The mummy just stumbles back and forth through the lab, mostly getting in your way, but sometimes helping you.

Mummies can walk across powered floors (whether ‘on’ or ‘off’) and over hurdles, but you can block a mummy by putting something in its path, and they cannot pass through lattices, electrical fences, walls or workbenches.

Mummies may change door directions and can activate switches. If a mummy steps on a touchplate, the corresponding t-door will be lowered. The mummy can only pass through lowered t-doors. Mummies also will not fall into pits, their movements will just be blocked.

The mummies just walk until blocked, then change directions. If Igor or a Helper Robot ‘pushes’ a mummy, the mummy will change direction. Pushing carts, body parts, or cheese into a mummy will not change its direction. Vines and scurries do not change a mummy’s direction other than by simply blocking their forward movement (so they reverse directions).

You (Igor) and the pushers can also turn a mummy, and they can be teleported and travel along conveyors. They can also step on gears.