EB: What I appreciated the most was the focus on teamwork, because working as a unit made the experience really enjoyable. The Swarm engine is also impressive, even in this early build of the game. It did a great job at rendering the world, but more importantly it was able to churn out unbelievable amounts of zombies on screen to contend with, which just added to the tension that this game offers up. Its due out in 2019, so Ill definitely keep an eye on its progress, because even though its another zombie title, its focus on teamwork and story should help to set it apart from the likes of L4D.
Source: N4G PC World War Z Hands-On Preview: Left 4 Dead With a Plot | Entertainment Buddha