Complete Monster/Batman Arkham Series

As one would expect from a Batman video game series, the Caped Crusader's foes run all over the morality spectrum from tragic Anti-Villains to amoral assholes to well-meaning yet destructive visionaries and everywhere in between. And of course, there are outright repulsive monsters that are in a class of their own.


 * Surprising pretty much no one, The Joker is naturally one of these, committing one atrocity after another throughout the games while cackling madly and cracking jokes at the same time.
 * During his first canonical appearance in Batman: Arkham Origins
 * During the events of Batman: Arkham Asylum he ends up letting lose all the dangerous psychopaths and sadistic Blackgate prisoners locked up in the Asylum and traps the staff there, causing most of the guards, doctors, and other innocent civilians to be brutally murdered by all the escaped crazies which would ultimately put all of their blood on his hands. His plan in the game is to Throughout the night it's revealed that he had Bane set up to be tortured and have his powerful drug Venom forcibly siphoned out of his body in order to assist with the Titan, he talks freely about being abusive towards his loyal and lovestruck henchwoman Harley Quinn and offers to let his men rape her as a prize for bringing in Batman,  It's also worth noting that his Bad Boss tendencies really show in this game, as he has multiple moments where he could alert his mooks to Batman's presence whenever they can't see him, but simply finds it funnier to sit back and watch them all get the stuffing beat out of them. Hell, he even leaves a couple of his henchmen to die in rooms filled with Joker Toxin simply for not escaping fast enough.
 * And in Batman: Arkham City, he realizes that he's dying due to Titan poisoning and decides have samples of his poisoned blood shipped to Gotham's hospitals which would end up putting thousands of lives at stake, and poisons Batman as well by putting some of his blood in him so he can take the Caped Crusader down with him should he not find a cure in time. It's been revealed that in order to find a cure, he's been having doctors kidnapped and dragged over to his headquarters and has been punishing them for their failures by brutally executing them until and ends the night's festivities by  It's also worth noting that most of his henchmen are absolutely thrilled by the fact that he could possibly die due to his sickness because they're all sick of working for an unpredictable lunatic who is not only intolerant of failure, but also big on killing mooks of his out of the blue for his own amusement!
 * In Arkham City, if Joker hadn't had such a monopoly on the title of Complete Monster, Oswald Cobblepot a.k.a the Penguin would have it since he is also a truly vile man. While the guy is mostly a ruthless, though polite and occasionally helpful enemy of Batman in the comics, this version of him is a nasty, sadistic, and all around disgusting murderer and torturer. All around his museum hideout are display cases where he leaves the corpses of his victims in, and they all have recorded messages that go into detail about how he killed them and why he did it. While it may not seem like a big deal due to a lot of them being criminals, it's hard to say that they really deserve to die in such awful ways like being baked in a hot oven or being worked on with crowbars and blowtorches. And Penguin just doesn't have rivals to his criminal empire or street thugs who got on his bad side on display, he also has Mr. Freeze subjected to this fate and has plans to do this to Bruce Wayne who for all he knows is simply a rich boy who's ancestors were more successful than his! And Mr. Freeze's situation isn't any better due to the fact that he's alive in his display case, but it's also a customized one that acts as a microwave to roast the poor guy alive in, which is a needlessly sadistic way to make sure that Freeze can't be used by his dying rival Joker as a means to cure his terminal illness! And if Penguin's case couldn't be made any worse, he's also a cop killer and has a group of undercover cops subjected to fates such as being drowned, fed to his pet shark Tiny, and being left to slowly freeze to death. And just in case you didn't hate the little Fat Bastard enough, right before the boss fights with him and he ends up torturing a cop over the museum's intercom by freezing his hand with Freeze's gun and shattering it off with a hammer all the while laughing at his screams and describing the pain that he's putting the guy through. Not to mention that like with the Joker, Penguin is also a Bad Boss extraordinaire who constantly threatens his lackeys with a slow death should they fail him, and goes as far as to laugh at a group of henchmen he stranded on Joker's territory through blowing up several bridges while claiming that their fates aren't his problem.
