History AxCrazy / VideoGames

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[[caption-width-right:350:[[SarcasmMode A clear paragon of mental stability.]]]]

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%%* ''VideoGame/SaintsRow'': (Administrivia/ZeroContextExample)
%%** Johnny Gat in ''VideoGame/SaintsRow2''.
%%** The Boss him/herself in ''VideoGame/SaintsRowTheThird''.

%%** Vanitas from ''VideoGame/KingdomHeartsBirthBySleep''. Justified given that [[spoiler:he is the pure incarnation of Ven's darkness.]]

* From the ''Franchise/{{Kirby}}'' games:
** [[spoiler:Marx]] from ''VideoGame/KirbySuperStar and Ultra''.
** And on a literal note, [[spoiler: [[TheBusCameBack Masked Dedede]]]] in ''VideoGame/KirbyTripleDeluxe''. But we can't blame him as [[spoiler: King Dedede was [[BrainwashedAndCrazy hypnotized]] by [[EvilPuppeteer Taranza]] at the start of the game.]]
* [[SociopathicHero Meria]] from ''VideoGame/KnightsInTheNightmare'' is a lovable example. She's like this in ''Roleplay/DeptHeavenApocrypha'', too.
* There are a slightly worrying number of characters exhibiting these traits in ''VideoGame/LeagueOfLegends'', ranging from demonic swords to two different {{Mad Bomber}}s to artistically inclined serial killers to murderous wolf-men, but one of the craziest has to be Kled. A [[TheNapoleon tiny, ornery Yordle]] who serves as a sort of mascot to Noxian soldiers, Kled's philosophy of life is pretty simple: Kill everyone who trespasses on his land. Also, the entire world and possibly some other stuff too is "his land". Luckily for Kled, he really enjoys killing people, plus [[HearingVoices the voices in his head keep suggesting it]], plus there's [[ImAHumanitarian good eatin' for either him or his pet lizard]] on some of those enemy champions, so he is absolutely fine with it.

** Majora from ''[[VideoGame/TheLegendOfZeldaMajorasMask Majora's Mask]]''. Unlike most of the other villains in the franchise, its main motivation for killing/tormenting/etc. its victims is for sheer fun and tries to take it to its logical extreme by crashing the Moon into Termina.
** Zant from ''[[VideoGame/TheLegendOfZeldaTwilightPrincess Twilight Princess]]'', as shown with him killing the queen of the Zoras, [[spoiler: enslaving the Twili against their will]], and his [[NightmareFuel/TheLegendOfZeldaTwilightPrincess unnerving confrontation]] with Link and Midna at Lake Hylia, where he tries to kill the latter. [[spoiler: By the end of the game, the craziness fully manifests itself as he's reduced to a screaming, maniacal wreck.]]
** Ghirahim from ''[[VideoGame/TheLegendOfZeldaSkywardSword Skyward Sword]]''. He has unabashed bloodlust, first promising to beat Link within an inch of his life, then burn him alive, and then finally torture him until he's deafened by his own screams. [[FridgeBrilliance Makes perfect sense when you find out]] [[spoiler: he's actually a LivingWeapon.]]
* Material-L, Fate's EvilTwin from ''[[VideoGame/MagicalGirlLyricalNanohaAsPortable Magical Girl Lyrical Nanoha A's: The Battle of Aces]]''.
* From ''[[VideoGame/RiseOfTheKasai The Mark of Kri]]'' we have Tati. This deserves special mention because her older brother [[ProudWarriorRaceGuy Rau]] is the one with the ax, but he's remarkably calm and level headed. And he never speaks in anything except battle cries. [[spoiler: Unless Tati turns to TheDarkSide, in which he will utter her name once before Tati and the forces of darkness slaughter him.]] Tati, on the other hand, is ''very'' vocal and has moments of exceeding maliciousness. The way she slaughters single enemies with her knives looks more painful than anything Rau does with his ax, and considering the body count Rau racks up with it, that's saying something.
* In the ''[[VideoGame/MarySkelterNightmares Mary Skelter]]'' [[VideoGame/MarySkelterNightmares franchise]], any Blood Maidens that fall into Blood Skelter start qualifying for this ''[[ExaggeratedTrope and then some]]'' on the spot. It doesn't matter how they are normally: once they fall into the state, they immediately become [[TheBerserker raving berserkers]] that can't even communicate with others outside of LaughingMad and the occasional pained screaming. Yes, that includes what are normally the absolute nicest ones, so poor Sleeping Beauty doesn't escape this possibility at all.
** Hell, as ''Mary Skelter 2'' revealed, even resident NiceGuy Jack isn't immune to falling into this trope because guess what? He has his own pseudo-Blood Skelter known as "Ripper Jack" (yes, the Jack the Ripper parallel is for a damn good reason), which causes him to go from illegally nice NonActionGuy status to beating down on both enemies and allies with an ''extremely'' unnerving SlasherSmile decorating his face. [[spoiler:Even if we only see the smile on his Marchen mimic.]]
** Also in ''Mary Skelter 2'', we have the Mysterious Nightmare, a monster that is only capable of thinking of killing everything in sight.[[spoiler:.. with the exception of Jack.]]
* [[SuperSoldier Jack]] from ''VideoGame/MassEffect2''. She gets much better in ''VideoGame/MassEffect3''.
* In the first ''VideoGame/MechWarrior'', you can get pilots to help you in your group, each comes with a picture and a quote along with their stats before you hire them. One of them is Killer, wearing a ski mask, with the quote "I want to burn villages and eat dead, burnt bodies, kill, kill, kill!"
** The quote is from the 1969 movie Alice's Restaurant. Arlo Guthrie's character acts like he's crazy in order to get out of military service. But despite his best efforts he seems to be sane enough for them.
** He gets an homage in ''[=MechWarrior=] 2: Mercenaries'' in the form of Jake "Killer" Ives, a cheerful psychopath who was also a cheap, effective pilot, noted in his hiring profile to be a sadist bar none, with HumongousMecha as his tool of choice for hurting other people.

*** Omega is a mechanical embodiment of this trope. His sole purpose is simply to kill. His bloodthirsty nature rivals even a Khorne Berserker. Who may actually be Zero's SuperpoweredEvilSide and/or EvilCounterpart inhabiting a separate body. Worse than that, he's [[spoiler:''exactly'' what [[BigBad Dr. Wily]] had intended the ''real Zero'' to be]]. In fact, [[spoiler:Zero is ''indeed'' Ax Crazy, before his HeelFaceTurn]].

** Vile from ''VideoGame/MegaManX''. Similar to Galvatron, an accident regarding his brain led to him developing a disturbing relish in not only terminating Mavericks but also causing as much collateral damage as he can while destroying the maverick in question. He also has a sociopathic hatred of X, and he revolts against authority namely to cause destruction.

** Sundowner, Mistral and [[spoiler:Raiden himself]] in ''VideoGame/MetalGearRisingRevengeance''. Sundowner is a war-loving murderous sociopath who uses scissor swords, Mistral [[PayEvilUntoEvil butchered the murderers of her parents]] and [[spoiler:arranged for Khamsin's death simply because she found him annoying]], and as for [[spoiler:Raiden, it's revealed that he always was somewhat AxCrazy ever since he was a child soldier, but only after a Breaking Speech by Monsoon does his darker side resurface]].
* In ''VideoGame/MogekoCastle'', several people could qualify for this.
** The Mogekos are desperate to have sex with Yonaka, against her consent, and are willing to go to extreme lengths to do so, with one Mogeko willing to blow up the entire castle and find her corpse and bang that.

* ''Franchise/MortalKombat'' has a few characters known for being lunatics. Not counting brainwashed victims and near-mindless beasts, the ones that stand out most are Baraka, Mileena, and [[TheCaligula Shao Kahn.]]
** Probably Skarlet too. Never mind the fact that what she does to her opponent is violent even by the standards of this game (sort of justified, as her powers are supposedly derived from absorbing the blood of others) she seems so incredibly unstable that Shao Kahn had to keep her in chains when he didn't need her to fight or kill someone. (And ''despite'' that, she still showed UndyingLoyalty to him; of course, she was one of his evil creations from the Flesh Pits, like Mileena, who also was incredibly loyal.)
* If you want an example of a nutcase in ANY racing game ''ever'', ''VideoGame/NeedForSpeedMostWanted'' introduces [[TheFreelanceShameSquad Blacklist]] member [[BitchAlert Kira]] (Kamikaze or "Kaze") [[JapaneseDelinquent Nakazato]] whose [[DrivesLikeCrazy driving style is straight up aggressive and borderline near-suicidal]] and isn't afraid to dent her car as long as she can take out the competition. Especially '''[[PlayerCharacter YOU]]'''.
* ''VisualNovel/NineHoursNinePersonsNineDoors'' has [[spoiler:Clover in the "Axe" ending chopping up Santa, Seven, June, and Junpei, over her brother's death]].
** The [[VisualNovel/VirtuesLastReward sequel]] invokes this again [[spoiler: by making it look as if Clover killed Luna in a rage. Subverted, though, as it was an accident.]]
* Many of the bosses in ''VideoGame/NoMoreHeroes'', and more so in its sequel. Special mention goes to Bad Girl, who bats blindfolded gimps at you and beats you with a burning baseball bat, the insane superhero Destroyman, the [[GirlishPigtails pig-tail wearing]] {{Yandere}} Kimmy Howell, the damned soul of Matt Helms, and Jasper Batt Jr. after taking some PsychoSerum. In fact, most of the remaining assassins come off as {{Retired Monster}}s who got BoredWithInsanity.
* ''VideoGame/{{OFF}}'' has both Japhet, who's been driven from perhaps the nicest guardian to a lunatic whose policy became "worship me or die" after a couple years of [[DudeWheresMyRespect thanklessness]], and any Elsen that's been deprived of their sugar for enough time, who will assault even the spectres if they dare be in the same room.
* Kurodōji from ''VideoGame/{{Onmyoji}}'' who [[LaughingMad laughs nonstop]] [[PutTheLaughterInSlaughter as he kills]]. All while being [[CreepyChild a little boy]].

* The [[PlayingWithFire pyromaniac]] Tatsuya Sudou in ''VideoGame/Persona2''. A [[HearingVoices schizophrenic]], psychotic SerialKiller, with his own RoomFullOfCrazy.
* ''VisualNovel/PhoenixWrightAceAttorneySpiritOfJustice'': Typically in ''Franchise/AceAttorney'', the murderers in each case are not examples of this trope as they usually only murder once or twice at most[[note]]Even [[spoiler:Dahlia]], who had planned to kill up to five people, was not blatantly out for blood. It was their way of covering for other crimes [[spoiler: and her final attempt was to spite Mia]].[[/note]] and tend to have motives for their crimes (even if they are petty or selfish). Even when {{Professional Killer}}s with high body counts are involved, they remain [[ConsummateProfessional professional]] and only kill when necessary or when ordered to do so. This game's BigBad, [[spoiler:[[GodSaveUsFromTheQueen Queen]] Ga'ran Sigatar Khura'in]], is the most openly bloodthirsty culprit in the franchise. [[spoiler: In addition to being an insane megalomaniac, she seems to revel in having executions, specifically [[OffWithHisHead beheadings]]. She also shows no qualms about calling for the genocide of defense attorney within general the country of Khura'in.]] While this person is able to hide this under their [[FauxAffablyEvil polite and serene]] [[spoiler: regal]] exterior, the gloves are off during the final case with the extent of their madness put on full display. [[spoiler: Not only does she act more hostile as a prosecutor and openly threaten to have Phoenix and Apollo beheaded ''on the defense bench'', she even ''[[ScrewTheRulesIMakeThem rewrites rules mid-trial]]'' to make it easier for them to slip up and do something that will allow her to call for their executions quicker once they point the finger at her.]]
* Ignus, a fire mage, from ''VideoGame/PlanescapeTorment'', who nearly burned down the city of Sigil before being stopped, can join your party. Ravel Puzzlewell, who almost destroyed the city of Sigil before the Lady intervened, is connected with your character. The Xaosects/Chaosmen, represented mainly by the insane Starved Dogs Barking thugs, prowl The Hive (though you can speak to one, Barking-Wilder, and turn him briefly sane). Acaste, the Ghoul Queen, hungers for flesh, though that's pretty standard procedure for a ghoul. One of your ''own'' past incarnations was quite ax crazy and damn near impossible to kill, to boot. You can use a fossilized arm of his as a weapon.
* [=GLaDOS=] from ''VideoGame/{{Portal}}'' is less ax crazy than she is coldly and calculatedly crazy, but it ends up having the same net effect on the people she murders. Supplemental material for ''VideoGame/{{Portal 2}}'' indicates that, at first, the researchers were only able to turn her on for a few fractions of a picosecond before she tried to kill everyone. So, calculated murder is actually an improvement.
--> [[AC:"It was a {{morality c|hip}}ore they installed after I flooded the Enrichment Center with a [[DeadlyGas deadly neurotoxin]], to make me stop [[DepartmentOfRedundancyDepartment flooding the Enrichment Center with a deadly neurotoxin.]]"]]
* The Dude from ''VideoGame/{{Postal}}'', full stop.

* Aran Ryan from the Wii version of ''VideoGame/PunchOut'' Most of the other characters emit grunts of pain or anger when you've landed a massive combo on them. Him? ''Deranged laughter''.
** In between rounds, he shouts to Mac, "Keep hitting me! ''I love it!!''" Then, when he gets back in the ring, he punches himself several times, then makes an insane smile at the camera. His fighting style involves him running around the ring and attacking from the side, as well as jumping off the wires and trying to punch. This guy was perfectly normal in his first appearance.
*** "Your wimpy little punches won't even faze me." There's taking a hit and then there's getting your jollies from it.
** Bald Bull from the same game gives a similar impression, both in that before matches he'll beat himself over the head for no apparent reason, and the way in which he rises from a knockdown in Title Defense mode is downright terrifying.

** Brian Irons, introduced in ''VideoGame/ResidentEvil2'' as the Chief of the Raccoon City Police Department, is a murderously psychotic individual. He hunts down and kills his fellow RPD officers following the T-virus outbreak, has a history of both raping and murdering young women dating back to his college days, accepts bribes from Umbrella Corporation in exchange for turning a blind eye to their unethical experiments, and is last seen preparing to ''taxidermy a human corpse'' before his gruesome death at the hands of G. The 2019 remake adds another layer to his depravity - he is revealed to have murdered an ''entire orphanage'' of children on Umbrella's orders. Granted, they were thought to be infected by the T-virus, but this was because they were used by the company as human guinea pigs, with the full knowledge and financial support of Chief Irons.
** Alfred and Alexia Ashford from ''VideoGame/ResidentEvilCodeVeronica''. Exploring Rockfort Island and reading the files that have been left behind by former inmates and employees paints an unflattering picture of Alfred as a deeply unstable, sadistic lunatic who dabbles extensively in torture and human experimentation. Then you meet him in person and it only gets worse from there. It turns out, [[spoiler:he also has a split personality that takes the form of his sister Alexia, who is cryogenically frozen in Umbrella's Antarctic facility. He loves her and has devoted his entire life to the service of her, in a way that carries some decidedly... [[IncestSubtext ''dark'' undertones]].]] Alexia turns out to be even more of a crazed megalomaniac than her twin brother, and [[EvilIsHammy every bit as hammy]].
** Apart from Zoe, the Baker family from ''VideoGame/ResidentEvil7Biohazard'' are introduced as the very embodiment of this trope. They pursue Ethan around their property in a murderous rage, attacking him on sight for no discernible reason, and have been in the habit of abducting and killing people for years. It turns out that they weren't always like this; [[spoiler: their insanity is due to the E-001 bioweapon (more commonly known as "Eveline", who was given the form of a little girl) taking control over their minds. (Eveline herself technically also qualifies, but as she is, in fact, a bioweapon, this is probably by design.)]] There is one exception - their son Lucas, an accomplished inventor since childhood, was a deranged psychopath long before [[spoiler: Eveline arrived]]. As a young boy, he locked a bully in the attic and allowed him to starve to death. His shtick is constructing elaborate ''Franchise/{{Saw}}''-like traps for Baker family captives to endure. It's later revealed that he [[spoiler: was cured of Eveline's mind control by her creators, The Connections, and has been spying on his family for them ever since. They even appointed him as Lead Researcher of their Dulvey lab in 2017, a position that he would severely abuse by subjecting its test subjects (and perhaps even its scientists) to the same treatment as the aforementioned Baker family captives.]]
* ''VideoGame/SaintsRow'': Johnny Gat in ''2'', the Boss him/herself in ''3''.

* ''VideoGame/SenranKagura'' gives us Yomi, Ryōbi and Ryōna. Yomi's tendency to pretty much go ballistic on anyone who happens to be a wealthy individual, and her obsession with bean sprouts ascends levels of violent and unnerving. Ryōna on the other hand is ''much worse''. She's a CombatSadomasochist with even more emphasis on masochist. She'll likely ask random people to perform harmful acts on her just for her satisfaction. What happens if you don't? Let's just say that it won't end well for you. Finally we have Ryōbi who is an absolute sadist that gets a lot of joy out of beating down her opponents.
-->'''Ikaruga:''' Wait! You said you had to kill me to complete your mission! What is the meaning of this?\\

* ''VideoGame/{{Shadowverse}}'' gave this to Luna. [[spoiler:After reuniting with illusions of her parents, Luna repeatedly encounters and kills an illusion of the robber who took her parents' lives, and slowly begins deriving joy from it.]]
* ''Franchise/SilentHill'':
** Walter Sullivan in ''VideoGame/SilentHill4''. When you're [[spoiler:the ghost of]] a SerialKiller who's murdered around 20 people before the game even ''starts'', it comes with the territory.
** [[spoiler: Eddie]] when you meet [[spoiler: him]] for the last time in ''VideoGame/SilentHill2''.
* In ''VideoGame/SoulNomadAndTheWorldEaters'', the OmnicidalManiac Gig is a good example of this. [[spoiler: Absolutely ''everyone'' on your side is Ax-Crazy in the Demon Path.]]
* [[PlayerCharacter Captain Martin Walker]] in ''Videogame/SpecOpsTheLine'' starts out as a run-of-the-mill ActionGenreHeroGuy, but [[SanitySlippage slowly turns extremely violent]] as the game progresses. His [[MercyKill execution moves]] turn into outright ColdBloodedTorture, and the player has the option to [[spoiler:gun down a civilian camp for lynching John Lugo, your squadmate.]]
* The [[AntagonistTitle Titular]] [[VideoGame/SpookysJumpscareMansion Spooky]], despite her usual {{Jerkass}} behavior, has shown quite the deranged side. From sending dozens of people ([[BadBoss including her own employees]]) to be slaughtered by her Specimens, to having a wicked SlasherSmile after killing Santa.

