I found the entrance to a secret Military Base within the waste complex. It is a little out of the way, but it is worth the trouble. I have to clear out these demons.

In March for DOS Game Club we played Doom.

In this video series I casually play through episode 1 on the "Ultra-Violence" skill. No speed-running or UV-Maxing here, just a stroll through the demon-infested Phobos base.