This game was classified by the community with the following category scores - Violence=3/3, Sex=1/3, Mature Content=3/3. The invasion is coming, and you won't survive on your own! Undead Empire is the first ONLINE 4-player top-down zombie shooter. Up to 4 players can join up to blast away at a seemingly unending swarm of zombies with a taste for human flesh. This co-op twin-stick action survival-horror shooter also includes a robust story mode, a brutal survival mode, and online scoreboards to see how you stack up!