Start the map with
/skill 10;sp bbb
from inside the game.
This is an SP map that started off with a concept of "low tech & high yield",
going for an intense fighting scenario without having to worry too much about
"believability" or "eyecandy", well, this changed - to a degree - over time.
In the end I've now spent quite some time on fine-tuning some of the aspects of this map,
there has been positive feedback that kept me spending time on it.
I guess the map is now complete in a geometric sense.
Maybe some final decor and even monsters and ammo could still make sense;
I'm keeping to the tried and true for now!
Let me know what you think of the monster placement, the end-of-level effect and anything else that you care to comment on.