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This level occupies the map slot MAP17. For other maps which occupy this slot, see Category:MAP17.

MAP17: House of Thorn is the seventeenth level of Memento Mori. It was designed by Eric Sambach, and uses the music track "Dreadnaught" by Mark Klem.


MM MAP17 map

Map of MAP17

Letters in italics refer to marked spots on the map. Sector numbers in boldface are secrets which count toward the end-of-level tally.

Other points of interest[]

The megaspheres in the dungeon at the very northwest of the map seem to be reachable on multiplayer mode only, but can be collected in single-player mode too.

There are six skull switches, therefore abbreviated by S and numbered from (left) south to (right) north. On entering that dungeon you are facing the two central switches (S#3 and S#4). Each switch lowers a lift of the "stairs" with an item on it. Be fast, as the lifts stay lowered just for short while. Push S#3 (to lower the lift in front of S#6), S#4 and S#6 (from the lowered lift - simply push the wall below it to lower the lift in front of S#2). Run to the lowered lift in front of S#1 and step over on the lift in front of S#2. No need to hurry anymore, wait for the lift to raise. S#2 lowers the lift with the northern megasphere, so it is pretty useless for you. So instead step on the banister south of the lift you are on and walk over to the southern megasphere.

Do the same procedure again mirror-inverted to get the northern megasphere.



  1. Inside the dungeon you start the level in, the southwestern cellar contains a lantern on a wall; shoot this wall to reveal a box of shotgun shells (sector 173).
  2. When the elevator west of the dungeon is lowered, the southeastern wall can be walked through, leading into a compartment (sector 309) containing a soul sphere.
  3. The sector containing the switch (sector 316) in secret #2 that lowers the elevator is also marked as secret. However, it is impossible to register due to being too small for the player to enter.
  4. Upon leaving the elevator, enter the marble room in the northeast of the house and press on the demonic face at the south. It will open a portion of the eastern wall (sector 253) to reveal a blur artifact.
  5. In the library where the blue keycard resides, press on the bookcase west of the couch. It will unveil a secret room (sector 113) behind the desk containing two chaingunners, (a backpack on easy and medium skill levels,) a shotgun, a chaingun and a super shotgun.
  6. After descending either elevator in the stone area following the yellow key door, the wall east of the eastern torch is covered in muck. Press on this wall and the platform (sector 233) between the elevators will lower, allowing the soul sphere resting upon it to be obtained.
  7. After descending either elevator in the stone area following the yellow key door, a portion of the northern wall is covered in muck. Press on this wall and it will lower to reveal a blue armor (sector 296).


  1. The fireplace inside the house contains a berserk pack. However, the floor inside will heavily hurt you.
  2. At the main staircase the lowest sector of the eastern handrail is a lift that allows climbing onto the banisters. From there you can jump over to the western handrail at the top of which a wall to the southwest can be walked through, leading into an alcove containing a megasphere.


Due to a secret being impossible to reach, you can only obtain 85% Secrets on this level.


Routes and tricks[]

The switch that raises the staircase in the northeast of the map can be flipped early when the elevator around it is lowered, as long as you are facing the linedef the switch is on and within activation range. Walk against the east or west sides of the platform the switch is on, and face the linedef before triggering it.

Although the intended method to obtain secret #6 is to lower the platform it is on by pressing a hidden switch, you can also take the elevators to either side of it, and strafejump onto the platform from there.

The megaspheres in the room west of the red keycard are meant to be obtained in cooperative multiplayer gameplay only, but it is possible to acquire them in single-player. To do so, flip the two front switches, press one of the first inner switches, and then run to the second platform lowered on the other side. Wait for it to raise, and then walk onto the outer edge. From there, you can walk onto the platform the megasphere rests on and obtain it. You can do so for both sides. However, because it takes up more time than is needed to finish the level, this is only used in episode and full-game runs, where it is used to obtain one megasphere in preparation for the next level.

Current records[]

The Compet-N records for the map are:

Run Time Player Date File Notes
UV speed 03:19 Adolf "Gusta" Vojta 2002-05-09
NM speed
UV max 06:04 Erwin Lin 2002-03-22
UV -fast 07:35 Chris "Ryback" Ratcliff 2001-08-29
UV -respawn
UV Tyson
UV pacifist

Miscellaneous demos[]

Run Time Player Date File Notes


Map data[]

Things 373
Vertexes 1171
Linedefs 1521
Sidedefs 2406
Sectors 366

Things (per skill levels)[]

Monsters ITYTD and HNTR HMP UV and NM
Arachnotrons 0 1 3
Arch-viles 0 0 3
Barons of hell 1 0 7
Demons 1 3 3
Heavy weapon dudes 9 11 13
Hell knights 2 11 6
Imps 14 15 18
Lost souls 3 5 8
Mancubi 2 5 8
Pain elementals 1 1 1
Revenants 3 5 7
Shotgun guys 16 22 18
Spectres 2 0 0
Zombiemen 9 2 1
Powerups ITYTD and HNTR HMP UV and NM
Armor bonuses 5 4 4
Backpacks 1 1 0
Berserk packs 1 1 1
Blue armors 1 1 1
Green armors 2 2 2
Health bonuses 16 15 14
Invisibilities 1 1 1
Medikits 11 10 5
Megaspheres 3 3 3
Soul Spheres 2 2 2
Stimpacks 2 3 8
Weapons ITYTD and HNTR HMP UV and NM
Chainsaws 1 1 1
Shotguns 1 2 2
Super shotguns 2 1 1
Chainguns 1 1 1
Rocket launchers 1 1 1
Plasma guns 1 1 1
Ammunition ITYTD and HNTR HMP UV and NM
Bullet boxes 3 3 3
4 shotgun shells 11 9 11
Shell boxes 10 10 9
Rockets 6 5 5
Rocket boxes 5 5 3
Energy cells 2 2 4
Energy cell packs 14 14 9
Blue cards 1 1 1
Red cards 1 1 1
Yellow cards 1 1 1
Barrels ITYTD and HNTR HMP UV and NM
Exploding barrels 4 4 4

External links[]