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9->''"Madness is the emergency exit. You can just step outside, and close the door on all those dreadful things that happened. You can lock them away forever."''
10-->-- '''[[Characters/BatmanTheJoker The Joker]]''', ''ComicBook/TheKillingJoke''
11
12A sister trope to GoMadFromTheRevelation, Driven to Madness represents a deliberate attack upon a character's sanity and mental stability.
13
14There are many varied reasons for someone to attempt to drive another person to madness. Perhaps they seek to break the character's will in order to make them more pliable, or it may be an attempt to induce a FreakOut or FaceHeelTurn. [[RevengeByProxy They may wish to punish the character or torment them by attacking their loved ones in such a fashion]]. They may try doing so in order to have someone discredited or declared incompetent. Maybe they're [[ForTheEvulz just jerks.]]
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16Somewhat less evilly, someone may regard sanity as a prison and seek to release a character from its constraints by any means necessary.
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18The methods can vary, as well, from [[{{Gaslighting}} making them doubt their perceptions]], to the aforementioned torture, exposure to a BrownNote, or even straight-up MindRape. Some [[EldritchAbomination Eldritch Abominations]] drive men mad with their mere presence. Sometimes it can come just from going [[LudicrousSpeed really really fast]].
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20Particularly effective if the character has reason to doubt their own sanity, such as if they have recently been discharged from a mental institution or have undergone a nervous breakdown. Indeed, in such a situation, this often takes the form of a ThroughTheEyesOfMadness plot - at least at first.
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22May be an aspect of the MindGameShip if the reasons for the sanity breaking are part of the appeal.
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24Can overlap with BreakTheCutie.
25
26The subtrope, {{Gaslighting}}, is the subtle, insidious form of this. For unintended descents into madness, see SanitySlippage.
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28----
29!!Examples
30[[foldercontrol]]
31
32[[folder:Anime & Manga]]
33* ''Manga/{{Berserk}}'': [[spoiler:The horrific, torturous rape at the hands of Griffith during the Eclipse and watching nearly everyone she cared about getting gruesomely murdered by the Apostles]] has rendered Casca [[CuteMute mute]], [[TraumaInducedAmnesia amnesiac]] and [[TheOphelia insane]], effectively making her into an EmptyShell of her former self.
34* ''Manga/ChainsawMan'': After Denji defeats The Doll Woman physically, Cosmo destroys her mentally by giving her [[MySkullRunnethOver all the knowledge of the cosmos]], reducing Doll Woman and her Dolls into wayward husks [[MadnessMantra that can only say "Halloween"]].
35* ''Manga/ElfenLied'' is a disturbing example of how bullying, abuse, torture, and [[BadPeopleabuseAnimals animal cruelty]], can drive a [[TheDogBitesBack victim]] like Lucy to mass murder and genocide.
36* What Akito Sohma did to Kana in ''Manga/FruitsBasket''. After Akito blinded Hatori for asking for permission to marry Kana, Akito turned against the poor nurse and blamed her so much for Hatori's partial blindness that she went mad. It was so bad that Hatori had to [[spoiler:delete Kana's memories of their relationship.]] Ironically, [[spoiler:''Akito'' herself was driven to madness upon years of monstrous psychological abuse coming from her mother Ren. As a little kid, Akito was naive and bad-tempered but not evil; however, she completely ''snapped'' and became a massive {{Yandere}} with some of the worst issues in the whole cast.]]
37* ''Anime/FullmetalAlchemist2003'': Shou Tucker's whole career is a slow spiral that never lets up. After a lifetime in poverty, he turns his wife into a monstrous chimera to become a State Alchemist. The demands of the job eventually drive him to do the same to [[KickTheMoralityPet his beloved daughter and dog]] only for them to die, and him to perform more twisted experiments to resurrect her. His body is horribly mutated by his own alchemy, and all he succeeds in doing is making a series of lifeless shells resembling Nina. By the end he loses what's left of his mind and retreats into a fantasy where his family is still alive. [[AlasPoorVillain Even Edward, who was furious at Tucker's actions, can only pity the man.]]
38* ''Manga/JoJosBizarreAdventure'':
39** ''[[Manga/JojosBizarreAdventureBattleTendency Battle Tendency]]'': Straizo was Driven to Madness by his fear of decaying. Witnessing power as a vampire years ago, he mostly sought the "beauty and eternal youth" bit of it as he is afraid of dying as a withered old man.
40** ''[[Manga/JojosBizarreAdventureStardustCrusaders Stardust Crusaders]]'': Senator Phillips goes off the handle after being unfortunate enough to encounter DIO, experience [[TimeStandsStill the effects]] of The World, and forced to drive through a sidewalk filled with people, ramming through a lot of them in the way.
41** ''[[Manga/JojosBizarreAdventureGoldenWind Golden Wind]]'': This is [[spoiler:Diavolo]]'s final fate. [[spoiler:Upon receiving a thorough CurbStompBattle by Giorno's Gold Experience Requiem, the decisive finishing blow causes Diavolo to be subjected to a [[AndIMustScream never-ending]] ResurrectionDeathLoop, doomed to die repeatedly for eternity. After multiple deaths, he's gone fully insane as he screams at a young girl to stay away from him]].
42** ''[[Manga/JojosBizarreAdventureStoneOcean Stone Ocean]]'': In the past, [[spoiler:Weather Report]] was a kind man with a strong sense of justice. However, after [[spoiler:the Ku Klux Klan members that Pucci unwittingly hired nearly beat him to death, strung him up on a tree, and caused his girlfriend to commit suicide, Weather became enraged at the entire world enough to develop [[TheVirus Heavy Weather]], which is why Pucci stole his memories after seeing how dangerous he became]].
