Batman Arkham Asylum is an action role-playing game for the Xbox 360. It is developed by Rocksteady and published by Warner Bros. Interactive Entertainment. The game is based on the DC Comics character Batman and the Arkham Asylum series of comics and games. The game is a spin-off of the Arkham series, and is the first game in the series to be released in North America. The game is set in the fictional city of Arkham Asylum, and follows the adventures of the character Batman. It introduces new characters, such as the Scarecrow, the Black Canary, and Catwoman, and introduces a number of new gameplay mechanics, such as the Batmobile and the Arkham Asylum's security systems. The game was released in North America on November 15, 2009, and was met with positive reviews. It sold over two million copies and was met with critical acclaim.