Today, Saber Interactive has released a new trailer showing off the details and process of the horde in World War Z. This four player cooperative experience will feature hundreds of zombies on the screen at the same time as they will group up and climb walls much like a wave. Powered by Saber’s Swarm Engine, each swarm will feature a dynamic simulation with diverse zombie mechanics and an advanced core system. The game will take place from Moscow to Jerusalem to New York along with a few other places. Players can also use traps and various weapons to out smart the swarms. Check out the video below to get an idea of just how insane World War Z will get.