Back 4 Blood Released

Warner Bros. Games announces the launch of Back 4 Blood, as Left 4 Dead creator Turtle Rock Studios has returned to the co-op zombie shooter genre they helped originate. Here's the Launch Trailer and here are some details:
Developed by Turtle Rock Studios, the award-winning creators of the fan-favorite Left 4 Dead franchise, Back 4 Blood combines a dynamic co-op campaign with thrilling moment-to-moment gameplay and near endless replayability that can be played with up to four friends online. The game also features a unique take on competitive, team-based strategy through the game’s PvP (Player vs. Player) Swarm mode. The Back 4 Blood campaign takes place after a catastrophic outbreak where most of humanity has either been killed or infected by a parasitic Devil Worm. Gamers can play as apocalypse veterans called Cleaners, a group of spirited zombie slayers, as they take on the infected horrors known as the Ridden in their effort to reclaim the world.