In a [=DnD=] quest this troper is a part of, the two obvious personalities are a rational Paladin, and a beyond-evil Monk, I think. Of course, the moral event horizon is crossed constantly. One part of the quest, we rescued a Governor's daughter and got a ring that grants evil wishes. The other people (minus me, the paladin, and a gnome) proceeded to RAPE the poor girl, then use the ring of evil wishes to TURN HER BACK INTO A VIRGIN IN ORDER TO RAPE HER LIKE SHE WAS NEW.

In this troper's rp, Ein Woe stopped being funny when he cold-bloodedly murdered the brother of his Dragon for failing three times. When the Dragon strikes back, Ein Woe beheads him instantly and says, "I never liked him. After all, I have reserves. Bring me another clone."

This Troper once played a character in an RP who tore out his son's soul from his chest to provide the power source to a humongous, combining mecha whose component parts were named after the four horsemen of the apocalypse. This character eventually became this universe's AnthropomorphicPersonification of greed and kidnapped characters to turn them into superpowered abominations. Despite all this, some people on the forums still wanted to see him leather pants'ed.

In llamasrnice this troper's novel, the square root of negative one divided by zero, the titular equation is a sentient being threatening to DESTROY THE MILKY WAY GALAXY by proving that 0 = any number.

In a SoulEater RP this troper participates in, Abelus, a clone of Asura, just crossed it. He was, at first, very sympathetic and depressed due to knowing what he was created from. He pretty much lost a lot of sympathy when he gave up trying to differentiate himself from Asura and then used his katana to kill the ClingyJealousGirl who liked him to distract an enemy he was fighting so he could defeat her too. And then he finished it up by joining with Arachne and planning an invasion.

This troper's [=WoW=] RP character used to be an ambassador for a notable chunk of a Cthun cult, trying to keep fights with a protagonist order to a minimum. Stroll forward a year or so and you have a psychotic, MPD addled pyromaniac who has equal mastery of dual serrated sabers and engineered technology such as grenades, bombs, cloaking fields, and in one case, genetic engineering. Several elves were tortured, maimed, brutalised, or vivisected, and it all came to a head when his genetically engineered children (a pair of priestesses engineered for energy manipulation) were essentially torn out of their physical bodies and used as infiltrators by possessing key targets. He finally disappeared in a lab explosion following horrifying grafting experiments and a phlebotinum fueled attempt at a protean body for himself in the form of necrodermis (liquid metal).

{{CardCarryingVillain}}s seem to be pretty popular with RPers.

In a GURPS game this troper runs, a secret society attempting to come to power in a military dictatorship crossed this when it kidnapped and experimented on innocent children of every race in an attempt to create psychic super soldiers. Inverted, however, by the actual dictator of said nation, who sort of did a reverse of this when he not only condemned said society, but actively aided the nation he had gone to war with months previously in hunting said society down and bringing its members to justice.

Though he was banned before he could plot the fruition of it, this troper planned to turn his Paladin character into a CompleteMonster of a Deathknight. One of the things he was gonna do? Put a blade right through the chest of his character's brother.

Metrian, a member of the QuirkyMinibossSquad in ThisTroper's unfinished fantasy novel, shot into CompleteMonster status when he destroyed the main characters' hometown with a massive ball of dark magic because he was bored and he wanted to see if he could. His superior was not happy. Metrian doesn't care.

A major villain (though not BigBad) of my game started out first as a BrokenBird, growing up to be a well-meaning protector of the peace and voice of the people. However, with the dark whisperings of her brother and uncle, they tried and eventually succeeded in getting her to go over the edge. What happened? After watching a RichBitch mother hitting her child in public, said villain's attempt to confront the woman was rebuffed and when the villain tried to take her in, the mother smugly reminded her that there would be no meaning regardless. In the villain's mind, it was bad enough to abuse a child, but for the 'wicked' to successfully stand their ground against being brought to justice was unforgivable. Her brother and uncle played on this feeling, convincing her that maybe other aristocrats were like this woman and that an example needed to be made. What example did the villain choose? To trick the abused daughter into offering her mother a glass of acid at the party, and when it was drank, the villain came forward and brutalized the mother physically, taunting her that she could no longer cry out for help because her vocal chords had melted.

