Call of Duty: World at War is a 2008 first-person shooter game developed by Treyarch and published by Activision. It is the fifth main installment of the Call of Duty series and is the fourth entry in the series to be set during World War II.

Call of Duty: The Great War is a first person shooter developed by Dark Productions, Treyarch, Ubisoft Montreal and Rockstar San Diego it is published by Activision. It is for PS3, PS4, Xbox 360, Xbox One and Microsoft Windows. This game is set between 1912 and 1920, which is before, during and after World War I.