Pathfinder: Shadow of Chernobyl
The Miracle Machine strips its victim of mind and reason, leaving only an empty, mindless shell. The brainless bodies then turn into zombies, following only the most basic instincts, wandering aimlessly around the Zone without weapons or clothing. Huks are little more than sluggish walking corpses, caring only about food and sleep. They eat and drink just about anything they can get their claws on and they are virtually soaked in magical infusion. Usually they roam the Zone without any apparent purpose, or just lie corpse-like in abandoned buildings. However, as soon as they sense the presence of a human being, they attack immediately. Experienced Pathfinders have learned to avoid them if they can.
It is thought that there are several stages of Husk, from the relatively fresh who can still wield weapons with considerable skill and mimic human sounds to the later stages as they gradually lose mobility and eventually even the ability to use tools.