Call of Duty: Black Ops Cold War is a 2020 first-person shooter video game developed by Treyarch and Raven Software and published by Activision. It was released worldwide on November 13, 2020, for PlayStation 4, PlayStation 5, Windows, Xbox One, and Xbox Series X/S. It serves as the sixth installment in the Black Ops series and the seventeenth installment in the overall Call of Duty series. The game is the second Call of Duty title since 2011's Call of Duty: Modern Warfare 3 to be co-developed by two studios. Black Ops Cold Wars campaign is set during the early 1980s of the Cold War, taking place between Call of Duty: Black Ops (2010) and Call of Duty: Black Ops II (2012) chronologically. It is centered around a pursuit of the alleged Soviet spy Perseus, whose stated goal is to subvert the United States and tilt the balance of power toward the Soviet Union. For the campaign, the player takes control of "Bell", who is recruited by CIA officer Russell Adler into a multinational task force created to hunt down Perseus. The campaign also sees the return of Black Ops characters Alex Mason, Frank Woods, and Jason Hudson, with Mason also being the playable character in certain missions. The game's multiplayer introduced new game modes as well as new map dynamics and elements, carrying over several design choices introduced in Call of Duty: Modern Warfare. It features a seasonal content system similar to Modern Warfare, which includes a battle pass as well as free maps and weapons added every season. Cold War also features narrative tie-ins to Modern Warfare via the campaign and multiplayer, establishing a shared universe across multiple Call of Duty sub-series. The game was originally developed by Raven and Sledgehammer Games and not intended to be an entry in the Black Ops subseries. However, the development suffered from disagreements among the two teams, resulting in Activision placing Treyarch in charge of the game's development in 2019, with Raven acting as a co-developer to them. Marketing for the game began in August 2020 and was done in different forms, including certain content creators receiving slide projectors, puzzles made to be solved online by fans, and a website showcasing historical Cold War events. A public multiplayer beta for the game was also made live in October 2020. Black Ops Cold War received generally favorable reviews from critics, with praise for