
Treyarch made one last World War II-based game, World at War (2008), before releasing Black Ops (2010) and subsequently creating the Black Ops sub-series.

Infinity Ward have also developed two games outside of the Modern Warfare sub-series, Ghosts (2013) and Infinite Warfare (2016). The sub-series received a reboot with Modern Warfare in 2019, with Call of Duty: Modern Warfare II released in 2022. Two other entries, Modern Warfare 2 (2009) and Modern Warfare 3 (2011), were made. Call of Duty 4: Modern Warfare (2007) introduced a modern setting, and proved to be the breakthrough title for the series, creating the Modern Warfare sub-series a Modern Warfare remastered version released in 2016. The series originally focused on the World War II setting, with Infinity Ward developing Call of Duty (2003) and Call of Duty 2 (2005) titles in the series and Treyarch developing the Call of Duty 3 (2006). The most recent title, Call of Duty: Modern Warfare II, was released on October 28, 2022. Several spin-off and handheld games were made by other developers.

The games were first developed by Infinity Ward, then by Treyarch and Sledgehammer Games.

Call of Duty is a video game series and media franchise published by Activision, starting in 2003.
