You control a zombie horde through various mutations (e.g., Overlords, Crawlers, and Tank-like zombies) to bypass human defenses.

Version 1.5.3 fully supports the integrated Level Editor , allowing players to create and share custom maps via the Steam Workshop.

Patch 1.5.3 was a maintenance and final content update following the major "Moon" expansion. It addressed several bugs related to the level editor and refined the zombie AI behavior to prevent "stuck" units in complex geometry.