Day Z is a zombie mod for Armed Assault. Haven't played MP in years but enjoyed this while I played it. You spawn with only a pistol, little food and little bandages (least when I played). Then you scavage towns for supples and better weapons while avoiding or fighting AI zombies. On your way you come across MP players who may or may not be friendly. If you die you have to start a new character. You can play any server and it remembers your characters condition/supplies at last log out.