Call of Duty: Black Ops 1 is a 2010 first-person shooter video game. The game was developed by Treyarch, published by Activision,. and released worldwide on November 9, 2010 for Microsoft Windows, PlayStation 3, Xbox 360, and Wii consoles, with a separate version for Nintendo DS developed by n-Space. Announced on April 30, 2010, the game is the seventh installment of the Call of Duty series. It is also the first to be set in the Cold War. It is the third in the series to be developed by Treyarch,. and is the sequel to Call of Duty: World at War. as of May 17, 2016 CALL OF DUTY: BLACK OPS IS NOW BACKWARDS COMPATIBLE ON XBOX ONE. (Now you can Play Black Ops 1 on the XBOX ONE).