The Undead

AKA: Stenches, Biters, Lurkers, Roamers, Zach

Background: Their only instinct is to feed relentlessly on living organisms - they do not feed to satisfy hunger, and even specimens who have been completely disemboweled will still desire to feed, as long as brain function is present.
While most of the personality of the original victim is gone, there have been instances of the undead seemingly recalling memories of their past lives and performing familiar tasks.