- Developer: Primary, Infinity Ward, (2003–present), Treyarch, (2005–present), Sledgehammer Games, (2011–present), Raven Software, (2016–present)
- Genre(s): First-person shooter
- Platform(s): Microsoft Windows, OS X, Nintendo DS, GameCube, Nokia N-Gage, PlayStation 2, PlayStation 3, PlayStation 4, PlayStation 5, PlayStation Portable, PlayStation Vita, Wii, Wii U, Xbox, Xbox 360, Xbox One, Xbox Series X/S, iOS, Android, BlackBerry, J2ME
Call of Duty is a first-person shooter video game franchise published by Activision. Starting out in 2003, it first focused on games set in World War II. Over time, the series has seen games set in the midst of the Cold War, futuristic worlds, and outer space. The games were first developed by Infinity Ward, then also by Treyarch and Sledgehammer Games. Several spin-offs and handheld games were made by other developers. The most recent title, Call of Duty: Vanguard was released on November 5, 2021. The series originally focused on the World War II setting, with Infinity Ward developing the first and second titles in the series and Treyarch developing the third. Call of Duty 4: Modern Warfare introduced a new, modern setting, and proved to be the breakthrough title for the series, creating the Modern Warfare sub-series. The game's legacy also influenced the creation of a remastered version, released in 2016. Two other entries, Modern Warfare 2 and Modern Warfare 3 were made.