E5M7: Nightmare Underworld (SIGIL)

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SIGIL maps
This level occupies the map slot E5M7. For other maps which occupy this slot, see Category:E5M7.

E5M7: Nightmare Underworld is the seventh map of SIGIL. It was designed by John Romero and uses the music track "Far 5" by Buckethead as well as "Watching You" by James Paddock (Jimmy). The par time defined in the DEHACKED lump is 13:00.


Map of Nightmare Underworld
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.


You start in a hall, facing east. The only way forward is straight ahead. There is a small branch of a hanging catwalk leading south, but currently it leads nowhere. Start your run by moving forward into the cave. The winding path is taking you down to a teleporter. You will be teleported into a closed alcove, facing west. Before you go any further, turn 180 degrees and make a step forward. A door will open, exposing a terrace with some minor monsters (e.g. zombiemen and shotgunners). Take them out and use this vantage point to clear the nearby catwalks and towers of enemies. When you are finished, turn west and drop into the narrow shaft under the hanging corpse.

You fall into a lava pit, so quickly move out of the damaging floor. You are now in a room with a lava stream running through it. There are two patches of light on the floor. One looks like a grey teleporter, and the other one is a fragment of the Icon of Sin flat. This latter patch is a trap: if you step on it, a wall will open up to the north, exposing three windows with imps inside them hidden behind scrolling curtains. Shooting the walls behind the imps will raise the wall in the south of the room, exposing you to an ambush of a shotgunner and a cacodemon (on HMP). You do not need to activate the trap. The path forward is to the west where there is a broken wall. You cannot cross yet, but you are able to see the evil eye on the other side. Shoot it, and a satyr switch will be exposed next to you. Activate it to lower a section of the broken wall. Move forward into the narrow cave, and watch out for the monsters behind every turn. The cave ends in a room on the southern bank of a lava river, where you will find a chaingun. Collect it, then head off to get the red key: exit the room to the east and continue around the building until you see the red key sitting on the ground. When you grab the key, two barons of Hell (three on UV, plus a cyberdemon) spawn in front of you. There is no real reason to fight them now. Run along the wall until you locate the teleporter, which will take you back to the room with the lava stream. Note that there is now a blue armor to collect. Go back down the cave to the lava river, only now turn west, and climb up the narrow path on the rocky wall to the north until you reach a wooden structure. Going around its eastern side will get you to the BFG9000 and some ammo, but be aware that you will be ambushed by a baron on your way back. Going around the western side will bring you to the red door.

Open the door and climb the narrow stairs. Follow the path until you find a satyr switch. Note that as you approach the switch, the inner walls behind you will rise, exposing some lost souls and a cacodemon (HMP). Activate the switch and return downstairs to the red door. A new room has opened up to the north, which has a large hole in the form of a red crater in the middle, surrounded by zombie guards, and a cacodemon in its center (two on UV). Beware that the crater is an inescapable pit should you fall in. Shoot the evil eye visible across the room. This will lower the northern wall, revealing some imps and shotgunners, and a staircase leading downward in the northeast corner of the room. As you reach the stairs, the ledge to the north is lowered, allowing you to ride it up and reach a cave in the northwestern corner of the room with a plasma gun inside. The next area has a lava floor with a narrow bridge crossing to the other side. There is an ambush of cacodemons lurking on both sides of the bridge. You have to cross the bridge, then turn back to shoot the evil eye behind you (northwest). This will lower the wall behind you, revealing the next part of the bridge, with a baron on it. Kill the baron and locate the next evil eye, visible to the northwest when standing at the end of the bridge. Shoot it to open up the way forward.

You are now on a narrow path connecting a series of three watch towers. Each tower also has a hidden teleporter as you exit. The first one takes you to an outpost (the one mentioned in the first paragraph). Use the teleporter in the outpost to return. The second one takes you back to the crater room, where three cacodemons will spawn. You can avoid the fight and any possible damage by using the newly exposed teleporter to return to the tower. As you continue to the third watch tower, two windows in the northern open, exposing you to some fire from the monsters behind them.

The third hidden teleporter takes you to small room that leads to the area behind the windows you saw from the catwalk, with a coffin-like shape on the floor. As soon as you step in, an ambush is triggered. When you are through, head east into the low opening to continue. The opening leads you to a dead end, but there is an evil eye in front. Shoot it and wait for the narrow winding trail to rise. Carefully walk along the path until you reach the opening on the other side. Step into the opening and navigate your way through the maze to a satyr switch, fighting lost souls patrolling the corridors (take the first left, then continue along the left wall until you reach the satyr switch). Activate the switch and step through the doorway back into the 'coffin' room, where you will be met by several cacodemons. There is a satyr switch on the northern wall, which will enable you to climb onto the ramp behind you (where the barred windows are). Run south and down the stairs for the teleporter back to the third watch tower. Continue on the winding trail, and soon you will arrive at the beginning of a canyon with narrow paths along its walls and a lava pit in its middle. A cacodemon and lost souls hide in caves along the southern walls. Carefully move along the northern wall. Should you fall into the lava, the only way out is to run back east to the beginning of the canyon, where part of the rocks will lower to enable you to return to the start. Note that you can only escape this way from the first half of the lava pit, as there is a narrowing about halfway along its length that you cannot fit through.