43* Johan of ''Manga/{{Monster}}'' is an expert at driving perfectly sane and normal people to suicide through total MoreThanMindControl. From the little that is known of his past, his own sanity was methodically attacked throughout his childhood.
44* This is the origin of Tomura Shigaraki from ''Manga/MyHeroAcademia''. [[spoiler:Years of abuse from his father, coupled by him accidentally killing his family, before killing his abusive father on purpose followed by being adopted by All For One and driven by his manipulations, drove him insane and transformed him from Tenko Shimura to Tomura.]]
45* In ''Manga/{{Naruto}}'', Tobi's talk with Sasuke about Itachi's true intentions ultimately led to Sasuke becoming AxCrazy and joining Tobi's side.
46* Eto's torture and manipulation of Kanae in ''Manga/TokyoGhoul'' was done for the purpose of destroying [[spoiler: her sanity to the point of making her devoted to her and using her as a tool]].
47[[/folder]]
48
49[[folder:Comic Books]]
50* ''ComicBook/TheAvengers'': The storyline ''The Crossing'' claimed Hank Pym's infamous mental breakdown had been deliberately caused by Immortus. ''ComicBook/AvengersForever'' retconned this out, with one of Immortus' henchmen saying that nope, Hank's breakdown had nothing to do with them.
51* ''ComicBook/{{Batman}}'':
52** Happens to [[WhiteCollarCrime Warren White]], a white-collar criminal who [[OnlySaneMan finds himself in Arkham Asylum]] in the limited series ''ComicBook/ArkhamAsylumLivingHell''. As the story progresses, Warren is continually tortured, abused and terrorized by the other inmates, until finally, he is locked inside Mr. Freeze's empty cell by an inmate trying to steal his identity, where he loses his nose, his lips, some of his fingers, and his ears to frostbite. Now a "freak" himself, Warren transforms himself into the villain The Great White Shark.
53** ''[[ComicBook/TheKillingJoke Batman: The Killing Joke]]'': In which The Joker attempts to drive Commissioner Gordon insane and fails.
54*** Unfortunately, a detective who has the misfortune of overseeing Joker being processed through to jail in Batman Confident is indeed driven to madness, turning into a cop-killing psychopath who ultimately commits suicide when he realizes how Joker turned him into a monster.
55*** Subverted with Harley Quinn, who was was insane but functional when she first met the Joker; Joker simply gave her an excuse to give up control to her crazy side. As someone put it elsewhere on the site, "the Joker might have driven her mad, but Harley was willing to car-pool."
56*** After having MadScientist Hugo Strange beaten to death, 'Boss' Rupert Thorne is visited by Strange's ghost until he eventually goes mad and is sent to Arkham Asylum.
57** Everyone who didn't die horribly from The Cobblepot Expedition ship in ''ComicBook/BatmanTheDoomThatCameToGotham'' wound up devolving into madness. Professor Cobblepot himself is seen walking around naked in the sub-zero temperatures, having become a part of a group of local penguins, while Mister Freeze is transformed into a crazed undead monster, desperately trying to free the MonsterInTheIce that did this to him.
58* ''ComicBook/TheBoys'': [[spoiler:Black Noir, the clone of Homelander,]] drove Homelander insane by mailing him photos of Homelander [[spoiler:actually Noir dressed up as Homelander]] eating babies, eating hearts, and committing violent murder-rapes. Homelander became an insane monster because he thought he was already a monster and just didn't remember it.
59* ''ComicBook/{{Diabolik}}'': Used to be part of the title character's modus operandi. He stopped doing that, but by that time [[TheDogBitesBack he had earned himself two formidable enemies in the form of one of these victims and the son of another.]]
60* ''ComicBook/HowardTheDuck'': Howard suffers a psychological breakdown after encountering with several weirdos at some point. Fortunately, he gets better with the help of Daimon Hellstrom and Dr. Avery (but not before causing a complete chaos while he is accidentally possessed by Hellstrom's demonic soul).
61* ''ComicBook/SevenSoldiers'':
62** The Sheeda take great pride in their ability to break even the noblest of people and re-form them to suit their twisted desires.
63** After life has had a good hard go at [[BreakTheCutie breaking]] Sally Sonic, Vitaman essentially forces her to debase herself and then exposes her to [[PsychoSerum Doctor Hyde's Evil Serum]] to finish the job.
64** The Terrible Time Tailor Zor briefly accomplishes this with magic, turning Zatanna into the person she would be if he had raised her instead of her father. [[spoiler: Fortunately, mad "Zorina" is enough of a brat to reverse the spell, just to annoy her "daddy".]]
65* ''ComicBook/SonicTheHedgehogArchieComics'': Dr. Eggman started suffering a massive one following having his greatest victory -- defeating Sonic, capturing just about everyone and turning Knothole Kingdom into a crater -- swiped from him. He would ultimately snap after one last victory by Sonic pushed him over the edge.
66* ''ComicBook/SpiderMan'': Incidentally, Spider-Man is very good at this even if he doesn't entirely mean to do it.
67** ComicBook/KravenTheHunter was so confounded by Spider-Man's humiliating defeats that he went nuts and eventually committed suicide.
68** Electro started off as a typical {{Jerkass}} criminal but years of verbal and physical torment had enough of a toll that he is now relegated to asking his mutant girlfriend to shapeshift into Spidey during sex so he could feel in control.
