tiefling

thumb|right|Tiefling Fighter (Dungeons & Dragons)|fighter designed by William O'Connor for 4th Edition Dungeons & Dragons. The tiefling ( ) is a fictional humanoid race in the Dungeons & Dragons (D&D) fantasy roleplaying game. Originally introduced in the Planescape campaign setting in the second edition of Advanced Dungeons & Dragons as a player character race for the setting, they became one of the primary races available for player characters in the fourth edition of the game.

In the Planescape setting, where tieflings were introduced, they were described as being a mixture of human and "something else" with the implication that the medium-sized non-human ancestors originated from the evil "lower planes". In further supplements it was clarified that tieflings were usually descended from fiends but not in the same manner as half-fiends, since a tiefling's fiendish ancestry lies further up the family tree. This description remained true in 3rd Edition.