This game was classified by the community with the following category scores - Violence=3/3, Sex=0/3, Mature Content=3/3. The latest zombie survival shooter from Krooked Gaming. In single player or up to 4 player co-op, Attack of the Zombie Horde is pure shoot em up action offering Campaign & Survival modes. Unlock new weapons as you progressively battle with a relentless onslaught of undead zombies. The mission: Your elite military unit is left stranded in a remote, frozen wasteland and it’s kill or be killed!