69** While ComicBook/DoctorOctopus was driven insane by the accident that turned him into a villain, it has been noted that Spider-Man's constant taunts and beatings drove him farther over the edge. Also, in two separate incidents, he was mentally scarred after pissing Spider-Man off. One of those times involved Spidey ripping his mechanical arms off.
70** The Chameleon was '''frightened into a coma''' when he unknowingly built robot duplicates of Peter Parker's dead parents. It ended up being a case of BewareTheNiceOnes.
71** Titania of ComicBook/SheHulk fame first fought Spidey back in ''ComicBook/SecretWars1984'' and instantly acquired a deep fear of Spidey and spiders in general due to the beating/embarrassment she received.
72** ComicBook/NormanOsborn, like Dr. Octopus, was also already crazy when he first went up against the wall-crawler but after his first defeat, he essentially dedicated his entire life to ruining Peter's. In fact, since he was behind ''ComicBook/TheCloneSaga'', it was an inverted case since it mentally broke Peter Parker for about a year or two.
73** Several of Spidey's foes have attempted to pull this on him, including Mysterio, Chameleon, ComicBook/NormanOsborn, and even ComicBook/CaptainAmerica's foe Dr. Faustus.
74* ''ComicBook/{{Superman}}'':
75** Hank Henshaw, better known as the Cyborg Superman, was once a normal scientist until an accident changed him. He watched his friends die, his body disintegrate and, when he had built a robot body for himself, watched his wife commit suicide. When he escaped using a small rocket, he drove himself mad through the incredible loneliness, reasoning to himself that he didn't leave Earth because he was a threat, he was driven off by Superman because he (Superman) was ''jealous''.
76** In ''ComicBook/LegionOfSuperHeroes'' story ''ComicBook/TheGreatDarknessSaga'', ComicBook/{{Darkseid}} brainwashed the whole Daxamite population into serving him. Darkseid's mind-control was eventually broken, but Ol-Vir remained fanatically devoted to the Lord of Apokolips even after the rest of his race was restored to sanity.
77** ''ComicBook/EmperorJoker'': This is the Joker's objective towards both Batman and Superman after gaining godlike powers from Mr. Mxyzptlk. He basically succeeded with his arch-foe, torturing Bats to death and reviving him each day to do it over again. Supes is half-way there when the comic starts, hunted down as a dangerous criminal by Bizarro each day when he discovers that the now all-powerful Joker is responsible for turning the world into a dark parody of itself.
78** ''ComicBook/TheStrangeRevengeOfLenaLuthor''. Sam, a crook who had been put in jail by Lena Colby's deceased husband, decides to take revenge on Jeff Colby by paying a gang to gaslight his widow until driving her crazy.
79* ''ComicBook/VForVendetta'': V kills every Norsefire employee who'd once worked at the concentration camp where he'd been imprisoned. Every employee, that is, except for Lewis Prothero, who as the camp commander had selected him, among other prisoners, to be subjects of medical experimentation. Because said experimentation drove V mad, [[PayEvilUntoEvil he drives Prothero mad]] by kidnapping him, sticking him in a replica of the camp, and cremating his beloved rare doll collection before his eyes.
80* ''ComicBook/WonderWoman'' [[ComicBook/WonderWoman1942 Vol 1]]: Deborah "Debbie" Domaine was forced into the role of the second ComicBook/{{Cheetah}} by Kobra, and eventually went mad due to their control and manipulations of her life.
81[[/folder]]
82
83[[folder:Fan Works]]
84* In ''Fanfic/ChildOfTheStorm'', Gravemoss is driven mad (well, ''madder'') thanks to long term exposure to [[ArtefactOfDoom the Darkhold.]] EvilIsNotAToy.
85** In the sequel, ''Ghosts of the Past'', Harry is finally driven to the brink of insanity after a ''brutal'' TraumaCongaLine at the hands of the Red Room, who [[spoiler: tortured him and turned his BlankSlate body into the new and improved version of the Winter Soldier.]] The result? He becomes [[spoiler: the Dark Phoenix,]] and is only ''barely'' talked down.
86* This is Maya Lottie's modus operandi in the ''WesternAnimation/TheLoudHouse'' fanfic ''Fanfic/{{Revival}}''. Granted as an avatar of the Outer God Nyarlathotep who loves driving humanity to insanity, it makes sense.
87* At the beginning of ''Fanfic/TalesOfTheEmperasque'', Corvus has been driven to gibbering madness by ten thousand years of trying to find his way out of Fulgrim's ever-changing maze designed specifically to break Ravenlord's sanity.
88* In ''[[Fanfic/{{Their Midnight Revels}} Their Midnight Revels]] While Ariel and Miranda state that Edith and Thomas were mentally ill before they arrived and would have gotten worse if they had not arrived the Downton Duo show signs of being driven there also by their involvement with magic. Both are exhausted from dancing all night and have the urge to continue dancing. They have heightened senses and their brains are overwhelmed by the clairvoyant abilities that they receive. They also have stronger emotions such as rage against their friends and family, and sexuality particularly when Edith attempts to seduce the housemaid, Emily.
89* In ''FanFic/NeonGenesisEvangelionGenocide'', [[spoiler:The Emerald Tablet, [[AIIsACrapshoot an malevolent A.I.]],]] uses the mental link Asuka has with Unit-02 in an attempt to gradually grind down her sanity by subjecting to constantly low-key mental stress, meant to bring out her BloodKnight urges and her inner fears and insecurities. It eventually starts affecting her by giving her increasingly vivid nightmares, bouts of extreme nausea, and culminates in [[spoiler:her viciously attacking Unit-08 and gravely injuring [[NewMeat Keiko]] in the process]].
