The War Z, is an upcoming online zombie shooter MMO, scheduled for Closed Beta in the coming weeks. While most zombie shooters involves players emptying hundreds of bullets into zombie hordes, death should be the norm if this case happens in WarZ.
You see, the game is a tactical zombie shooter, a real survival game where resources (bullets etc) are severely limited and players may have to dodge zombies and avoid detection rather than face them heads-on all the time. A list of the game’s features can be found here.