The spiritual successor to Left 4 Dead Back 4 Blood has been officially delayed to October 12th, 2021 due to development issues. pic.twitter.com/Mv2i9HLIwo — Back 4 Blood (@back4blood) March 25, 2021 Turtle Rock Studios made the announcement public today but assured fans the open beta will still happen this Summer 2021. For those unaware, Back 4 Blood is a cooperative action-adventure title where 4 players attempt to survive a new infection that has turned humanity into zombie creatures. Players can play the game with 3 friends in cooperative mode or in PvP with 4 other players taking over the infected. Back 4 Blood launches this October 12th for Xbox One, Xbox Series, PS5, PS4, and PC.