This latest trailer from Deep Silver games was showcased at E3 2011. We can see a bit of the story in this trailer as the user seems to enjoys himself getting drunk meanwhile things start going blurry around him. The zombie outbreak occurs at this exact moment while the user is lying drunk in his bed.
The next morning when the user wakes up, he finds himself facing the zombie apocalypse. It is like a perfect paradise night gone wrong the next day. This game is a first person shooter with strong focus on melee combat rather then shooting. Seems like that the ammo will be very rare in the game.