1. Call of Duty (2003) The franchise's first game was developed by Infinity Ward and published in 2003. This is the first of many entries in the series focused on World War II, following the steps of other household names like Medal of Honor.

Call of Duty: Black Ops is the seventh installment in the series, the third developed by Treyarch and was published by Activision for release on November 9, 2010. It is the first game in the series to take place during the Cold War and also takes place partially in the Vietnam War.