Developer Turtle Rock's Back 4 Blood is very much what its title alludes to -- a spiritual sequel to Left 4 Dead. Which Turtle Rock developed in partnership with Valve. With Back 4 Blood's release date now set for October 12, a newly released video outlines the title's in-depth card system.

Which are played by both the "Game Director" (that is the name given to the classic AI-driven variation found in each run) and players. Game Director cards can range from armoured zombies to time-limits and other modifiers, with player cards feeling more like RPG-like passive effects -- things like increased healing, recovering ammo, and other co-op like effects.

Check it out.

Back 4 Blood is a first-person co-op zombie shooter from the creators of the critically acclaimed Left 4 Dead franchise and features thrilling, dynamic moment-to-moment gameplay and highly variable, customisable action to keep players coming back for more. The Back 4 Blood story takes place after a catastrophic outbreak where most of humanity has either been killed or infected by the parasitic Devil Worm. Hardened by unspeakable events and emboldened to fight for the last of humanity, a group of apocalypse veterans called the Cleaners have rallied to take on the infected horrors known as the Ridden and reclaim the world.

Back 4 Blood takes advantage of an adaptive A.I. known as the Game Director, which works behind-the-scenes monitoring the actions, health, and choices of players. It responds accordingly by changing environmental conditions, adding obstacles, and unleashing special Ridden mutations through Card System modifiers known as Corruption Cards. Players can change up the gameplay by utilising specific cards to strategise against the Game Director, from amplifying equipment to reloading weapons, as they take on hordes of enemies in their path.

It all adds a dose of strategy when tackling each stage or section, with players choosing cards based on a hand dealt. Back 4 Blood is out for Xbox Series X|S, Xbox One, PlayStation 5, PlayStation 4, and PC on October 12, 2021.