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 Borderlands: The Handsome Collection. As of March 25, 2015, the game has sold 12 million copies.