Sledgehammer Games is Developing Call of Duty 2021, Says Activision / Activision Blizzard today confirmed that, as you might suspect, longtime Call of Duty developers Sledgehammer Games is working on this year’s game. We don’t really have any more concrete details, Activision promises that more details on the game are coming “soon.” It’s really not a surprise that Sledgehammer is the developer this time around. The last game they developed was Call of Duty: WW2, and it’s been a few years since then. Usually, these things work on a rotation, with Treyarch and Infinity Ward each having developed a game in the interim since Sledgehammer’s last game. They also collaborated with Raven Software on