Call of Duty Black Ops is delivered as Steam cd key after your purchase. Call of Duty Black Ops activation and installation is done entirely on Steam. Internet connection is required. Call of Duty Black Ops will take you behind enemy lines as a member of an elite special forces unit engaging in covert warfare, classified operations, and explosive conflicts across the globe. With access to exclusive weaponry and equipment, your actions will tip the balance during the most dangerous time period mankind has ever known. Buy Call of Duty Black Ops.