** There's also Vega, initially from ''VideoGame/StreetFighterII'', who's a little more hinged than Juri in his day-to-day conduct but the fact he's a {{Narcissist}} to the point of ''murdering people for either being ugly or touching/insulting his face'' probably says a lot about his frame of mind.
* The crown king of all Ax-Crazy RPG villains is Luca Blight from ''VideoGame/SuikodenII'', hands down. Nothing is safe from his wrath...[[WouldHurtAChild not even small children]]. In fact, Luca rewrites the book on badass, as it eventually takes as many as ''eighteen'' of your party members, [[AnnoyingArrows several volleys of arrows]] (each one shown capable of immediately killing one of his soldiers), and after all this, a duel to the death with the main character to bring him down in a suitably ''epic'' ClimaxBoss battle.

** Barbatos Goetia of ''VideoGame/TalesOfDestiny 2'' had committed numerous atrocities to prove that he was the strongest warrior of all, which eventually caused him to be [[UnPerson written out of history]]. Even after his resurrection, he became so obsessed with trying to prove himself that he repeatedly attempted to [[HeroKiller kill]] ''[[HeroKiller actual]]'' [[HeroKiller heroes]] in Stahn and Rutee just to get at their son Kyle.
** The main reason Jade Curtiss from ''VideoGame/TalesOfTheAbyss'' banned replicating living creatures was that when he attempted to revive his mentor who he accidentally killed through it, the resulting clone was an ultra-powerful BonusBoss with a sociopathic personality. No wonder he was a bit apprehensive about using it again.
** Zagi from ''VideoGame/TalesOfVesperia'', who, at about 3/4 through the game seems to have no reason for wanting to kill Yuri other than that he wants to kill Yuri. His Ax-Crazy status is lampshaded by his [[MadEye one eye that's smaller than the other]], possibly because he's so insane that he can't be bothered to hold them both open. [[spoiler: In one of the boss battles against him, he casts Poison on HIMSELF!]] Most battles consist of him spouting random crap about wanting to kill Yuri.
** Judith also qualifies, especially if you're listening very carefully to her in-battle dialogue. [[LaughingMad She giggles]] when ripping apart enemies and will send enemies off with an almost evil-sounding, whispered "goodbye". She's shown to be disappointed by both the 100 and 200 Man Melees (even fellow BloodKnight Yuri was satisfied by the 200 Man Melee) and frequently voices boredom if she's either not allowed to fight a lot or if battles are too short/too easy. Even [[NervesOfSteel Yuri's]] scared of her, because he fully believes she'll allow a monster to eat her just to rip it open from the inside out. She's not quite on a level with Zagi (that is, she's not InsaneEqualsViolent), but she definitely plays this trope. People will note that Judy's not all there in the head, including your party members. She tells the others that bloodshed excites her in a skit and she loves that blood is spilled when she inflicts pain on others. She doesn't, however, think of herself as this trope (as she's pretty hurt then annoyed when asked twice by two different people if the 200 Man Melee wasn't violent enough for her) and [[spoiler: she has problems fighting members of your party when forced to]].

* Several of the playable characters from ''VideoGame/TeamFortress2'':

** And there's the ax-wielding Horseless Headless Horsemann, the NPC from the Scream Fortress update, who attempts to hunt down and behead every player he encounters.
* [[SuperpoweredEvilSide The God of War Melqart]] in ''VideoGame/TearsToTiara2'', appropriately. Also Izebel.
* In the ''Franchise/TouhouProject'' fangame ''VideoGame/KoumajouDensetsu'', [[PersonOfMassDestruction Flandre Scarlet]] is portrayed this way with a pretty twisted sense of "playing".
** And Yuuka Kazami was this in the UsefulNotes/PC98 games. Genocide was just a game to her... It's been dialed back quite a bit for the 9th game in the series... Though she is still able to worry some characters, including '''Cirno''' of all of them. And there's very little that worries that ice fairy even slightly.
** And now from WordOfGod, Kisume has been confirmed as this much to the fans' surprise. This also makes her somewhat unusual for this trope as she is also a ShrinkingViolet.
* In ''VideoGame/TownOfSalem'', most of the neutral killing roles are psychotic. The SerialKiller is described as to simply want everyone to die, the [[PyroManiac Arsonist]] wants to live to see everyone burn, and TheJuggernaut is a brute who grows more powerful with every kill. The semi-official lore paints the first two as FauxAffablyEvil.
* While [[LoadsAndLoadsOfCharacters many characters]] in the ''VideoGame/TrailsSeries'' could qualify, the biggest example is Shirley Orlando, a [[PrivateMilitaryContractor Jaeger]] and one of the most violent characters in the entire series. She's surprisingly [[DissonantSerenity friendly and cheerful]]...untill she gets a severe case of [[BloodKnight bloodlust]]. She's so violent, in fact, [[spoiler: she gets scouted as an Enforcer of Ouroboros, and she accepts,]] and her weapon is a massive sword that is [[BifurcatedWeapon also a chainsaw and a flamethrower]]. Was it mentioned she's only ''14''?
* Needles Kane the driver of Sweet Tooth in the ''VideoGame/TwistedMetal'' series, especially his ''Twisted Metal Black'' incarnation.
** The cast of ''VideoGame/TwistedMetalBlack'' is made up of delusional priests, hillbilly psychos, and doll-faced murderers. The sanest characters in the whole thing are [[BigBad Calypso]], Agent Stone, and John Doe. The last two are genuinely good and sane people, who are in it for just reasons, and were institutionalized for severe PTSD and amnesia-related conditions. Still, the fact that the BigBad is saner than most of the cast is somewhat... disturbing.
* In ''VideoGame/{{Undertale}}'', [[spoiler:the Fallen Child]], according to some people. The character is so obscenely crazy that they will try to ''attack empty space. Repeatedly.'' A complete and utter OmnicidalManiac and one of the most evil and psychotic characters ever presented in video game history, with no love or compassion for other living things. Fittingly, as the character is an abstract incarnation of [[spoiler:[[YouBastard the player's desire for power and progress even if it means killing absolutely everyone in their way]].]] However, this is only one interpretation of their personality. Other people prefer to portray them in a much more sympathetic light.
** There's two more examples. One, the sadistic Flowey the Flower, and two; YOU. Yes, YOU. The person staring at the screen pressing the buttons. Not Frisk, not [[spoiler:the Fallen Child]], nobody else. Just YOU. It is VERY possible for the entire Underground to fear you as a psychotic murderer who only wants to kill every living being. And the game is a master at making you feel very, very bad about it.

** The [[spoiler:Descendants]] in ''VideoGame/UnchartedDrakesFortune'' are basically violent, feral zombies who kill and consume anyone who sets foot on their island. [[spoiler:We have the El Dorado virus to thank for that.]]
** Subverted by [[RuthlessModernPirates Eddy Raja]] in the same game. He fires a shotgun through Nate's car window, accusing Nate of setting him up, and rants about the island being cursed, but he has genuine reason to think he's being cheated out of his share of the treasure. [[spoiler:And he's correct about the island being cursed- the above-mentioned Descendants are the ones cursing it.]]
** We're first introduced to [[BalkanBastard Zoran Lazarevic]], the BigBad of ''VideoGame/Uncharted2AmongThieves'', when he finds one of his soldiers stealing small trinkets from their camp, and his response is to [[BadBoss stab the poor sucker to death, toss his body into the swamp]], and loudly scream about being [[SurroundedByIdiots "surrounded by TRAITORS! AND FOOLS!"]] Add to that an admiration of history's worst tyrants, including Hitler himself, and Lazarevic is not the picture of perfect mental clarity.
** Talbot, the EvilBrit from ''VideoGame/Uncharted3DrakesDeception'', ends up [[VillainousBreakdown becoming this]] [[spoiler:after his employer, Katherine Marlowe, [[DragonTheirFeet dies right in front of him]].]] He tackles Nate from out of nowhere with a knife, kicking and swiping at him, and when [[CoolOldGuy Sully]] joins the fight, he tries to '''[[BoulderBludgeon beat the old man's head to a pulp with a boulder]]'''.
** Rafe Adler, the BigBad of ''VideoGame/Uncharted4AThiefsEnd'', is implied to not be all that sane, as shown at the start of the game when he stabs a corrupt prison warden to death, and later on, when he warns Sully that if he tries bidding on the local MacGuffin at a criminal auction, he'll leave the auction house "in a goddamn body bag". As his rivalry with the Drake brothers continues, he becomes increasingly more deranged, until he finally snaps and decides to [[spoiler:force Nate into a DuelToTheDeath ''when they're both locked in the hold of a pirate ship which is disturbingly close to exploding and consigning them both to a fiery death''.]]
* The Burning Blade clan in ''VideoGame/{{Warcraft}} II'' and ''VideoGame/WorldOfWarcraft'' deserve a mention, as a clan of Ax Crazies that were held in check by a large group of ogre enforcers. The Horde "was not willing to employ them except in the most extreme cases, for fear that they might turn on other clans or even each other".

--->Guns don't kill people, '''I do!''' ''[cackles insanely]''
** Though decidedly one of the less maniacal cases of insanity, it is heavily implied that the Ghosts in the ''VideoGame/StarCraft'' universe would've liquidated the universe if it weren't for the inhabiting implants in their brains.
--->Whenever I see a world untouched by war, a world of innocence, a world of lush forests and clear rivers... I really just wanna ''nuke the crap out of it''!
** The Burning Blade are puppies in comparison to the [[VillainousHarlequin Laughing]] [[PrecisionFStrike Fucking]] [[VillainousHarlequin Skull]]
* Downplayed in ''VideoGame/WolfensteinTheNewOrder''. While much of it depends on your playstyle, it's made clear that B.J Blazkowicz is this -- he's a bit ''too'' eager to go the extra mile in killing Nazis. The fact that [[ThereIsNoKillLikeOverkill he can and will dual wield virtually every weapon in-game]], he interrogated a nazi with [[ChainsawGood a chainsaw]], and he tends to stab people at the worst possible moment in cutscenes just proves it further.
** Frau Engel as well. It's apparent in the first game that in forcing B.J at gunpoint to play a "race purity" game and then passing it all off as a little joke, she's not really well upstairs. Come ''VideoGame/WolfensteinIITheNewColossus'' and she's even more unhinged as [[spoiler:she chops Caroline's head off and desecrates her dead body with childish glee.]]
** Adolf Hitler himself has become a 71-year-old DarkLordOnLifeSupport by the events of ''The New Colossus'', and his senility has taken a serious toll on his already addled mind. He's become a paranoid lunatic seemingly barely aware of reality, babbling about his mother one minute and remorselessly murdering the actors for his latest propaganda film the next.
* Both [[VideoGame/SandsOfDestruction the game]] and [[Anime/SandsOfDestruction manga]] of ''World Destruction'' has the heroine, [[NamesToRunAwayFromReallyFast Morte]], who is more than happy to blow up a city. The anime version, however, gives us the resident [[TheChick chick]] Rhi'a, who has no qualms to pull out her guns when she is pissed.
* ''VideoGame/{{Xenogears}}'' has Id, also known as [[NamesToRunAwayFromReallyFast the Demon]] [[RedBaron of Elru]]. Whenever he pops up, he goes around killing ''everything'' in sight, committing genocide, crashing a "space station" (killing all the people living inside), or just behaving like a "normal" serial killer, and murdering people one by one. [[spoiler:In reality, Id is actually [[TheHero Fei]]'s SplitPersonality. The guy has a lot of issues.]]
* Albedo from the ''VideoGame/{{Xenosaga}}'' series. The particularly disturbing "Ma-Peche" scene gives testament to this, [[spoiler:especially when he tears his own head off to prove a point about how he can not die]].
** In the Japanese version, [[spoiler: he cuts it off]], but the edited scene in the English release actually manages to be more disturbing than the original.

* Nikolai Diavolo in ''VideoGame/EverythingOrNothing''. Though he never shows this trait within the game, M reveals that even the KGB tried to kill him. To make matters worse, his mentor was the VERY ax-crazy Max Zorin.
* Snow White from ''VideoGame/FairytaleFights''.

*** Special mention goes to Vaas Montenegro, who's crazy even by everyone else's standards.
*** Buck. Not as obvious as Vaas. However, he's a brutal sadist who enjoys torture, rape and murder.

** ''VideoGame/FarCry5'':
*** The Seeds in general. John and Jacob tend to be a bit more expressive in the "Ax" department, but all four of them are violent and crazy.
*** '''The Cook''', no one else compares. He's the villain of the sidequest ''"A Dish Served Cold"'' and by far the most deranged psycho in the entire game.
* ''VideoGame/Fallout1'', owing to its post-apocalyptic setting, features quite a few nutcase out to make the Wasteland even worse of a place to live in.
** [[SuperSoldier Frank Horrigan]], from the [[VideoGame/Fallout2 second game]] is a pretty stand-out example. Serving as a killing machine to the main antagonist group of the game, the Enclave, there's always bound to be violence when he's featured in a scene. From his killing of a family to his outright genocide against the [[spoiler:Deathclaws at Vault 13]], Horrigan is so gleefully brutal that even his fellow Enclave soldiers can hardly stomach his rampages, and a whole squad worth of them will even help the PlayerCharacter fight him. Frank is also unique amongst endgame villains of the series in that he ''cannot'' be convinced to stand down through words and will fight the player and any potential allies to the death.
** [[EvilOldFolks Stanislas Braun]] from [[VideoGame/Fallout3 the third mainline game]] has crafted entire virtual realities for him and his fellow vault dwellers to inhabit. Too bad for them Braun uses said virtual realities to torment them in various ways, all the way to murder, which he can undo through his control over the simulation. Braun spent ''two centuries'' repeatedly toying with his test subjects, describing some of their most gruesome deaths with glee in his logs and only getting bored with the actual locations themselves.

** Kefka from ''VideoGame/FinalFantasyVI''. This is a man who reduced the planet to a burned-out shell [[ForTheEvulz because he could]], and then randomly took out the remaining pockets of civilization with a WaveMotionGun whenever he got bored. That's during his encounter with the Warring Triad. Beforehand, he was, while relatively normal, a man prone to [[LaughingMad breaking into fits of hysterical laughter]] when doing atrocious crimes, had brainwashed Terra and ordered her to torch fifty of his own soldiers alive, attempted to burn Figaro, poisoned Doma (and in that particular case, he also mused maniacally about his joy about listening to "music" revolving around hundreds of people screaming in unison), brutalized various Espers in the MagiTek research facility while maniacally declaring himself [[AGodAmI to be a god]], massacring various Espers at Thamasa as well as burning Thamasa to the ground.
*** His backstory reveals that he was the first Magitek Knight, but the process was imperfect, and that he became insane after the process, which is heavily implied to involve brain surgery, meaning that the Empire broke his brain.

** ''VideoGame/FireEmblemTheBlazingBlade'':
*** Karel is a rare AntiHero example of this trope. Although twenty years later in ''VideoGame/FireEmblemTheBindingBlade'', he has mellowed out quite considerably.
*** Jerme, the Black Fang assassin nicknamed Death Kite from the same game, fits this one like a glove. He says to [[ActionGirl Lyn]]: "You! Woman! You have beautiful skin. If I sliced you into lovely red ribbons with this, would the pieces be as soft and delicate as silk?"
** ''VideoGame/FireEmblemAwakening'': Gangrel truly lives up to his epithet, the "Mad King of Plegia." He's prone to fits of [[LaughingMad insane laughter]], and has a strong appetite for bloodshed, to the extent that all of the atrocities he committed were simply to [[PretextForWar start a war with Ylisse]]. After the HeroicSuicide of [[spoiler: Emmeryn, the current Exalt of Ylisse]], his subjects realize what a lunatic he is and [[HatedByAll desert him en masse]].

*** [[spoiler:Rhea/Seiros]] becomes this on the [[spoiler:Crimson Flower route. After Byleth sides with Edelgard in Chapter 11, she wants nothing more to kill Byleth and gleefully screams about how she wants to rip their heart out. By the end of the game, she is willing to burn all of Fhirdiad to the ground in order to exact her revenge (despite condemning many innocents to death in the process).]]

** General Barclyss is a psychotic nihilist with a penchant for bombarding defenseless villages and has the goal of destroying all life on the planet. While he tries to keep up a [[MaskOfSanity stoic demeanor]] during his atrocities, he's also easily provoked by setbacks to the point of slashing away at any living thing (or non-living, as shown by Palisade Prison's hallways). By the end of the game, he no longer hides his unstable nature, as shown by his insane ranting and raving about the meaning of life.
** His second-in-command, General Kail, is so addicted to killing that he treats any period of time when he's not killing as equivalent to holding his bladder. When Barclyss gives him permission to kill volunteers for their army, Kail remarks that it's been far too long since he last did anything like that. This is especially noticeable when he states he can't hold back on firing the Aquadome's cannon at Heyama a second time, despite Barclyss being knocked unconscious and unable to give him orders.
* Birdman in ''VideoGame/{{Galerians}}'' and Parano in the sequel.

* The ''VideoGame/GrandTheftAuto'' series is a CrapsackWorld full of violent and deranged criminals.
** Catalina. In ''[[VideoGame/GrandTheftAutoIII III]]'', she already shoots two of her apparent love interests, but it goes even further in [[VideoGame/GrandTheftAutoSanAndreas San Andreas]]: she has graves dug by her house, she sexually abuses CJ (and still thinks she loves him), she threatens to kill/castrate CJ, and she takes glee in killing any cops or civilians who get in her way.
** T-Bone from ''VideoGame/GrandTheftAutoSanAndreas''. He is brutally sadistic and impulsive when gets really angry. In "The Introduction" video, he gives a brutal beating of another gang member, possibly to the point of killing him, and at one point threatens to rape and kill CJ's family as a "joke."
** Tommy Vercetti from ''VideoGame/GrandTheftAutoViceCity'', is aggressive and easily angered, and has no problem killing his victims with chainsaws (not for nothing he was nicknamed "The Butcher of Hardwood"). Also one occasion he was sent by the leader of the bikers to wreak havoc in the city.
** Toni Cipriani from ''VideoGame/GrandTheftAutoLibertyCityStories''. He literally dismembered a man with an ax, only to then take his remains to a butcher's shop. Also, said remains were ''the owner's''

*** All is not well in Niko Bellic's head. This is probably the result of PTSD and grief. He has also a deep talent for carnage and always fought like a raging {{berserker}}. What would you call someone who massacres dozens of gangsters for a few dollars, all while he curses and screams, and commits dozens of acts of vigilantism for the same reason?

*** Ray Bulgarin. He's extremely impulsive, violent, aggressive, and paranoid, to the point of shooting his own sister unprovoked, possibly killing her. [[spoiler: Later, he beheads the cook who stole his diamonds and presents the disembodied head as a death threat to Luis.]]
*** [[spoiler: Dimitri Rascalov as well]], [[SanitySlippage more and more as the game progresses.]]
*** Other examples include Mikhail Faustin and psychos like Jeff Harlingford and Eddie Low.

