Doomed Speed Demos Archive
http://www.doomworld.com/sda/doom_sda.htm

Pwad:      vrgl_3t.wad
Pwad name: 3-Tech
Map:       16
Skill:     4
Category:  UV 100/100
Exe:       MBF
Time:      4:31
Author:    Adam Hegyi
Email:     ha211@hszk.bme.hu

Comments:

A very nice looking tech map with excellent
gameplay. It's pretty linear, but very good at
that. The enemy supply never runs out, providing
challenging and fun gameplay from the first second
right till the last showdown with the cyberdemon.

Hopefully you'll discover that from my demo and
play the map yourself :-)