The original zombies survival. the more rounds you survive, the harder the game will get.
Buy doors to unlock sections of the map. Buy guns off the wall to defend yourself against the waves of zombies. Get a random gun out of the Lucky Shot. Upgrade your gun at the Exalter. Buy upgrades from the booster machines located around the maps.

Features:
Online co-op and Singleplayer
Global leaderboards
3 Maps
Multiple types of zombies
Upgrades to your player and guns