90[[/folder]]
91
92[[folder:Films -- Animated]]
93* ''WesternAnimation/TheTwelveTasksOfAsterix'':
94** The titular hero and his friend are sent to "The Place That Sends You Mad", a building from which they are to receive a certain form - alas, within the building lies a ''ferociously'' [[ObstructiveBureaucrat obstructive bureaucracy]]. So obstructive, in fact, that it briefly pushes Obelix over the edge. Fortunately, Asterix manages to turn the situation around, driving the bureaucrats mad instead - and allowing him to get the form in the process.
95** Earlier in the film, Asterix also manages to cause a hypnotist to turn his power back onto himself, causing the poor man to believe himself a wild boar. Iris may be a poor man, but it's a funny moment.
96--->'''Iris''': ''(eyes glowing)'' By Osiris and by Apis, ''look at me''...\
97'''Asterix''': Can you light those up one at a time?\
98'''Iris''': Wha--be quiet! Now, by Osiris and by Apis, look into my eyes...\
99'''Asterix''': Can you use them for reading in bed?
100* In ''WesternAnimation/DeadSpaceDownfall,'' Hanson finally loses it after being nearly EatenAlive by a pack of Swarmers and then being attacked by a Lurker not 10 seconds later. He was screaming from stress and fear before the fight, but this is what finally pushes him into [[LaughingMad giggling]] [[AxCrazy psychopath]] territory, opening him fully to the Marker's MindRape.
101* The Penguins are approaching this at the start of ''WesternAnimation/PenguinsOfMadagascar'' from the rest of the circus playing their Afro Circus/I Like to Move it mashup at the end of ''[[WesternAnimation/{{Madagascar}} Madagascar 3]]''.
102[[/folder]]
103
104[[folder:Films -- Live-Action]]
105* By the end of ''Film/AsylumBlackout'', this seems to have happened to [[spoiler:George]] due to the events of the blackout.
106* The Skeksis render their captives near-mindless servants and steal their living essence by exposing them to ''Film/TheDarkCrystal''.
107* ''Film/TheDarkKnightTrilogy'':
108** In ''Film/BatmanBegins'', the Scarecrow uses his fear toxin to drive people insane -- and then he gets a dose himself.
109** In the sequel, ''Film/TheDarkKnight'', the Joker attempts to turn Harvey Dent insane to prove that no one is incorruptible. [[spoiler:He succeeds.]]
110** ''Film/TheDarkKnightRises'': Bane destroys Batman's city via anarchy, threatens to trigger a nuke in its heart, fractures his spine, and leaves him stranded in the middle of the world's largest dry well which only one child has escaped via climbing. By the end, Batman is shown psychologically broken enough to kill people -- starting with Bane -- by firing explosive rounds via Bat-Jet to Talia's face.
111* ''Film/FullMetalJacket'': Pvt. "Gomer" Pyle is targeted by [[DrillSergeantNasty Gunnery Sgt. Hartman]] because he can't keep up with the other recruits. [[FromBadToWorse It gets worse]] when [[IWillPunishYourFriendForYourFailure Gunnery Sgt. Hartman decides to punish everyone whenever Pyle messes up.]] It comes to a head when [[EtTuBrute Joker joins the other recruits in blanket party]] and Pyle actually improves in his training, but Joker becomes concerned when [[CompanionCube he starts to talk to his rifle]] and becomes more and more disconnected from reality. It all ends when [[spoiler: in their final night before deployment, Pyle recites the rifleman creed at the top of his lungs, [[TheDogBitesBack and shoots Sgt. Hartman, after Hartman delivers one more insult too many.]] [[AteHisGun Pyle then turns the rifle on himself.]]]]
112* In ''Film/{{Gaslight}}'', Gregory is using all sorts of {{Gaslighting}} methods to convince Paula she's going mad.
113* ''Film/HushHushSweetCharlotte'': Attempted semi-successfully with [[spoiler: one part {{gaslighting}}, one part drugs, and one part FakingTheDead with a StagedShooting.]]
114* ''Film/{{Hex}}'': Yi-wah, the ManipulativeBitch and FalseFriend to the protagonist, who ends up being tricked into believing her dead friend is back for revenge and is actively haunting her, and having the husband which she had an affair with killed in a gory fashion... by the final scene, she's all alone in the empty, derelict mansion, shivering in a corner and babbling all sorts of nonsense, where the film states she will remain in a state of permanent insanity for the remainder of her life.
115* In ''Film/ThePitAndThePendulum'', this is the goal of Nicholas Medina's tormentors. It [[GoneHorriblyRight goes horribly right]].
116* ''Film/TheScreamingSkull'': In which a man attempts to drive his wife insane in order to get unrestrained access to her money. It shares [[InNameOnly very little]] with the F. Marion Crawford short story of that name besides the title.
117* The main theme of ''Film/ShockCorridor'', where the hero has himself declared insane and sent to the asylum to solve a murder case. But things are going the wrong way.
118%%* The film ''Film/SleepMyLove'' with Claudette Colbert.
119* As things become gradually worse for the group in ''Film/VeryBadThings'', Boyd gradually ends up losing his sanity. At the very end of the film, [[spoiler:Laura]] suffers a complete mental breakdown and runs screaming into the middle of the street.
120* In ''Film/TheBigCube'', Lisa's stepmother Adriana forbids her from marrying her boyfriend Johnny, so she and Johnny conspire to drive Adriana insane by slipping her LSD. It works - Adriana represses all memories from the last three months, including her marriage to Lisa's father, his death, and all her interactions with Lisa, and is declared legally incompetent as a result.
