Call of Duty: Black Ops 4 (shown as "Call of Duty: Black Ops IIII") is a multiplayer first-person shooter game developed by Treyarch and published by Activision. It was released everywhere around the world on October 12, 2018 for Microsoft Windows, PlayStation 4 and Xbox One. It is the game set after "" (shown as "Call of Duty: Black Ops III"), and it is the 15th installment in the "Call of Duty" game series.