for the money and casually kills kids a few times.
* [[WebVideo/AtopTheFourthWall Linkara]] was well on his way to becoming a very tragic (for him and the rest of the world) one of these before [[EmpathicWeapon Margaret]] stepped in, prompting a journey where he had it thrown in his face just what he was becoming.
* [[WesternAnimation/CaptainPlanetAndThePlaneteers Captain Planet]] becomes one in the "Funny Or Die" series wherein he eventually turns every human on earth into a tree. [[WeaksauceWeakness He's taken down by woodpeckers]].
-->'''Captain Planet:''' THE POWER IS MINE, BITCHES!
* Creator/GavinFree suffered this briefly after a LetsPlay in ''[[LetsPlay/AchievementHunterGrandTheftAutoSeries Let's Play Grand Theft Auto IV]]'' episode "Cops n' Crooks IV" when he purposely sabotages Team Lads' attempts to catch Team Gents when he's behind the wheel because [[VictoryIsBoring it wasn't fun winning all the time]]. Creator/MichaelJones is so angry over this, he kicks him off the team. He comes back full time a few months later after successfully aiding Team Gents in ''[[LetsPlay/AchievementHunterMinecraftSeres Let's Play Minecraft]]'' episode "Lava Wall".

[[folder:Western Animation]]
* A dark version in ''WesternAnimation/AvatarTheLastAirbender'' is [[spoiler:Hama]], a [[CoolOldLady seemingly nice old woman]] from the South Water Tribe living in the Fire Nation. In her youth, she was one of the best waterbenders of the tribe, and fought unceasingly to protect it from the Fire Nation invaders. After repeated skirmishes to capture the waterbenders, [[SoleSurvivor she was the only one of them left in the tribe]] and ultimately got captured and thrown into prison with the rest, [[TailorMadePrison kept away from any water source]] and [[PoWCamp left to rot for the rest of her life]]. While imprisoned she [[EurekaMoment discovered a simple but revolutionary truth]]: [[spoiler:living things are made of water and [[PowerUp during full moons]] [[PeoplePuppets she can use the empowered bending to control them]]]], and improved her bending in secret until she was ready to escape and [[SheWhoFightsMonsters terrorize the people]] [[WoobieDestroyerOfWorlds of the nation that]] [[BeingTorturedMakesYouEvil made her life hell]].
* ''WesternAnimation/JusticeLeague'':
** The Justice Lords, following the death of their Flash, became {{Knight Templar}}s and transformed their earth into a metahuman-ruled {{dystopia}} where dissidents and supervillains were lobotomized. [[Quotes/FallenHero The Superman quote]] from the episode "A Better World" is given just before he crosses the line and kills Luthor, who was responsible for Flash's death, with his heat-vision.
** Shayera Hol, [=AkA=] Hawkgirl was considered this after it was discovered she was TheMole during the Thanagarian Invasion, which caused her to leave the League, though Alfred begged to differ. However, upon rejoining the Justice League, she became a hero again, but discarded the name "Hawkgirl", due to the lies, disgrace, and treachery that the name carried. Therefore as of ''Unlimited'', Shayera considers her alter ego to be a fallen hero.
* ''Two-Face'' again, this time in ''WesternAnimation/BatmanTheAnimatedSeries''. Before his [[FaceHeelTurn transformation]], Harvey Dent was a regular character on the show -- an ally of Gordon, and [[TearJerker Bruce Wayne's closest friend]]. In the series' final episode, Dent becomes [[spoiler:an AntiVillain known as The Judge, and actually tries to kill The Penguin, Killer Croc, and various other hardened criminals... including himself (of which his two previous personalities are unaware)]]. Thus does he (somewhat) gain his redemption.
* Ethan Bennett was a similar character on ''WesternAnimation/TheBatman''. He was an honest cop and a close friend of Bruce until after already under stress due to an argument with Chief Rojas, he became the victim of MindRape by ComicBook/TheJoker, and was then exposed to the villain's Joker Putty, turning him into a clay-like monster. The whole experience drove him mad, and turned him into this continuity's version of Clayface, who was more than capable of murder.
%%* Morgana in ''WesternAnimation/WinxClub'' until her HeelFaceTurn.
