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

MAP31: Cyberden is the first secret map of The Plutonia Experiment. It can be reached via MAP15, and uses the music track "Sign Of Evil" from Doom. The map is named for the four Cyberdemons it contains. They start in visible but inaccessible cages where they can't be hurt or attack the player; throughout the map they will be released. The pre-level text for this level states: You've found the second-hardest level we got. Hope you have a saved game a level or two previous. If not, be prepared to die aplenty. For master Marines only.



Four switches located around the map must be pressed to open the cages releasing the Cyberdemons. Each cage has a switch inside it and when all four are toggled, the yellow key in the center of the map becomes accessible and allows the player to exit. There is only one functioning exit in this level, which leads to the second secret map, MAP32: Go 2 It. There is no normal exit that leads to MAP16: The Omen, so if you previously chose to play this secret map, it'll be mandatory to play the other secret map as well.


  1. In the green marble wall at the south end of the level, climb the stairs and make your way left along the narrow corridor in the back of the room. Approaching the skull switch here opens a room back on the lower floor. There's half of a lion-face on one of the walls in the new room; open it to reveal a teleporter to a secret area.


End of Level Message[]

Betcha wondered just what was the hardest level we had ready for ya? Now you know. No one gets out alive.



The Compet-N records for the map are:

Run Time Player Date File Notes
UV speed 02:45 Adam Williamson 2003-03-26
NM speed 05:18 Drew "stx-Vile" DeVore 2001-11-24
UV max 04:25 Yashar "GeminI" Garibzadeh 1999-01-23
NM100S 05:18 Drew "stx-Vile" DeVore 2001-11-24
UV -fast 05:35 Radek Pecka 2001-08-24
UV -respawn 08:43 Xit Vono 2002-09-15
UV Tyson 37:22 Xit Vono 2003-03-23
UV pacifist 02:45 Adam Williamson 2003-03-26


Map data[]

Things 277
Vertices 1097
Linedefs 1113
Sidedefs 1657
Sectors 159


Monsters ITYTD and HNTR HMP UV and NM
Cyberdemons 4 4 4
Spectres 5 5 5
Demons 7 11 15
Barons of Hell 0 0 2
Arch-Viles 0 1 2
Chaingunners 10 11 13
Revenants 13 20 28
Mancubi 1 2 3
Hell Knights 5 7 6
Powerups ITYTD and HNTR HMP UV and NM
Medikits 15 15 15
Health bonuses 10 10 10
Green armors 1 1 1
Blue armors 1 1 1
Berserks 1 1 1
Weapons ITYTD and HNTR HMP UV and NM
Chainguns 1 1 1
Rocket launchers 1 1 1
Plasma guns 1 1 1
Chainsaws 1 1 1
BFG 9000s 1 1 1
Super shotguns 1 1 1
Ammunition ITYTD and HNTR HMP UV and NM
Bulk Cells 1 1 1
Rocket boxes 55 55 51
Energy cells 2 2 2
Shell boxes 12 12 12
Yellow cards 1 1 1


  • Both of The Plutonia Experiment's unofficial sequel WADs, Plutonia 2 and Plutonia Revisited, adopt the theme of inevitable battles with Cyberdemons in their MAPs31: their secret levels are respectively titled Cybernation and Cyberdemon Vertigo. Unlike "Cyberden" and "Cybernation," however, "Cyberdemon Vertigo" offers a choice between a normal exit (leading to MAP16) and a secret exit (leading to MAP32).

External links[]