*** Trevor Philips is, to say the least, ''completely fucking insane''. The trailer alone showed him brutalizing random people and committing wanton destruction for kicks, but that merely scratches the surface: he's completely unpredictable, extremely violent, and disturbingly easy to piss off, he's a meth addict and an alcoholic, he is heavily implied to occasionally ''[[ImAHumanitarian eat people]]''.
*** From the same game, we have Steve Haines, a showboating (literally -- he has his own TV show) FIB agent who's just a little too eager to bring the protagonists in, Peter Dreyfuss, a murderous film director who was behind the disappearance of a starlet named Leonora Johnson in the '70s, and The Altruists, a cult comprised of former baby boomers who take in "lost souls" to "purify" them.
*** Michael [=DeSanta=] himself. He's just very good at hiding it. SplitPersonality and [[UnstoppableRage anger issues]] aside, he sounds pretty psychotic during random killings.
---->'''Michael''': ''[during random killings]'' AIN'T THE AMERICAN DREAM GRAND!
* Kilgor from ''VideoGame/HeroesOfMightAndMagic III'' is Ax-Crazy even by the standards of the Barbarians. The bloodshed and destruction wrought during his campaign to become Krewlod's new king left Krewlod in a state of near ruin and starvation. His narration during the "Festival of Life" campaign and the thoughts of other characters depict him as a madman who relished slaughter. His madness ushers at the end of Enroth when he acquires the Sword of Frost and wages war on the rest of the world. Gauldoth Half-dead from ''Heroes of Might and Magic IV'' muses that the Reckoning (triggered by the Sword of Frost and Armageddon's Blade clashing) arguably did just as much good as evil since in addition to destroying Enroth it also ended Kilgor's life. In Gauldoth's opinion, Kilgor was so awful that losing the planet was an acceptable price for ending him. The Immortal Hero Tarnum blames himself for Kilgor's rise to power since his own brutal stint as the Barbarian King set a bad example for Krewlod to follow. Because of him, the people of Krewlod considered Ax Craziness a ''positive trait''.

** The Prophet of Truth, who in ''VideoGame/Halo3'' rants and raves and comes close to his goal of activating the seven rings that will kill all life in the Milky Way. While his portrayal in the novels and ''VideoGame/Halo2'' is more that of a cunning and ''sane'' manipulator, he was apparently driven to madness after the events of ''2'', when 343 Guilty Spark revealed to him the full truth about the Halo Array's purpose (though he already had his doubts to begin with).

* Daniella the maid from ''VideoGame/HauntingGround''. She is a homunculus created to be the "perfect woman" by her master. However, she cannot feel pain or pleasure, which drives her to scream at her reflection because she feels she is not "complete". She becomes even crazier and hateful towards Fiona, who ''can'' feel what Daniella cannot. Daniella comes to a logical conclusion - she must obtain the vital essence known as Azoth, which Fiona possesses, in order to become complete. She plans on tearing the Azoth right out of Fiona and pursues her relentlessly throughout part of the game. She is prone to fits of maniacal laughter (her head often spasms violently when she does so) and will shriek at random. She also cries blood and licks a glass shard to complete the effect.
** Supplementary material overlaps this with BreakTheCutie[=/=]BrokenBird - Daniella is actually a human, but was kidnapped by her master as a child and subsequently drugged and tortured to the point that she lost both her memories and the ability to feel pain or passion. In addition to this, a lifetime of monotonous maid tasks in a castle with only three other occupants (at least one of whom is shown to abuse her), her own infertility, and her belief that she's some kind of android drive her mad through her own numbed existence. Looking at her backstory, it's pretty evident that her jealousy towards Fiona is just what pushes her over the edge.
* Lt. Carter Blake in ''VideoGame/HeavyRain'' is a RabidCop who seems unfamiliar with the concept of restraint when performing his duties.
* ''VideoGame/JadeEmpire'''s Black Whirlwind is a hot-headed hulking brute who carries twin axes, has killed innocent noblewomen, burned down temples, and more, most if not all while drunk, but he's on ''your'' side.

* Several major villains and anti-villains in ''Franchise/KingdomHearts''.
** Larxene show this trait throughout her life as a nobody. She often mocks and ridicules allies as well as enemies for a fake feeling of enjoyment, and seemingly enjoys inflicting physical as well as emotional pain on others including Sora, Namine, Roxas, and even Elsa.
** Axel displays this trait much. Like Larxene, he pretended to enjoy hurting others and also flashed a [[SlasherSmile wide grin]] at such moments. He carried out [[ChronicBackstabbingDisorder a series of betrayals]] throughout the series and killed several of his allies ruthlessly for his own motives and sometimes just for his personal enjoyment.
** Roxas also shows this trait after realizing the truth of his existence, attacking both of best friends ruthlessly and killing one while injuring the other, in the process. He also recklessly destroys the central computer of Virtual Twilight town and keeps attacking [=DiZ=]'s hologram in spite of knowing that he could not attack [=DiZ=] in real. He even goes to the extent of attacking his own somebody, Sora.
** Saïx exhibits this in his lunar-powered state.
** Vanitas from ''VideoGame/KingdomHeartsBirthBySleep''. Justified given that [[spoiler: he is the pure incarnation of Ven's darkness.]]
* HK-47 from ''VideoGame/KnightsOfTheOldRepublic'' is a sadistic killing machine who enjoys nothing more than the slaughter of anything and everything around him. Fortunately, [[SociopathicHero he's on your side]].
** Twitch, a Rodian arena fighter on Taris, seems to be this.
** Many of the students in the [[AcademyOfEvil Korriban Sith Academy]] have AxCrazy tendencies.
** In the [[DarkerAndEdgier sequel]], HK-47 is back again, and it's possible to pick up a truly psychotic Wookie named [[TheBerserker Hanharr]]. [[spoiler:Atton]] is also [[DarkAndTroubledPast implied]] to have more than a little of this. ''Much'' more than a little, if you [[ToxicFriendInfluence encourage it]]...
** Darth Malak, the [[BigBad main villain]] from the first game, is also pretty Ax-Crazy. During the course of the game, he [[spoiler: [[MoralEventHorizon orders the complete orbital bombardment of a planet]]]] [[ForTheEvulz even though]] [[GeneralFailure simply sending more competent people after Bastila would have been more effective]]. Pre-game, he also [[spoiler: destroys one of the party's home-planets this way]], [[IfYoureSoEvilEatThisKitten just so he could]] [[BadBoss test]] one of his officers.
** If possible, [[TheDragon Darth Malak's apprentice]] needs [[PsychoSupporter even less of a reason to kill people, including his own men.]] In one of his first scenes, [[BadBoss he chokes a Sith officer to death]] [[ForTheEvulz for no discernible reason other than he wants to kill someone.]] At least Malak had [[GeneralFailure the (tenuous) reason of being desperate to take out a dangerous opponent]] when he bombarded the surface of a planet while his troops were still on it.

-->'''Penny''': Hee hee! Penny likes you...but Mr. Bear ''[=HATES YOU!=]''\\
'''Will''': Why are you helping me?\\
'''Penny''': ...Because Mr. Bear told me to.
* In ''VideoGame/AlanWakesAmericanNightmare,'' Mr. Scratch, a HumanoidAbomination EvilTwin (and implied EnemyWithout) of the protagonist is everything Wake isn't, which means he's a flamboyant, psychopathic SerialKiller as well as a particularly sadistic KnifeNut. Worse still, he's hopeful of attempting a KillAndReplace.
* In ''VideoGame/AmericanMcGeesAlice'', well, pretty much everyone. Although with Alice, her goal is to [[EarnYourHappyEnding win her sanity back.]]

* ''VisualNovel/AmnesiaMemories'' has Ukyo's darker, evil side. This side of him seems to [[FlipPersonality pop up out of the blue]] and his [[CreepyShadowedUndereyes facial]] [[SlasherSmile expression]] makes it clear that whatever is keeping his last shred of sanity around is hanging on a silken thread. He makes no secret of his vast, but creepy knowledge about the heroine and the people around her, and often gives thinly-veiled lines to get the heroine into danger. He delights in telling her that he'll kill her and he succeeds in killing her in various Bad Endings.

* Scharlachrot in ''VideoGame/ArcanaHeart 3''. [[spoiler: However, this is as a result of being BrainwashedAndCrazy by the Drexler Institute. She snaps out of this in her ending, though.]]

** The [[VideoGame/BatmanArkhamAsylum first game]] introduces [[spoiler: Quincy Sharp]], who is by all appearances normal when you speak to him except in the [[spoiler: Spirit of Arkham]], where it can be seen that he is an absolutely ''insane'' KnightTemplar.

** Anyone who has been injected with some form of the Lazarus Vector: Lazarus Elixir, Lazarus Phoenix Pinion, Venom, or Titan. Who made these potions and how they are interconnected in the series is a major spoiler, but is responsible for about half of the plot. And yes, Batman also took it.

** In a strange way, the player character makes Batman crazy. What else would you call gliding around Gotham City and Arkham Asylum looking for gang members to horrendously punch, explode, electrocute, freeze, glue, hang, and humiliate, all while leaving them alive and in tremendous pain/fear? For "EXP" so that you can equip Waynetech that Batman already has? OR leaving criminals to do their thing while you scour the map looking for trophies that look like green hooks?
* Lilarcor the talking sword in ''VideoGame/BaldursGateII''. It's a fairly powerful sword that houses the soul of a bloodthirsty idiot. Every bit of Lilarcor's dialogue consists of it whining about how it's not killing anyone at the moment and asking you to hurry up and kill someone with it.
* ''VideoGame/BendyAndTheInkMachine:'' By the time Susie Campbell gets turned into an ink creature, she is largely LostInCharacter and has also developed multiple personalities, one of which claims of her murders that GollumMadeMeDoIt. She has personally eviscerated at least ten other {{Toon}}s, whose corpses she leaves on display. When [[PlayerCharacter Henry]] goes to see her on Level 9, she's in the middle of torturing a Butcher Gang clone, and between Chapters 3 and 4, she kidnaps Henry's friend Boris and [[spoiler: [[ReforgedIntoAMinion reforges him into a minion]]]]. She suffers from mood swings and sometimes sets her own outbursts off with her monologing, such as the time at the end of Chapter 3 when she breaks down in the middle of talking about heaven - first crying then laughing - and [[spoiler: [[ElevatorFailure sabotages the elevator]] with Henry and Boris on it]]. Other things set her off too, like the time at the end of Chapter 4 when she enters into a murderous rage because Henry survived the BossFight with [[spoiler: Boris]].
* ''VideoGame/{{Bioforge}}'': The victims of the [[UnwillingRoboticization cyborgization]] process kept becoming this until the MadScientist in charge found out how to stop this. (The player also has the option of acting AxCrazy themselves, as there are points where you can kill someone even though they pose no threat to you.)
* The Splicers in ''VideoGame/BioShock1'' have been reduced to this from repeated use of the PsychoSerum ADAM. Later you learn that they've been targeting you specifically because the ADAM they've been using has an additive that makes them susceptible to MindControl by Andrew Ryan. If it weren't for that, they'd probably going ape on what's left of each other as well. By comparison, the Splicers in the sequel seem to be in better control of their faculties, if still mentally unstable and in the habit of constantly talking to themselves; the Spider Splicers may be an exception.
* BigBad Mordred from the ''VideoGame/BlackMirrorVideoGames'' games.

** In a vein rather similar to Kefka, there's [[CardCarryingVillain Yuuki Terumi]]. He trapped the world in [[GroundhogDayLoop 725 time loops]] of 100 years each through which the world, during just the first 10 years, got ravaged by [[{{Orochi}} an enormous, hydra-like monster]]. This is also arguably one of the ''less'' horrifying acts he has done, solely because the result of it was a continuously repeated impersonal and indiscriminate mass-slaughter on over 50% of the human race... Y'see, it's not until Terumi gets personal with people that his maniacal depravity ''really'' shines through. [[spoiler:He gets worse after reuniting with his original body, the Susanoo Unit. He becomes a lot more serious and focused and actually has the power to back up his threats.]]
** [[RobotGirl Nu-13]] becomes this in regards to anyone who isn't Ragna. [[{{Yandere}} Or even because of Ragna]]. [[spoiler:And if you happen to look like Ragna but aren't, [[VillainousBreakdown God help you]].]]

--->'''Carl''': Oh, please don't die yet, Miss Tsubaki...\\
'''Tsubaki''': ... U-Ugh...\\
'''Carl''': Well, if you'd be so kind as to tell me the whereabouts of my father... Preferably ''before'' you bleed to death.
** With names like The Mad Dog, Massacre King, The [[FinalSolution Genocider]], and The Deathbringer, it's extremely clear that Azrael's an extremely dangerous being who relishes considerably too much in the carnage, so much so that he had to be locked inside a dimensional prison to prevent him from destroying anything and everything in sight.
** [[spoiler:Act 3 of ''Central Fiction'' reveals that the kind, loyal, hardworking Hibiki Kohaku we saw in ''Chronophantasma'' was a mask that hides a deeply disturbed individual. He's willing to kill Kagura to become truly emotionless.]]
** [[TheSociopath Hades Izanami]]. Naturally, being obsessed with death and trying to make a world of death makes her this. She [[DissonantSerenity acts calmer than the other examples]], but that makes it all the more terrifying.
* The [[https://www.youtube.com/watch?v=F5Wg9i3UNOY Assault Bomber]] in ''VideoGame/{{Bomberman}} Generations'' is both a MadBomber and TriggerHappy.
* The Psychos and most other human enemies from ''VideoGame/{{Borderlands}}'' and ''VideoGame/Borderlands2''.
** [[http://borderlands.wikia.com/wiki/Krieg Krieg]], the playable Psycho, deserves special mention for taking this trope literally, with his special skill being to run around with a giant axe.
** And those are just the most obvious ones. *MOST* of the cast (first, second or one-and-half one... OK, may be inhabitants of Elpis are a bit more sane) is ax-crazy. And those that are not, still see murder as a pretty normal thing. This is this kind of game, yes.
** There's also [[BigBad Handsome Jack]], who is a different form of "Ax-Crazy" than Krieg. At first, Jack just seems to be a CorruptCorporateExecutive who [[{{Troll}} enjoys mocking the Vault Hunters]] [[EvilIsPetty every chance he gets]]. However, later points in the game imply he is a pure [[TheSociopath sociopath]], who absolutely ''relishes'' in [[TortureTechnician torturing his enemies]], and one ECHO recording strongly implies he [[WouldHurtAChild murdered an employee's children]] because that employee pointed out a few flaws in his plan to build Opportunity, [[{{Narcissist}} a city dedicated to himself.]]
** The Sheriff of Lynchwood, AKA Nisha Kadam, in ''VideoGame/BorderlandsThePreSequel'' and ''VideoGame/Borderlands2''. A TriggerHappy sadist who loves watching her enemies die, her "retirement" from Vault Hunting consisted of ruling a town with an iron fist, and filling it with bandits just so she had something to kill.

* ''VideoGame/CliveBarkersUndying'': Most of the Covenant family are insane in one way or another, like with Ambrose beating his father to death with a pool cue simply because he was tired with him meddling in personal affairs, to Bethany settling a rivalry with her brother by gleefully removing his jaw, tying him up in the basement and setting a swarm of hungry rats on him.
* Ripper Roo from ''VideoGame/CrashBandicoot'', one of the very first evolved animals made in the series, speaks entirely in [[LaughingMad insane laughter]] and ''loves'' explosives. There's also the Evil Twins from ''VideoGame/CrashTwinsanity''.
* [[NamesToRunAwayFromReallyFast Heartless]] from ''VideoGame/CrossingSouls'' is a SociopathicSoldier taken UpToEleven. When sent after [[EvilGenius Bronson]] for failing the BigBad, Bronson's [[AndThenWhat attempts to reason with him fall flat]] because A) the plan could lead to potentially wiping out humanity and Heartless is such a BloodKnight he's looking forward to it and B) the Big Bad is going to [[spoiler:use a machine to connect the world to the afterlife and use a ghost army to conquer the world]] so even if Bronson is right and Heartless does die in the process [[BackFromTheDead it won't stop him]]. Later when Heartless actually tries to negotiate with the heroes to get the McGuffin they refuse because they know what kind of person he is. Heartless actually congratulates them on their common sense and thanks them for the chance to shoot them, [[WouldHurtAChild and the protagonists are kids mind you.]]

** ''VisualNovel/DanganronpaTriggerHappyHavoc'': The BigBad Monokuma set up the entire death game because of his [[HopeCrusher obsession with despair]]. The Ax-Crazy doesn't really come out until TheReveal, though. [[spoiler:The SerialKiller Genocide Jack/Jill also counts, as she kills cute boys for a sexual thrill. In the final chapter, Monokuma/[[SamusIsAGirl Junko]] and Jill even share a bit of crazy banter with each other.]]
** ''VisualNovel/Danganronpa2GoodbyeDespair'': [[spoiler: [[BandageBabe Mikan]] wasn't too [[ShrinkingViolet mentally stable]] to begin with due to a lifetime of abuse, which made her that much easier for [[TheCorrupter Junko to manipulate]]. When she gets her [[ApocalypseCult Ultimate Despair]] memories back, all pretenses of sanity promptly go out the window after she's outed as a double murderer.]]
** ''VisualNovel/DanganronpaV3KillingHarmony'': [[spoiler: [[ObviouslyEvil Korekiyo]]'s general creepiness was commented on so often it would've been more surprising if he ''hadn't'' ended up becoming a killer, although the true extent of it isn't shown until he's outed as a SerialKiller with a split personality. Additionally, the [[BigBad mastermind Tsumugi]] was a psychopath obsessed with the DeadlyGame she and her associates cultivated, and murdered Rantaro solely because TheShowMustGoOn.]]
* ''VideoGame/DarkSoulsI'' has Lautrec, who is a loner vagabond who uses and kills [[spoiler: Anastacia, the fire keeper of Firelink Shrine.]] The Darkwraiths you meet in-game became Ax-Crazy after becoming DrunkWithPower and undead that have lost all their remaining humanity are insane, violent shells of who they once were. That said, some hollows you find are docile and often huddle themselves into corners, crying.

