Ogryns are abhumans - descendents of Human populated worlds scattered throughout the Imperium and isolated from the rest of Mankind for millennia.
Ogryns are massive brutes whose immense strength is legendary throughout the Imperium. Ogryns' combat role tends to be as close assault troops where their bulk, determination and considerable lack of imaginations gives them a considerable advantage. They thunder inro the enemy troops smashing the 'little 'uns' to a paste with broad swings of their stocky weapons. They can survive a score of wounds that would fell a normal man and shrug off small-arms fire as if were nothing more than a bothersome sump-fly. Ogryns are dim-witted thugs who respond to any and all threats with overwhelming power and extreme violence, whether it is required or not.