Batman: Arkham is a series of action-adventure video games based on the DC Comics character Batman, developed by Rocksteady Studios and Warner Bros. Games Montréal, and published by Warner Bros. Interactive Entertainment. The first game, Batman: Arkham Asylum (2009), focuses on Batman trying to prevent Joker from destroying Gotham City after he takes control of Arkham Asylum. The second game, Arkham City (2011), is set a year later, after Hugo Strange expands Arkham into a massive super-prison enclosing a dilapidated segment of Gotham City; Batman is incarcerated and must uncover the secret behind Strange's sinister scheme, "Protocol 10". Arkham Origins (2013) is a prequel set years before the events of Arkham Asylum in which a younger and less-refined Batman must deal with a bounty that has been placed on him by crime lord Black Mask and has lured eight deadly assassins to Gotham on Christmas Eve. The next and final Rocksteady installment, Batman: Arkham Knight, is scheduled to be released in 2015 and is set one year after the events of Arkham City. It features Scarecrow as the main villain and a mysterious new foe, called the Arkham Knight.