* In a BadFuture episode of ''WesternAnimation/DarkwingDuck'', Gosalyn winds up traveling to the future when trying to stop Quackerjack and Megavolt from doing so. Upon arrival, they find out that [[AllCrimesAreEqual it was the Justice Lords]] taken UpToEleven, as Darkwing became "[[DarkerAndEdgier Darkwarrior Duck]]", complete with [[RedEyesTakeWarning red eyes]], out of grief over Gosalyn having "run away". He became nigh-catatonic until he saw [[YouRemindMeOfX a girl resembling Gosalyn]] getting her doll stolen, losing his moral compass in the process, to the point that he threatened people for ''eating unhealthily'' and dismissing Launchpad when the latter suggested arresting criminals prior to executing them.
* ''Franchise/{{Transformers}}'':
** ''WesternAnimation/TransformersAnimated'':
*** Blackarachnia. Getting abandoned on a hostile planet and suffering nasty BodyHorror involving a GiantSpider or twenty would make ''anyone'' a little bitter.
*** Wasp, who, after being falsely accused of being a traitor, spends over 50 years in a prison and goes insane. [[JerkassWoobie Poor]] [[TheChewToy guy]]. That's not to say that he was a decent guy. As Bulkhead put it, "You may not have been a traitor, but you were never a good bot."
** Wheeljack from ''Anime/TransformersArmada''. After believing that Hot Shot abandoned him and left him for dead, he does a FaceHeelTurn and joins the Decepticons. He comes back for revenge.
** An earlier one: [[spoiler:Rhinox]] from ''WesternAnimation/BeastWars'' becoming [[spoiler:Tankor]] of ''WesternAnimation/BeastMachines''.
** Depthcharge was apparently a model Maximal before Rampage wiped out Colony Omicron, turning him into a grim and obsessed hunter.
** And Megatronus Prime, the thirteenth original Transformer. You should know him as the Fallen, with his original name being taken by Megatron, who in most continuities idolized him enough to take his name.
** Megatron himself generally follows this in most continuities. What usually happens is, at first, the Autobot regime is corrupt and dictatorial, and Megatron rebels against that, being a genuinely heroic revolutionary fighting for social change (often for the sake of a highly oppressed working class). Then right around the time he actually manages to get rid of the 'bots responsible to the point where the Autobots have enacted the change he wanted and become a genuinely morally upstanding society, the stress and thrill start driving him to become even more evil and power-hungry than the ones he was fighting, and so the civil war he started continues with the "good" and "evil" labels having switched somewhere along the way.
* ''WesternAnimation/DannyPhantom'' finds this as his [[BadFuture future]]. He did some pretty disturbing things in that future, including murdering his ''human self'' along with probably hundreds of others and doing millions in property damages...at least. Quite shocking, given the otherwise childish, campy tone of the series. Danny, upon seeing this, is [[FutureMeScaresMe extremely horrified by his actions]].
* Shego in ''WesternAnimation/KimPossible'', according to her backstory.
* In ''WesternAnimation/ChallengeOfTheGoBots,'' Cy-Kill was once one of the High Protectors of Gobotron. (And Leader-1's best friend.)
* ''WesternAnimation/TeenTitans'' had Terra, who started off as a good-natured girl with unstable powers, but was eventually drawn to becoming [[BigBad Slade's]] apprentice in exchange for him teaching her to control her powers, leading to her betrayal and becoming a villain.
* [[KnightOfCerebus Chase Young]] of ''WesternAnimation/XiaolinShowdown'' used to be a heroic monk under Grand Master Dashi, until [[TheCorrupter Hannibal Roy Bean]] convinced him to trade his soul for an immortality potion. Since then, he's been one of the world's greatest evils.
* ''WesternAnimation/MyLittlePonyFriendshipIsMagic'': Princess Luna, the very first villain of the series, is a [[PhysicalGod physical]] [[FallenAngel goddess]] who, alongside her older sister Celestia, once co-ruled Equestria, managed the day-night cycle and fought to defeat the MadGod [[RealityWarper Discord]] and the tyrannical King Sombra. A combination of perceived ingratitude on the part of her subjects and a vaguely-defined dark force corrupted her into the vengeful "[[SuperpoweredEvilSide Nightmare Moon]]", and Celestia was forced to [[SealedEvilInACan seal her away in the moon]] to prevent her from [[OmnicidalManiac bringing about global extinction]] through TheNightThatNeverEnds, but when she escapes, she's ultimately redeemed rather than killed. (The second season's HalloweenEpisode focuses on her attempts to [[TheAtoner atone]] -- it's difficult to be accepted as good when you represent TheSacredDarkness in a society which you yourself helped to convince that DarkIsEvil.)