** Mound-Makers in ''VideoGame/DarkSoulsIII'' are easily the least stable of the "evil" covenants: Rosaria's Fingers and the Aldrich Faithful have religious or personal motivations, but the Mound-Makers exist solely to rampage around killing anyone in their path and are rewarded in the same way for killing fellow invaders as they are the Host of Embers. The Mound-Maker NPC you can encounter, Holy Knight Hodrick, views the skulls of his victims as "family"; when you summon him for a rematch on the Road of Sacrifices, instead of focusing primarily on the player like most invaders, he'll charge blindly at anything that crosses his path...which can [[CombatPragmatist save you a lot of trouble]], if you kite him towards Yellowfinger Heysel or the Exile Watchdogs since those won't respawn if he kills them.
* Pick a ''VideoGame/DeadRising'' boss, any ''VideoGame/DeadRising'' boss. We have {{Crazy Survivalist}}s, [[MonsterClown chainsaw-juggling clowns]], [[ImAHumanitarian "Humanitarians"]], {{pyro|Maniac}}s, [[ChurchMilitant infidel-slaying cultists]]... Maybe going berserk is something of an advantage in a zombie infestation.
** Arguably the most disturbing example is Brandon Whittaker of the second game. A [[ZombieAdvocate C.U.R.E]] protester who watched people die during the outbreak and subsequently lost his mind. He now serves "the cause" by deliberately feeding people to zombies to turn them. When Chuck protests, he goes ''absolutely batshit'' and attacks him with a giant glass shard. [[spoiler:What's worse, after you defeat him, he gets bitten by the same zombie he tried to use on a hostage, and [[MoralMyopia immediately commits suicide]]]].
*** [[spoiler:And, if Off the Record is any indication, ''he is the one who started the outbreak''.]]

* [[spoiler:The main enemies]] in the final level of ''VideoGame/DeusExHumanRevolution''.

* In ''VideoGame/DoubleSwitch'', [[spoiler: Eddie]] is revealed to be this.
* The Darkspawn of ''Franchise/DragonAge'' are a ''race'' of Ax-Crazy {{Blood Knight}}s. Being the embodiment of The Maker's condemnation of mortals (according to The Chantry), the Darkspawn exist to kill and do [[https://www.youtube.com/watch?v=ykrTzj0G1zY horrible things]] to the world. They will do their best to kill anything and everything they come across that isn't also Tainted; if they can't find anything nontainted nearby to kill they will readily try to kill each other. Only an Archdemon has the power and will to unite the murderous bastards and keep them from killing each other when they get bored. Unfortunately, Archdemons, being Tainted dragon ''gods'', are also Ax-Crazy. That's why Blights happen. [[spoiler: Even some of the "freed" Darkspawn in ''Awakening'' are Ax-Crazy]].
* ''VideoGame/{{Drakengard}}'':
** Arioch is an Ax-Crazy Elven ActionGirl. Due to the loss of her children (presumably right in front of her eyes and in [[HeroicBSOD some gruesome way]]), she's now a cannibal and has a preference for small children. [[BlackAndGreyMorality She's also on the player's side.]]
** Caim, our [[SociopathicHero "hero"]], also qualifies.

** Memorably, in the Website/SomethingAwful Let's Play fortress of {{LetsPlay/Boatmurdered}}, the fortress deteriorated to a level where it was in a constant state of anarchy, with dwarfs becoming so annoyed by the smoke and miasma that they snapped and went on a rampage, invariably killing a dwarf that was the relative of another dwarf, driving that dwarf into a homicidal rage, and so on. Probably the best individual moment of this was when one of the former governors of the fortress, who was possessing of insane strength, managed to beat several other dwarfs to death incredibly messily. [[MemeticMutation DID I MENTION HE IS ON FUCKING FIRE!??]]
*** A (rather appropriate) meta example from that very LetsPlay comes in the form of [=StarkRavingMad=], one of the appointed overseers of the fortress, who devises a plan to finally end the siege of elephants that was threatening to kill them all:
---->'''[=StarkRavingMad=]:''' I've started project 'Fuck The World,' a top-secret attempt to funnel magma to the outside. I'll kill those elephants. I'll kill ''all'' those fucking elephants.

** Sheogorath, the [[MadGod Daedric Price of Madness]], oddly enough plays with this trope. For someone who ends all his conversations with "Visit again or I'll pluck out your eyes!", he is surprisingly nonviolent. Even if you attack him, he doesn't attack back directly, just scolds you and teleports you into the sky, causing you to fall to your death. (Or possibly leaves you where you are, and hurls ''the planet'' at ''you''. He's used a ColonyDrop before in the {{backstory}} after all...) Just don't make him too happy or talk to him while he's contemplating having Brain Pie for lunch. Further, he's actually not technically in control of "Axe Crazy" only but Madness as a whole. Mehrunes Dagon and or maybe Boethiah might be more "Axe Crazy" since they're both a lot more violent and associated with violence. Dagon in particular likes to sent you on a mission to kill people who he dislikes, if he's not trying to smash you himself.
** The infamous Therana from ''[[VideoGame/TheElderScrollsIIIMorrowind Morrowind]]'' is a ReallySevenHundredYearsOld wizard whose life-extending necromancy doesn't seem to have worked so well on her mind as the rest of her fellow Telvanni. She is at all times incomprehensibly senile, which wouldn't be so bad if not for her habit of turning murderously violent on a whim.
** In the ''Tribunal'' expansion, [[PhysicalGod Tribunal deity]] Almalexia proves herself to be this. While she appears to be fairly stable initially, the one-on-one confrontation with her at the end of the expansion reveals just how far ''gone'' she really is. And the ensuing battle shows just how ''dangerous'' she is.
** Glarthir, from ''[[VideoGame/TheElderScrollsIVOblivion Oblivion]]''. He believes three of the other [=NPCs=] are conspiring against him and sets you to tail them. Not a single one of them actually is -- but if you tell him this, he'll assume they've turned you as well, and whip out an axe to take you out before you get him. If you lie, he'll ask you to kill whoever you fingered, or do it himself if you refuse.
** In the series' backstory, [[TheCaligula Emperor Pelagius the Mad]] certainly lived up to his nickname. He wasn't just insane, he was said to be ''homicidally'' insane. When his madness became too publicly apparent, he was removed from the throne and placed into an asylum. Toward the end of his life, he was known to [[FullFrontalAssault strip naked and attack/bite visitors]]. Sheogorath's quest in ''[[VideoGame/TheElderScrollsVSkyrim Skyrim]]'' actually has you [[PetTheDog posthumously cure Pelagius]] of whatever madness ailed him.
** Also from the backstory, Pelinal Whitestrake, the legendary hero of mankind/[[FantasticRacism racist]] [[TheBerserker berserker]]. Said to be a [[GodInHumanForm Shezarrine]], Pelinal came to [[FounderOfTheKingdom St. Alessia]] to serve as her [[PhysicalGod divine champion]] in the war against the [[AbusivePrecursors Ayleids]]. Pelinal would fly into fits of UnstoppableRage (''mostly'' directed at the Ayleids) during which he [[BloodSplatteredWarrior would be stained with their blood]] and [[PaintTheTownRed left so much carnage in his wake]] that Kyne, one of the [[OurGodsAreDifferent Divines]], would have to [[CueTheRain send in her rain]] to cleanse Ayleid forts and village before they could be used by Alessia's forces. During one particularly infamous fit of rage, Pelinal ''damaged the very lands themselves'', nearly causing the Divines to abandon the mortal world in disgust.

** [[EvilOldFolks Stanislas Braun]] from [[Fallout 3]] has crafted entire virtual realities for him and his fellow vault dwellers to inhabit. Too bad for them Braun uses said virtual realities to torment them in various ways, all the way to murder, which he can undo through his control over the simulation. Braun spent ''two centuries'' repeatedly toying with his test subjects, describing some of their most gruesome deaths with glee in his logs and only getting bored with the actual locations themselves.

** ''VideoGame/FireEmblemAwakening'': Gangrel truly lives up to his epithet, the "Mad King of Plegia." He's prone to fits of [[LaughingMad insane laughter]], and has a strong appetite for bloodshed, to the extent that all of the atrocities he committed were simply to [[PretextForWar start a war with Ylisse]]. After the HeroicSuicide of [[spoiler: Emmeryn, the current Exalt of Ylisse]], his subjects realize what a lunatic he is and [[ZeroPercentApprovalRating desert him en masse]].

* ''VideoGame/BlazBlue''

* The Darkspawn of ''Franchise/DragonAge'' are a ''race'' of Ax-Crazy [[BloodKnight Blood Knights]]. Being the embodiment of The Maker's condemnation of mortals (according to The Chantry), the Darkspawn exist to kill and do [[https://www.youtube.com/watch?v=ykrTzj0G1zY horrible things]] to the world. They will do their best to kill anything and everything they come across that isn't also Tainted; if they can't find anything nontainted nearby to kill they will readily try to kill each other. Only an Archdemon has the power and will to unite the murderous bastards and keep them from killing each other when they get bored. Unfortunately, Archdemons, being Tainted dragon ''gods'', are also Ax-Crazy. That's why Blights happen. [[spoiler: Even some of the "freed" Darkspawn in ''Awakening'' are Ax-Crazy]].

** T-Bone from ''Videogame/GrandTheftAutoSanAndreas''. He is brutally sadistic and impulsive when gets really angry. In "The Introduction" video, he gives a brutal beating of another gang member, possibly to the point of killing him, and at one point threatens to rape and kill CJ's family as a "joke."

** Supplementary material overlaps this with BreakTheCutie/BrokenBird - Daniella is actually a human, but was kidnapped by her master as a child and subsequently drugged and tortured to the point that she lost both her memories and the ability to feel pain or passion. In addition to this, a lifetime of monotonous maid tasks in a castle with only three other occupants (at least one of whom is shown to abuse her), her own infertility, and her belief that she's some kind of android drive her mad through her own numbed existence. Looking at her backstory, it's pretty evident that her jealousy towards Fiona is just what pushes her over the edge.

** Roxas also shows this trait after realizing the truth of his existence, attacking both of best friends ruthlessly and killing one while injuring the other, in the process. He also recklessly destroys the central computer of Virtual Twilight town and keeps attacking DiZ's hologram in spite of knowing that he could not attack DiZ in real. He even goes to the extent of attacking his own somebody, Sora.

** And on a literal note, [[spoiler: [[TheBusCameBack Masked Dedede]]]] in ''VideoGame/KirbyTripleDeluxe''. But we can't blame him as [[spoiler: King Dedede was [[BrainwashedandCrazy hypnotized]] by [[EvilPuppeteer Taranza]] at the start of the game.]]

* ''Franchise/MegaMan''

** Alfred and Alexia Ashford from [[VideoGame/ResidentEvilCodeVeronica Resident Evil – Code: Veronica]]. Exploring Rockfort Island and reading the files that have been left behind by former inmates and employees paints an unflattering picture of Alfred as a deeply unstable, sadistic lunatic who dabbles extensively in torture and human experimentation. Then you meet him in person and it only gets worse from there. It turns out, [[spoiler:he also has a split personality that takes the form of his sister Alexia, who is cryogenically frozen in Umbrella's Antarctic facility. He loves her and has devoted his entire life to the service of her, in a way that carries some decidedly... [[IncestSubtext ''dark'' undertones]].]] Alexia turns out to be even more of a crazed megalomaniac than her twin brother, and [[EvilIsHammy every bit as hammy]].

* While most of the murderers in the ''Franchise/DanganRonpa'' series acted out of [[DeadlyGame desperation]], there are some outliers.

* ''VideoGame/DarkSouls'' has Lautrec, who is a loner vagabond who uses and kills [[spoiler: Anastacia, the fire keeper of Firelink Shrine.]] The Darkwraiths you meet in-game became Ax-Crazy after becoming DrunkWithPower and undead that have lost all their remaining humanity are insane, violent shells of who they once were. That said, some hollows you find are docile and often huddle themselves into corners, crying.

* Sapphire of ''{{VideoGame/Disgaea 3|AbsenceOfJustice}}'' qualifies. Not as dangerous as some here, but still quite violent.

* ''Franchise/TheElderScrolls''

---->'''Niko''': ''[after killing two random gangsters]'' AAAAAAAAAAARRGH MOTHERFUCKERS!!!

* In the ''[[VideoGame/MarySkelterNightmares Mary Skelter]]'' [[VideoGame/MarySkelterNightmares franchise]], any Blood Maidens that fall into Blood Skelter start qualifying for this ''[[UpToEleven and then some]]'' on the spot. It doesn't matter how they are normally: once they fall into the state, they immediately become [[TheBerserker raving berserkers]] that can't even communicate with others outside of LaughingMad and the occasional pained screaming. Yes, that includes what are normally the absolute nicest ones, so poor Sleeping Beauty doesn't escape this possibility at all.

** Apart from Zoe, the Baker family from ''VideoGame/ResidentEvil7Biohazard'' are introduced as the very embodiment of this trope. They pursue Ethan around their property in a murderous rage, attacking him on sight for no discernible reason, and have been in the habit of abducting and killing people for years. It turns out that they weren't always like this; [[spoiler: their insanity is due to the E-001 bioweapon (more commonly known as "Eveline", who was given the form of a little girl) taking control over their minds. (Eveline herself technically also qualifies, but as she is, in fact, a bioweapon, this is probably by design.)]] There is one exception - their son Lucas, an accomplished inventor since childhood, was a deranged psychopath long before [[spoiler: Eveline arrived]]. As a young boy, he locked a bully in the attic and allowed him to starve to death. His shtick is constructing elaborate [[{{Franchise/Saw}} Saw]]-like traps for Baker family captives to endure. It's later revealed that he [[spoiler: was cured of Eveline's mind control by her creators, The Connections, and has been spying on his family for them ever since. They even appointed him as Lead Researcher of their Dulvey lab in 2017, a position that he would severely abuse by subjecting its test subjects (and perhaps even its scientists) to the same treatment as the aforementioned Baker family captives.]]

* In the ''VideoGame/{{Touhou}}'' fangame ''VideoGame/KoumajouDensetsu'', [[PersonOfMassDestruction Flandre Scarlet]] is portrayed this way with a pretty twisted sense of "playing".

** Rafe Adler, the BigBad of ''VideoGame/Uncharted4AThiefsEnd'', is implied to not be all that sane, as shown at the start of the game when he stabs a corrupt prison warden to death, and later on, when he warns Sully that if he tries bidding on the local {{MacGuffin}} at a criminal auction, he'll leave the auction house "in a goddamn body bag". As his rivalry with the Drake brothers continues, he becomes increasingly more deranged, until he finally snaps and decides to [[spoiler:force Nate into a DuelToTheDeath ''when they're both locked in the hold of a pirate ship which is disturbingly close to exploding and consigning them both to a fiery death''.]]

--->Guns don't kill people, '''I do!''' (cackles insanely)

* ''VisualNovel/DanganronpaTriggerHappyHavoc'': The BigBad Monokuma set up the entire death game because of his obsession with despair. The Ax-Crazy doesn't really come out until TheReveal, though. [[spoiler:The SerialKiller Genocide Jack/Jill also counts, as she kills cute boys for a sexual thrill. In the final chapter, Monokuma/[[SamusIsAGirl Junko]] and Jill even share a bit of crazy banter with each other.]]

* ''VideoGame/FarCry'':

* ''VideoGame/Uncharted'':

**

* ''VisualNovel/PhoenixWrightAceAttorneySpiritOfJustice'': Typically in ''Franchise/AceAttorney'', the murderers in each case are not examples of this trope as they usually only murder once or twice at most[[note]]Even [[spoiler:Dahlia]], who had planned to kill up to five people, was not blatantly deranged.[[/note]] and tend to have motives for their crimes (even if they are petty or selfish). Even when {{Professional Killer}}s with high body counts are involved, they remain [[ConsummateProfessional professional]] and only kill when necessary or when ordered to do so. This game's BigBad, [[spoiler:[[GodSaveUsFromTheQueen Queen]] Ga'ran Sigatar Khura'in]], is the most openly bloodthirsty culprit in the franchise. [[spoiler: In addition to being an insane megalomaniac, she seems to revel in having executions, specifically [[OffWithHisHead beheadings]]. She also shows no qualms about calling for the genocide of defense attorney within general the country of Khura'in.]] While this person is able to hide this under their [[FauxAffablyEvil polite and serene]] [[spoiler: regal]] exterior, the gloves are off during the final case with the extent of their madness put on full display. [[spoiler: Not only does she act more hostile as a prosecutor and openly threaten to have Phoenix and Apollo beheaded ''on the defense bench'', she even ''[[ScrewTheRulesIMakeThem rewrites rules mid-trial]]'' to make it easier for them to slip up and do something that will allow her to call for their executions quicker once they point the finger at her.]]

* Material-L, Fate's EvilTwin from ''[[VideoGame/MagicalGirlLyricalNanohaAsPortable Magical Girl Lyrical Nanoha A's: The Battle of Aces]]''.

* ''VideoGame/SenranKagura'' gives us Yomi, Ryōbi and Ryōna. Yomi's tendency to pretty much go ballistic on anyone who happens to be a wealthy individual, and her obsession with bean sprouts ascends levels of violent and unnerving. Ryōna on the other hand is ''much worse''. She's a CombatSadomasochist with even more emphasis on masochist. She'll likely ask random people to perform harmful acts on her just for her satisfaction. What happens if you don't? Let's just say that it won't end well for you. Finally we have Ryōbi who is an absolute sadist that gets a lot of joy out of beating down her opponents.
-->'''Ikaruga:''' Wait! You said you had to kill me to complete your mission! What is the meaning of this?\\
'''Yomi:''' Those who sneer at bean sprouts will someday die by bean sprouts. That is the meaning of this.
* The [[AntagonistTitle Titular]] [[VideoGame/SpookysJumpscareMansion Spooky]], despite her usual {{Jerkass}} behavior, has shown quite the deranged side. From sending dozens of people ([[BadBoss including her own employees]]) to be slaughtered by her Specimens, to having a wicked SlasherSmile after killing Santa.
* Downplayed in ''VideoGame/WolfensteinTheNewOrder''. While much of it depends on your playstyle, it's made clear that B.J Blazkowicz is this -- he's a bit ''too'' eager to go the extra mile in killing Nazis. The fact that [[ThereIsNoKillLikeOverkill he can and will dual wield virtually every weapon in-game]], he interrogated a nazi with [[ChainsawGood a chainsaw]], and he tends to stab people at the worst possible moment in cutscenes just proves it further.
** Frau Engel as well. It's apparent in the first game that in forcing B.J at gunpoint to play a "race purity" game and then passing it all off as a little joke, she's not really well upstairs. Come ''VideoGame/WolfensteinIITheNewColossus'' and she's even more unhinged as [[spoiler:she chops Caroline's head off and desecrates her dead body with childish glee.]]
** Adolf Hitler himself has become a 71-year-old DarkLordOnLifeSupport by the events of ''The New Colossus'', and his senility has taken a serious toll on his already addled mind. He's become a paranoid lunatic seemingly barely aware of reality, babbling about his mother one minute and remorselessly murdering the actors for his latest propaganda film the next.
* ''VideoGame/FarCry'':
** ''VideoGame/FarCry3'': A great many people, which the advertising for the game heavily emphasized:
*** Special mention goes to Vaas Montenegro, who's crazy even by everyone else's standards.
*** Buck. Not as obvious as Vaas. However, he's a brutal sadist who enjoys torture, rape and murder.
*** Hoyt Volker. TheDon meets AxCrazy extraordinaire: He's a deranged, homicidal {{sadist}} who commits mass murder on a regular basis.
** ''VideoGame/FarCry5'':
*** The Seeds in general. John and Jacob tend to be a bit more expressive in the "Ax" department, but all four of them are violent and crazy.
*** '''The Cook''', no one else compares. He's the villain of the sidequest ''"A Dish Served Cold"'' and by far the most deranged psycho in the entire game.
* ''VideoGame/{{Xenogears}}'' has Id, also known as [[NamesToRunAwayFromReallyFast the Demon]] [[RedBaron of Elru]]. Whenever he pops up, he goes around killing ''everything'' in sight, committing genocide, crashing a "space station" (killing all the people living inside), or just behaving like a "normal" serial killer, and murdering people one by one. [[spoiler:In reality, Id is actually [[TheHero Fei]]'s SplitPersonality. The guy has a lot of issues.]]
* Sunshine Bear, the mascot-costumed serial killer from ''VideoGame/CampSunshine'', is a psychotic maniac who butchers everyone in his path indiscriminately, leaving a trail of bloody corpses littering the game's entire layout.
* Captain Hayashi from ''VideoGame/{{Jet Set Radio}} Future'' will attempt to murder you for your petty crimes, sending in all the tanks and using an experimental {{Spider Tank}}.
* The Dude from ''VideoGame/{{Postal}}'', full stop.
* Kurodōji from ''[[VideoGame/{{Onmyoji}} Onmyōji]]'' who [[LaughingMad laughs nonstop]] [[PutTheLaughterInSlaughter as he kills]]. All while being [[CreepyChild a little boy]].

