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 features thrilling, dynamic moment-to-moment gameplay and highly variable, customizable action to keep players coming back for more. 

Back 4 Blood includes a four-player cooperative story campaign in which the Cleaners must fight the Ridden and work together to survive increasingly challenging missions. Players can team-up online with drop-in and drop-out co-op to fight the ever-evolving Ridden threat together or play the campaign solo with three AI teammates. The game also features competitive multiplayer in which participants can play with or against friends in online PvP that supports up to eight players and teams take turns playing as both the Cleaners and the horrific Ridden. 

Back 4 Blood can be played online with a squad of four players or solo with up to three AI teammates. The game will also support up to eight players in online PvP (person versus person) multiplayer.

Publisher Warner Bros. Interactive Entertainment and developer Turtle Rock Studios revealed that Back 4 Blood has reached 6 million players.

Warner Bros. Games and Turtle Rock Studios today released a Back 4 Blood post-launch content roadmap detailing various Free Updates and the Annual Pass coming to the first-person co-op zombie shooter this year and beyond. Upcoming Free Updates will include a solo offline mode with campaign progression, new difficulty level, new co-op mode, all-new cards and card type, a holiday seasonal event, and much more. 

The roadmap also highlights the first expansion from the Back 4 Blood Annual Pass, called Tunnels of Terror, which will be available next year. Tunnels of Terror will feature new story content, playable Cleaners and Ridden, activity type, weapons, cards, and exclusive skins, with more information to come at a later date.

The Annual Pass includes Tunnels of Terror and two additional expansions, and is available now for $39.99 (SRP), or as part of the Back 4 Blood Deluxe Edition (digital only) for $89.99 (SRP) and Back 4 Blood Ultimate Edition for $99.99 (SRP).

Here is a full rundown of upcoming free updates:

• Solo Offline Mode with Campaign Progression
• New Supply Lines
• Ridden Practice Area
• Holiday Seasonal Event
• New Difficulty
• New Co-op Mode
• New Card Type
• New Player & Corruption Cards
• Melee Updates
• Quality of Life Improvements
• Bug Fixes

Back 4 Blood's innovative Card System is a new rogue-lite feature that enhances your experience with each playthrough, ensuring every gameplay session is dynamic, intense and feels unique.

Players can easily jump right into the action by choosing a pre-made default deck or dive into the Card System’s vast customisation options to create their own fully personalised deck of cards.

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.

Key Features:

• Cooperative Story Campaign – Fight through a four-player co-op story campaign and work together to survive increasingly challenging missions. Team-up online with drop-in and drop-out co-op to fight the ever-evolving Ridden threat together or play the campaign solo with three A.I. teammates.
• Competitive Multiplayer – Play with friends in the online PvP (player versus player) Swarm mode that supports up to eight players and complements the cooperative campaign elements with its own twist on survival horror, team-based strategy and gut-wrenching action. Become a Cleaner or switch sides and play as the horrific Ridden.
• Customizable Characters and Weapons – Choose from eight playable Cleaners, including Doc, Evangelo, Hoffman, Holly, Jim, Karlee, Mom and Walker, as well as a wide range of lethal weapons and a diverse set of items to better overcome an adapting enemy.
• Extreme Replayability – A new “rogue-lite” Card System enhances your experience with each playthrough, ensuring every gameplay session is dynamic, intense and feels unique. Players can easily jump right into the action by choosing a premade default deck or dive into the system’s vast customization options to create their own fully personalized deck of cards.
• Game Director – Back 4 Blood takes advantage of an adaptive A.I. known as the Game Director, which works behind-thescenes constantly adjusting player actions, ensuring exciting fights, extreme gameplay diversity and tougher legions of Ridden – including mutated boss types up to 20 feet tall.
• Xbox Game Pass – Back 4 Blood will be coming to Xbox Game Pass at launch on Oct. 12 via Xbox Series X|S and Xbox One Consoles, as well as Windows 10 PC.

Back 4 Blood is available for Xbox Series X|S, Xbox One, PS5, PS4 and PC.