The controller is a legendary and probably the most feared mutant in the zone. They are a common character in stalker folklore, often described as smarter and more clever than a stalker. The controllers themselves are not that strong, but psychic powers let them create small armies of stalkers and mutants, whom they often eat, without any struggle from the prey. Besides, the simple fact that there is a mutant able to enslave you and your friends does not sound very pleasant. 0.