* The ''VideoGame/GrandTheftAuto'' series is a CrapsackWorld full of violent and deranged criminals.
** Catalina. In ''[[VideoGame/GrandTheftAutoIII III]]'', she already shoots two of her apparent love interests, but it goes even further in [[VideoGame/GrandTheftAutoSanAndreas San Andreas]]: she has graves dug by her house, she sexually abuses CJ (and still thinks she loves him), she threatens to kill/castrate CJ, and she takes glee in killing any cops or civilians who get in her way.
** T-Bone from ''Videogame/GrandTheftAutoSanAndreas''. He is brutally sadistic and impulsive when gets really angry. In "The Introduction" video, he gives a brutal beating of another gang member, possibly to the point of killing him, and at one point threatens to rape and kill CJ's family as a "joke."
** Tommy Vercetti from ''VideoGame/GrandTheftAutoViceCity'', is aggressive and easily angered, and has no problem killing his victims with chainsaws (not for nothing he was nicknamed "The Butcher of Hardwood"). Also one occasion he was sent by the leader of the bikers to wreak havoc in the city.
** Toni Cipriani from ''VideoGame/GrandTheftAutoLibertyCityStories''. He literally dismembered a man with an ax, only to then take his remains to a butcher's shop. Also, said remains were ''the owner's''
** ''VideoGame/GrandTheftAutoIV'':
*** All is not well in Niko Bellic's head. This is probably the result of PTSD and grief. He has also a deep talent for carnage and always fought like a raging {{berserker}}. What would you call someone who massacres dozens of gangsters for a few dollars, all while he curses and screams, and commits dozens of acts of vigilantism for the same reason?
--->'''Niko''': ''[after killing two random gangsters]'' AAAAAAAAAAARRGH MOTHERFUCKERS!!!
*** Ray Bulgarin. He's extremely impulsive, violent, aggressive, and paranoid, to the point of shooting his own sister unprovoked, possibly killing her. [[spoiler: Later, he beheads the cook who stole his diamonds and presents the disembodied head as a death threat to Luis.]]
*** [[spoiler: Dimitri Rascalov as well]], [[SanitySlippage more and more as the game progresses.]]
*** Other examples include Mikhail Faustin and psychos like Jeff Harlingford and Eddie Low.
** ''VideoGame/GrandTheftAutoV'':
*** Trevor Philips is, to say the least, ''completely fucking insane''. The trailer alone showed him brutalizing random people and committing wanton destruction for kicks, but that merely scratches the surface: he's completely unpredictable, extremely violent, and disturbingly easy to piss off, he's a meth addict and an alcoholic, he is heavily implied to occasionally ''[[ImAHumanitarian eat people]]''.
*** From the same game, we have Steve Haines, a showboating (literally -- he has his own TV show) FIB agent who's just a little too eager to bring the protagonists in, Peter Dreyfuss, a murderous film director who was behind the disappearance of a starlet named Leonora Johnson in the '70s, and The Altruists, a cult comprised of former baby boomers who take in "lost souls" to "purify" them.
*** Michael [=DeSanta=] himself. He's just very good at hiding it. SplitPersonality and [[UnstoppableRage anger issues]] aside, he sounds pretty psychotic during random killings.
---->'''Michael''': ''[during random killings]'' AIN'T THE AMERICAN DREAM GRAND!
* ''Franchise/{{Halo}}'':
** The Prophet of Truth, who in ''VideoGame/Halo3'' rants and raves and comes close to his goal of activating the seven rings that will kill all life in the Milky Way. While his portrayal in the novels and ''VideoGame/Halo2'' is more that of a cunning and ''sane'' manipulator, he was apparently driven to madness after the events of ''2'', when 343 Guilty Spark revealed to him the full truth about the Halo Array's purpose (though he already had his doubts to begin with).
** Ripa 'Moramee, the Arbiter from ''VideoGame/HaloWars'', is an even clearer example; he's loyal to Regret, but otherwise cares only about killing things.

* Fritz from ''VideoGame/BrainDead13'', whose deranged methods of killing involve eggbeaters, harpoons, and a blender. Combine that with him being a {{Determinator}}, and, well... you're screwed.
* ''VisualNovel/DanganronpaTriggerHappyHavoc'': The BigBad Monokuma set up the entire death game because of his obsession with despair. The Ax-Crazy doesn't really come out until TheReveal, though. [[spoiler:The SerialKiller Genocide Jack/Jill also counts, as she kills cute boys for a sexual thrill. In the final chapter, Monokuma/[[SamusIsAGirl Junko]] and Jill even share a bit of crazy banter with each other.]]

* ''VisualNovel/AmnesiaMemories'' has Ukyo's darker, evil side. This side of him seems to [[FlipPersonality pop up out of the blue]] and his [[CreepyShadowedUndereyes facial]] [[SlasherSmile expression]] makes it clear that whatever is keeping his last shred of sanity around is hanging on a silken thread. He makes no secret of his vast, but creepy knowledge about the heroine and the people around her, and often gives thinly-veiled lines to get the heroine into danger. He delights in telling her that he'll kill her and he succeeds in killing her in various Bad Endings.
* If you want an example of a nutcase in ANY racing game ''ever'', ''VideoGame/NeedForSpeedMostWanted'' introduces [[TheFreelanceShameSquad Blacklist]] member [[BitchAlert Kira]] (Kamikaze or "Kaze") [[JapaneseDelinquent Nakazato]] whose [[DrivesLikeCrazy driving style is straight up aggressive and borderline near-suicidal]] and isn't afraid to dent her car as long as she can take out the competition. Especially '''[[PlayerCharacter YOU]]'''.

* The Psychos and most other human enemies from ''VideoGame/{{Borderlands}}'' and ''VideoGame/Borderlands2''.
** [[http://borderlands.wikia.com/wiki/Krieg Krieg]], the playable Psycho, deserves special mention for taking this trope literally, with his special skill being to run around with a giant axe.
** And those are just the most obvious ones. *MOST* of the cast (first, second or one-and-half one... OK, may be inhabitants of Elpis are a bit more sane) is ax-crazy. And those that are not, still see murder as a pretty normal thing. This is this kind of game, yes.
** There's also [[BigBad Handsome Jack]], who is a different form of "Ax-Crazy" than Krieg. At first, Jack just seems to be a CorruptCorporateExecutive who [[{{Troll}} enjoys mocking the Vault Hunters]] [[EvilIsPetty every chance he gets]]. However, later points in the game imply he is a pure [[TheSociopath sociopath]], who absolutely ''relishes'' in [[TortureTechnician torturing his enemies]], and one ECHO recording strongly implies he [[WouldHurtAChild murdered an employee's children]] because that employee pointed out a few flaws in his plan to build Opportunity, [[{{Narcissist}} a city dedicated to himself.]]
** The Sheriff of Lynchwood, AKA Nisha Kadam, in ''VideoGame/BorderlandsThePreSequel'' and ''VideoGame/Borderlands2''. A TriggerHappy sadist who loves watching her enemies die, her "retirement" from Vault Hunting consisted of ruling a town with an iron fist, and filling it with bandits just so she had something to kill.
* Several major villains and anti-villains in ''Franchise/KingdomHearts''.
** Larxene show this trait throughout her life as a nobody. She often mocks and ridicules allies as well as enemies for a fake feeling of enjoyment, and seemingly enjoys inflicting physical as well as emotional pain on others including Sora, Namine, Roxas, and even Elsa.
** Axel displays this trait the much. Like Larxene, he pretended to enjoy hurting others and also flashed a [[SlasherSmile wide grin]] at such moments. He carried out [[ChronicBackstabbingDisorder a series of betrayals]] throughout the series and killed several of his allies ruthlessly for his own motives and sometimes just for his personal enjoyment.
** Roxas also shows this trait after realizing the truth of his existence, attacking both of best friends ruthlessly and killing one while injuring the other, in the process. He also recklessly destroys the central computer of Virtual Twilight town and keeps attacking DiZ's hologram in spite of knowing that he could not attack DiZ in real. He even goes to the extent of attacking his own somebody, Sora.
** Saïx exhibits this in his lunar-powered state.
** Vanitas from ''VideoGame/KingdomHeartsBirthBySleep''. Justified given that [[spoiler: he is the pure incarnation of Ven's darkness.]]

* ''VideoGame/BlazBlue''
** In a vein rather similar to Kefka, there's [[CardCarryingVillain Yuuki Terumi]]. He trapped the world in [[GroundhogDayLoop 725 time loops]] of 100 years each through which the world, during just the first 10 years, got ravaged by [[{{Orochi}} an enormous, hydra-like monster]]. This is also arguably one of the ''less'' horrifying acts he has done, solely because the result of it was a continuously repeated impersonal and indiscriminate mass-slaughter on over 50% of the human race... Y'see, it's not until Terumi gets personal with people that his maniacal depravity ''really'' shines through. [[spoiler:He gets worse after reuniting with his original body, the Susanoo Unit. He becomes a lot more serious and focused and actually has the power to back up his threats.]]
** [[RobotGirl Nu-13]] becomes this in regards to anyone who isn't Ragna. [[{{Yandere}} Or even because of Ragna]]. [[spoiler:And if you happen to look like Ragna but aren't, [[VillainousBreakdown God help you]].]]
** And there's also [[BlobMonster Arakune]], the LaughingMad [[TheUnintelligible unintelligible]] EldritchAbomination who will [[ImplacableMan never stop hunting for]] the Azure, and kill and/or [[IAmAHumanitarian consume]] anyone who gets in his way.
** There's also [[TheRival Jin Kisaragi]], who becomes this around [[{{Yandere}} Ragna]] or [[BerserkButton Noel]], courtesy of the [[EvilWeapon Yukianesa]].
** Carl Clover. [[BerserkButton Especially if you touch Nirvana/Ada]], or try to hide information about his father Relius. In Tsubaki's story mode, losing to him leads to him ''killing his childhood friend''.
--->'''Carl''': Oh, please don't die yet, Miss Tsubaki...\\
'''Tsubaki''': ... U-Ugh...\\
'''Carl''': Well, if you'd be so kind as to tell me the whereabouts of my father... Preferably ''before'' you bleed to death.
** With names like The Mad Dog, Massacre King, The [[FinalSolution Genocider]], and The Deathbringer, it's extremely clear that Azrael's an extremely dangerous being who relishes considerably too much in the carnage, so much so that he had to be locked inside a dimensional prison to prevent him from destroying anything and everything in sight.
** [[spoiler:Act 3 of ''Central Fiction'' reveals that the kind, loyal, hardworking Hibiki Kohaku we saw in ''Chronophantasma'' was a mask that hides a deeply disturbed individual. He's willing to kill Kagura to become truly emotionless.]]
** [[TheSociopath Hades Izanami]]. Naturally, being obsessed with death and trying to make a world of death makes her this. She [[DissonantSerenity acts calmer than the other examples]], but that makes it all the more terrifying.
* ''VideoGame/JadeEmpire'''s Black Whirlwind is a hot-headed hulking brute who carries twin axes, has killed innocent noblewomen, burned down temples, and more, most if not all while drunk, but he's on ''your'' side.
* Ignus, a fire mage, from ''VideoGame/PlanescapeTorment'', who nearly burned down the city of Sigil before being stopped, can join your party. Ravel Puzzlewell, who almost destroyed the city of Sigil before the Lady intervened, is connected with your character. The Xaosects/Chaosmen, represented mainly by the insane Starved Dogs Barking thugs, prowl The Hive (though you can speak to one, Barking-Wilder, and turn him briefly sane). Acaste, the Ghoul Queen, hungers for flesh, though that's pretty standard procedure for a ghoul. One of your ''own'' past incarnations was quite ax crazy and damn near impossible to kill, to boot. You can use a fossilized arm of his as a weapon.
* The crown king of all Ax-Crazy RPG villains is Luca Blight from ''VideoGame/SuikodenII'', hands down. Nothing is safe from his wrath...[[WouldHurtAChild not even small children]]. In fact, Luca rewrites the book on badass, as it eventually takes as many as ''eighteen'' of your party members, [[AnnoyingArrows several volleys of arrows]] (each one shown capable of immediately killing one of his soldiers), and after all this, a duel to the death with the main character to bring him down in a suitably ''epic'' ClimaxBoss battle.
* Albedo from the ''VideoGame/{{Xenosaga}}'' series. The particularly disturbing "Ma-Peche" scene gives testament to this, [[spoiler:especially when he tears his own head off to prove a point about how he can not die]].
** In the Japanese version, [[spoiler: he cuts it off]], but the edited scene in the English release actually manages to be more disturbing than the original.
* Omega from the ''VideoGame/MegaManZero'' series is a mechanical embodiment of this trope. His sole purpose is simply to kill. His bloodthirsty nature rivals even a Khorne Berserker.
** Who may actually be Zero's SuperpoweredEvilSide and/or EvilCounterpart inhabiting a separate body.
*** Worse than that, he's [[spoiler:''exactly'' what [[BigBad Dr. Wily]] had intended the ''real Zero'' to be]]. In fact, [[spoiler:Zero is ''indeed'' Ax Crazy, before his HeelFaceTurn]].
** Omega's own creator, Dr. Weil, also qualifies. Destroying a whole neighborhood just to [[spoiler:capture the Dark Elf]]? Check. Making humans' lives completely miserable, with the choice of either dying or living under his rule? Check. Setting a KillSat to destroy a human encampment? Check. Plus, going completely nuts after the KillSat is set and fired against himself, initiating a ColonyDrop with him '''''inside''''' the satellite, believing himself to survive the crash...
*** And before all that, the fact that Weil's schemes in the [[AllThereInTheManual Elf Wars]] caused TheEndOfTheWorldAsWeKnowIt and claimed the lives of 60% of all humans, and 90% of all Reploids. Sheesh...
*** He's such an incredibly dangerous person to have around that even after his bodily death, his sheer loathing and insanity leached into the surrounding wreckage, giving ''inanimate'' material the ability to ''feel hatred and desire complete obliteration'' of all sentient life on the planet. Even so, killed and diffused, he's still so thoroughly evil that mere proximity to fragments of this wreckage can drive a person to insanity, which eventually becomes a major plot point in the sequel series ''VideoGame/MegaManZX''.
** Vile from ''VideoGame/MegaManX''. Similar to Galvatron, an accident regarding his brain led to him developing a disturbing relish in not only terminating Mavericks but also causing as much collateral damage as he can while destroying the maverick in question. He also has a sociopathic hatred of X, and he revolts against authority namely to cause destruction.
* ''VisualNovel/NineHoursNinePersonsNineDoors'' has [[spoiler:Clover in the "Axe" ending chopping up Santa, Seven, June, and Junpei, over her brother's death]].
** The [[VisualNovel/VirtuesLastReward sequel]] invokes this again [[spoiler: by making it look as if Clover killed Luna in a rage. Subverted, though, as it was an accident.]]
* ''VideoGame/SuperPaperMario'' has [[spoiler:Dimentio]]. It's not obvious at first, but about three-quarters of the way through the game he starts [[spoiler:killing characters left and right, all the while cracking jokes and delivering lines like "It won't be so bad, I promise", in addition to being TheStarscream]]. He's also referred to as being psychotic at least once in the game.
* Half the freaking cast of ''VideoGame/MetalGear'':
** Psycho Mantis from the original ''VideoGame/MetalGearSolid''. He joined Liquid's coup just to kill as many people as possible, and he's easily the most depraved member of Liquid's FOXHOUND unit.
** [[MadBomber Fatman]] in ''VideoGame/MetalGearSolid2SonsOfLiberty''. He views the explosions his bombs cause as artistic displays.
** Colonel Volgin of ''VideoGame/MetalGearSolid3SnakeEater''. Highlights of Volgin's psychotic dickery include nuking his own country, trying to destabilise the Cold War, and randomly torturing and killing his own minions simply because he can. When [[spoiler:Snake's eye gets shot out]], he practically orgasms at the sight of it.
** The Beauty and the Beast Unit from ''VideoGame/MetalGearSolid4GunsOfThePatriots'' is an AmazonBrigade full of Ax-Crazy women driven insane by horrific war-time atrocities. They also have PoweredArmor, so that's cool too.
** Sundowner, Mistral and [[spoiler:Raiden himself]] in ''VideoGame/MetalGearRisingRevengeance''. Sundowner is a war-loving murderous sociopath who uses scissor swords, Mistral [[PayEvilUntoEvil butchered the murderers of her parents]] and [[spoiler:arranged for Khamsin's death simply because she found him annoying]], and as for [[spoiler:Raiden, it's revealed that he always was somewhat AxCrazy ever since he was a child soldier, but only after a Breaking Speech by Monsoon does his darker side resurface]].
* Daniella the maid from ''VideoGame/HauntingGround''. She is a homunculus created to be the "perfect woman" by her master. However, she cannot feel pain or pleasure, which drives her to scream at her reflection because she feels she is not "complete". She becomes even crazier and hateful towards Fiona, who ''can'' feel what Daniella cannot. Daniella comes to a logical conclusion - she must obtain the vital essence known as Azoth, which Fiona possesses, in order to become complete. She plans on tearing the Azoth right out of Fiona and pursues her relentlessly throughout part of the game. She is prone to fits of maniacal laughter (her head often spasms violently when she does so) and will shriek at random. She also cries blood and licks a glass shard to complete the effect.
** Supplementary material overlaps this with BreakTheCutie/BrokenBird - Daniella is actually a human, but was kidnapped by her master as a child and subsequently drugged and tortured to the point that she lost both her memories and the ability to feel pain or passion. In addition to this, a lifetime of monotonous maid tasks in a castle with only three other occupants (at least one of whom is shown to abuse her), her own infertility, and her belief that she's some kind of android drive her mad through her own numbed existence. Looking at her backstory, it's pretty evident that her jealousy towards Fiona is just what pushes her over the edge.
* In the first ''VideoGame/MechWarrior'', you can get pilots to help you in your group, each comes with a picture and a quote along with their stats before you hire them. One of them is Killer, wearing a ski mask, with the quote "I want to burn villages and eat dead, burnt bodies, kill, kill, kill!"
** The quote is from the 1969 movie Alice's Restaurant. Arlo Guthrie's character acts like he's crazy in order to get out of military service. But despite his best efforts he seems to be sane enough for them.
** He gets an homage in ''[=MechWarrior=] 2: Mercenaries'' in the form of Jake "Killer" Ives, a cheerful psychopath who was also a cheap, effective pilot, noted in his hiring profile to be a sadist bar none, with HumongousMecha as his tool of choice for hurting other people.
* UsefulNotes/AkechiMitsuhide from ''VideoGame/SengokuBasara'' takes being a CombatSadomasochist to new heights, often creating slaughter for his own enjoyment while [[GigglingVillain giggling]] and [[LimpAndLivid swaying]]. However, his is a more coldly calculating kind of insanity.
* Many of the bosses in ''VideoGame/NoMoreHeroes'', and more so in its sequel. Special mention goes to Bad Girl, who bats blindfolded gimps at you and beats you with a burning baseball bat, the insane superhero Destroyman, the [[GirlishPigtails pig-tail wearing]] {{Yandere}} Kimmy Howell, the damned soul of Matt Helms, and Jasper Batt Jr. after taking some PsychoSerum. In fact, most of the remaining assassins come off as {{Retired Monster}}s who got BoredWithInsanity.
* From ''[[VideoGame/RiseOfTheKasai The Mark of Kri]]'' we have Tati. This deserves special mention because her older brother [[ProudWarriorRaceGuy Rau]] is the one with the ax, but he's remarkably calm and level headed. And he never speaks in anything except battle cries. [[spoiler: Unless Tati turns to TheDarkSide, in which he will utter her name once before Tati and the forces of darkness slaughter him.]] Tati, on the other hand, is ''very'' vocal and has moments of exceeding maliciousness. The way she slaughters single enemies with her knives looks more painful than anything Rau does with his ax, and considering the body count Rau racks up with it, that's saying something.
* There are many examples in the ''VideoGame/TalesSeries'':
** Barbatos Goetia of ''VideoGame/TalesOfDestiny 2'' had committed numerous atrocities to prove that he was the strongest warrior of all, which eventually caused him to be [[UnPerson written out of history]]. Even after his resurrection, he became so obsessed with trying to prove himself that he repeatedly attempted to [[HeroKiller kill]] ''[[HeroKiller actual]]'' [[HeroKiller heroes]] in Stahn and Rutee just to get at their son Kyle.
** The main reason Jade Curtiss from ''VideoGame/TalesOfTheAbyss'' banned replicating living creatures was that when he attempted to revive his mentor who he accidentally killed through it, the resulting clone was an ultra-powerful BonusBoss with a sociopathic personality. No wonder he was a bit apprehensive about using it again.
** Zagi from ''VideoGame/TalesOfVesperia'', who, at about 3/4 through the game seems to have no reason for wanting to kill Yuri other than that he wants to kill Yuri. His Ax-Crazy status is lampshaded by his [[MadEye one eye that's smaller than the other]], possibly because he's so insane that he can't be bothered to hold them both open. [[spoiler: In one of the boss battles against him, he casts Poison on HIMSELF!]] Most battles consist of him spouting random crap about wanting to kill Yuri.
** Judith also qualifies, especially if you're listening very carefully to her in-battle dialogue. [[LaughingMad She giggles]] when ripping apart enemies and will send enemies off with an almost evil-sounding, whispered "goodbye". She's shown to be disappointed by both the 100 and 200 Man Melees (even fellow BloodKnight Yuri was satisfied by the 200 Man Melee) and frequently voices boredom if she's either not allowed to fight a lot or if battles are too short/too easy. Even [[NervesOfSteel Yuri's]] scared of her, because he fully believes she'll allow a monster to eat her just to rip it open from the inside out. She's not quite on a level with Zagi (that is, she's not InsaneEqualsViolent), but she definitely plays this trope. People will note that Judy's not all there in the head, including your party members. She tells the others that bloodshed excites her in a skit and she loves that blood is spilled when she inflicts pain on others. She doesn't, however, think of herself as this trope (as she's pretty hurt then annoyed when asked twice by two different people if the 200 Man Melee wasn't violent enough for her) and [[spoiler: she has problems fighting members of your party when forced to]].
** Agria from ''VideoGame/TalesOfXillia''. Her looks, [[LimpAndLivid posture]], and frequent laughter make it readily apparent that she's got more than a few screws loose.
%%** Way back in ''VideoGame/TalesOfEternia'', there's [[spoiler:Hyades]]. In ''VideoGame/TalesOfInnocence'', there's [[ThatOneBoss Hasta]], who loves to disorientate the party and players alike with his creepy manner of speaking.
* [[SuperpoweredEvilSide The God of War Melqart]] in ''VideoGame/TearsToTiara2'', appropriately. Also Izebel.
* While [[LoadsAndLoadsOfCharacters many characters]] in the ''VideoGame/TrailsSeries'' could qualify, the biggest example is Shirley Orlando, a [[PrivateMilitaryContractor Jaeger]] and one of the most violent characters in the entire series. She's surprisingly [[DissonantSerenity friendly and cheerful]]...untill she gets a severe case of [[BloodKnight bloodlust]]. She's so violent, in fact, [[spoiler: she gets scouted as an Enforcer of Ouroboros, and she accepts,]] and her weapon is a massive sword that is [[BifurcatedWeapon also a chainsaw and a flamethrower]]. Was it mentioned she's only ''14''?

