FORTRESS.WAD is a single-level PWAD designed by Curtis M. Turner II and originally released April 20, 1994. It distinguished itself at that time by its size, textural consistency, and competent use of linedef tags. The readme file provides no canonical title. Various incarnations of the map appeared on Maximum Doom as FORTNEW.WAD, FORTRES2.WAD, PRISONA2.WAD, E1M6 of NEWDOOM.WAD, MAP15 of DMATCH12.WAD, MAP06 of EP5A2.WAD, MAP08 of EPI2BES2.WAD, MAP06 of FLESHLZ2.WAD, and MAP08 of WADPAK12.WAD. This level should not be confused with Rylan Hilman's "Fortress of Doom" (FORTRESS.WAD).