MAP31: The Descent (Hell Revealed)

MAP31: The Descent, designed by Yonatan Donner, is the first secret level of Hell Revealed.

Description
According to the Hell Revealed info pack:


 * In this lift you will not be sure if you are descending into hell, or are in hell already. Enemies will fight you all the way down, and there more resistance awaits. You must get the ammunition in the start or you will never survive the descent. And you must be very good to get out alive. Your heartbeat might go very high when you expect the way out to show any moment... You can leave from the normal exit, which requires two keys, or the secret exit, which doesn't require any key. But to leave through it you will need to prove good maneuverability skills.


 * Size: small
 * Difficulty: very hard

Speedrunning
See:
 * Hell Revealed at Compet-N
 * Hell Revealed at the Doom Speed Demos Archive