New Kill All Zombies update include Co-Op and Defend the Vault modes, more perks and interactions commands.

About Kill All Zombies: In the distant future; Arena is thrusting civilians into a sport of survival were a ravenous zombie population is unleashed in the name of sports entertainment with television spectators voting upon how many zombies they want to uncage to make survival all the more harder for you to accomplish with the potential of a collective horde of over 1000 zombies.