Buy Back 4 Blood: Ultimate Edition and get:Base Game 4 days Early Access to Back 4 Blood Annual Pass: Three upcoming downloadable content drops with New Story, Playable Characters, Special Mutated Ridden, and more 4 Character Battle Hardened Skin Pack Additional digital in-game items: Rare Banner, Emblem, Spray, TitleBack 4 Blood is a thrilling cooperative first-person shooter from the creators of the critically acclaimed Left 4 Dead franchise. You are at the center of a war against the Ridden. With humanity's extinction on the line, it's up to you and your friends to take the fight to the enemy, eradicate the Ridden and reclaim the world.Cooperative CampaignFight your way through a dynamic, perilous world in a 4-player co-op story campaign where you must work together to survive increasingly challenging missions. Play with up to 3 of your friends online or go solo and lead your team in battle.Choose from 8 customizable Cleaners, one of the immune survivors, and a range of lethal weapons and items. Strategize against an ever-evolving enemy bent on your total destruction.Competitive MultiplayerPlay with or against friends in PVP. Switch between playing as a Cleaner with special perks and the horrific Ridden. Both sides come with unique weapons, abilities, and specialties. Extreme ReplayabilityA new "rogue-lite" Card System creates different experiences each and every time, putting you in control to craft custom decks, roll different builds and undertake more demanding fights. The Game Director is constantly adjusting to player actions, ensuring exciting fights, extreme gameplay diversity, and tougher legions of Ridden - including mutated boss types up to 20 feet tall. Xbox Live account required to download and install.