Activision's Call of Duty first-person shooter video game series is frequently written as COD. It started out in 2003 and was initially specifically alizedialised in World War II-themed games. The series has over the years included games centered around the current era, futuristic realms, and the Cold War. Infinity Ward developed the games initially, followed by Advanced warfare and Sledgehammer Games. Other developers created a number of the spin-off and portable games. On October 28, 2022, Call of Duty: Modern Warfare II, the latest game, was released.