MAP14: City in the Clouds (Hell Revealed)

MAP14: City in the Clouds, designed by Yonatan Donner, is the fourteenth map of Hell Revealed. It uses the music track "Excalibur" from Rise of the Triad.

Description
According to the Hell Revealed info pack:


 * A very tough city level. This level is special in several ways. First of all, I dreamt it. Yes, some parts of this level appeared in my dream and I built them accordingly - only that in my dream, I think I had godmode on :-) The city is floating - you can watch behind the fence, and you'll see the sky. In this area, disconnected from the rest of the world, you will have to pass several guardians to leave, and don't expect an easy fight! My dreams are not friendly! :-)


 * Size: large
 * Difficulty: very hard

Secrets
This teleports you on to the Arachnotron-walls surrounding the central Cyberdemon-area. Which of the walls you are teleported to depends on which side of the teleporter you step in. Step into the teleporter from east, teleporting to the south-west wall. From there straferun to the ledge surrounding the blue-keycard-building. There you find a Green armor and on the opposite side a Computer map. I don´t know how to get there without jumping or noclip...
 * 1) In the building with the blue door go to the large room in the north with the Cyberdemon. A part of the northern wall is a door to a secret compartment with a cell pack and a switch.
 * 2) After the switch in secret #1 is pressed the south-west pillar of the 3x3-pillar-array in the southeast of the level lowers revealing a teleporter.
 * 1) While on the ledge from secret #2 open one section of the northern wall of the building, revealing a Megasphere
 * 2) After grabbing the red key from the H-shaped building in the north you can run over the pillar on the north that contains a Plasma gun
 * 3) The pillar on the light-grey building in the west containing a BFG 9000 counts as secret.

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