Not mentioned yet, Reverie MAP31, if you want to max it (I never tried), Odessa_7, Cleimos II MAP16, MAP25, John Landis works such as Eye of the Beholder (E2M3 and the starting area of E2M9 probably were the most confusing) or Strain MAP31. Strain MAP21 if you want to max it... Seven; Symoism and other WADs by this author.