Only the current version so far — new entries appear as the game ships updates.
Zombies shuffle in slowly. You don't fight them head-on — you just set traps and wait.
Push boxes to block paths. Step on plates to trigger falling rocks. Pull levers to flip platforms. Every mechanism has its use. Your job is to place them right and let the zombies walk into them.
Some levels are simple — one trap does the job. Others need multiple mechanisms linked together: push a box, trigger a trap, drop a heavy object — in that order.
