Orks are a genetically-engineered race of half-animal, half-fungus, warlike, brutish and primitive green-skinned beings. They have spread through the universe like a plague and number in the billions. Their society is a collection of tiny warring empires, divided into tiny warring tribes, mobz, and clans. They are tough, muscular, aggressive and resourceful, plundering technology and bastardising it as best fits their needs. Occasionally, however, the Orks unite en masse in a phenomenon called Waaagh!. When this happens, they wreak havoc on any battefield they fall upon.