Back 4 Blood is an upcoming zombie first-person shooter from Turtle Rock Studios, the creators of the Left 4 Dead series. The game will feature a cooperative campaign that can be played with bots or other players online; the game will not be playable at launch without an internet connection. The versus mode will pit a team of 4 survivors against a team of 4 zombies. Similar to Left 4 Dead's A.I. Director, Back 4 Blood's Game Director will modify enemy spawns, item placement, and other variables over the course of a run.
Back 4 Blood features a deck building system that allows players to create custom perk loadouts that modify damage and health regeneration, increase the amount of equipment they can carry, and grant other bonuses.