If you’ve sunk dozens, or more likely hundreds, of hours into those old classic zombie survival adventures, then Back 4 Blood will be a welcome breath of fresh air in a space that really hasn’t had any comparable games. It has a few minor tweaks to the gameplay here and there, many improvements to gameplay and progression, and the obvious technical and graphical upgrades that the new generation of hardware affords. In all the important ways, Back 4 Bloodis the co-op zombie shooter that fans have been waiting for since Left 4 Dead 2.