The Pfhor (pronounced "FOUR") are an alien race of slavers that attacked the UESC Marathon in 2794. The Pfhor are an ancient extraterrestrial space-faring race of alien slavers. They seek to control the galaxy and perform numerous evil deeds in the games. The Pfhor are bipedal, somewhat taller than humans, have three red eyes and grey skin. The arrangement of their eyes was changed from a triangle pointing down in Marathon to a triangle pointing up in the later games.