Insanity

Insanity is a recurring theme in Freedom Fighters NEO. Dozens of characters from all franchises involved (at least one per franchise) have gone or are insane. Insane people exhibit or develop symptoms of mania or outright insanity and seek to cause great harm and destruction to others and the world for their cause. Though these individuals often start off good-willed and mean to help and benefit the world and it's inhabitants, the amount of damage that will be inflected by their plan heavily outweighs the positive changes, and are stopped by others. Some individuals are driven to insanity instead for something that has happened to them or someone they care about while others are driven to prove their own self-worth, and go to extreme measures to do so.

Insane Reploids are usually dubbed '''"Mavericks". '''Aside from the reasons organic lifeforms go insane, Reploids can also go Maverick due to short circuits, programming errors, or viruses.

Below is a list of people that went insane at least once in their life. The order of the franchises was their debut order in real life.

Disney

 * Although Disney doesn't features insanity as much as other franchises, it does has some noteworthy examples. One of them is Mortimer Mouse, who, after Minnie Mouse broke up with him due to Mortimer's selfishness, he constantly tried to make Minnie's next boyfriend and future husband, Mickey Mouse, look bad, despite Mortimer's abusive behavior. This is an obvious hint towards egomania.
 * Despite the breakup, Minnie did take Mortimer out to a movie, although it was mostly to stop Mortimer from bullying Mickey. This reason, however, didn't stop a Metallix Trooper from going Maverick when he overheard a conversation between Minnie and Clarabelle Cow. Said Metallix Trooper slapped Mortimer, tossed him in a wall and then beat him with a bat, all while shouting: "Somebody touched-a mah spaghet! Go home to your-a house! You ate spaghetti, you broke the chair and slept in the bed!"
 * The Phantom Blot is seemingly the most malicious entity in the franchise, being willing to kill Mickey, Minnie and Mickey's friends, Donald Duck and Goofy Goof.
 * Oswald the Lucky Rabbit is another insane Disney character. Originally, he wanted to kill Mickey for replacing him. However, thanks to Mickey, Minnie and Oswald's wife, Ortensia the Cat, Oswald managed to redeem himself, especially after Bendy saved Oswald, Ortensia and a bunch of other cartoons from Ashley.

Mario

 * Although Mario appears as a hero, it is only a facade, as in truth, Mario enjoys the carnage and destruction caused by war. This contradicts his better-natured younger twin brother, Luigi. He was, however, put at respect by the teamwork between Emperor Metallix and Vile.
 * Wario and Waluigi are greedy egomaniacs.
 * Dr. Koopa, while mostly good-natured, seems to be an egomaniac, as he claims anyone against his own philosophy as being villains. Examples of that mistake is betraying the Maverick Hunters due to Zero originally being a Maverick and the fact that Zero killed Iris, who he claimed to be his true love. Another example is Amy Rose, due to Amy's feelings for Sonic, although Dr. Koopa was more justified, since Amy was herself an egomaniac.
 * The one time Dr. Koopa was truly right was when he convinced the Koopa Troop and the Repliforce that Sally's death was a conspiracy planned by Geoffrey St. John, who Dr. Koopa hated due to Geoffrey flirting with Sally and who turned out to be a traitor, working for Ixis Naugus.
 * Dark Bowser is the embodiment of the torment suffered by Bowser as a kid: Bowser was adopted, and never had a normal family until his brother, Morton Koopa, moved in with his kids, the Koopalings, to live with him.

