I've reached Command Control but cannot establish communications with Mars HQ. Fortunately I found a map of the complex, and now know the way to where the anomaly originated.

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.