: Cinematic, single-player stories known for scripted "set-piece" moments and memorable characters like Captain Price and Viktor Reznov.

: 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

: The "roots" of the series, including the original titles and Call of Duty: WWII .

: The series' competitive backbone, featuring fast-paced combat across modes like Team Deathmatch, Domination, and Search & Destroy. Recent entries like Black Ops 7 have introduced refined movement systems and flexible matchmaking.

: 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 .