Call of Duty: Black Ops is a 2010 first-person shooter video game developed by Treyarch and published by Activision. It was released worldwide in November 2010 for Microsoft Windows, the PlayStation 3 Xbox 360 and Wii with a separate version for Nintendo DS developed by n-Space Aspyr later released the game for OS X in September 2012 It is the seventh title in the Call of Duty series and the third to be developed by Treyarch. It serves as the sequel to Call of Duty: World at War