Borderlands 2 is a first-person shooter video game that was developed by Gearbox Software and published by 2K Games. It is the sequel to the 2009 video game Borderlands. The game follows the story of "Vault Hunters" on the planet Pandora, as one of four classes: Salvador The "Gunzerker", Zer0 The "Assassin", Maya The "Siren" or Axton The "Commando". Downloadable content was also released for the game, later being included in a Game of the Year edition. A version for the PlayStation 4 and Xbox One was released with . As of March 25, 2015, the game has sold 12 million copies.