Dealspwn: "State Of Decay is one of the all-time great zombie games.
This isn't just a generic sandbox with zombies sprinkled in. It's an astonishing simulation that models a group of survivors who band together in the face of the Zed apocalypse; exploring, scavenging, recruiting, creating a new home and permanently dying in an experience that's never the same twice or for any two players.
From random personality clashes to ravening zombie hordes, food shortages and illness, you'll face problems large and small in your attempts to keep your people safe, sane and brains firmly intact. More surprising still, though, it's also fun thanks to satisfying arcadey controls and plenty of action."