Batman: Arkham Knight is a 2015 action-adventure game developed by Rocksteady Studios and published by Warner Bros. Interactive Entertainment. Based on the DC Comics superhero Batman, it is the successor to the 2013 video game Batman: Arkham Origins, and the fourth main installment in the Batman: Arkham series. Written by Sefton Hill, Ian Ball and Martin Lancaster, Arkham Knight is inspired by the long-running comic book mythos. Set nine months after the events of 2011's Batman: Arkham City, the game's main storyline follows Batman as he confronts Scarecrow, who has launched an attack on Gotham City, causing a citywide evacuation. Scarecrow, with the help of the mysterious Arkham Knight, is also able to unite Batman's greatest foes in an attempt to finally destroy Batman.