Descending into the Abyss. accomplishments of Ultima Underworld: The Stygian Abyss.55. intro in the manual that explains that the boy. The Stygian Abyss Refer nce Car d 174 Movement 176. ROM manual and printouts for mor e infor mation. Ultima Underworld. READ ME FIRS -I! ELECTRONIC ARTS PRESENTS CD-ROM CLASSICS. THE STYGIAN ABYSS. Type origin and press Ii ENTER II to begin installation for Ultima Underworld …. Product Support Bulletin. Ultima Underworld is started by typing UW. 5. CD Version "Underworld - The Stygian Abyss" Ok 6. ULTIMA UNDERWORLD II The thrilling sequel to Computer Gaming World's Role-Playing Game of the Year! UNDERWORLD ® II: LABYRINTH OF WORLDS TM.