Megaman

 * Dr. Wily was once a man with good intentions; his original vision was to create something that could turn ordinary robots into superheroes by enhancing their powers. Wily attempted to achieve this with the Double Gear System, but Dr. Light, believing that the Double Gear System was too dangerous, got Wily's research on the Double Gear project cancelled while both doctors were still in university. This angered Wily so severely that he ended his friendship with Light and stormed off to prove the world that he was "right all along." Since then, his worldview grew more and more extreme over time; this, combined with the envy Wily developed from constantly being overshadowed by Light's achievements, eventually drove him to attempt to take over the world countless times, even after being defeated by Rock Man time and time again.
 * Zero turned out to be one of the biggest heroes the world ever saw, so it can be said that Wily really was "right all along".
 * Rock and Roll nearly went insane due to their feelings for each other, until Dr. Koopa realized he had no choice but to reveal Roll that she is adopted.
 * After Rock and Roll confessed their feelings for each other, Ice Man, out of jealousy, didn't even want to talk to Rock.
 * Although Quake Woman never went insane herself, she suffers of PTSD due to an accident in which she buried herself alive, causing her to fear that she would lose herself (in other words, go Maverick).
 * Bass was built to destroy Rock. As such, his only feeling was hatred for Rock. This caused Bass to be labeled as a Maverick, due to Bass having a similar behavior with Zero when he originally activated, but unlike Zero, Bass refuses to redeem himself. He was eventually brainwashed by King, alongside Megaman Killers Enker and Punk. (Ballade already redeemed himself.)
 * Sigma originally had a stable grip on his sanity, but he lost it after he went Maverick and his worldview was warped drastically by the Maverick Virus. After fully succumbing to the virus, Sigma adopted the belief that humans are holding Reploids back and must be destroyed in order for Reploids to continue evolving. Acting on this belief, Sigma has made many attempts to destroy humanity, as well as the Maverick Hunters that oppose him. He was eventually cleansed of the Maverick Virus by Dr. Koopa, via Chaos Energy.
 * Zero, upon first waking up, was completely insane due to a glitch in his programming, seemingly not even having the ability to talk beyond manic laughter and rage-filled yells. After being defeated by Sigma, the glitch was fixed, Zero's personality flipped completely, and he became a Maverick Hunter.
 * Although X never became insane at any point, he did express some fear in the Repliforce War that he would ultimately become insane in the future, to the extent that he attempted to make Zero promise him that, should X ever end up going Maverick in the future, Zero would be the one to terminate him in the ending.
 * Vile originally suffered from a short circuit in his electronic brain, causing him to be reckless and needlessly violent. This glitch was fixed by Dr. Koopa, at the cost of Vile's free will. Dr. Koopa threatened Vile that, if he ever turns on Dr. Koopa, the latter would trigger a self-destruct program within Vile. Over time, however, Vile saw the error of his ways, learns what loyalty is, and redeems himself. When Repliforce tries building a Reploid nation after Naugus deemed all Reploids as Mavericks, Vile refused to help Repliforce out of loyalty for Dr. Koopa.
 * Double originally had a split personality befitting his two forms. While his rotund first form is shown to be well-mannered and meek, his second form was shown to be very psychotic and sadistic. Double's access to his battle mode was blocked by Dr. Koopa, causing Double to redeem himself, to the point where, when Geoffrey St. John was revealed to be a traitor, Double blamed himself for the Repliforce War.
 * Iris has a rather unstable heart; if anyone kills those Iris loves (her brother, the Colonel, or her boyfriend/husband, Zero), Iris would try to kill the killer. This goes to the point where, after the Colonel was killed in the Repliforce War, Iris tried to kill both Zero, who was the one who killed the Colonel, and herself.
 * Gate, similar to Dr. Wily, initially had good intentions behind his actions. However, he ended up betrayed by his colleagues, including future Maverick Hunter Alia (although unwillingly on her part) due to jealousy, which left him embittered. Alia managed to convince Gate to join the Maverick Hunters (although it was mostly Dr. Koopa's idea).
 * Layer went insane after learning that Zero would do anything he could to save Iris. Out of jealousy, she tried to destroy her. Since Zero wanted Iris alive, Dr. Koopa saw Layer as a bigger threat than Zero, causing Vile to destroy Layer.
 * Gravity Beetle went insane twice: the first time after Boomer Kuwanger was killed, the second time after falling in love with Comet Woman, shortly after Jet Man went Maverick.
 * See also: Insanity (Mega Man Knowledge Base)

Sonic

 * Dr. Robotnik was shown to be vengeance-filled, psychotic, and very sadistic. He also was shown to be deeply megalomaniacal, as he freely admitted that the only true source of happiness is in dominating over everything forcing everything to work for them, and even tried to become a god. He is so evil he became the figurehead of megalomania.
 * Scourge the Hedgehog and Dr. Weil come as close seconds, due to them being very similar to Robotnik. (both of them take pleasure in hurting innocents)
 * Robotnik's insanity was passed onto Dr. Golden.
 * Sonic fears that he wouldn't be able to save the things, places and persons he loved. This was shown by multiple alter-egos.
 * Fleetway Sonic is seemingly the embodiment of this fear. He also is psychotic and sadistic. After the Endgame Incident, however, Fleetway Sonic redeemed himself, but he also started to fear he'd go insane again.
 * Sally also sports this fear, although she doesn't have a psychotic Super Form.
 * The most notable example for Sonic's fear is Emperor Metallix. He is an alternate future version of Sonic who lost to Robotnik. This makes him more of an egomaniac than Dr. Koopa, as when everyone and everything is against him or the Brotherhood of Metallix, Metallix actually goes Maverick, like when Naugus deemed all Reploids as Mavericks. He also seems to be megalomaniacal himself, as he attempted (and succeeded for a few minutes) to become a god. His egomania goes to the point he sees anyone who declaresto hate a species (Mobian, Reploid or others) as a parasite rather than a lifeform.
 * Amy Rose is an egomaniac, as she often claims to be the right girl for Sonic, although it is rather obvious that Sally is.
 * Ixis Naugus is yet another megalomaniac. He also harbors a hatred for both humanity and Reploids. This hatred for Reploids eventually was his downfall, as he was obliteratedby the Brotherhood of Metallix.
 * Geoffrey St. John went insane after his father's death at the hands of the humans. That was when he betrayed Mobius for Ixis Naugus. Hershey Cat was the only one who grounded Geoffrey to sanity, but she was fatally wounded. The Brotherhood of Metallix originally took care of her, but after Emperor Metallix went Maverick, they let Hershey die and also killed Geoffrey.
 * Professor Gerald Robotnik and Shadow the Hedgehog originally had a firm grip on their sanity, but they went insane after Maria Robotnik died. Shadow managed to redeem himself, but his soul was still wounded, even after Springtrap revived Maria as a hedgehog, although after Maria's revival, Shadow moved from grumpy to overprotective towards Maria.

