Back 4 Blood is a first-person shooter developed by Turtle Rock Studios and published by Warner Bros. Interactive Entertainment. It was released on October 12, 2021, for Microsoft Windows, PlayStation 4, PlayStation 5, Xbox One, and Xbox Series X/S.
The game was advertised as a spiritual successor to the Left 4 Dead series, although it only has a few members of the team that developed the original game, and carries over several key gameplay pillars, such as a strong emphasis on cooperative teamwork, and an AI system called the "Game Director", which dynamically modifies the environment, placement of enemies, items, and obstacles in response to players' progression and behavior.
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