121[[/folder]]
122
123[[folder:Literature]]
124* ''Literature/TheBookOfLostThings'': A common result of the Crooked Man's tortures, usually after being ForcedToWatch.
125* This is the final fate of the protagonists in Creator/AlexanderPushkin's ''The Bronze Horseman'' and ''The Queen of Spades''.
126* In Alexander Dumas’ adventure novel ''Literature/TheCountOfMonteCristo'' Monsieur de Villefort, a corrupt royal prosecutor responsible for the title character’s unjust imprisonment goes mad after his past crimes get publicly revealed and his sociopathic wife poisons herself and the rest of de Villefort’s family, including his young son. What triggers Villefort’s breakdown is the revelation of who stands behind his downfall -- a man he sent to rot in prison.
127* All the Outer Gods of the Franchise/CthulhuMythos can drive one insane, but Nyarlathotep is apparently the only one who seeks to do so ForTheEvulz.
128** Arguable. Outside of his eponymous short story, Nyarlathotep doesn't just randomly harass anybody. In the ''Haunter of the Dark'' he seeks to kill his summoner, because he didn't provide an appropriate sacrifice, in ''The Dreams in the Witch-House'' he just played a role as a guardian to the secrets beyond human ken who receives sacrificial tribute in return of allowing individuals to cross that veil, and in the ''Dream-Quest of Unknown Kadath'' he is seeking retribution against Randolph Carter for trying to see Earth's god's he had sworn to protect (and dominate) for unknown purposes, and [[DidWeJustHaveTeaWithCthulhu is content to have a nice chat over a cup of tea]].
129* ''Literature/HarryPotter'':
130** Neville Longbottom's parents, Frank and Alice, were tortured into insanity right after Voldemort's first fall by a group of Death Eaters. They've been institutionalized in St. Mungo's ever since.
131** Ariana Dumbledore went mad when some {{Muggle}} boys attacked her (it's never specified in what way but it's implied to not be pretty) after they caught her doing magic. She was playing outside and couldn't do the trick for them again. Her family kept what happened to her a secret so the Ministry wouldn't institutionalize her because she posed a risk to the International Statue of Secrecy as she couldn't control her magic anymore.
132* Norwegian author ''Creator/IngeborgReflingHagen'' had this as a common trait in her early production. Most of her main characters were either Driven To Madness, DrivenToSuicide ''or both''!
133* In ''[[Literature/LineOfDelirium Emperors of Illusions]]'', this is the goal of the protagonists, as far as TheEmperor is concerned. They have nothing against him personally (except for Kay, whose home planet was destroyed at the Emperor's order), but [[spoiler:a CorruptCorporateExecutive thinks that the Emperor created this universe and wishes to pay him back for that by destroying humankind]], so they decide to get rid of the Emperor. However, since ResurrectiveImmortality exists in this universe, the Emperor cannot be killed permanently. Their plan is to cause him to lose his mind in a way that is irreversible. [[spoiler:It nearly works, but the final trigger phrase fails because the Emperor is not the creator of the world, resulting in an Empire-wide manhunt for the conspirators]].
134* In a somewhat unknown Swedish novel, ''Literature/SimonsFamily'' by Marianne Freddriksson, the Jewish character Isak is training at a boot camp. His squadron leader tries to break the spirit of him by being his antisemitic self. Isak begins to go numb almost to the point of no return.
135* ''Literature/WordsOfRadiance'' (second book of ''Literature/TheStormlightArchive''): Szeth, the Assassin in White, finally loses his long battle with his own insanity by the end of this book. The realization that [[spoiler:his servitude--and the resulting slaughters he created--were completely avoidable sends him screaming over the edge.]]
136-->'''Szeth:''' THEY TOLD ME I WAS TRUTHLESS!
137[[/folder]]
138
139[[folder:Live-Action TV]]
140* In ''Series/BuffyTheVampireSlayer'', Angelus does this to Drusilla before turning her into a vampire.
141* Averted in the SciFi miniseries ''Series/ChildrenOfDune'' when one of the Cast-out attempts to drive Leto Atreides II insane with too much spice consumption. Rather than going insane, he becomes completely immune to the effects of spice and gains some superpowers into the bargain.
142* This is what the main character of ''Film/TheCube'' has to contend with for the teleplay's entire duration.
143* In ''Series/DoctorWho'', [[spoiler:Rassilon]] drove the Master to madness by implanting the never-ending sound of war drums in his mind when he stared into the Time Vortex as a child. The Master's last words before one apparent Final Death (it didn't stick) to the Doctor was him asking whether the drumming would finally end.
144** In the Series 9 finale three-parter, the Twelfth Doctor is driven to madness by a TraumaCongaLine: betrayal and capture by both [[spoiler:Ashildr and the Time Lords]], his companion Clara being [[spoiler:KilledOffForReal]], and ColdBloodedTorture at the hands of the latter betrayer, with absolutely no one around to help him through his agony. The result is that he becomes a WoobieDestroyerOfWorlds who almost destroys ''Time itself'' in the pursuit of a TragicDream. He is ultimately pulled back across the DespairEventHorizon, but must endure the losses of [[spoiler: his homeworld and people (for now), possibly his confidante Ohila, Clara ''and'' his key personal/emotional memories of her]] in the process of returning to his best self.
145* [[Series/{{Firefly}} River Tam]] is driven mad by the government and the knowledge she learns from the officials who come to see her.
146** Not to mention the show's Reavers, who will occasionally keep one victim alive and force said victim to watch their shipmates be raped to death, skinned and eaten. The survivor will ultimately go mad from the experience and will only cope by becoming a Reaver themselves.