If Raize did not cross the MoralEventHorizon on the original play through when he burned down a city just to try to kill a demon responsible for a plague which turned people into demons, or when he killed someone for essentially calling him out for being increasingly ruthless, he crossed it permanently when he up Zero Edge, became the Dark King, and started turning masses of people into undead because the undead are immune to demon magic, thus the "only way to fight the demons on equal ground." [[EvenEvilHasStandards Even Kalein felt Raize was becoming too morally black.]]

In the final installment of a trilogy of stories this troper wrote, the villain crosses the moral event horizon during the final act, as he, after obtaining unlimited power, proceeds to ruthlessly kill his own sister for helping the hero this whole time, which serves as a lead-in to the FinalBattle.

This Troper is trying to write up a series of story arcs based around a valley called 'Maeve', with is in both in the real world and secretly holding an EldritchLocation called 'Dreamescape', a magical world of FreakLabAccidents and must screaming moments. Every story arc will either be set in the 'Dreamescape' or 'Hub' world. The citizens of Maeve are either insane or apathetic at best; in this case, they are DyingLikeAnimals. Each arc has its own set style - leave it to yourselves to find out Where The Hell Is Maeve. The first arc is of the strange murders in Dreamescape as the main character is trying to work along with LaResistance to track down 'Maeven Soldiers', and ItGetsWorse. Its style is somewhat akin to 1902 America (or, ya know, 1960 Ireland.)

Romlus: The first entry of my bad guys. In the first arc, ''Oddity'', he appears as a comforting father figure towards the main character, Benvolio, and keeps the record of the deaths in Maeve and plans their funerals. He starts going downhill when he excludes a young woman from having a funeral because she was pregnant at the time, and even said that ''it didn't count!''. He then manipulates TheCutie into shooting Ben in the face (Don't worry, he was okay afterwards) so Ben chould go into SuperSoldier mode and kill the Maeven Soldiers, and THEN refuses to list/set the funeral for the death of ''his own adoptive son Broga'' because he ''technically'' died outside of Maeve. Later, it's revealed that he was working against The Warren, another CompleteMonster that is up next.

The Warren: A failed SuperSoldier that was made the Warden of the Maeven Prison and also kept a watchful eye on the citizens. Unlike most of the characters who you don't learn are evil till later, The Warren is outright known for villainy. At first, he is petty and AffablyEvil... until we get to the back story of Han, where we see that Warren put Han in prison for accidently breaking a relic inside the church ''when Han was eight years old''. Han was kept in a filthy environment, his 'cell' was pretty much a large canary cage in order to frighten him (he was scared of heights), any inmate who spoke to him got their lips sewn together, and THEN, ten years later, he forced Han to jump off the prison walls into the moat below (in a form of both death row and releasing Han). Han survived and later married The Warren's son as Wells and had a daughter. After discovering this, Warren tries to kill both his own son and his newborn granddaughter. He is killed by having his lips sewn together and being tossed into a river.

Conka: Come on! TheCutie losing it completely? Conka is a seven year old FunnyAnimal that helps clean up the streets at night and lives with Broga and Romlus. After Romlus tricks him into thinking that Ben had killed people, Conka takes a colt gun and shots Ben in the face; after Ben explains that he never killed anyone, Conka went AxeCrazy and tried to stab Peter (the Resistance leader) and started sobbing. He gets a CooldownHug from Ben, and then... he decides to kill Romlus for lying to him so he can have a normal life (it fails). Arc 2, ''Samhain Calling'', is more about the influence Dreamescape can have on Hub, by messing with the human main cast to outright killing them. Its style is more so modern day America or Ireland, parodying slasher films. The main characters are Bills and Jake Grimmly, two nerds trying to create a ''May Day Eve'' festival; unfortunately, their friend Jack accidentally disturbs a portal to Dreamescape, releasing.......

The Seven: A group of supernatural beings created from human souls, similar to May-Eve. The ensemble bad guys of Arc 2.

Namia: Lust. A sex addict that killed her lover shortly after sleeping with him. After using the same tactic many times, she started transforming into a spider-like monster with many arms. In human form, she tries to rape Nighteyes, the young preacher, and later, in spider form, she tries to seduce Bills.

