Overkill's The Walking Dead  (Code in the Box - for PC)

OVERKILL’s The Walking Dead is an action-filled four-player co-op multiplayer first-person shooter set in Washington, D.C. after an outbreak brought the dead back to life. In this test of skill, strategy and teamwork players will band together with up to three friends on a variety of missions, securing supplies as well as survivors to strengthen their camp against the threat of both the dead and the living - by any means necessary.