

The two studios focused on different parts of the game Raven Software designed the Campaign mode while Treyarch developed its Multiplayer and Zombies modes. On August 4, 2020, Activision announced that Treyarch and Raven Software were co-developing the game which would be known as Call of Duty: Black Ops Cold War.

In May 2019, it was reported that Treyarch would take over the Call of Duty 2020 project following tensions between Sledgehammer Games and Raven Software during the development of the game.