Balute: Wrath. A child that was killed by his parents. In human form, he taunts Jake because he is the younger brother, and also throws stones at Jill. His monster form is of a large newborn duck (Balut is a dish made of a half incubated duck egg), and in monster form he tries to kill everyone at the festival.

Albert: Sloth. Originally, he was grounded for a month during summer break. To pass the time, he decided to sleep and never leave his bed. Unfortunately, he forgot to eat or drink in between snoozes and his heart stopped. His parents tried to keep him alive via a feeding tube and a oxygen machine. But then his body went into massive proportions, crushing the leg and arm he was leaning on and covering him in sores. He appears to Jake in human form (ironicaly a handsome jock) in order to stop him from creating the festival and wants him to join in sleeping for an eternity. He continues to plague the characters through their dreams and actually causes Jack to go into sleeping paralysis. He is the only one of these villians to join the good side.

Ecstacy: Greed. A sado-masochist + Kleptomaniac. Started to cut herself to feel sexual pleasure, and at one point decided to commit suicide by strangulation. She was trapped in a state between life and death and soon constantly started to hoard any form of sexual/valuable item. In human form, she steals Bills' wallet, and in monster form, she tries to strangle Officer Ronald for his gun.

Mamoblub: Gluttony. Possibly a baker. He had pica and found almost anything tasty. He constantly offers the main characters treats like pie. His monster form is a large many-mouthed creature that eats '''EVERYTHING'''.

Sa Kutaro: Envy. An out-of-towner that was part of a poor family. He grew jealous of the other kids and even his baby brother. He became so jealous that he started blaming all his faults on his folks, school, and friends, and even threatened to kill a first grader because she was playing with her teddy. In an attempt to kill Bills, he fell over a building edge and was impaled on a upright javelin that was for display.

Adonphrite: Pride. Thinks of himself as the vision of beauty. TheBlank and somewhat a MadScientist. Spends his time experimenting with the main cast. Looks like a tall thin human with greyish-black skin, similar to The SlenderMan. Goes beyond the horizon when he hacks off the arms of Grey, who looks very similar to him. Arc 3: ''The Sonet of the May-Fly'' revolves around how Maeve was created/found. It parodies psychological horror, with many twists and turns. Set at least 200 years ago, it had the reason for the town's name and how much the real world affected life in Dreamescape and vice versa. Its style is similar to Wild West America.

May-Eve: A character that transcends the various arcs. She was one of the first groups of people who settled in Maeve and was the first to discover Dreamescape. She was proclaimed the mayor of Dreamescape by the residents. She was bullied heavily because of her love for nature and her clumsy walk. One day in Hub, a bully killed her pet canary; she then smashed a potted plant over his head. She later met him in hospital and gave him flowers, trying to patch things up, even serving a two month prison sentence. Unfortunately, the bullies were now tormenting her worse for laughs to see if she'd go psycho again. She then tried her best to do good deeds to win back the affection of the town and her family; sadly, this being a story on insanity, she is actually ''blamed for crimes commited by the Maeven Soldiers, by her own family. No prize for guessing what she did then - murder all of her family, including her little sister, and then torture her bullies with electroshock therapy until their hearts gave out. After killing many people, she runs through the forest and gets caught in a pit of mud (right between Dreamescape and Hub) and is kinda killed. Soon, various birds start to nest on her decaying body and her body started to stretch and grow into plant matter, soon reaching over 42 feet high. She decided not to move because she didn't want to disturb the birds; in Oddity, it is shown that her left leg was big enough to house the upper half of the ElaborateUnderGroundBase, and in Arc 2: Samhain Callings, the part of her in Hub is mentioned to have been surrounded by a public park and becomes the hang-out area for the Arc 2 characters. Arc 4: ''Predicaments regarding the Caninis family'' is a fully Dreamescape story that goes deeper into the myths and legends. Set a year after Arc 2, the many FunnyAnimal residents of Dreamescape start to constantly visit Hub in order to exchange more information about both worlds. The Caninis family enjoys a ridiculously wealthy inheritance and lifestyle. Unlike Arc 1, this part of Dreamescape is actually a chunk of land known as Muadhnait (meaning: Little Noble One); this land is more old-fashioned than Maeve, having a style and class more recognized as Victorian England or Italy rather than 1900-2000's Ireland/America as Maeve was based on. Think of any GothicHorror trope, it will be in Arc 4 and throw in some LovecraftianHorror for more fun!

