The game has an eight-person player versus player mode called Swarm, where a team of four players assumes the role of Cleaners, and the other team of four control mutated Ridden. The game features pre-defined hero characters who have preset attributes and abilities, and players can purchase upgrades and items with an in-game currency called Copper. The AI can spawn extra enemies, activate a fog effect, and increase the size of the horde. Along with player cards, the AI Director will also use Corruption cards against the player to hinder their progress.

At the start of each level, players need to build their deck with cards that adjust various elements of gameplay, such as modifying the player's health, damage, and stamina. Teammates are either controlled by other players or AI bots depending on matchmaking preferences and player availability. In the game's primary player versus environment game modes, players join a four-person team of post-apocalypse survivors called Cleaners, who must fight their way through levels populated by zombie-like monsters called The Ridden. The game is considered to be a spiritual successor to the Left 4 Dead series, 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.

It was released on October 12, 2021, for PlayStation 4, PlayStation 5, Windows, Xbox One, and Xbox Series X/S.

Back 4 Blood is a 2021 first-person shooter game developed by Turtle Rock Studios and published by Warner Bros.

Xbox game pass back 4 blood