: Developed by Infinity Ward, this series shifted focus to contemporary global conflicts and is famous for the 2007 title Call of Duty 4: Modern Warfare .
: The "roots" of the series, including the original titles and Call of Duty: WWII . Call Of Duty
: Developed by Treyarch, these games often delve into Cold War espionage, sleeper agents, and "mind-bending" narratives. Call of Duty: Black Ops 7 Multiplayer Review : Developed by Infinity Ward, this series shifted
: A survival mode where players fight waves of undead or complete cooperative missions, originally popularized by the Black Ops sub-series. The Three Main Eras : Developed by Infinity Ward
The franchise is primarily divided into distinct sub-series developed by different lead studios:
The franchise typically delivers three distinct gameplay experiences per major release: