Entity 463-A “The Hungering Mutants”

Instances of Entity 463-A are extremely hostile towards living organisms, and will begin chase immediately upon detecting one. These entities have been shown to be solely food motivated and hunt constantly. Mutants can be temporarily distracted with meat, but no other foods can divert the attention of a mutant. Mutants have been observed fighting each other over food, but have never been seen outright killing one another, even during squabbles.

Mutants are often slow, due to each of their limbs varying in size and shape, causing improper balance and lack of footing. Idle mutants move slowly across the Concrete Wastes by ambling or limping, with some resorting to crawling, and have not been observed to have any rest periods. Mutants that have become alerted to the presence of a living person or entity will move faster to pursue their target, with some having demonstrated the ability to sprint or even pounce. Each instance of Entity 463-A is unique, and while some may move inefficiently, others are equipped with dangerously strong limbs. Furthermore, despite most mutants moving slowly due to their asymmetrical limbs, fleeing wanderers often stumble and fall due to the decreased gravity of Level 463, leaving themselves open to becoming overrun by the persistent entities.

The senses of a mutant include any sense available on a person: sight, smell, taste, hearing, and touch. Though it is currently unknown how sharp each of these senses are on a mutant, observations have found that smell seems to be the least effective of them, with hearing as the most vital. Mutants are often drawn towards noise, and commotion from one mutant finding a wanderer will alert other nearby mutants, drawing a dangerous pack. Mutants seem to detect motion more than standalone objects, as remaining still within a mutant's sight when at a safe distance has been proven to allow one to avoid detection.

While research on Level 463, including its entities, has been limited due to its uninhabitabl

Mutants are hostile, sentient entities exclusive to the Concrete Wastes, and are former living organisms that have undergone the effects of exposure to Level 463's radiation. Instances of Entity 463-A are victims that have endured the Concrete Rot to its final stage and have fully transformed into an inhuman creature.

Their appearances vary from specimen to specimen, but the consistent characteristics include coarse green and yellow skin, lines of red eyes, extended mouths lined with spade-like teeth, and an excessive amount of asymmetrical limbs. The torsos of Entity 463-A also vary in size and composure, with many having bent or twisted spines, leading to an almost slug or snake-like appearance. Sizes of mutants can range from approximately three feet to twelve feet in length. Larger mutants, or "well-fed mutants," are rarer, with the median size of mutants being about seven feet in length.

The strength of a mutant scales with their size; a three foot mutant has strength similar to a medium sized dog, a six foot mutant has above average human strength, and a twelve foot mutant is able to easily knock down brick walls. Despite having large mouths, the bite strength of mutants isn't high, though their teeth are able to shred flesh easily once any grip has been established.

Mutants are difficult to kill due to their varying anatomies, as the brain and organs of mutants are generally in different spots, and the amount of limbs each entity possesses limits the ability to demobilize them. Blunt objects are capable of stunning mutants, although their recovery period is short enough to warrant avoiding confrontations altogether.

M.E.G. researchers were able to harvest a small limb from a mutant, which they removed from Level 463 to study. When experimenting with the green flesh of the limb, they found that the flesh had photosynthetic properties, similar to that of a plant. The process by which the radiation of Level 463 can cause an organism to develop photosynthetic