So if you want some one-shot Zombie action here is what the author has to say:
Ever wanted to play a game that explores the deep personal horror of the zombie apocalypse? Where the choices you make in times of crisis define who you are? Where zombies are only a backdrop and humans are responsible for the true evils in the world?
Well, go find another game! This game is about killing zombies, so you can forget all that touchy feely crap!