Once you have managed to negotiate your way through the canyon, you are standing in front an opening to a building. Go in, clear the two shotgunners and turn east to climb a staircase. There are several imps and shotgunners firing at you from the top of the stairs west of you. Be aware that there are two cacodemons in the blood pool (which is an inescapable pit). You have to climb all the way, and use the ledge on the wall to get to the yellow door. Then drop down to the yellow key (you have to be precise, or you will end up in the blood pool). As you collect the yellow key, make a step forward, and a ramp will rise to the east to bridge the gap back to the staircase. Climb back to the yellow door and open it (and beware of the baron waiting right behind it on UV). Cross the exit linedef in front of the image of Baphomet on the wall to finish the level.

Other points of interest[edit]


  1. At the start, open the wall in the northwest corner for shotgun shells and a switch. (sector 501)
  2. The switch in Secret #1 lowers a lift leading to a soul sphere. (sector 505)
  3. Enter the tunnels in the center of the map and go until you reach a cave with a stimpack (not on Ultra-Violence or higher), a green armor, a chainsaw (only on Hey, Not Too Rough or lower), and a box of shotgun shells. You can enter this tunnel complex from the room with lava by examining the broken wall with the cacodemon corpse behind it, just make sure to look back as soon as the path turns to the north. (sector 98)
  4. When you head outside from the tunnels in the center of the map, climb the rocks up, but do not go all the way to the top. When you are at the left side, you can jump through an opening down onto a rocky ledge. Go along this ledge to a cave containing some ammo and a soul sphere (or a backpack on Ultra-Violence or higher). (sector 314)
  5. In the same area as the previous secret, enter the lava which will cause a rock to the east to lower. Ride this rock as it goes up and drop off onto a ledge southwest of that rock. On that ledge, enter the cave to find a box of rockets. (sector 380)
  6. Outside of the central building, at the south side, head west across the lava towards the green armor. Since this secret is in a cave past lava, you will need some protection, so head north from the satyr switch here and collect the invulnerability. Afterwards, head west around the wooden structure and into the cave, waiting for the rock to lower. When it lowers, go across the lava to reach an energy cell pack, a soul sphere, a megaarmor (not on Ultra-Violence or higher), and a computer area map. (sector 817)


There are 2 untextured walls near the eye in the balance section, resulting in a Hall of Mirrors effect.

Demo files[edit]

Areas / screenshots[edit]


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
NM speed
UV max 8:10.77 Bdubzzz 2021-03-24 sig07-810.zip
NM 100S 5:13.00 Jean-Charles Dorne (JCD) 2021-09-06 sig7ns513.zip
UV -fast
UV -respawn 6:35.63 grapes 2023-07-07 sigil07r635.zip
UV Tyson
UV pacifist
NoMo 100S 2:18.03 Thomastd 2021-04-28 sig7os218.zip

The data was last verified in its entirety on July 10, 2023.


Map of E5M7's deathmatch arena

This level includes its own, separate deathmatch arena.

Player spawns[edit]

This arena contains five spawn points:

  1. facing west. (thing 50)
  2. facing south-east. (thing 344)
  3. facing north-east. (thing 345)
  4. facing north-west. (thing 346)
  5. facing east. (thing 379)


The following things (per skill level) are placed in the arena:

Weapons 1-2 3 4-5
Shotgun 5
Chaingun 1
Rocket launcher 1
Plasma gun 1
BFG9000 1
Ammunition 1-2 3 4-5
Box of bullets 1
Box of shotgun shells 1
Box of rockets 1
Energy cell 3
Health & Armor 1-2 3 4-5
Armor 1
Items 1-2 3 4-5
Armor bonus 5
Health bonus 5
Supercharge 1
Backpack 1
Berserk 1
Miscellaneous 1-2 3 4-5
Deathmatch start 5
Teleport landing 1


Map data[edit]

Things 520
Vertices 6151*
Linedefs 5629
Sidedefs 8999
Sectors 837
* The vertex count without the effect of node building is 4777.


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

Technical information[edit]

Inspiration and development[edit]

This map was the first map of SIGIL started by Romero, and it was originally intended to occur as E5M5.[1]


See also[edit]


External links[edit]


  1. Craddock, David (12 April 2019). "Icon of Sin: Doom and the Making of John Romero's Sigil." Shacknews. Retrieved 25 May 2019.