Mongrelmen are outcasts, unwelcome in normal society. They seem to be a blend of many different races and have a motley appearance, as if patched together from bits of orc, human, bugbear, elf, and other demi-human and humanoid creatures. They are often abused or enslaved. To avoid this they shun human society and form communities of their own kind, living together in deserted or abandoned towns, villages, and ruins. They speak a strange mixture of human tongues and animal noises, though they can usually (90%) make themselves understood in Common.

Mongrelmen are skilled scroungers and pilferers, having the abilities of a thief of level 1d6+5 (except they cannot backstab). In combat, they use a motley assortment of melee weapons, with 1 in 20 having missile weapons (such as darts or blowguns). These missiles will be coated with poison if available.