Batman: Arkham Knight is a 2015 action-adventure video 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 one year 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.