Turtle Rock's Back 4 Blood is a more complex Left 4 Dead spiritual

Original Left 4 Dead developer Turtle Rock evolves the zombie shooter with Back 4 Blood, a four-player co-op action game that includes player progression, perk cards, and new strains of zombies.

Back 4 Blood is left for dead as the developers move on to new project - Gamepur

Left 4 Dead Creators Reveal Concept Art for New Zombie Game, Back 4 Blood - IGN

Back 4 Blood Review

Back 4 Blood Review

Back 4 Blood Will Not Have Left 4 Dead's Versus Campaign and That Sucks

Back 4 Blood Development Blog Highlights Turtle Rock's Vision

Back4Blood Preview: The Good, The Bad, and The Ugly

Back 4 Blood is everything I'd want from a new Left 4 Dead

Back 4 Blood beta: Hands-on with the Left 4 Dead successor that'll transform your evenings

Back 4 Blood review --- Stick with the old, make it feel new — GAMINGTREND

Back 4 Blood Hands-On Preview - The Spiritual Successor to Left 4 Dead

Back4Blood, a spiritual successor for Left 4 Dead made by the original team