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* CompleteMonster:
** ComicBook/TheJoker serves as the OverarchingVillain of the series. When he [[VideoGame/BatmanArkhamOrigins first established himself in Gotham]], he hijacked Black Mask's organization, tortured and murdered innocents and Black Mask's loyal henchmen in a depraved makeshift funhouse, and tried to bomb multiple occupied buildings. Targeting Batman as his [[ArchEnemy nemesis]], he plagued the Caped Crusader for years. In [[VideoGame/BatmanArkhamAsylum one notable instance]], he took over Arkham Asylum and staged a breakout which lead to the mass slaughter of personnel. His end goal was to use his creation, TITAN, to create an army of monsters to unleash upon Gotham. [[BodyHorror Left dying]] of a TITAN overdose in the wake of this incident, Joker [[VideoGame/BatmanArkhamCity forces Batman to find a cure for his condition]] by poisoning as many as two thousand people with his infected blood, and eventually goes on to murder Batman's LoveInterest, Talia al Ghul, right in front of him. Even after his death, flashbacks in ''VideoGame/BatmanArkhamKnight'' further show his depravity, such as his crippling of Barbara Gordon and his horrifying psychical and psychological torture of [[spoiler:Jason Todd]] for over a year in an abandoned wing of Arkham. He ended up breaking [[spoiler:Jason]] so completely, that when he asked him to reveal Batman's identity, [[spoiler: Jason]] began to answer only for Joker to seemingly shoot him dead then send the videotape of events to Batman; while he survived, he was so broken that he became the Arkham Knight. Caring only for himself, the Joker [[BastardBoyfriend abuses his girlfriend]], Harley Quinn, and acts as one of the [[BadBoss worst bosses]] in the series by experimenting on his henchmen, threatening to kill their loved ones, and murdering them for fun. Tie-in material adds to his list of crimes. In ''WesternAnimation/BatmanAssaultOnArkham'', he tries to use a dirty bomb on Gotham City. In the digital comic, ''Arkham City: End Game'', besides trying to foment chaos and [[TakingYouWithMe kill Batman]], we see in flashbacks that on a July 4th he cut the power to Gotham and rigged fireworks with Joker Toxin, killing hundreds. A narcissistic {{sadist}} with a [[AttentionWhore pathological need for attention]], the Joker is determined to make Gotham forever remember him by [[CardCarryingVillain writing his name in the city with blood]].
** The Scarecrow, [[PsychoPsychologist Dr. Jonathan Crane]], is a MadScientist dedicated to the study of fear. First appearing in ''VideoGame/BatmanArkhamAsylum'', he participates in Joker's plan to take over the titular asylum and attempts to MindRape Batman several times with his fear toxin. Upon his final defeat, he threatens to contaminate Gotham's water supply with the toxin simply to spite Batman. Scarecrow returns in ''VideoGame/BatmanArkhamKnight'' as the BigBad. This time around, he takes advantage of the [[EvilPowerVacuum power vacuum created by Joker's death]] and [[VillainTeamUp unites all the remaining villains]] against Batman. After a demonstration of his newest fear toxin causes a diner full of people to rip each other apart, Gotham is evacuated, allowing Scarecrow to take over a chemical plant and manufacture a fear bomb powerful enough to take out the eastern seaboard. He even gleefully speculates that the toxin will carry on the air across the county, creating a "nation of fear." Foiled in this, he steals a superweapon called the Cloudburst and uses it to drive all of Gotham temporarily mad with fear. He also has Barbara Gordon kidnapped and leads Batman to believe that [[spoiler:his toxin caused her to kill herself]]. He then manipulates Commissioner Gordon into betraying Batman, and, after the Commissioner goes against orders and seemingly kills him, Scarecrow [[spoiler:[[ForcedToWatch forces Jim to watch]] as he drops the still-living Barbara off of a building]]. In the end, he captures Batman and forces Gordon to [[spoiler:unmask him]] on live TV. He then plans on letting Batman go [[CruelMercy so he can watch as Gotham is torn apart and everyone he loves is hunted down and killed.]] All of this was done to completely destroy the myth of the Batman as a savior, and force everyone to experience true fear by [[HopeCrusher destroying their symbol of hope]].
