Mutant zombies?

Close. It's Mutant Zombies Onslaught, a just released Xbox Live Indie game

A virus sent from the depths of Hell has decimated humanity. Genetic mutations caused by the virus have turned many of those remaining into mindless zombies with dangerous mutant powers. Can you survive the zombie onslaught and save humanity from Armageddon ?

It's hugely expensive at 80 MS points. Yes, 80. That was sarcasm. I think I sneezed up 80 points just yesterday.

There was one important thing I wanted to mention. What was it again?

Oh yeah. FOUR PLAYER COOP! Unfortunately offline only. So... only buy it if you have real, actually, live friends. Hello? Hello? Is that crickets?

There's even a demo available.

Via N4G.