E1M8: Phobos Anomaly (Classic Doom for Doom 3)

E1M8: Phobos Anomaly  is the eighth and final map of Classic Doom for Doom 3 designed by Gareth Ward (Gazz), based off of the original E1M8 by Sandy Petersen and Tom Hall.

Other points of interest
In the right-hand Baron's chamber, there is a hidden switch behind a wall which lowers the lift, letting you back into the rest of the level. This serves little purpose in practice.