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Call of Duty: Black Ops 4 (stylized as Call of Duty: Black Ops IIII) is a 2018 multiplayer first-person shooter developed by Treyarch and published by Activision. It was released worldwide for Microsoft Windows, PlayStation 4, and Xbox One on October 12, 2018. It is a sequel to the 2015 game Call of Duty: Black Ops III, the fifth entry in the Black Ops sub-series, and the 15th installment in the Call of Duty series overall.