Five Nights at Freddy's
While it can be said that all the animatronics are insane, due to them being obviously vengeful, here are the people who truly are insane.
 * Similarly to Wily and Gate, William Afton originally had good intentions. However, after his daughter, younger son and wife died, he went insane, going on a kill spree until he was crushed by springlocks.
 * Springtrap's FNAF 3 counterpart is seemingly more insane than his human self, although it might be due to Shadow Freddy's control. After he's freed from it, Springtrap redeems himself, although he goes insane again (milder) when Ballora goes Maverick.
 * Simon is the embodiment of William's insanity, being homicidal and sadistic.
 * Shadow Freddy is Professor Gerald Robotnik resurrected as a Reploid. He remembers Maria's death, and created nightmare-like Mavericks to take away everything William Afton cared about.
 * Jeremy Fitzgerald ordered Popgoes to save his daughter, Bonnie, after accidentally killing her, causing Popgoes to create the Blackrabbit.
 * Ballora, after two marriages between animatronics (Foxy and Mangle, Funtime Freddy and Funtime Foxy), went Maverick due to her own family being divided, although she never was labeled as a Maverick. She calmed down when Springtrap proposed her to rekindle their marriage.
 * Funtime Freddy, after Ballora nearly put a death curse on Mitsuki, constantly tried to convince the Repliforce to label Ballora as a Maverick, although he failed. He only calmed down when Springtrap and Ballora rekindled their marriage, as he thought that they were perfect for each other.

Undertale

 * Asgore went insane after Asriel and Chara's death. He declared war on humanity.
 * Toriel went insane after Asgore declared war on humanity. She decided to exile herself.
 * Flowey, being soulless, went insane, going on a kill spree.
 * Chara went insane after the 4822 Genocide Runs.
 * Genocide Frisk is a megalomaniac.
 * Sans has a great dislike for megalomaniacs, constantly warning them that they're going to have "a bad time" if they kill Papyrus.

Bendy and the Ink Machine

 * Joey Drew was a very greedy and selfish man, nearly megalomaniacal. Emperor Metallix thought that, since Joey hurt the feelings of a demon, Joey wouldn't be welcome in hell, so he trapped Joey into a living nightmare, constantly having the Chaos Force revive him.
 * Bendy went insane after Boris and Alice were tortured and nearly killed by Joey. He also argues quite often with Mickey, arguments that, according to Emperor Metallix, are literal "God vs. Devil" fights.
 * Susie Campbell originally had a firm grip on her sanity, but she lost it after she was replaced with Allison Pendle. After being replaced, she became an egomaniac, often claiming to be "the real Alice Angel". This insanity allowed Miss Twisted to possess Alice when Susie's soul was used to create a clone of Alice, leading to the creation of Twisted Alice.
 * Sammy Lawrence already had mental problems, due to the pressure put on him by Joey. Susie Campbell was the only reason Sammy remained sane, due to them having a romantic relationship. However, Susie's reaction to her replacement caused Sammy to believe that Bendy was the one who could give Susie back her sanity and free him from the pressure Joey put on him.

Other

 * Bimbo has a great dislike Mickey due to Mickey being more popular.
 * Ashley is an egomaniac, as she often claims to be more beautiful than any other girl in existence, despite the fact that, in the heart of some, there are girls more beautiful than her (I.e Sally in Sonic's heart, Mangle in Foxy's, Alice in Bendy's, and most importantly, Minnie in Mickey's).