*** In a non-villainous example, [[PsychopathicWomanChild Peri]] takes a huge liking to murdering people with little provocation.

* Several of the playable characters from ''VideoGame/TeamFortress2'':
** The Scout considers hurting people to be his purpose in life.
** The Soldier, after being refused entry by the army during early WWII, took a ship to Europe and fought "the Nazis" until 1947.
** The Heavy really likes fighting, and sometimes takes advice from inanimate objects ("What's that, sandvich? Kill them all? Good idea!").
** The Pyro is a ''literally'' Ax-Crazy PsychopathicManchild who sees the world as a SugarBowl full of giant lollipops and infantile cherubs. When s/he's killing people with a flamethrower, from his/her point of view s/he's just blowing bubbles and rainbows at them.
** And there's the ax-wielding Horseless Headless Horsemann, the NPC from the Scream Fortress update, who attempts to hunt down and behead every player he encounters.
* Needles Kane the driver of Sweet Tooth in the ''VideoGame/TwistedMetal'' series, especially his ''Twisted Metal Black'' incarnation.
** The cast of ''VideoGame/TwistedMetalBlack'' is made up of delusional priests, hillbilly psychos, and doll-faced murderers. The sanest characters in the whole thing are [[BigBad Calypso]], Agent Stone, and John Doe. The last two are genuinely good and sane people, who are in it for just reasons, and were institutionalized for severe PTSD and amnesia-related conditions. Still, the fact that the BigBad is saner than most of the cast is somewhat... disturbing.
* Aran Ryan from the Wii version of ''VideoGame/PunchOut'' Most of the other characters emit grunts of pain or anger when you've landed a massive combo on them. Him? ''Deranged laughter''.
** In between rounds, he shouts to Mac, "Keep hitting me! ''I love it!!''" Then, when he gets back in the ring, he punches himself several times, then makes an insane smile at the camera. His fighting style involves him running around the ring and attacking from the side, as well as jumping off the wires and trying to punch. This guy was perfectly normal in his first appearance.
*** "Your wimpy little punches won't even faze me." There's taking a hit and then there's getting your jollies from it.
** Bald Bull from the same game gives a similar impression, both in that before matches he'll beat himself over the head for no apparent reason, and the way in which he rises from a knockdown in Title Defense mode is downright terrifying.
* HK-47 from ''VideoGame/KnightsOfTheOldRepublic'' is a sadistic killing machine who enjoys nothing more than the slaughter of anything and everything around him. Fortunately, [[SociopathicHero he's on your side]].
** Twitch, a Rodian arena fighter on Taris, seems to be this.
** Many of the students in the [[AcademyOfEvil Korriban Sith Academy]] have AxCrazy tendencies.
** In the [[DarkerAndEdgier sequel]], HK-47 is back again, and it's possible to pick up a truly psychotic Wookie named [[TheBerserker Hanharr]]. [[spoiler:Atton]] is also [[DarkAndTroubledPast implied]] to have more than a little of this. ''Much'' more than a little, if you [[ToxicFriendInfluence encourage it]]...
** Darth Malak, the [[BigBad main villain]] from the first game, is also pretty Ax-Crazy. During the course of the game, he [[spoiler: [[MoralEventHorizon orders the complete orbital bombardment of a planet]]]] [[ForTheEvulz even though]] [[GeneralFailure simply sending more competent people after Bastila would have been more effective]]. Pre-game, he also [[spoiler: destroys one of the party's home-planets this way]], [[IfYoureSoEvilEatThisKitten just so he could]] [[BadBoss test]] one of his officers.
** If possible, [[TheDragon Darth Malak's apprentice]] needs [[PsychoSupporter even less of a reason to kill people, including his own men.]] In one of his first scenes, [[BadBoss he chokes a Sith officer to death]] [[ForTheEvulz for no discernible reason other than he wants to kill someone.]] At least Malak had [[GeneralFailure the (tenuous) reason of being desperate to take out a dangerous opponent]] when he bombarded the surface of a planet while his troops were still on it.
* [[SociopathicHero Meria]] from ''VideoGame/KnightsInTheNightmare'' is a lovable example.
** She's like this in ''Roleplay/DeptHeavenApocrypha'', too.
* ''VideoGame/BatmanArkhamSeries'' has [[spoiler: Quincy Sharp]], who is by all appearances normal when you speak to him except in the [[spoiler: Spirit of Arkham]], where it can be seen that he is an absolutely ''insane'' KnightTemplar.
** The main villains of the plot, some of the absolute craziest of Batman's rogues gallery. [[SerialKiller Zsasz]], ComicBook/TheJoker, [[IAmAHumanitarian Killer Croc]]...
** And of course, anyone who has been injected with some form of the Lazarus Vector: Lazarus Elixir, Lazarus Phoenix Pinion, Venom, or Titan. Who made these potions and how they are interconnected in the series is a major spoiler, but is responsible for about half of the plot. And yes, Batman also took it.
** ComicBook/ThePenguin. Not as obvious as The Joker, but he is extremely sadistic, bloodthirsty, and cruel. His methods of torture are pretty brutal.
** In a strange way, the player character makes Batman crazy. What else would you call gliding around Gotham City and Arkham Asylum looking for gang members to horrendously punch, explode, electrocute, freeze, glue, hang, and humiliate, all while leaving them alive and in tremendous pain / fear? For "EXP" so that you can equip Waynetech that Batman already has? OR leaving criminals to do their thing while you scour the map looking for trophies that look like green hooks?
* The Burning Blade clan in ''VideoGame/{{Warcraft}} II'' and ''VideoGame/WorldOfWarcraft'' deserve a mention, as a clan of Ax Crazies that were held in check by a large group of ogre enforcers. The Horde "was not willing to employ them except in the most extreme cases, for fear that they might turn on other clans or even each other".
** ''Warcraft III'' has the Alliance rifleman (well, rifledwarf) revealed as this if you [[StopPokingMe click on one often enough]].
--->Guns don't kill people, '''I do!''' (cackles insanely)
** Though decidedly one of the less maniacal cases of insanity, it is heavily implied that the Ghosts in the ''VideoGame/StarCraft'' universe would've liquidated the universe if it weren't for the inhabiting implants in their brains.
--->Whenever I see a world untouched by war, a world of innocence, a world of lush forests and clear rivers... I really just wanna ''nuke the crap out of it''!
** The Burning Blade are puppies in comparison to the [[VillainousHarlequin Laughing]] [[PrecisionFStrike Fucking]] [[VillainousHarlequin Skull]]
* ''VideoGame/ZombiesAteMyNeighbors'' has both Chainsaw Maniacs and traditional ax-wielding Evil Dolls. The sounds of a chainsaw revving offscreen coupled with insane children's laughter serve to keep you awake at night.

* Pick a ''VideoGame/DeadRising'' boss, any ''VideoGame/DeadRising'' boss. We have {{Crazy Survivalist}}s, [[MonsterClown chainsaw-juggling clowns]], [[ImAHumanitarian "Humanitarians"]], {{pyro|Maniac}}s, [[ChurchMilitant infidel-slaying cultists]]... Maybe going berserk is something of an advantage in a zombie infestation.
** Arguably the most disturbing example is Brandon Whittaker of the second game. A [[ZombieAdvocate C.U.R.E]] protester who watched people die during the outbreak and subsequently lost his mind. He now serves "the cause" by deliberately feeding people to zombies to turn them. When Chuck protests, he goes ''absolutely batshit'' and attacks him with a giant glass shard. [[spoiler:What's worse, after you defeat him, he gets bitten by the same zombie he tried to use on a hostage, and [[MoralMyopia immediately commits suicide]]]].
*** [[spoiler:And, if Off the Record is any indication, ''he is the one who started the outbreak''.]]
* The BigBad [[spoiler:Elizabeth Greene]] from ''VideoGame/{{Prototype}}'' is so Ax-Crazy that she forces Alex Mercer (who is quite violent in his own right) into an alliance with Blackwatch in order to bring her down. [[spoiler:The fact that her mind was fried by Carnival II some time ago might have something to do with this.]]
* Material-L, Fate's EvilTwin from ''[[VideoGame/MagicalGirlLyricalNanohaAsPortable Magical Girl Lyrical Nanoha A's: The Battle of Aces]]''.
* Penny from ''[[VideoGame/NintendoWars Advance Wars: Days of Ruin]]'' vacillates between being an [[TheOphelia Ophelia]] and being Ax-Crazy, mainly depending on the wishes of her stuffed Mr. Bear.
-->'''Penny''': Hee hee! Penny likes you...but Mr. Bear ''[=HATES YOU!=]''\\
'''Will''': Why are you helping me?\\
'''Penny''': ...Because Mr. Bear told me to.
* In ''VideoGame/SoulNomadAndTheWorldEaters'', the OmnicidalManiac Gig is a good example of this. [[spoiler: Absolutely ''everyone'' on your side is Ax-Crazy in the Demon Path.]]
* Both [[VideoGame/SandsOfDestruction the game]] and [[Anime/SandsOfDestruction manga]] of ''World Destruction'' has the heroine, [[NamesToRunAwayFromReallyFast Morte]], who is more than happy to blow up a city. The anime version, however, gives us the resident [[TheChick chick]] Rhi'a, who has no qualms to pull out her guns when she is pissed.
* The Darkspawn of ''Franchise/DragonAge'' are a ''race'' of Ax-Crazy [[BloodKnight Blood Knights]]. Being the embodiment of The Maker's condemnation of mortals (according to The Chantry), the Darkspawn exist to kill and do [[https://www.youtube.com/watch?v=ykrTzj0G1zY horrible things]] to the world. They will do their best to kill anything and everything they come across that isn't also Tainted; if they can't find anything nontainted nearby to kill they will readily try to kill each other. Only an Archdemon has the power and will to unite the murderous bastards and keep them from killing each other when they get bored. Unfortunately, Archdemons, being Tainted dragon ''gods'', are also Ax-Crazy. That's why Blights happen. [[spoiler: Even some of the "freed" Darkspawn in ''Awakening'' are Ax-Crazy]].
* ''Franchise/MortalKombat'' has a few characters known for being lunatics. Not counting brainwashed victims and near-mindless beasts, the ones that stand out most are Baraka, Mileena, and [[TheCaligula Shao Kahn.]]
** Probably Skarlet too. Never mind the fact that what she does to her opponent is violent even by the standards of this game (sort of justified, as her powers are supposedly derived from absorbing the blood of others) she seems so incredibly unstable that Shao Kahn had to keep her in chains when he didn't need her to fight or kill someone. (And ''despite'' that, she still showed UndyingLoyalty to him; of course, she was one of his evil creations from the Flesh Pits, like Mileena, who also was incredibly loyal.)

* Lt. Carter Blake in ''VideoGame/HeavyRain''.

* Adele in ''VideoGame/ArcRiseFantasia'' is an [[ChildhoodFriendRomance Unlucky Childhood Friend]]. She did not take it well.
* Snow White from ''VideoGame/FairytaleFights''.
* The [[PlayingWithFire pyromaniac]] Tatsuya Sudou in ''VideoGame/Persona2''. A [[HearingVoices schizophrenic]], psychotic SerialKiller, with his own RoomFullOfCrazy.