147* Dr. Prospect does this to Daido Katsumi in ''[[Series/KamenRiderDouble W Returns: Eternal]]'' by [[spoiler:slaughtering the entire village he was trying to save and then rubbing salt in the wound by explaining how this happened because [[NiceJobBreakingItHero NEVER took them out of the village in the first place]]. Katsumi ''snaps'' completely as a result.]]
148* In ''Series/MyNameIsEarl'', the episode "Crazy Witch Lady" has the titular Lady driven to madness by the citizens of Camden treating her like an evil witch. It is implied she was just a regular quirky [[EccentricTownsfolk Camden resident]] before this.
149* In ''Series/ThePrisoner1967'', Number 6 goes to work on the Number 2 of the week in "Hammer Into Anvil". (Arguably, breaking Number 6' sanity is the point behind the whole series.)
150* ''Franchise/StarTrek'':
151** ''Series/StarTrekTheOriginalSeries'':
152*** In "[[Recap/StarTrekS2E6TheDoomsdayMachine The Doomsday Machine]]" SoleSurvivor Commodore Matthew Decker is driven mad by the experience of losing his crew and command, and harbors a death wish for having sent the men and women under his command to their deaths. Stopped from wrecking the ''Enterprise'' in an attempt to destroy the Planet Killer, Decker [[DrivenToSuicide decides]] that his death is the only way he can atone for killing his crew, and rams a shuttlecraft down the Planet Killer's maw.
153*** Then in "[[Recap/StarTrekS2E23TheOmegaGlory The Omega Glory]]" Captain Tracey goes insane after losing his entire crew to the Omega IV virus, making him another SoleSurvivor. Matters are not helped by Tracey thinking he's found a fountain of youth on the planet and using his technology to aide the Kohm in their war against the Yangs.
154** ''Series/StarTrekDeepSpaceNine'' has this happen to Gul Dukat after he witnesses [[OutlivingOnesOffspring the death of his daughter]], at the climax of a long string of personal and career setbacks. His redeeming features and likable character traits had been submerged by his arrogance and ruthless ambition many episodes previously, but [[AlasPoorVillain it's hard not to pity him]] as he cradles her corpse and mumbles to her in a broken monotone. Dukat eventually comes out of his VillainousBSOD, but becomes steadily more unhinged and [[TheUnfettered even more dangerous for it]], even before he becomes the Bajoran religious equivalent of a DarkMessiah.
155[[/folder]]
156
157[[folder:Radio]]
158* ''Radio/OurMissBrooks'': "The School Board Psychologist" sees [[ExactlyWhatItSaysOnTheTin the Head of the Board, Mr. Stone, appoint a psychologist to examine the faculty of Madison High School.]] He's given the broad authority to fire any faculty who he believes is unfit for the teaching profession. The psychologist is already overworked, and is provably unfit to make recommendations (he suggests, for example, Mr. Boynton should be an exterminator). Miss Brooks, Mr. Boynton, Walter Denton, and eventually Mr. Conklin himself gaslight the psychologist until he withdraws his recommendations and takes his much needed rest.
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160
161[[folder:Tabletop Games]]
162* In ''TabletopGame/DungeonsAndDragons'' 5th edition, the mere presence of a [[DemonLordsAndArchdevils demon lord]] can drive nearby creatures mad. What form that madness takes depends on the demon lord in question: the two-headed Demogorgon might drive people into violent paranoia, for instance, while the vicious Yeenoghu might instill cannibalistic urges into his victims.
163* The Black Spiral Dancers of ''TabletopGame/WerewolfTheApocalypse'' force their captives to walk the Black Spiral and go as mad as they have.
164[[/folder]]
165
166[[folder:Theater]]
167* In Creator/{{Euripides}}'s tragedy, ''Theatre/{{Bacchae}}'', the [[Myth/ClassicalMythology god Dionysus]] drives his aunts -- and many of the women of Thebes -- mad because they dishonored his mother and refused to acknowledge his divinity. The play ends with [[DownerEnding tragic results]].
168* In the play ''Gaslight'' (and the two film versions of the play), the husband plays tricks on his wife in order to convince her she's going crazy. It became a TropeNamer.
169%%(ZCE)* ''Theatre/AStreetcarNamedDesire'': Stanley to Blanche.
170[[/folder]]
171
172[[folder:Video Games]]
173* ''VideoGame/ANNOMutationem'': At The Consortium's research facility, a large red sphere of corrupted energy broke loose and caused the surrounding researchers who were consumed by it to lose all sanity.
174* ''VideoGame/ClockTower1995'': The birth of the twins triggered Mary's obsession with black magic and the occult, leading to her sacrificing people for the human flesh her babies needed to survive.
175* ''VideoGame/DarkestDungeon'': This is one of two ways that the enemies can kill your party (the other being relentless murder). The entire dungeon is one big stress-fest, with critical hits that crush morale and enemy attacks solely dedicated to freaking your party out. If they reach the breaking point, they go insane. If they reach the breaking point twice, they'll havea heart attack and be immediately dropped to [[LastChanceHitPoint Death's Door]], or if they already were, they'll die instantly with NoSavingThrow. Good news is, there is a tiny chance that the heroes can [[HeroicSecondWind find clarity in the eye of the storm]], effectively making them even better than normal, but even that can be stripped away with enough stress.