%%Do NOT add in any villains without going to the cleanup thread first.
* ContinuityLockout: In two ways.
** Due to being a three/four game story, there are details (Batman and Joker's [[spoiler:Titan Poisoning]] in ''City'', Deathstroke's sudden appearance in ''Knight'') that won't make sense unless you've played the other ones.
** Some plot points require at least some cursory knowledge of the comic books, though the games rectify this somewhat by giving you profiles regarding characters, but still occasionally falls into this trope, particularly in the case of [[spoiler:Jason Todd]], whose presence was almost completely absent until ''Knight''.
* EnsembleDarkhorse: The Arkhamverse version of Harley Quinn is one of the more popular secondary villains, going from a supporting role in the first two games, to being the BigBad of her own [=DLC=], to being fully playable in ''Arkham Knight''. Harley's portrayal in the games also raised to profile of the comics version.
* EscapistCharacter: Batman, as usual.
* EvilIsCool: The villains are usually the most well-written characters featured in each game.
* EvilIsSexy: If you find yourself having the hots for Harley Quinn in this adaptation, you're not the only one.
** Poison Ivy could also count. As well as Candy, Tracey, Shiva, and even Copperhead in ''Arkham Origins''.
* FoeYay: All four games illustrate this in Joker and Batman's relationship. Starting early in ''VideoGame/BatmanArkhamAsylum'' with Joker: "Tell me Bats, what are you really scared of? Failing to save this cesspool of a city? Not finding the Commissioner in time? [[BrainBleach Me, in a thong?!]]" and that the premise of the whole night was a party Joker threw for Batman. Then continuing in ''VideoGame/BatmanArkhamCity'' with the increasing phone calls from Joker to Batman, the [[spoiler: final death scene with Batman carrying Joker out in his arms, and Joker's swan song to Batman.]] Given their beginnings in ''VideoGame/BatmanArkhamOrigins'' when [[spoiler: Joker's obsession with Batman begins, including his Red Hood story and his mention of "meeting someone very special earlier tonight", and another song for Batman during the credits.]] And finally culminating in ''VideoGame/BatmanArkhamKnight'' with [[spoiler: Hallucination!Joker mentioning over and over again being inside of Batman, the heavy indicators that Joker's death affected him so much that he could never return to normal (not even Talia's death is mentioned that much), and the serenade number Hallucination!Joker performed with a little help from Johnny Charisma]]. Catwoman even makes a dig at the relationship in ''Knight'', and how Batman should [[spoiler:stop mourning him and "find new maniacs"]]. The whole VideoGame/BatmanArkhamSeries arguably reads like an overall story of Batman and Joker's relationship.
* FranchiseOriginalSin: While all the games are generally well reviewed and well received, the prominence of the Joker as really the primary bad guy among everyone else has been criticized, as it lead to the detriment of other villains having a chance at truly taking stage. ''Origins'' in particular has a very strong story with or without the Joker being involved, as many fans were excited thinking Black Mask [[RedHerring was going to be a more prominent villain than he was]]. [[spoiler: As it turns out, not even being KilledOffForReal in a franchise where he's explicitly stripped of his JokerImmunity can stop him from being a PosthumousCharacter in ''Harley Quinn's Revenge'' and ''Arkham Knight''.]]
* HarsherInHindsight: How shall we put it? SelfDemonstrating/TheJoker himself has been a DeathSeeker from the very beginning of the series. [[spoiler:In ''Arkham Origins'', he tries to shoot himself in the head in order [[DrivenToSuicide to end it all]], but [[SaveTheVillain Batman stops him from doing so]] for reasons he can't comprehend. In ''Arkham Asylum'', after the Joker says, "I have nothing left to live for," he ''does'' shoot himself, but with a Titan formula gun to the throat. His "suicide" is very painfully slow, as it takes a year for the Titan poisoning to course through his bloodstream before his death and its nature complete their course at the end of ''Arkham City'', in fulfillment of his deserving to die as a monster, all the while Batman is unable to intervene with him.]]
