Zombie Fog was an environmental aspect of Plants vs. Zombies Adventures. It was used by the zombies to mask themselves and render the player unaware of what was ahead. Zombie Fog bordered the Player's Town over any lot they had not reclaimed yet from the zombies, as well as the Zombie Paradises. Supposedly, the Fog-a-majig could blow away fog, revealing what lies inside. The player could battle zombies in the Zombie Fog to reclaim lots if they met the requirements to unlock the lot. Some regular levels contained Zombie Fog as an added difficulty.