176* In ''Franchise/TheElderScrolls'' series, finding inventive ways to drive people to complete madness is within the realm of Sheogorath, the [[OurGodsAreDifferent Daedric Prince]] of [[MadGod Madness]]. He even considers it ''[[MadHatter a blessing]]'':
177--> '''Sheogorath:''' Madness is a bitter mercy, perhaps, but a mercy nonetheless. It is better to be seen as mad than hopelessly despondent.
178* In ''VideoGame/{{Ib}}'', the [[CreepyDoll blue dolls]] are capable of driving people insane. Late in the game they attempt to do this to [[spoiler: Garry]] and if they succeed the damage may be [[GetAHoldOfYourselfMan temporary]]..or [[DownerEnding permament]], all depending on your [[MultipleEndings previous actions]].
179* ''VideoGame/LightningReturnsFinalFantasyXIII'': [[spoiler:Before his physical torment]], Hope was mentally tormented for '''centuries''' [[spoiler:by Bhunivelze, who created an illusionary Lightning to drive him mad]], to the point he couldn't tell the difference between reality and fantasy.
180* ''VideoGame/MarkOfTheNinja'': The fate of those who wind up marked by the tattoos, leading to them committing suicide in order to avoid becoming a danger to their clan. This practice was put into place after Tetsuji, the clan's founder, wound up obtaining tattoos of his own to restore his youth and went on a madness-fueled rampage. [[spoiler:The Ninja begins to have this happen to him as well as the game progresses. If he chooses to kill Azai in the ending, he passes the point of no return]].
181* In ''VideoGame/MiddleEarthShadowOfWar'', players can actually [[VideoGameCrueltyPotential do this to their enemies]] with the use of their "[[MindRape shaming]]" ability which makes orcs drop in level and if used enough times, it will make them permanently deranged. When used against [[spoiler:Brûz the Chopper]] in the story mode, he becomes a sobbing wreck that repeats his MadnessMantra endlessly, while other orcs are only capable of saying a few broken words between screaming and snarling.
182* ''VideoGame/{{Overwatch}}'': Sigma was the victim of a FreakLabAccident when attempting to learn to control the power of a black hole. The exposure to the intense gravity altered him, granting him [[GravityMaster power over gravity itself]], but fractured his mind to the point where he's barely cognizant of the world around him.
183* In ''VideoGame/SuperPaperMario'', King Croacus in Chapter 5 was driven to madness because of the trash the Cragnons threw in the water the Floro Sapiens had to drink. That caused him to abduct and brainwash the Cragnons for the sake of his people and to build a palace filled with gems. Mario and Co stopped and defeated him, prompting the Floro Sapiens to scold them by explaining what was going on. The Cragnons promised to keep the water clean, putting an end to King Croacus' madness and tyranny.
184* ''VideoGame/TheWedding'': Jack begins to become insane and mentally unstable, the longer the portal in his basement is open. Lack of sleep was part of the reason why the demons and monsters roaming his house made it easier for him to go insane. His notes also indicate that his wife apparently summoned some extra demons, specifically to terrify him, but [[UnreliableNarrator exactly how accurate that is, given Jack's mental state when writing that part]].
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187[[folder:Web Animation]]
188* ''WebAnimation/InaimateInsanity'', the character Paper was a contestant of Season 1. But then after losing a tiebreaker with Knfie, Paper was the first person eliminated, and was sent to Idiotic Island. During his long exile, Paper’s mental health was greatly affected, and as soon as he returns to the show, he develops a SplitPersonality, Evil Paper, a person who takes acts of violence.
189* [[spoiler:Enzo]] in ''[[WebAnimation/Supermarioglitchy4sSuperMario64Bloopers SMG4's Mario Bloopers]]'' episode "Birthday Freakout", after [[spoiler:Mario ruins his party by making the castle explode. Ever since then, he has been planning to assassinate Mario. This has been pushed to higher limits [[BigDamnHeroes when a Policeman arrests him]], causing him to plan {{Revenge}}.]]
190* In ''WebAnimation/RedVsBlue'' Season 11, Lopez Dos Point Oh becomes so stunned at how outrageously stupid and inept the Reds are that he hijacks a giant robot and goes on a destructive spree.
191-->'''Dos.0''': ''(Spanish Subtitles)'' [...He's insane. ''They're all insane''.]
192[[/folder]]
193
194[[folder:Web Comics]]
195* ''Webcomic/StandStillStaySilent'': The PlagueZombie monsters are trapped in an AndIMustScream combination of BodyHorror, drive to attack any non-infected living beings and a very long lifespan. Unsurprisingly, when the reader gets access to whatever is left of the post-infection individual, said individual tends to have gone insane in one way or another.
196* ''Webcomic/{{Unsounded}}'': The HorrorHunger and feeling of his flesh rotting and being eaten by maggots drove Duane to mindlessly flee his home after being raised from the dead, though he's put his mind back into a semblance of order by the time the story starts.
197-->''[[https://www.casualvillain.com/Unsounded/comic/ch08/ch08_41.html I crossed madness and staggered out the other side. But it clings, to my heels.]]''
198[[/folder]]
199
200[[folder:Web Videos]]
201* WebVideo/DavidNear: [[https://youtu.be/zpV5siBBGOA Candle Jack]] will take away anyone who says his name, and trap them before driving his captive insane, up to the extent that they'll [[EyeScream gouge their own eyes out]] once they break completely.
202--> '''Candle Jack:''' I will tie you up and rapture you away to a final resting place. There you will be driven mad with constant mental simulation! And once I break you and your mind snaps completely, you will gouge your own eyes out of the sockets!