** Apart from Zoe, the Baker family from ''VideoGame/ResidentEvil7Biohazard'' are introduced as the very embodiment of this trope. They pursue Ethan around their property in a murderous rage, attacking him on sight for no discernible reason, and have been in the habit of abducting and killing people for years. It turns out that they weren't always like this; [[spoiler: their insanity is due to the E-001 bioweapon (more commonly known as "Eveline", who was given the form of a little girl) taking control over their minds. (Eveline herself technically also qualifies, but as she is in fact a bioweapon, this is probably by design.)]] There is one exception - their son Lucas, an accomplished inventor since childhood, was a deranged psychopath long before [[spoiler: Eveline arrived]]. As a young boy, he locked a bully in the attic and allowed him to starve to death. His shtick is constructing elaborate [[{{Franchise/Saw}} Saw]]-like traps for Baker family captives to endure. It's later revealed that he [[spoiler: was cured of Eveline's mind control by her creators, The Connections, and has been spying on his family for them ever since. They even appointed him as Lead Researcher of their Dulvey lab in 2017, a position that he would severely abuse by subjecting its test subjects (and perhaps even its scientists) to the same treatment as the aforementioned Baker family captives.]]
* In the ''VideoGame/{{Touhou}}'' fangame ''VideoGame/KoumajouDensetsu'', [[PersonOfMassDestruction Flandre Scarlet]] is portrayed this way with a pretty twisted sense of "playing".
** And Yuuka Kazami was this in the UsefulNotes/PC98 games. Genocide was just a game to her... It's been dialed back quite a bit for the 9th game in the series... Though she is still able to worry some characters, including '''Cirno''' of all of them. And there's very little that worries that ice fairy even slightly.
** And now from WordOfGod, Kisume has been confirmed as this much to the fans' surprise. This also makes her somewhat unusual for this trope as she is also a ShrinkingViolet.
* Ripper Roo from ''VideoGame/CrashBandicoot'', one of the very first evolved animals made in the series, speaks entirely in [[LaughingMad insane laughter]] and ''loves'' explosives. There's also the Evil Twins from ''VideoGame/CrashTwinsanity''.
* [[spoiler:Marx]] from ''VideoGame/KirbySuperStar and Ultra''.
** And on a literal note, [[spoiler: [[TheBusCameBack Masked Dedede]]]] in ''VideoGame/KirbyTripleDeluxe''. But we can't blame him as [[spoiler: King Dedede was [[BrainwashedandCrazy hypnotized]] by [[EvilPuppeteer Taranza]] at the start of the game.]]
%%* False Peach and False Zelda from ''VideoGame/SuperSmashBrosBrawl''.
* In ''VideoGame/TheDishwasher: Vampire Smile'', Yuki starts out killing enemies with her teeth and doesn't see much reason to stop.
* In ''VideoGame/DoubleSwitch'', [[spoiler: Eddie]] is revealed to be this.
* ''Franchise/TheLegendOfZelda'' series has a few Ax Crazies:
** Majora from ''[[VideoGame/TheLegendOfZeldaMajorasMask Majora's Mask]]''. Unlike most of the other villains in the franchise, its main motivation for killing/tormenting/etc. its victims is for sheer fun and tries to take it to its logical extreme by crashing the Moon into Termina.
** Zant from ''[[VideoGame/TheLegendOfZeldaTwilightPrincess Twilight Princess]]'', as shown with him killing the queen of the Zoras, [[spoiler: enslaving the Twili against their will]], and his [[NightmareFuel/TheLegendOfZeldaTwilightPrincess unnerving confrontation]] with Link and Midna at Lake Hylia, where he tries to kill the latter. [[spoiler: By the end of the game, the craziness fully manifests itself as he's reduced to a screaming, maniacal wreck.]]
** Ghirahim from ''[[VideoGame/TheLegendOfZeldaSkywardSword Skyward Sword]]''. He has unabashed bloodlust, first promising to beat Link within an inch of his life, then burn him alive, and then finally torture him until he's deafened by his own screams. [[FridgeBrilliance Makes perfect sense when you find out]] [[spoiler: he's actually a LivingWeapon.]]
* [[spoiler:The main enemies]] in the final level of ''VideoGame/DeusExHumanRevolution''.
* The [[https://www.youtube.com/watch?v=F5Wg9i3UNOY Assault Bomber]] in ''[[VideoGame/{{Bomberman}} Bomberman Generations]]'' is both a MadBomber and TriggerHappy.
* BigBad Mordred from the ''VideoGame/BlackMirrorVideoGames'' games.
* Nikolai Diavolo in ''VideoGame/EverythingOrNothing''. Though he never shows this trait within the game, M reveals that even the KGB tried to kill him. To make matters worse, his mentor was the VERY ax-crazy Max Zorin.

* Lilarcor the talking sword in ''VideoGame/BaldursGate'' ''II''. It's a fairly powerful sword that houses the soul of a bloodthirsty idiot. Every bit of Lilarcor's dialogue consists of it whining about how it's not killing anyone at the moment and asking you to hurry up and kill someone with it.
* ''VideoGame/DarkSouls'' has Lautrec, who is a loner vagabond who uses and kills [[spoiler: Anastacia, the fire keeper of Firelink Shrine.]] The Darkwraiths you meet in-game became Ax-Crazy after becoming DrunkWithPower and undead that have lost all their remaining humanity are insane, violent shells of who they once were. That said, some hollows you find are docile and often huddle themselves into corners, crying.
** The Brotherhood of Blood in ''VideoGame/DarkSoulsII'' are murderous wingnuts who worship the God of Blood. Their leader, Titchy Gren, gives a huge rant about slaughter when you meet him.
** Mound-Makers in ''VideoGame/DarkSoulsIII'' are easily the least stable of the "evil" covenants: Rosaria's Fingers and the Aldrich Faithful have religious or personal motivations, but the Mound-Makers exist solely to rampage around killing anyone in their path and are rewarded in the same way for killing fellow invaders as they are the Host of Embers. The Mound-Maker NPC you can encounter, Holy Knight Hodrick, views the skulls of his victims as "family"; when you summon him for a rematch on the Road of Sacrifices, instead of focusing primarily on the player like most invaders, he'll charge blindly at anything that crosses his path...which can [[CombatPragmatist save you a lot of trouble]], if you kite him towards Yellowfinger Heysel or the Exile Watchdogs since those won't respawn if he kills them.
* [[PlayerCharacter Captain Martin Walker]] in ''Videogame/SpecOpsTheLine'' starts out as a run-of-the-mill ActionGenreHeroGuy, but [[SanitySlippage slowly turns extremely violent]] as the game progresses. His [[MercyKill execution moves]] turn into outright ColdBloodedTorture, and the player has the option to [[spoiler:gun down a civilian camp for lynching John Lugo, your squadmate.]]
* Scharlachrot in ''VideoGame/ArcanaHeart 3''. [[spoiler: However, this is as a result of being BrainwashedAndCrazy by the Drexler Institute. She snaps out of this in her ending, though.]]

* ''VideoGame/StreetFighterIV'''s Juri is probably the nuttiest character in the bowl that is ''Street Fighter''. Psychotic with a ''heavy'' dose of SexIsViolence, Juri is quite the unchained animal when left to her own devices.
** There's also Vega, who's a little more hinged than Juri in his day-to-day conduct but the fact he's a {{Narcissist}} to the point of ''murdering people for either being ugly or touching/insulting his face'' probably says a lot about his frame of mind.
* ''VideoGame/{{Bioforge}}'': The victims of the [[UnwillingRoboticization cyborgization]] process kept becoming this until the MadScientist in charge found out how to stop this. (The player also has the option of acting AxCrazy themselves, as there are points where you can kill someone even though they pose no threat to you.)
* In ''VideoGame/AmericanMcGeesAlice'', well, pretty much everyone. Although with Alice, her goal is to [[EarnYourHappyEnding win her sanity back.]]
* ''VideoGame/{{OFF}}'' has both Japhet, who's been driven from perhaps the nicest guardian to a lunatic whose policy became "worship me or die" after a couple years of [[DudeWheresMyRespect thanklessness]], and any Elsen that's been deprived of their sugar for enough time, who will assault even the spectres if they dare be in the same room.
* Birdman in ''VideoGame/{{Galerians}}'' and Parano in the sequel.
* Walter Sullivan in ''VideoGame/SilentHill4''. When you're [[spoiler:the ghost of]] a SerialKiller who's murdered around 20 people before the game even ''starts'', it comes with the territory.
** Also [[spoiler: Eddie]] when you meet [[spoiler: him]] for the last time in ''VideoGame/SilentHill2''.
* The Splicers in ''VideoGame/BioShock1'' have been reduced to this from repeated use of the PsychoSerum ADAM. Later you learn that they've been targeting you specifically because the ADAM they've been using has an additive that makes them susceptible to MindControl by Andrew Ryan. If it weren't for that, they'd probably going ape on what's left of each other as well. By comparison, the Splicers in the sequel seem to be in better control of their faculties, if still mentally unstable and in the habit of constantly talking to themselves; the Spider Splicers may be an exception.

* In ''VideoGame/JusticeLeagueHeroesTheFlash'', Zoom (Wally West's Reverse Flash) floods a city just to get the chance to fight Franchise/TheFlash. It isn't minor flooding, either. It's a literal SunkenCity.
* As it eventually turns out, [[spoiler:The Engineer]] from ''VideoGame/AmnesiaAMachineForPigs'' is a cackling megalomaniac who wants to exterminate all of humanity [[spoiler:because it's a fragment of the protagonist's consciousness given life and driven completely insane by the atrocities of the 20th Century]].
* Kilgor from ''VideoGame/HeroesOfMightAndMagic'' ''III'' is Ax-Crazy even by the standards of the Barbarians. The bloodshed and destruction wrought during his campaign to become Krewlod's new king left Krewlod in a state of near ruin and starvation. His narration during the "Festival of Life" campaign and the thoughts of other characters depict him as a madman who relished slaughter. His madness ushers at the end of Enroth when he acquires the Sword of Frost and wages war on the rest of the world. Gauldoth Half-dead from ''Heroes of Might and Magic IV'' muses that the Reckoning (triggered by the Sword of Frost and Armageddon's Blade clashing) arguably did just as much good as evil since in addition to destroying Enroth it also ended Kilgor's life. In Gauldoth's opinion, Kilgor was so awful that losing the planet was an acceptable price for ending him. The Immortal Hero Tarnum blames himself for Kilgor's rise to power since his own brutal stint as the Barbarian King set a bad example for Krewlod to follow. Because of him, the people of Krewlod considered Ax Craziness a ''positive trait''.
* Hard to say who's the biggest example of this trope in ''VideoGame/{{Outlast}}''... No, wait, no it's not. It's Eddie Gluskin, by several lengths. Even before he was committed to Mount Massive Asylum, Gluskin was a misogynistic SerialKiller who was obsessed with finding the perfect wife and mutilated several women in his attempts to create one. Being {{Mind Rape}}d in one of the Asylum's experiments made him even worse. He turns his, umm, antics on the male inmates of the prison (and eventually the protagonist) and wants them to bear his children, and even has [[GroinAttack a solution to the biological incompatibilities involved]].
* In ''VideoGame/{{Undertale}}'', [[spoiler:the Fallen Child]], according to some people. The character is so obscenely crazy that they will try to ''attack empty space. Repeatedly.'' A complete and utter OmnicidalManiac and one of the most evil and psychotic characters ever presented in video game history, with no love or compassion for other living things. Fittingly, as the character is an abstract incarnation of [[spoiler:[[YouBastard the player's desire for power and progress even if it means killing absolutely everyone in their way]].]] However, this is only one interpretation of their personality. Other people prefer to portray them in a much more sympathetic light.
** There's two more examples. One, the sadistic Flowey the Flower, and two; YOU. Yes, YOU. The person staring at the screen pressing the buttons. Not Frisk, not [[spoiler:the Fallen Child]], nobody else. Just YOU. It is VERY possible for the entire Underground to fear you as a psychotic murderer who only wants to kill every living being. And the game is a master at making you feel very, very bad about it.
* In ''VideoGame/AlanWakesAmericanNightmare,'' Mr. Scratch, a HumanoidAbomination EvilTwin (and implied EnemyWithout) of the protagonist is everything Wake isn't, which means he's a flamboyant, psychopathic SerialKiller as well as a particularly sadistic KnifeNut. Worse still, he's hopeful of attempting a KillAndReplace.

* ''VideoGame/CliveBarkersUndying'': Most of the Covenant family are insane in one way or another, like with Ambrose beating his father to death with a pool cue simply because he was tired with him meddling in personal affairs, to Bethany settling a rivalry with her brother by gleefully removing his jaw, tying him up in the basement and setting a swarm of hungry rats on him.
* There are a slightly worrying number of characters exhibiting these traits in ''VideoGame/LeagueOfLegends'', ranging from demonic swords to two different {{Mad Bomber}}s to artistically inclined serial killers to murderous wolf-men, but one of the craziest has to be Kled. A [[TheNapoleon tiny, ornery Yordle]] who serves as a sort of mascot to Noxian soldiers, Kled's philosophy of life is pretty simple: Kill everyone who trespasses on his land. Also, the entire world and possibly some other stuff too is "his land". Luckily for Kled, he really enjoys killing people, plus [[HearingVoices the voices in his head keep suggesting it]], plus there's [[ImAHumanitarian good eatin' for either him or his pet lizard]] on some of those enemy champions, so he is absolutely fine with it.
-->'''Kled:''' [[LargeHam MY BRAIN IS FULLA WEASELS!]]
* [[NamesToRunAwayFromReallyFast Heartless]] from ''VideoGame/CrossingSouls'' is a SociopathicSoldier taken UpToEleven. When sent after [[EvilGenius Bronson]] for failing the BigBad, Bronson's [[AndThenWhat attempts to reason with him fall flat]] because A) the plan could lead to potentially wiping out humanity and Heartless is such a BloodKnight he's looking forward to it and B) the Big Bad is going to [[spoiler:use a machine to connect the world to the afterlife and use a ghost army to conquer the world]] so even if Bronson is right and Heartless does die in the process [[BackFromTheDead it won't stop him]]. Later when Heartless actually tries to negotiate with the heroes to get the McGuffin they refuse because they know what kind of person he is. Heartless actually congratulates them on their common sense and thanks them for the chance to shoot them, [[WouldHurtAChild and the protagonists are kids mind you.]]
* ''VideoGame/ForeverHome'':
** General Barclyss is a psychotic nihilist with a penchant for bombarding defenseless villages and has the goal of destroying all life on the planet. While he tries to keep up a [[MaskOfSanity stoic demeanor]] during his atrocities, he's also easily provoked by setbacks to the point of slashing away at any living thing (or non-living, as shown by Palisade Prison's hallways). By the end of the game, he no longer hides his unstable nature, as shown by his insane ranting and raving about the meaning of life.
** His second-in-command, General Kail, is so addicted to killing that he treats any period of time when he's not killing as equivalent to holding his bladder. When Barclyss gives him permission to kill volunteers for their army, Kail remarks that it's been far too long since he last did anything like that. This is especially noticeable when he states he can't hold back on firing the Aquadome's cannon at Heyama a second time, despite Barclyss being knocked unconscious and unable to give him orders.
* In ''VideoGame/MogekoCastle'', several people could qualify for this.
** The Mogekos are desperate to have sex with Yonaka, against her consent, and are willing to go to extreme lengths to do so, with one Mogeko willing to blow up the entire castle and find her corpse and bang that.
** Moge-ko is this UpToEleven, who not only lusts after high school girls like the rest of the Mogekos, but torture as well, with all the Mogekos on her floor ending up as wrecks terrified in the knowledge that if they misbehave, they will get killed, and could even get killed for no reason if Moge-ko felt like it.
* In the ''[[VideoGame/MarySkelterNightmares Mary Skelter]]'' [[VideoGame/MarySkelterNightmares franchise]], any Blood Maidens that fall into Blood Skelter start qualifying for this ''[[UpToEleven and then some]]'' on the spot. It doesn't matter how they are normally: once they fall into the state, they immediately become [[TheBerserker raving berserkers]] that can't even communicate with others outside of LaughingMad and the occasional pained screaming. Yes, that includes what are normally the absolute nicest ones, so poor Sleeping Beauty doesn't escape this possibility at all.
** Hell, as ''Mary Skelter 2'' revealed, even resident NiceGuy Jack isn't immune to falling into this trope because guess what? He has his own pseudo-Blood Skelter known as "Ripper Jack" (yes, the Jack the Ripper parallel is for a damn good reason), which causes him to go from illegally nice NonActionGuy status to beating down on both enemies and allies with an ''extremely'' unnerving SlasherSmile decorating his face. [[spoiler:Even if we only see the smile on his Marchen mimic.]]
** Also in ''Mary Skelter 2'', we have the Mysterious Nightmare, a monster that is only capable of thinking of killing everything in sight.[[spoiler:.. with the exception of Jack.]]
* Typically in ''Franchise/AceAttorney'', the murderers in each case are not examples of this trope as they usually only murder once or twice at most[[note]]Even [[spoiler:Dahlia]], who had planned to kill up to five people, was not blatantly deranged.[[/note]] and tend to have motives for their crimes (even if they are petty or selfish). Even when {{Professional Killer}}s with high body counts are involved, they remain [[ConsummateProfessional professional]] and only kill when necessary or when ordered to do so. The BigBad of ''VisualNovel/PhoenixWrightAceAttorneySpiritOfJustice'', [[spoiler:[[GodSaveUsFromTheQueen Queen]] Ga'ran Sigatar Khura'in]], is the most openly bloodthirsty culprit in the franchise. [[spoiler: In addition to being an insane megalomaniac, she seems to revel in having executions, specifically [[OffWithHisHead beheadings]]. She also shows no qualms about calling for genocide of defense attorney within general the country of Khura'in.]] While this person is able to hide this under their [[FauxAffablyEvil polite and serene]] [[spoiler: regal]] exterior, the gloves are off during the final case with the extent of their madness put on full display. [[spoiler: Not only does she act more hostile as a prosecutor and openly threaten to have Phoenix and Apollo beheaded ''on the defense bench'', she even ''[[ScrewTheRulesIMakeThem rewrites rules mid-trial]]'' to make it easier for them to slip up and do something that will allow her to call for their executions quicker once they point the finger at her.]]

* If you want an example of a nutcase in ANY racing game ''ever'', ''VideoGame/NeedForSpeedMostWanted'' introduces [[TheFreelanceShameSquad Blacklist]] member [[BitchAlert Kira]] (Kamikaze or "Kaze") [[JapaneseDelinquent Nakazato]] whose [[DrivesLikeCrazy driving style is straight up aggressive and borderline near-suicidal]] and isn't afraid to dent her car as long as she can take the competition. Especially '''[[PlayerCharacter YOU]]'''.

* ''VideoGame/BendyAndTheInkMachine:'' By the time Susie Campbell gets turned into an ink creature, she is largely LostInCharacter and has also developed multiple personalities, one of which claims of her murders that GollumMadeMeDoIt. She has personally eviscerated at least ten other [[{{Toon}} Toons]], whose corpses she leaves on display. When [[PlayerCharacter Henry]] goes to see her on Level 9, she's in the middle of torturing a Butcher Gang clone, and between Chapters 3 and 4, she kidnaps Henry's friend Boris and [[spoiler: [[ReforgedIntoAMinion reforges him into a minion]]]]. She suffers from mood swings and sometimes sets her own outbursts off with her monologing, such as the time at the end of Chapter 3 when she breaks down in the middle of talking about heaven - first crying then laughing - and [[spoiler: [[ElevatorFailure sabotages the elevator]] with Henry and Boris on it]]. Other things set her off too, like the time at the end of Chapter 4 when she enters into a murderous rage because Henry survived the BossFight with [[spoiler: Boris]].

