The characters go from simple as bums, doctors and gangsters to werewolves, zombies, wrestlers, cannibals, comedians, etc.

Mutators can change the game drastically both for good or for worse.
Zombies everywhere, infinite ammo for everyone, fog of war, endless runs, all levels have random features instead of being themed, everyone has 70% less max health (including the player).

You can play the game with friends.