Don't get overrun by zombie hordes! Wage war against the undead hordes that want nothing more than to consume all life! Progress through the different environments and defend the last sanctuaries of humanity! Merge your towers and use boosters to bolster your chance of success. Buy squares and place towers on them. Use boosters to enhance your towers. Defeat the hordes and last as long as you can in the progressively harder levels. -Endless -30 unique towers -13 zombie types -5 environments