203* [[VideoGame/HalfLife Gordon Freeman]], in ''WebVideo/FreemansMind'', starts to behave more and more erratically as time passes and things happen (not that he wasn't a bit of a CloudCuckooLander to begin with). He has a ''dead serious'' monologue about how he's probably going insane and in need of psychological assistance after it's all over.
204* WebVideo/TheNostalgiaChick is usually driven crazy by things in movies she could easily switch off.
205* The VideoGame/{{Touhou}} FanVid series WebVideo/KoishiKomeijisHeartThrobbingAdventure uses this as the prime plot driver: SOMETHING is driving all of Gensokyo insane, and the few sane people left ([[AnyoneCanDie well...sane and still living]]) have to figure out who and how to stop it.
206[[/folder]]
207
208[[folder:Western Animation]]
209* ''WesternAnimation/AmericanDad'': Stan Smith is such an idiot that he repeatedly forgets his anniversary, despite how terrifying his wife Francine gets when he does. In "American Fung", he hastily gets Francine committed to a mental hospital for a few days so he can have more time to plan. Again, Stan is such an idiot that he keeps forgetting the reason Francine was locked up, and by the day she's released, he has nothing prepared. When Stan greets Francine with a bucket of fried chicken and offers an incredibly half-assed explanation of how he did everything "for love", Francine not only states she genuinely hates Stan, but she goes insane for real and gets committed indefinitely.
210* ''WesternAnimation/{{Animaniacs}}'':
211** Accordingly, the Warner Kids almost invariably manage to do this to anyone they have adopted as their "Special Friend" (generally someone who is being a jerk to start with).
212** According to "The Warners' 65th Anniversary", Lon Borax, the in-universe creator of the Warners, apparently "went all funny in the head" after adding the Warner siblings to one of Buddy's shorts. It's unclear if it was the Warners who did it, or if it was the stress from working all into the night. Either way, he's still nuts to this very day. But according to Memlo, he heard he was recovering.
213-->'''Borax:''' WE'RE HAVING ''SOUP'' TODAY!!!
214* ''[[Franchise/AvatarTheLastAirbender Avatar]]'':
215** ''WesternAnimation/AvatarTheLastAirbender'': [[spoiler:Princess Azula, who in the span of one summer loses the fear (and love, in her own way) of her best friends, learns her father will never love her no matter what she does, loses the Fire Lord title to Zuko in an Agni Kai, and has her philosophies proven completely wrong to her. Too many blows to the psyche send Azula into a frothing madness in which she's actually developed SplitPersonalities between the manipulative and the lunatic.]]
216** The Fog of Lost Souls from ''WesternAnimation/TheLegendOfKorra'' is a prison within the Spirit World for humans. The fog bombards its occupants with images of their greatest fears and failures, slowly driving them mad over the course of decades if not centuries. [[spoiler:Zhao has been reduced to a TalkativeLoon, and Tenzin and his siblings begin to fall to the Fog's effects after only a few minutes of wandering.]]
217* In ''WesternAnimation/TheBatman'', Joker does this to Detective Bennett in a situation clearly inspired by ''ComicBook/TheKillingJoke''. Unlike his comic counterpart, this Joker actually succeeds and turns Bennett into Clayface.
218* ''WesternAnimation/{{Gargoyles}}'': In "Revelations", [[VillainOfTheWeek Mace Malone]] describes [[HellHotel The Hotel Cabal]] was developed as a torture technique to learn the secrets of people of interest. But after losing his only method of shutting down the traps, Mace himself is driven mad as he is forced to endure all manner of torture with every door he opens.
219* ''WesternAnimation/TheGrimAdventuresOfBillyAndMandy'': In "Creating Chaos", Eris attempted to have Billy as her apprentice, but his incredibly stupid and inane demands that she's forced to follow (including literally [[AGoodOldFashionedPaintWatching watching paint dry]] for hours) causes her to break down into a whimpering heap by the time he's finally ready to use her apple of chaos.
220* ''WesternAnimation/{{Kaeloo}}'': A RunningGag on the show is to have this happen to Kaeloo (the culprits usually being Stumpy and Mr. Cat), and for the ResetButton to make sure that her sanity is back by the next episode.
221* Many ''WesternAnimation/LooneyTunes'' characters end up doing this to their antagonists -- of particular note are the mice Hubie and Bertie.
222* ''WesternAnimation/MyLittlePonyFriendshipIsMagic'''s Discord favors this as a method of BreakTheCutie.
223* ''WesternAnimation/SamAndMaxFreelancePolice'': Sam and Max do this to MoralGuardian [[PunnyName Kent Standit]] in "The Glazed MacGuffin Affair". When he banned the titular snack food, Sam and Max went on a crusade to make him lift by getting him to taste one, following him everywhere he went and trying to trick him into eating one. This escalates into a cross-country chase, ending when Kent realizes he's arrived at the factory where Glazed {{MacGuffin}}s are made and snaps.
224* ''WesternAnimation/SpongebobSquarepants'', in “The Clash of Triton”, Triton was the son of Neptune. At first, Triton had interests on the mortal fish’s lives, and creating cures, but his father, disapproves of this, and pushes him into becoming a mighty god. So he resorts to one thing, exiling Triton to the Island in the Sky, after since he’s been there so many years, Triton has developed an extreme hatred to his father, and plotted vengeance upon him. Once [=SpongeBob=] and Patrick released him form his cage, Triton makes his vengeance by destroying Bikini Bottom, but after all this damage, Neptune has actually become proud of how Triton’s become, and so they bond once again.
225* ''WesternAnimation/WeBareBears'': In "Tote-Life", the bears succumb to this with their tote bag hoarding, Panda even tries to date one.
226[[/folder]]

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