Batman: Arkham City is set in the fictional metropolis of Gotham, where the Joker has taken over. The city's walls are now surrounded by a massive enclosure, known as Arkham City, to keep its prisoners contained. Batman must navigate this new and treacherous environment, using his skills and gadgets to take down the Joker's henchmen and stop his nefarious plans.
The gameplay in Batman: Arkham City is an action-packed adventure that combines stealth, strategy, and combat. Players control Batman as he explores the city, completes objectives, and battles against a variety of enemies, including the Joker's goons and other villains from the DC Comics universe. The game features a range of gadgets and abilities, such as grappling hooks, batarangs, and Bat-suits, which can be upgraded and modified to suit Batman's needs.