Call of Duty Black Ops is a first-person shooter video game developed by Treyarch and published by Activision. It is the seventh title in the Call of Duty series and It serves as the sequel to Call of Duty World at War.

Set in the 1960s during the Cold War Former Marine Captain and CIA operative Alex Mason, upon interrogation by an unknown party, recounts his violent experiences with the Bay of Pigs, a radical Soviet conspiracy, and the Vietnam war. Alex Mason has to remember the location of a broadcast station, to stop a horrifying biotic weapon attack. During the progress, he begins to suspect the true identity of his Soviet friend-Victor Reznov.

• Call of Duty Black Ops