Grandelder: Most likely the most disgusting being I have ever created. And yet I make him the VillainProtagonist. He owns the Caninis fortune and the small island the manor is built on. At the start, he is in a loving relationship with his wife Evanna, until he starts to become interested in the Maeven/Muadhnait folklore. He was the one who caused May-Eve to become the tree-giant she is now, His wife dies in childbirth, and he decides to create a religion based on all of the myths he gathered (some he created himself) by malipulating an EldritchAbomination. To cut it down: He killed his second wife. He caused his third to believe she had a stillbirth where in reality he had abandoned the baby (Trivia: Peter from Arc 1 was the baby), he kicked his third son out of the house for courting a human woman, disowned his second daughter for marrying a commoner, raped his first daughter and she had twins (the DecoyProtagonist Hick and Broga from Arc 1), he abandoned Broga, he put Hick into an insane asylum because he had autism, and when Hick grew up and got out he (Grandelder) tried to kill him, he killed his four year old grandson for religious reasons, and THEN he tries various times to kill the various characters from the other Arcs and contine torturing the EldritchAbomination into making everything orcording to plan .

Finally......Weaver: TheChessMaster. The MagnificentBastard. The one causing and planning every single move in Maeve and Muadhnait. He caused the portals to Hub and Dreamescape, he created The Seven in Arc 2, the Maeven Soldiers in Arc 1, May-Eve's transformation in Arc 3, and of course, all of the predicaments in Arc 4. Whhhyyyyy you may ask? Beacuse Grandelder told him to. Every ''Weaver's'' goal is to create a world and bend the reality of the world. This Weaver is worshiped as a god of creation in Dreamescape, He changes history only if a person is able to find and speak to him. He is supposed to represent a writer or an artist pressured to change their work. He DOSE NOT want to serve under Grandelder and wants himdead, even if he has to send creatures to do so. Apparently he created Grey from Arc 2 and created Noire and Bianca from Arc 1 and was the being that saved Benvolio in Arc 4. He has done some really bad things that were not of his intention but one might see him as needing puinishment. ''There are other Weavers with their own worlds connected to Earth. This Weaver is the only benevolent one''

This Troper's [unpublished] stories have a lot of villains, but most of them are {{Well Intentioned Extremist}}s (Drathilox, Green Horse & the Trophic Blenders, etc.) or {{Card Carrying Villain}}s who nonetheless have standards (the League of Villains, Bill Stuffner, Will Legal & Ovar Huntin & the Hillbilly Poachers, etc). There are a few {{Complete Monster}}s around (Black Doom & the Black Arms, for instance), but one stands head and shoulders above the rest in terms of sheer ''evil''. This character is Donald Stuffner, the father of the aforementioned Bill Stuffner. Now, Bill Stuffner is rather obsessed with beauty and art, but his main method of making "art" is drain the life out of beautiful maidens and "replace it with art" via a dimension of raw artistic energy dubbed the "Art Flow". The Art Flow is basically raw artistic energy, which for some bizarre reason is highly toxic to those who are unable to tap into it. Needless to say, the heroes of my stories frequently have to remind Bill that "Murder is '''''NOT''''' art!!!!" However, when it comes to comparisons between himself and another artist, Bill's philosophy is "may the best win", and he's willing to accept losses. Furthermore, Bill Stuffner has a great deal of respect for ''all'' other artists, and not only will he refuse to kill them, he will fight to the death to protect them. This chivalrous side keeps Bill Stuffner well away from CompleteMonster status (though he's still a bizarre dude who you do ''not'' want to meet up with. Unless you're an artist. And even then, his antics will probably disgust you... unless you have no soul.) This is ''not'' true of Donald. Donald wants himself and his kin to be the best artists in the world, and is quite willing to kill anyone who's more respected than the Stuffner family to make sure of that. He particularly hates the Round family, who have been the main rivals of the Stuffners throughout history (with the Rounds specializing in the performance arts and the Stuffners sticking to non-performance arts; the Stuffners believe that performance art is too transient to be considered "art", and that it is thusly beneath them.) Thing is, the Rounds have pretty much always been regarded as the better artists. The major reasons for this are that the Rounds are generally nice people (while the Stuffners are typically {{Jerkass}}es at best, and {{serial killer}}s at worst), and that the Stuffners seem to fail hard on the whole "creativity" thing (which wouldn't be so bad if ''they didn't KILL people to compensate for it''.) Anyways, Donald has made numerous attempts to kill off Lucy Roundname is a pun on Lucille Ball, best known for ILoveLucy, the current "heiress" (for lack of a better term) to the Round family name, but all have failed due to Lucy's own capacity for tapping into the Art Flow, the intervention of the Heroes' League (especially her boyfriend, Marcus Belnades), or both. This is where Donald crossed the MoralEventHorizon. Basically, he decided that if he couldn't kill Lucy directly, he'd instead drive her to suicide by '''killing all of her friends and loved ones'''. Needless to say, the Heroes' League was flabbergasted and horrified when they found out about this, and wasted ''no'' time in thwarting the plot. Still, the fact that Donald was all too willing to follow through with his scheme (and would have pulled it off if not for those meddling heroes) single-handedly makes him a CompleteMonster, and this isn't even ''mentioning'' all of the other atrocities he's committed. Even Bill Stuffner - Donald's own son - is regularly disgusted by Donald's antics (and has even intervened to protect Lucy from Donald on numerous occasions), and Donald is doing all of this for Bill's sake! That should speak ''volumes'' about how despicable Donald Stuffner really is...

