Call of Duty is a military first-person shooter video game series and media franchise published by Activision, starting in 2003. The games were first developed by Infinity Ward, then by Treyarch and Sledgehammer Games. Several spin-off and handheld games were made by other developers. The most recent, Call of Duty: Black Ops 6, was released on October 25, 2024. The series originally focused on a World War II setting, with Infinity Ward developing Call of Duty (2003) and Call of Duty 2 (2005) and Treyarch developing Call of Duty 3 (2006).
https://en.wikipedia.org/wiki/Call_of_Duty