Batman: Arkham City is an action-adventure video game developed by Rocksteady Studios and released in 2011. It is set in a sprawling open-world environment that serves as a prison for Gotham City's most dangerous criminals. Players control Batman as he navigates through the city, battling iconic villains like The Joker and Harley Quinn while uncovering a sinister plot. The game features a mix of combat, stealth, and puzzle-solving elements. Players can explore various locations, complete side missions, and collect hidden items to enhance their abilities. Arkham City received critical acclaim for its engaging story, rich atmosphere, and refined gameplay mechanics.