MAP32: Ossuarium Exoterre (Ancient Aliens)


Ancient Aliens maps
One Last Vision Quest

01 02 03 04 05 06 07 08 09 10

Applied Einstein
You're the Alien Now

19 20 21 22 23 24 25 26 27 28 29 30

This level occupies the map slot MAP32. For other maps which occupy this slot, see Category:MAP32.

MAP32: Ossuarium Exoterre is the second secret map of Ancient Aliens. It was designed by Paul DeBruyne (skillsaw) and uses the music track "Birdsong," composed by Stuart Rynn (stewboy). The par time is 7:30.


Map of Ossuarium Exoterre
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.


Follow the breadcrumbs of weapons and ammo to a small drop. Fall down to be greeted by a glut of enemies: alien guardians sit in the doorways on the left, mancubi occupy the other side, and two archviles are in the corners behind you. Head to the left onto the terrace, and then turn left once more to head down. Be mindful of the various monsters that will appear in the area, including a pocket of cacodemons and alien guardians that open up after you step off the dark stone steps. Make a right and follow the rocky path to a plasma gun guarded by a group of revenants and an archvile that will teleport in after the fact. The steps across hold a megasphere if you need health. Head back to the dark stone steps and walk off the cliff opposite to find the red key, spawning Hell knights, stealth plasma aliens, and revenants.

Head up the stairs directly ahead and use the red key on the door to your left, dealing with more stealth plasma aliens. Walk onto the elevator and turn right at the top to find a path to the blue key. Handle the ambush, being mindful of a sniping arachnotron across the map. Head back the way you came and use the switch in the alcove to your right to open the bars back to the elevator. Go all the way back to the starting vestibule and head through the opposite doorway to a room with arachnotrons and mancubi. Kill them all, then press the switch in the nook across the room to open two areas to the north and south. Deal with more enemies, then use the elevator on the south end to head up to a cliffside.

Here you can go back to the very start if you left ammo or health behind, but if not then you will want to follow the narrow walkway to the yellow key. This will trigger Hell knights to populate the walkway and two arachnotrons on the other side looking down on you. After surviving this fight, walk off the cliff back to the starting area and deal with one more ambush: this time a big group of revenants. Head straight across and up the steps to the yellow door which holds the exit.

Other points of interest[edit]


  1. In the blue key area, you can go through one of the bloodfalls to find a teleporter where you will find medikits and boxes of rockets, as well as an arachnotron (on Hurt Me Plenty or higher) or imps (on lower skill levels). (sector 601)
  2. In the yellow key area, you can straferun through a bloodfall closest to where the key is to find a soul sphere. (sector 690)


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 1:51.60 Billa 2021-12-13 Cross-listed from Pacifist
NM speed
UV max 4:53.14 rd 2017-08-22
NM 100S
UV -fast
UV -respawn
UV Tyson
UV pacifist 1:51.60 Billa 2021-12-13
NoMo 0:53.43 Inuk 2022-12-15
NoMo 100S 0:54.69 Inuk 2023-07-01

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


Map data[edit]

Things 424
Vertices 4097*
Linedefs 4908
Sidedefs 7831
Sectors 786
* The vertex count without the effect of node building is 4097.


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

Technical information[edit]

Inspiration and development[edit]


  • In the comment section under the playthrough of this map on decino's YouTube channel, skillsaw shared the following information about this level:
"[C]ontrary to many people's opinions this map was made specifically for Ancient Aliens. It wasn't a reject from any other project :P

The idea here is that the secret map would have more conventional Doom colors and lean into the gothic hell aesthetic most wads use in their hell levels, which I felt would make the map very distinct in a wad that is otherwise relentlessly neon and sci-fi. Unfortunately, I think the expectation is that the super secret map would lean even more heavily into the Ancient Aliens vibe, which is the exact opposite of what I did, haha.

Anyways, other than ammo being kinda tight, this is a pretty chill map. It's fine but not one of my favorites -- I could easily have doubled up the enemy count for some of the fights. I love the yellow key encounter with the sniper Arachs [sic] and the slow wave of flying bastards [alien guardians] but there's not much else of note here, other than a tricky archvile [sic] or two."
―Paul DeBruyne (skillsaw) [1]

See also[edit]


External links[edit]


  1. Paul DeBruyne (skillsaw) (8 June 2023). "Comment on Ancient Aliens - MAP32: Ossuarium Exoterre (Ultra-Violence 100%)." YouTube. Retrieved 12 June 2023.