Treyarch

Treyarch is an American video game developer based in Santa Monica, California. Founded in 1996, it operates as a subsidiary of Activision and is a core studio within the Call of Duty franchise. The studio is known for creating several installments of the series and for developing the Zombies co-op mode, a recurring feature in many entries.

Among its notable releases are Call of Duty 3 (2006), Call of Duty: World at War (2008), and the Black Ops line starting with Call of Duty: Black Ops (2010) followed by Black Ops II (2012), Black Ops III (2015), Black Ops 4 (2018), and Black Ops Cold War (2020). World at War introduced the Zombies mode, which evolved into a signature element in later titles and helped shape the franchise’s multiplayer and co-op experiences. Treyarch's games are primarily released on major consoles and PC, with ongoing support and post-release content in many cases.

In the broader industry context, Treyarch works alongside other Activision studios to develop mainline Call of Duty titles, providing significant contributions to campaign design, multiplayer systems, and large-scale production. The studio has been involved in refining the franchise’s narrative approach and expanding its online communities, while continuing to iterate on its distinctive collaborative and player-focused features. As part of Activision Blizzard, Treyarch remains a central pillar of the Call of Duty ecosystem and a key driver of the franchise’s evolution.