MAP31: Skyscrape IV (Claustrophobia 1024)


Claustrophobia 1024 secret maps

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Secret maps

This level occupies the map slot MAP31. For other maps which occupy this slot, see Category:MAP31.

MAP31: Skyscrape IV is the first secret map of Claustrophobia 1024. It was designed by Joonas Äijälä (Jodwin), and uses a MIDI rendition of the music track "Drumhead Pulsation" from Guilty Gear Isuka, sequenced by solis.

This level contains a secret exit leading to MAP32: Oil Rig.


Map of Skyscrape IV
Letters in italics refer to marked spots on the map. Sector, thing, and linedef numbers in boldface are secrets which count toward the end-of-level tally.


Step forward and kill the imps waiting on either side, then walk west to a large door and open it to find zombiemen and imps guarding a chaingun and armor. Open the door in the north-east corner to reach the central hub, then interact with the north door to release a revenant behind you; this alcove contains a switch that will open that door, revealing a Hell knight. Step through the door and kill one or two chaingunners that are revealed, then walk north through another door to enter a room that has a pillar with four more switches on it - each of these switches unlocks a different area, leading to the three keys and the switch that unlocks the exit. They can be pressed in any order (though only one switch can be flipped at a time), but the north switch should be saved for last. Watch out for the arch-vile that teleports in on Ultra-Violence and Nightmare skill levels.

Blue key[edit]

Press the south switch on the column, then go back to the hub to find that a lift has opened in the south-east corner. Activate the lift and kill an imp waiting above, then step off the lift (a chaingunner will be revealed behind you) and follow the passage to a door. Kill a revenant that teleports in, open the door and kill a knight and baron of Hell waiting behind it, then flip the switch in the south-east corner to open another door next to it. Head south through another door to reach a curved ledge with zombies, follow it round and go through another door then turn right to see another switch. Flip this switch then follow the walkway behind you to a second switch; after flipping it, kill the five revenants that appear by the first switch then go over there to collect the blue keycard. Taking the key releases chaingunners behind you and at ground level, and causes an arch-vile to teleport to the central hub.

Red key[edit]

Press the east switch on the column, then leave that room and turn right to see that a door has opened revealing a room with spectres, imps and revenants. Go through the small door in the south-west corner and immediately turn round to flip a switch next to it, then go back into the room to find that the larger door has opened to reveal a spiderdemon. To escape the room you must shoot the dark computer panel next to the spiderdemon, then kill the spectres that teleport in; while you do so, the wall behind the spiderdemon will lower to reveal knights, barons and mancubi that will cause infighting. Once the monsters are clear, flip the switch that has been revealed in the north-east corner to raise the floor underneath you, then flip a second switch on the neighboring ledge to lower a lift by the opposite ledge that will take you up to the red keycard. Flip a third switch on this ledge to reopen the door to the hub, but use caution when you return to the column room as an arch-vile will teleport in.

Yellow key[edit]

Press the west switch on the column, then return to the hub to see that the east door has opened revealing a megaarmor; when you approach it, it will be closed off and two chaingunners will be released behind you. Flip the switch inside their alcove to re-open the wall hiding the megaarmor, then go and pick it up; the floor will rise and take you up to a crate room where numerous imps and zombies will teleport in. Run north and west to a nook containing the yellow keycard and a plasma gun, which you can use to kill the teleporting monsters, then run south and west until you reach another switch that requires the yellow key; flipping it causes revenants, cacodemons and demons to teleport in. Fight your way back to where you found the yellow key and use the lift that has opened to go up to the floor above, then open the west door to get back to the central hub, where two knights have appeared.


Press the north switch on the column, then go back to the hub and flip the switch on the south-west wall to lower a lift under it, which leads back to the chamber adjoining the spiderdemon room. Flip the south switch to open the door next to it, then kill the knight and chaingunners waiting in the next room before pressing the "LOCKED" panel on the back wall. After doing so, flip the switch on the north wall to open the entrance door in the spiderdemon room, then go through that room to get back to the column area; you will be ambushed by shotgun guys, a chaingunner and a baron on the way. Another switch has opened on the east wall that requires all three keys to activate; after flipping it, clear the revenants that appear then go back to the starting point, where the exit door has opened to reveal two arch-viles guarding the switch that leads to MAP16: Nocturnal Abyss.

Secret exit[edit]

Enter the room with the normal exit switch, then go back to the hub and step on the red octagonal platform that has opened in the north-west corner. This platform will take you to MAP32: Oil Rig.

Other points of interest[edit]


There are no official secrets on this map.


Demo files[edit]

Areas / screenshots[edit]


As this level does not contain official secrets, the NM 100S category is redundant.

Routes and tricks[edit]

Current records[edit]

The records for the map at the Doom Speed Demo Archive are:

Run Time Player Date File Notes
UV speed (normal exit)
UV speed (secret exit)
NM speed (normal exit)
NM speed (secret exit)
UV max 7:40.23 Dylan Gill (TheV1perK1ller) 2017-06-08
UV -fast
UV -respawn
UV Tyson
UV pacifist (normal exit)
UV pacifist (secret exit)

The data was last verified in its entirety on December 21, 2021.


Map data[edit]

Things 379
Vertices 8522*
Linedefs 5762
Sidedefs 9921
Sectors 735
* The vertex count without the effect of node building is 5555.


This level contains the following numbers of things per skill level:

Technical information[edit]

Inspiration and development[edit]


The map has Japanese text drawn on the floor in three rooms. In the round center room there is "天削四" written, which literally reads "Skyscrape IV." In the next room to the north there is "司令" on the floor, which reads "control" or "command." In the large room where you fight the spiderdemon, once the lights go out there is "死ネ" written on the floor, which reads "Die!"

See also[edit]


External links[edit]