Call of Duty: Black Ops 4 is the fifteenth main installment in the series. It was developed by Treyarch and published by Activision. The game was released on October 12, 2018. It was the first featured Call of Duty game to ditch single-player campaign game mode, focusing only at the multiplayer aspect of the game. The game also introduced an entirely new battle royale game mode in addition to multiplayer and zombies coop mode.