The first Elder Scrolls - the main quest dungeons were designed individually and had a variety that all later Elder Scroll games, inlcuding Oblivion have not reproduced.
LOL you have got to mean Arena, I still have a spare (old) PC, set up just to play that and Eye of the Beholder series <img src="/ubbthreads/images/graemlins/smile.gif" alt="" />