Impossible. No other word to describe the game. It is impossible to survive, I do not know if their intention was to make the game as real as possible but I want to tell you that they have not succeeded. Very few changes that should you have to make the game fairly playable, so this is not doomed to failure. The zombies should not run as much as the players. It should not be so easy break a leg while moving. Faint should not more than half of the blood. Born at least with a crowbar or an ax. The zombies can not break your bones and make you faint. That objects do not disappear nor lose the backpack.