Scrub
From KeenWiki
A scrub, as seen in Keen 2.
Scrubs are small red robots that work in the Vorticon Mothership.
It is unknown what functions Scrubs perform, but it is likely they are some sort of maintainence and repair drones, scouring the ship's surfaces to clean and fix any problems found. They are strong enough to support Keen's weight, and will push him out of the way if they encounter him. They are easily destroyed, a single blast being sufficient.
Scrubs can walk on flors, walls and ceilings. When walking on floor, Scrubs always walk left, and when they're walking on ceiling, they always walk right. If they're moving on ceiling and fall, they turn around to face left again. Their moving is thus predictable and their routes are easier to design when building new levels.
