Rotters were once people of the western territories. They are disfigured shells of their former human selves. Their earthen husks are thin, with rough skin, patched with rock. They possess tiny black eyes and gaping maws lined with teeth. Rotters, also known as leapers, walk and climb on all fours. They use their powerful hind legs to pounce on their prey. Their malformed appendages and hooked claws are excellent to clamp down onto their prey, in hopes of taking a gigantic bite.

Rotters have been observed following a simple animalistic hierarchy. Stronger Rotters are dominant over weaker Rotters. These creatures frequently rely on cannibalism as a food source, forcing weaker Rotters stay on the very fridges of their colony hoping to consume anything they can get a hold of. Larger Rotters reside in the boneyard or closer to their nest built into the east side of Pharon Valley. It has been confirmed that Rotters grow and mutate based on what they consume, so it is possible for Rotters to become stronger with each meal. Worse yet, the prey, whether only injured or slain by a Rotter is likely to turn onto one themselves.