The Narco-tribes of Footfall are blood descendants of men and woman brought back from worlds within the Koronus Expanse, mingled with the blood of those who have come to Footfall from the Calixis Sector. The culture and traditions of the narco-tribes are a feral melting pot of strange drugs, heathen rituals, and violent contests of fighting skill. Narco-tribe drugs affect perception and memory; many narco-tribesmen live all their life in a world removed from reality, and are dangerously unpredictable. Each nacro-tribe is distinguished by the patterns of scars made of hot brands on the faces of tribesmen. There is great rivalry between narco-tribes of different skin-brands, and violence and bloody vendetta are common between them.