 * Also from Arkham City, Professor Hugo Strange is a different sort of monster compared to the Joker and the Penguin. While those two love to kill for fun, Hugo Strange is a perfect example of a Knight Templar who goes to horrific extents in order to accomplish his goals. A psychiatrist with an unhealthy obsession with punishing the wicked and wanting to become Batman's successor as Gotham's savior, Strange approached Arkham Asylum warden Quincy Sharp and agreed to help him win the election for mayor of Gotham City through his "friends in high places", on the condition that Quincy had to look the other way while he had free reign at Arkham Asylum. Taking in interest in inmate Jervis Tetch's (also known as the Mad Hatter) hypnotism skills, he took advantage of the mentally ill man and had him help out in , and rewarded Tetch by giving him "Alices" (innocent assistants) that Tetch would kill and quite possibly rape. After Sharp won the election and became mayor he ended up allowing Strange to set up Arkham City, which he would basically wall off a section of Gotham and use it as an enormous prison in which to toss in any of Gotham's criminals whether they belong in Arkham or Blackgate Prison and have them live in awful living conditions while they tear each other apart. While some may argue that the criminals who end up in Arkham City deserve it, Strange also has innocent people who oppose his views tossed into the city as well, leaving them to fend for themselves against the various terrifying murderers, rapists, and cannibals who are far more deserving of prison time. And while he appears to treat his TYGER guards well, they are actually brainwashed slaves who were made loyal to Strange through hypnotism and torture methods such as electroshock therapy, and any who resisted the brainwashing were forcibly lobotomized and tossed into Arkham Asylum's holding cells where they were now reduced to animalistic, screaming savages that had no resemblance of human thought anymore. And to top it all off, he decided to proceed with the very controversial "Protocol Ten" which And even worse, he reveals that he has plans to establish these kinds of facilities in other areas such as Metropolis and Keystone City as well! While  thinks this is a necessary thing to do in order to make the world a better place, Strange is clearly obsessed with his psychotic ego and wants to be figuratively immortalized in history for his actions and doesn't care at all about trampling anyone who gets in the way of his lust for fame, and shows absolutely no regret whatsoever when Batman forces him to watch the carnage that is caused by Protocol 10, claiming that it's a beautiful sight to behold.
 * From the Batman: Arkham Origins DLC Cold, Cold Heart, we have Ferris Boyle who is even worse than he was in the award winning Batman: The Animated Series episode Heart of Ice from which this DLC is based off of. While appearing to be a kind-hearted philanthropist on the surface, Boyle is really an unethical sociopath who is using his company's legitimate businesses as a front while secretly developing dangerous and highly illegal cryogenic weaponry to be sold on the black market. Hiring the meek cryogenist Victor Fries to do the job for him, he agreed to provide funding for curing Victor's Ill Girl wife Nora's terminal disease. However, Boyle had no intention of actually keeping his word which Fries found out and instead decided to find a cure for Nora himself. When he found this out, Boyle was furious and decided to confiscate Nora and tried to beat Fries to death despite the fact that Fries was still helping make weapons for him! After beating Fries nearly to death, Boyle tried to finish him off with a cryogenic weapon, but instead caused the accident that permanently disfigured Fries and made it to where he can't survive outside of sub-zero temperatures. Having caught other members of his staff in the blast, Boyle decided to leave them all to die in an attempt to cover his ass, which backfired spectacularly when Fries survived and came after him decked out in power armor and a cryo-cannon as the newly christened villain Mr. Freeze. At the DLC's climax when Batman has defeated Mr. Freeze and saves Boyle from his wrath, the slimy bastard decides to freeze Batman and leave him to his death due to him finding out the truth behind Boyle, then proceeds to brutally beat Mr. Freeze to death while telling him that he'd keep him alive long enough so he could force him to watch his wife die. While Boyle was already a monster in the original episode, he's much worse here thanks to his sadistic streak and is treated as this DLC's villain with Freeze treated even more sympathetically while he was more of a major Asshole Victim in the animated series with Freeze being the main antagonist.
 * Victor Zsasz from the first two games is a creepy little man who is obsessed with killing innocent people and slashes a tally-mark onto his skin for every life he takes. While Batman is able to stop most of his crimes before Zsasz can add more tallies to his skin, the intention is still present in the horrifying ways he tries to kill people. In the first game, you first find him having escaped captivity torturing a security guard with electric shocks, creepily threatening to fry him if Batman intervenes. Later on, he's holding at knife-point while taking what's heavily hinted to be sexual pleasure from the thought of ending her life. He's also been to work on other victims as you can find a couple of groups of dead Arkham staff members who are posed in life-like situations. In the second game, he's one of the inmates stuck in Arkham City and spends his time calling various phone booths around the city, where he kills them if they pick up and answer. With Batman however, he makes him run all around the city looking for various phones to call with three hostage's lives on the line should he fail. Here, he tries to justify himself through discussing his Freudian Excuse by talking about how he found that life is meaningless due to losing his parents and squandering away his fortune by gambling, and that he's trying to save people by "liberating" them from their perceived pointless existences. However, upon entering his hideout it's very clear that he really does take a sick pleasure in this due to the fact that he's menacing two of his hostages and creepily telling them about how slowly he's going to kill them, and has already killed the third hostage despite telling Batman that he wouldn't if Batman didn't take too long. While not one of Batman's bigger foes in the series, he's still among the most terrifying.