This troper has written since the age of ten in his spare time, though the time is becoming a lot less easy to find. So naturally he has written a few of these moments in his spare time. He did a small set of short stories featuring a small band of mercenaries left in the ruins of New York, and had one of the mercenaries cross this when they saw a bus full of soldiers and blew it up with a landmine. In a superhero set of stories he had the villain cross it at the very end by pulling a grenade out ''in a school'' and trying to take out ANYTHING with him because he can. And in all my zombie stories, most of my villains cross this very quickly, as does a hero (after they have all they have ever known destroyed, mind.)

In this troper's (unpublished) story, the main character Michelle's cute, friendly, innocent six-year-old imaginary friend and guide through the dream world (ItMakesSenseInContext), whose name is Guinevere crosses it when Michelle finds out her true reason for being there at all. Guinevere claims that Michelle's subconscious brought her there (again, ItMakesSenseInContext), but later on, Michelle discovers that Guinevere is really there because she wants to lead Michelle to her death, which will ultimately cause herself in the real world - who is trapped in a coma due to her mind being absent - to die. Her preferred punishment, however, is a FateWorseThanDeath - she wants to take control of Michelle's body, and do to Michelle what she did to her - [[AndIMustScream lock her in her mind for years and years without letting her out or acknowledging her at all.]] Note: Michelle is 21, and Guinevere is six. Since Guinevere stopped aging when Michelle stopped acknowledging her, this means that she was [[AndIMustScream locked in Michelle's mind for ''15 years.'']] With no one to talk to, and no way of escaping.

One of this troper's characters in his as-of-yet unwritten story crossed the MoralEventHorizon in his backstory, when he returned a hostage he took to the hostage's home country, after infecting said hostage with a potentially genocidal plague, betraying his demonic allies by proclaiming his godhood, taking the human support that the demons received to power himself up, and sparking a war. In the story proper, he primarily crosses the Moral Event Horizon twice - [[FaceHeelTurn except when he doesn't.]]

In my YuGiOh fan-fiction posted here on FanfictionDotNet, I created a character who was not a BigBad, not a Dragon, but simply a member of a QuirkyMinibossSquad--but who managed to be a CompleteMonster who crossed the MoralEventHorizon in another character's back-story. murdered said character's mother and stole her soul to power an EldritchAbomination, then [[MindRape brainwashed the then-six-year-old character and his little sister into becoming his slaves and members of his personal cult]].

Other examples from the same story include:

The BigBad of one story arc crossed the MoralEventHorizon in his back-story by the murders of four main characters' parents via blowing up their airplane in mid-flight.

The above Big Bad's second-in-command crossed it by the main protagonist's grandmother and using her in an attempt to murder him.

Another character who acts as part of a QuirkyMinibossSquad in the story's final arc, and who used to be TheBully to four of the main characters in their collective back-story, crosses the line when threatens to rape his rival's girlfriend, with his dialogue indicating that it wouldn't be the first time he's done such a thing.