For a limited time only, buy call of duty: black ops and get the first strike content pack free. $15 value. hear the call of duty once again with this seventh entry in the cod franchise. Call of duty: black ops, inserts players behind enemy lines during the most dangerous time period mankind has ever known. An epic single player campaign filled with heart-racing action, call of duty: black ops puts players in the boots of elite special forces units engaged in covert warfare, deniable operations, and explosive conflicts around the globe.