* [[CreepyChild The Delightful Children From Down The Lane]] in ''WesternAnimation/CodenameKidsNextDoor''. [[spoiler: Formerly the members of Sector Z, they were delightfulized by Father, into what the are today.]]
** There's also Cree Lincoln, Numbuh Five's sister and once the best operative the KND had, who later became one of their worst enemies. Also counts as a BrokenPedestal and a case of CainAndAbel in Numbuh Five's case.
** In fact, the KND seems to have a problem with traitors ''a lot''. That may be the whole reason they inflict LaserGuidedAmnesia on operatives when they retire. On a positive note, [[spoiler:both Chad and Maurice were [[FakeDefector Fake Defectors]], subversions of this Trope, although in Chad's case, the revelation didn't make Numbuh One like him much.]]
* In Season 2 of ''WesternAnimation/YoungJustice'', after a TimeSkip, we have [[spoiler: Aqualad, now [[MeaningfulRename Black]] [[OverlordJr Manta]] [[LegacyCharacter II]].]] The worst part is that [[spoiler: he was ''TheLeader'' in Season 1.]] The cause of this was [[spoiler: [[LoveMakesYouEvil blaming the team for his love interest dying]]]] ''and'' [[spoiler:finding out [[LukeIAmYourFather his real father was the supervillain Black Manta.]]]] Viewers can only hope for a HeelFaceTurn.
** Later revealed that [[spoiler:he didn't really go to the dark side. He's a ReverseMole and Dick, Wally, and Artemis are in on ThePlan.]]
*** However [[spoiler: Aquagirl really did die, and he really was geniunely devastated by the reveal of his true parentage, to the point where Wally isn't totally confident Aqualad won't end up becoming this for real in the end after all, especially since he's growing a genuine bond with his father, while becoming more and more detached from the team.]]
*** "[[WhamEpisode Before the Dawn]]" reveals that [[spoiler:Blue Beetle II, Jaime Reyes,]] becomes this in Bart Allen's future and [[spoiler:apparently plays a key role in initiating the apocalypse--Jaime is the main reason Bart traveled to the past in the first place.]]
* [[spoiler: Simon Petrikov/The Ice King]] on ''WesternAnimation/AdventureTime''. As a human, he was a scholar, a loving fiance, and a ParentalSubstitute to a little girl who had been abandoned during the middle of WorldWar3. But [[spoiler: [[ArtifactOfDoom the Ice Crown]] [[TheCorrupter mentally warped him]] until he was unable to remember himself at all, leaving the insane husk that Finn and Jake know presently.]]
** {{Subverted|Trope}} with Finn who is turning into this in later seasons after loosing both Princess Bubblegum and Flame Princess and finding out that his DisappearedDad has become a bumbling old fool. But aside from all that, he's staying on the path of good.
** Billy is a fallen hero by the time Finn and Jake find him, hiding passively in his cave.
-->'''Billy:''' All my life I've beaten on evil creatures, but new evil keep popping up! Kicking their butts was a hopeless effort!
* Alpha from ''[[WesternAnimation/MenInBlack Men In Black: The Animated Series]]'' was the first head of the organization and mentored K, but then power got into his head and he went rogue.
* ''WesternAnimation/TheLegendOfKorra'' has Kuvira, the BigBad of the final season. Originally Suyin's protege who helped save Korra's father, she leaves to attempt to help stabilize and unite the weakened Earth Kingdom following the events of Zaheer's anarchist uprising. Over the next three years she rose from her position as a city's guard captain to a highly respected and [[TheDreaded feared]] public figure. Desiring to keep the Earth Kingdom safe and united, and seeing the monarchy as obsolete, she usurped the Prince and reestablished the Earth Kingdom as the Earth Empire, which she ruled with an iron fist. [[spoiler:Once Korra saved her life, she was able to make Kuvira see just how far she'd fallen from her previously noble intentions, convincing her to surrender willingly]].
* ''WesternAnimation/SuperRobotMonkeyTeamHyperforceGo'' has Mandarin. Once, he was the leader of the team, but was consumed with a desire to rule those weaker than him, eventually driving him to becoming TheDragon to the [[BigBad Skeleton King]].
* ''WesternAnimation/SouthPark'' has Heidi Turner. Originally one of the leading heroic characters in Season 20, the influence of her boyfriend [[spoiler:[[{{Jerkass}} Eric Cartman]]]] has turned her into his DistaffCounterpart by the next season. When Kyle declares he could never have any feelings for the person she has become [[HeelRealization she learns on how far she has fallen]].