High Quality Content by WIKIPEDIA articles! In the Dungeons & Dragons fantasy role-playing game, Demogorgon is a powerful demon prince. He is known as the Prince of Demons, a self-proclaimed title he holds by virtue of his power and influence; which in turn, is a title acknowledged by both mortals and his fellow demons. Demogorgon was also named as one of the greatest villains in D&D history by the final issue of Dragon.