Set only a year after the events of Arkham Asylum, the game's story begins with Quincy Sharp, the former warden who is now mayor of Gotham City. His plan -- to shut down the asylum, move the inmates to a walled in section of city slums, and hire private security to guard the new borders -- has created a zone of pure lawlessness in the heart of Gotham. It is a city within a city, where inmates are free to roam the streets, stealing and killing as they wish, so long as they do not attempt to escape. Control of this urban wasteland is now contested by two rival gangs: one led by the Joker, with the help of Harley Quinn, the other led by Two Face, who has called for the public execution of Catwoman -- much to the delight of the other bloodthirsty residents. Side-stories involve more of Arkham's most famously devious and demented recidivists, including Mr. Freeze, the Penguin, Poison Ivy, and the Riddler. Kevin Conroy again voices Batman, with Mark Hamill as the Joker.