Mutants

Mutants are non-human creatures that were likely created is a result of the radiation. Many of them do originate from humans, however.

Ghouls
Ghouls mostly walk around aimlessly with no purpose. They can be any sort of creature that’s been crippled by radiation. Most commonly they have no animal like appearance. There are rare cases of them trying to communicate with humans, and some believe it's them calling for help.

Devils
The devil is the most deadly of all mutants, most people who have came into contact with one haven’t made it out alive. The few that have have been scarred for life, either through wounds, or they went insane. Devils can live in packs led by an alpha devil. They live in nests which can go deep underground that are lead by an Alpha Devil. Their speed and strength is unmatched by almost every other mutant to exist.

Vesps
A mutant that stays in caves, subways, sewers, and mineshafts during the day to avoid the sunlight. These mutants use their claws to climb on the walls and ceilings to hunt their prey. They have thermal imaging in their skull that allows them to easily identify prey. Primary threats are their claws and razor sharp teeth.