Play as a 1920s Mafiaso in a budding city reeling from the United States alcohol prohibition of 1920 to 1933.
Not everything is as black and white as they seem, however...
Controls:
WASD / Arrow Keys - Movement
Left click - Fire weapon
Space - Begin game, restart game
You won't survive.
Update (07/22/13) -
* Hitboxes have been significantly shrunken to allow for better navigability for both NPCs and the player.
* Notification messages when you pick up weapons / powerups / insanity bonuses.
* Invulnerability now has a visual cue to let you know when it's active.
Ironically the orange zombies are the easiest to kill for me.
It's the zombies with guns that are a pain. A zombie that can hold a gun at all, but a zombie that can aim that good is fucking ridiculous.