Without a doubt, it’s hard to play World War Z without comparing it to Valve’s Left 4 Dead series. Many of the similarities are here but Saber Interactive decided to take to those concepts and flesh them out. Adding a leveling system and a larger variety of competitive options. It’s a cooperative shooter with lots of things to kill and while that may sound mediocre it’s done so well here. World War Z is all about mindless carnage as you plow through another wave of zombies.