* {{Headscratchers}}: How does the explosive gel not blow up inside of the can when Batman presses the button?
* HilariousInHindsight: Casting Creator/WallyWingert as the voice of Comicbook/TheRiddler, an InsufferableGenius who frequently gloats about being smarter than the people around him, after he voiced the [[PsychoRangers Blue Psycho Ranger]] in ''Series/PowerRangersInSpace'', whose group boasted about being better than the Power Rangers with the Blue one boasting about them being smarter.
** The comments section on Destructoid had a RunningGag about which infamous C-list Batman villains [[SarcasmMode they'd love to see]] in the Arkham games, with the most common target for ridicule being Professor Pyg. Lazlo Valentin would eventually get a sidequest to himself in ''VideoGame/BatmanArkhamKnight''.
** In ''VideoGame/BatmanArkhamOrigins'', Creator/TroyBaker voices a young Joker who seems to use [[ComicBook/TheKillingJoke the Red Hood]] as the preferred branch of his MultipleChoicePast. In ''VideoGame/BatmanArkhamKnight'', [[spoiler: Troy plays the [[AntagonistTitle subtitular Arkham Knight]], later revealed to be Jason Todd, who like in the comics had previously been the second Red Hood]].
*** There's also the fact that Troy's roles in the ''Arkham'' games, along with his roles in ''VideoGame/InjusticeGodsAmongUs'' & the ''LEGO Batman'' games, mean that he's voiced all of the male members of the Bat Family, and a couple of their enemies too.
* SugarWiki/NoProblemWithLicensedGames: Not only are these considered the best ''Batman'' games ever made, not ''only'' are they considered to be among the best licensed games ever made, they're often placed in the top tier of character action games ever made, ''period''. They are arguably the trope's MostTriumphantExample. Related to this is...
* OnlyTheCreatorDoesItRight: Rocksteady studios developed the Arkham IP and did it so well their [[CreatorWorship popularity exploded]]. When ''VideoGame/BatmanArkhamOrigins'' was announced as being developed by Warner Bros. Montreal, essentially a stop-gap game to fill in while Rocksteady had been working on ''VideoGame/BatmanArkhamKnight'', there was genuine concern about how the game would turn out. In something of a subversion the game was received quite well as an expansion of the Arkham universe and having a good story, although having no [[ItsTheSameNowItSucks serious changes to the gameplay]] and [[GoodBadBugs lacking the same polish]] the Rocksteady games had still falls under this trope.
* WhatDoYouMeanItsNotForKids: It's made perfectly clear that this game series was not aimed at children, but that didn't stop kids from purchasing it. The series is full of brutal death, intense violence, psychological horror, sexual content, corruption, and of course Batman and his villains acting more nightmarish than ever before. Unfortunately, there were still some families that thought it was okay to buy for kids simply because it had Batman. Needless to say, people were shocked.
* WTHCastingAgency: This pretty much sums up many fans' reaction to the fact that Commissioner Gordon ''keeps'' getting recast. Across the whole franchise, he's had '''five''' voice actors[[note]]Creator/RickDWasserman voiced a young Gordon in ''Asylum'', but that was TimeShiftedActor[[/note]], going from Creator/TomKane in ''Asylum'', to Creator/DavidKaye in ''City'', to Michael Gough in ''Origins'' and ''Blackgate'', to Chris Cox in ''Assault on Arkham'', to Creator/JonathanBanks in ''Knight''.
** There's also the matter of Creator/TroyBaker and how many different characters he plays- first he's Two Face and Robin in ''City,'' then Joker in ''Origins,'' and '''then''' the Arkham Knight/[[spoiler: Jason Todd]] in ''Knight.'' That's overall five different characters done by one actor, which had several fans aghast.
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