* Captain Hayashi from ''VideoGame/{{Jet Set Radio}} Future'' will attempt to murder you for your petty crimes, sending in all the tanks and using a experimental {{Spider Tank}}.

* Crypto from ''VideoGame/DestroyAllHumans''. He's a nigh unstoppable killing machine who plans to rip out your brain and destroy your entire town.

*** Ray Bulgarin. He's extremely impulsive, violent, aggressive and paranoid, to the point of shooting his own sister unprovoked, possibly killing her. [[spoiler: Later, he beheads the cook who stole his diamonds and presents the disembodied head as a death threat to Luis.]]

*** Other examples include Mikhail Faustin, and psychos like Jeff Harlingford and Eddie Low.

*** Trevor Philips is, to say the least, ''completely fucking insane''. The trailer alone showed him brutalizing random people and committing wanton destruction for kicks, but that merely scratches the surface: he's completely unpredictable, extremely violent and disturbnigly easy to piss off, he's a meth addict and an alcoholic, he is heavily implied to occasionally ''[[ImAHumanitarian eat people]]''.
*** From the same game, we have Steve Haines, a showboating (literally -- he has his own TV show) FIB agent who's just a little too eager to bring the protagonists in, Peter Dreyfuss, a murderous film director who was behind the disappearance of a starlet named Leonora Johnson in the 70s, and The Altruists, a cult comprised of former baby boomers who take in "lost souls" to "purify" them.

** Arioch is an Ax Crazy Elven ActionGirl. Due to the loss of her children (presumably right in front of her eyes and in [[HeroicBSOD some gruesome way]]), she's now a cannibal, and has a preference for small children. [[BlackAndGreyMorality She's also on the player's side.]]

---->'''[=StarkRavingMad=]:''' I've started project 'Fuck The World,' a top secret attempt to funnel magma to the outside. I'll kill those elephants. I'll kill ''all'' those fucking elephants.

** Sheogorath, the [[MadGod Daedric Price of Madness]], oddly enough plays with this trope. For someone who ends all his conversations with "Visit again or I'll pluck out your eyes!", he is surprisingly nonviolent. Even if you attack him, he doesn't attack back directly, just scolds you and teleports you into the sky, causing you to fall to your death. (Or possibly leaves you where you are, and hurls ''the planet'' at ''you''. He's used a ColonyDrop before in the {{backstory}} afterall...) Just don't make him too happy or talk to him while he's contemplating on having Brain Pie for lunch. Further, he's actually not technically in control of "Axe Crazy" only but Madness as a whole. Mehrunes Dagon and or maybe Boethiah might be more "Axe Crazy" since they're both a lot more violent and associated with violence. Dagon in particular likes to sent you on a mission to kill people who he dislikes, if he's not trying to smash you himself.

** Glarthir, from ''[[VideoGame/TheElderScrollsIVOblivion Oblivion]]''. He believes three of the other [=NPCs=] are conspiring against him, and sets you to tail them. Not a single one of them actually is -- but if you tell him this, he'll assume they've turned you as well, and whip out an axe to take you out before you get him. If you lie, he'll ask you to kill whoever you fingered, or do it himself if you refuse.

** Larxene show this trait throughout her life as a nobody. She often mocks and ridicules allies as well enemies for a fake feeling of enjoyment and seemingly enjoys inflicting physical as well emotional pain on others including Sora, Namine, Roxas, and even Elsa.

** Roxas also shows this trait after realizing the truth of his existence, attacking both of best friends ruthlessly and killing one while injuring the other, in the process. He also recklessly destroys the central computer of Virtual Twilight town, and keeps attacking DiZ's hologram in spite of knowing that he could not attack DiZ in real. He even goes to the extent of attacking his own somebody, Sora.

* The crown king of all Ax Crazy RPG villains is Luca Blight from ''VideoGame/SuikodenII'', hands down. Nothing is safe from his wrath...[[WouldHurtAChild not even small children]]. In fact, Luca rewrites the book on badass, as it eventually takes as many as ''eighteen'' of your party members, [[AnnoyingArrows several volleys of arrows]] (each one shown capable of immediately killing one of his soldiers), and after all this, a duel to the death with the main character to bring him down in a suitably ''epic'' ClimaxBoss battle.

*** He's such an incredibly dangerous person to have around that even after his bodily death, his sheer loathing and insanity leached into the surrounding wreckage, giving ''inanimate'' material the ability to ''feel hatred and desire complete obliteration'' of all sentient life on the planet. Even so killed and diffused, he's still so thoroughly evil that mere proximity to fragments of this wreckage can drive a person to insanity, which eventually becomes a major plot point in the sequel series ''VideoGame/MegaManZX''.
** Vile from ''VideoGame/MegaManX''. Similar to Galvatron, an accident regarding his brain led to him developing a disturbing relish in not only terminating Mavericks, but also causing as much collateral damage as he can while destroying the maverick in question. He also has a sociopathic hatred of X, and he revolts against authority namely to cause destruction.

** The Beauty and the Beast Unit from ''VideoGame/MetalGearSolid4GunsOfThePatriots'' is an AmazonBrigade full of Ax Crazy women driven insane by horrific war-time atrocities. They also have PoweredArmor, so that's cool too.

* Daniella the maid from ''VideoGame/HauntingGround''. She is a homunculus created to be the "perfect woman" by her master. However, she cannot feel pain or pleasure, which drives her to scream at her reflection because she feels she is not "complete". She becomes even crazier and hateful towards Fiona, who ''can'' feel what Daniella cannot. Daniella comes to a logical conclusion - she must obtain the vital essence known as Azoth, which Fiona possesses, in order to become complete. She plans on tearing the Azoth right out of Fiona, and pursues her relentlessly throughout part of the game. She is prone to fits of maniacal laughter (her head often spasms violently when she does so) and will shriek at random. She also cries blood and licks a glass shard to complete the effect.
** Supplementary material overlaps this with BreakTheCutie/BrokenBird - Daniella is actually a human, but was kidnapped by her master as a child and subsequently drugged and tortured to the point that she lost both her memories and the ability to feel pain or passion. In addition to this, a lifetime of monotonous maid tasks in a castle with only three other occupants (at least one of whom is shown to abuse her), her own infertility and her belief that she's some kind of android drive her mad through her own numbed existence. Looking at her backstory, it's pretty evident that her jealousy towards Fiona is just what pushes her over the edge.
* In the first ''VideoGame/MechWarrior'', you can get pilots to help you in your group, each comes with a picture and a quote along with their stats, before you hire them. One of them is Killer, wearing a ski mask, with the quote "I want to burn villages and eat dead, burnt bodies, kill, kill, kill!"
** The quote is from the 1969 movie Alice's Restaurant. Arlo Guthries character acts like he's crazy in order to get out of military service. But despite his best efforts he seems to be sane enough for them.

** Zagi from ''VideoGame/TalesOfVesperia'', who, at about 3/4 through the game seems to have no reason for wanting to kill Yuri other than that he wants to kill Yuri. His Ax Crazy status is lampshaded by his [[MadEye one eye that's smaller than the other]], possibly because he's so insane that he can't be bothered to hold them both open. [[spoiler: In one of the boss battles against him, he casts Poison on HIMSELF!]] Most battles consist of him spouting random crap about wanting to kill Yuri.

*** [[spoiler:Rhea/Seiros]] becomes this on the [[spoiler:Crimson Flower route. After Byleth sides with Edelgard in Chapter 11, she wants nothing more to kill Byleth, and gleefully screams about how she wants to rip their heart out. By the end of the game, she is willing to burn all of Fhirdiad to the ground in order to exact her revenge (despite condemning many innocents to death in the process).]]

** The cast of ''VideoGame/TwistedMetalBlack'' is made up of delusional priests, hillbilly psychos, and doll faced murderers. The sanest characters in the whole thing are [[BigBad Calypso]], Agent Stone, and John Doe. The last two are genuinely good and sane people, who are in it for just reasons, and were institutionalized for severe PTSD and amnesia-related conditions. Still, the fact that the BigBad is saner than most of the cast is somewhat... disturbing.

** ComicBook/ThePenguin. Not as obvious as The Joker, but he is extremely sadistic, bloodthirsty and cruel. His methods of torture are pretty brutal.

* The BigBad [[spoiler:Elizabeth Greene]] from ''VideoGame/{{Prototype}}'' is so Ax Crazy that she forces Alex Mercer (who is quite violent in his own right) into an alliance with Blackwatch in order to bring her down. [[spoiler:The fact that her mind was fried by Carnival II some time ago might have something to do with this.]]

* Penny from ''[[VideoGame/NintendoWars Advance Wars: Days of Ruin]]'' vacillates between being an [[TheOphelia Ophelia]] and being Ax Crazy, mainly depending on the wishes of her stuffed Mr. Bear.

* In ''VideoGame/SoulNomadAndTheWorldEaters'', the OmnicidalManiac Gig is a good example of this. [[spoiler: Absolutely ''everyone'' on your side is Ax Crazy in the Demon Path.]]

* The Darkspawn of ''Franchise/DragonAge'' are a ''race'' of Ax Crazy [[BloodKnight Blood Knights]]. Being the embodiment of The Maker's condemnation of mortals (according to The Chantry), the Darkspawn exist to kill and do [[https://www.youtube.com/watch?v=ykrTzj0G1zY horrible things]] to the world. They will do their best to kill anything and everything they come across that isn't also Tainted; if they can't find anything nontainted nearby to kill they will readily try to kill each other. Only an Archdemon has the power and will to unite the murderous bastards and keep them from killing each other when they get bored. Unfortunately, Archdemons, being Tainted dragon ''gods'', are also Ax Crazy. That's why Blights happen. [[spoiler: Even some of the "freed" Darkspawn in ''Awakening'' are Ax Crazy]].

** And now from WordOfGod, Kisume has been confirmed as this much to the fans surprise. This also makes her somewhat unusual for this trope as she is also a ShrinkingViolet.

* In ''VideoGame/TheDishwasher: Vampire Smile'', Yuki starts out killing enemies with her teeth, and doesn't see much reason to stop.

** Majora from ''[[VideoGame/TheLegendOfZeldaMajorasMask Majora's Mask]]''. Unlike most of the other villains in the franchise, it's main motivation for killing/tormenting/etc. its victims is for sheer fun and tries to take it to its logical extreme by crashing the Moon into Termina.

* Lilarcor the talking sword in ''VideoGame/BaldursGate'' ''II''. It's a fairly powerful sword that houses the soul of a bloodthirsty idiot. Every bit of Lilarcor's dialogue consists of it whining about how its not killing anyone at the moment and asking you to hurry up and kill someone with it.
* ''VideoGame/DarkSouls'' has Lautrec, who is a loner vagabond who uses and kills [[spoiler: Anastacia, the fire keeper of Firelink Shrine.]] The Darkwraiths you meet in game became Ax Crazy after becoming DrunkWithPower and undead that have lost all their remaining humanity are insane, violent shells of who they once were. That said, some hollows you find are docile and often huddle themselves into corners, crying.

** Mound-Makers in ''VideoGame/DarkSoulsIII'' are easily the least stable of the "evil" covenants: Rosaria's Fingers and the Aldrich Faithful have religious or personal motivations, but the Mound-Makers exist solely to rampage around killing anyone in their path, and are rewarded in the same way for killing fellow invaders as they are the Host of Embers. The Mound-Maker NPC you can encounter, Holy Knight Hodrick, views the skulls of his victims as "family"; when you summon him for a rematch on the Road of Sacrifices, instead of focusing primarily on the player like most invaders, he'll charge blindly at anything that crosses his path...which can [[CombatPragmatist save you a lot of trouble]], if you kite him towards Yellowfinger Heysel or the Exile Watchdogs, since those won't respawn if he kills them.

* Kilgor from ''VideoGame/HeroesOfMightAndMagic'' ''III'' is Ax Crazy even by the standards of the Barbarians. The bloodshed and destruction wrought during his campaign to become Krewlod's new king left Krewlod in a state of near ruin and starvation. His narration during the "Festival of Life" campaign and the thoughts of other characters depict him as a madman who relished slaughter. His madness ushers in the end of Enroth when he acquires the Sword of Frost and wages war on the rest of the world. Gauldoth Half-dead from ''Heroes of Might and Magic IV'' muses that the Reckoning (triggered by the Sword of Frost and Armageddon's Blade clashing) arguably did just as much good as evil since in addition to destroying Enroth it also ended Kilgor's life. In Gauldoth's opinion, Kilgor was so awful that losing the planet was an acceptable price for ending him. The Immortal Hero Tarnum blames himself for Kilgor's rise to power, since his own brutal stint as the Barbarian King set a bad example for Krewlod to follow. Because of him, the people of Krewlod considered Ax Craziness a ''positive trait''.

* [[NamesToRunAwayFromReallyFast Heartless]] from ''VideoGame/CrossingSouls'' is a SociopathicSoldier taken UpToEleven. When sent after [[EvilGenius Bronson]] for failing the BigBad, Bronsons [[AndThenWhat attempts to reason with him fall flat]] because A) the plan could lead to potentially wiping out humanity and Heartless is such a BloodKnight he's looking forward to it and B) the Big Bad is going to [[spoiler:use a machine to connect the world to the afterlife and use a ghost army to conquer the world]] so even if Bronson is right and Heartless does die in the process [[BackFromTheDead it won't stop him]]. Later when Heartless actually tries to negotiate with the heroes to get the McGuffin they refuse because they know what kind of person he is. Heartless actually congratulates them on their common sense and thanks them for the chance to shoot them, [[WouldHurtAChild and the protagonists are kids mind you.]]

* In the ''[[VideoGame/MarySkelterNightmares Mary Skelter]]'' [[VideoGame/MarySkelterNightmares franchise]], any Blood Maidens that fall into Blood Skelter start qualifying for this ''[[UpToEleven and then some]]'' on the spot. It doesn't matter how they are normally: once they fall into the state, they immediately become [[TheBerserker raving berserkers]] that can't even communicate with others outside of LaughingMad and the occasional pained screaming. Yes, than includes what are normally the absolute nicest ones, so poor Sleeping Beauty doesn't escape this possibility at all.
** Hell, as ''Mary Skelter 2'' revealed, even resident NiceGuy Jack isn't immune to falling into this trope, because guess what? He has his own pseudo-Blood Skelter known as "Ripper Jack" (yes, the Jack the Ripper parallel is for a damn good reason), which causes him to go from illegally nice NonActionGuy status to beating down on both enemies and allies with an ''extremely'' unnerving SlasherSmile decorating his face. [[spoiler:Even if we only see the smile on his Marchen mimic.]]
** Also in ''Mary Skelter 2'', we have the Mysterious Nightmare, a monster that is only capable of thinking of killing everything in sight.[[spoiler:.. with the exception of Jack.]]

* Kefka from ''VideoGame/FinalFantasyVI''. This is a man who reduced the planet to a burned-out shell [[ForTheEvulz because he could]], and then randomly took out the remaining pockets of civilization with a WaveMotionGun whenever he got bored. That's during his encounter with the Warring Triad. Beforehand, he was, while relatively normal, a man prone to [[LaughingMad breaking into fits of hysterical laughter]] when doing atrocious crimes, had brainwashed Terra and ordered her to torch fifty of his own soldiers alive, attempted to burn Figaro, poisoned Doma (and in that particular case, he also mused maniacally about his joy about listening to "music" revolving around hundreds of people screaming in unison), brutalized various Espers in the MagiTek research facility while maniacally declaring himself [[AGodAmI to be a god]], massacring various Espers at Thamasa as well as burning Thamasa to the ground.
** His backstory reveals that he was the first Magitek Knight, but the process was imperfect, and that he became insane after the process, which is heavily implied to involve brain surgery, meaning that the Empire broke his brain.

* In ''VideoGame/FinalFantasyXIV'', there's Garuda, the [[ElementalEmbodiment Primal]] of [[BlowYouAway Wind]], who is ''completely fucking nuts''. Of the previous two Primals faced in the story, [[PlayingWithFire Ifrit]] wanted [[KneelBeforeZod everyone to bow before him]], while [[DishingOutDirt Titan]] merely [[KnightTemplarParent wished to protect his "children"]]. Garuda, on the other hand, wants to [[OmnicidalManiac kill everyone on the planet]] [[GodsNeedPrayerBadly except for her own worshipers, the Ixal]], and absorb all of the world's [[{{Mana}} aether]] [[GodhoodSeeker to become the one almighty goddess]]. To drive the point home, she is ''constantly'' [[LaughingMad cackling insanely]].

** If possible, [[TheDragon Darth Malak's apprentice]] needs [[PsychoSupporter even less of a reason to kill people, including his own men.]] In one of his first scenes, [[BadBoss he chokes a Sith officer to death]] [[FortheEvulz for no discernible reason other than he wants to kill someone.]] At least Malak had [[GeneralFailure the (tenuous) reason of being desperate to take out a dangerous opponent]] when he bombarded the surface of a planet while his troops were still on it.

* In ''VideoGame/FinalFantasyXIV'', there's Garuda, the [[ElementalEmbodiment Primal]] of [[BlowYouAway Wind]], who is ''completely fucking nuts''. Of the previous two Primals faced in the story, [[PlayingWithFire Ifrit]] wanted [[KneelBeforeZod everyone to bow before him]], while [[DishingOutDirt Titan]] merely [[KnightTemplarParent wished to protect his "children"]]. Garuda, on the other hand, wants to [[OmnicidalManiac kill everyone on the planet]] [[GodsNeedPrayerBadly except for her own worshipers, the Ixal]], and absorb all of the world's [[{{Mana}} aether]] to become [[AGodAmI the one almighty goddess]]. To drive the point home, she is ''constantly'' [[LaughingMad cackling insanely]].

* From ''[[VideoGame/RiseOfTheKasai The Mark of Kri]]'' we have Tati. This deserves special mention because her older brother [[ProudWarriorRaceGuy Rau]] is the one with the ax, but he's remarkably calm and level headed. And he never speaks in anything except battle cries. [[spoiler: Unless Tati turns to TheDarkSide, in which he will utter her name once before Tati and the forces of darkness slaughter him.]] Tati, on the other hand, is ''very'' vocal and has moments of exceeding maliciousness. The way she slaughters single enemies with her knives looks more painful than anything Rao does with his ax, and considering the body count Rao racks up with it, that's saying something.
* Barbatos Goetia of ''VideoGame/TalesOfDestiny 2'' is also an example of Ax Crazy trying to prove that he's the strongest out there, which caused him to be written out of history in the first place. It's not just his personality that is insane, his power is also insane that he can even be invulnerable against magic whenever someone tries to cast one. He also wields an ax. If you want more of his Ax Crazy stuffs, just listen him pull an EvilLaugh or his {{Kiai}}.