This map is heavily inspired by Episode 4 of The Ultimate Doom, especially E4M1 and E4M6. It was originally made for a project called The Ninth Gate that never saw the light of day.
Most of it was made (on and off) during 2001-03 using DoomCAD (the exit area was built using Doom Builder though). I didn't know you could select multiple linedefs in DoomCAD back then, so I was actually insane enough to manually select each and every linedef, apply the texture and align it. If only I had that kind of patience/time now :)
The map is very straightforward (too straightforward maybe?), so you shouldn't have any problems finding your way. The level music is from Duke Nukem 3D, the other tracks (which are awesome IMO) were composed by Damian Lee.
Note: The lava in the map doesn't hurt, it's used for artistic purposes only.
New level from scratch
Roughly 2 months, during 2001-03
DoomCAD 6.1, ZenNode 1.0.8, XWE Doom Builder (only exit area)