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This level occupies the map slot MAP20. For other maps which occupy this slot, see Category:MAP20.

MAP20: Mountain Depot is the twentieth level of Memento Mori. It was designed by Scott Lampert <>, and uses the music track "Terror" by Mark Klem.


MM MAP20 map

Map of MAP20

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


In order to get the red key in the northwest building use the green slime wall to raise the floor.

Other points of interest[]

There is a BFG9000, the first officially obtainable one (aside from deathmatch) in a small room in the west. The room is blocked by three doors, each is opened by a lion switch. One switch at the eastern side of the central building, one is in the northwestern building, and one is at the eastern building. There is also a teleporter that brings you from the southern building to the switch in the center of the map, providing you a little shortcut to reactivate the switches in case you escaped the BFG room when ambushed by remaining lost souls. (The doors will shut behind you when you enter the room, but you can temporarily open these from inside. The doors stay opened only by using the switches.) To get the BFG, there are at least two ways:

  • You can perform a rocket jump. Shoot at the closed door running backwards. This lifts you sufficiently to grab the BFG.
  • You can straferun from outside the room through the opened doors towards the plinth the BFG rests on to grab it.


  1. Ride down the lift west from the map start and ascend the stairs to the south. You end up in a room with many pipes on the walls. One set of pipes in the east is arranged differently from the rest. Press on this portion of the wall to find a compartment (sector 248) containing a blur artifact.
  2. In the northern wall in the southeast of the cyberdemon's cave, there is a stone passageway (sector 195) leading into a large stone room with a pain elemental and three imps. Flip the skull switch in the southeast to unveil a compartment with a box of bullets, an armor bonus (only on Ultra-Violence or higher) and a teleporter. The teleporter leads to another compartment; open the wall directly in front of you to access a normally caged-off area at the entrance of the cave containing a chaingunner, two imps, a megasphere and an invulnerability. Go back into the teleporter you came from to be taken back outside, on the lowermost step of the stairs surrounding the circular pool in the northeast of the cave.
  3. In the building accessible beyond the red key door, there is a giant section of wall in the southern hallway covered with electronics. Open this wall to reveal a secret room (sector 181) with three troopers, a sergeant, a backpack and a box of rockets.


  • A shotgun guy (thing 130) is placed inside the zero-length sector of the cliffs located in northern part of the map, so it will be impossible to get 100% kills.
  • An armor bonus (thing 264) is not collectable: The path (sector 216) between wall and teleporter (sector 219, tag 18) is to narrow to walk over without being teleported. There is a teleport destination (thing 34) inside the teleporter so that in theory one could teleport to there and walk to the armor bonus, but since the corresponding linedef is missing, this is impossible.


Current records[]

The Compet-N records for the map are:

Run Time Player Date File Notes
UV speed 01:11 Jakub "method_man" Razak 2003-12-20
NM speed
UV max 07:19 Jakub "method_man" Razak 2003-12-28
UV -fast 10:46 Chris "Ryback" Ratcliff 2001-04-24
UV -respawn 05:48 Chris "Ryback" Ratcliff 2002-05-04
UV Tyson
UV pacifist

Miscellaneous demos[]

Run Time Player Date File Notes


Map data[]

Things 466
Vertexes 1440
Linedefs 1802
Sidedefs 2666
Sectors 291


Monsters ITYTD and HNTR HMP UV and NM
Sergeants 47 47 48
Troopers 38 37 37
Chaingunners 7 7 9
Pain elementals 1 1 1
Cyberdemons 0 1 1
Arch-viles 1 2 2
Demons 15 14 17
Spectres 3 5 8
Imps 32 32 32
Cacodemons 2 2 2
Hell knights 1 1 1
Barons of hell 1 0 1
Revenants 2 5 6
Arachnotrons 2 3 3
Lost souls 12 12 19
Weapons ITYTD and HNTR HMP UV and NM
Chainsaws 1 1 1
Super shotguns 1 1 1
Rocket launchers 1 1 1
Plasma guns 1 1 1
BFG9000s 1 1 1
Ammunition ITYTD and HNTR HMP UV and NM
Clips 12 12 12
Bullet boxes 3 3 3
Shells 14 14 14
Shell boxes 8 8 8
Rockets 6 6 6
Rocket boxes 3 2 2
Energy cells 4 4 4
Bulk cells 1 1 1
Powerups ITYTD and HNTR HMP UV and NM
Backpacks 1 1 1
Berserks 2 2 2
Medikits 8 8 10
Stimpacks 7 7 6
Health bonuses 23 23 23
Soul spheres 1 1 1
Megaspheres 1 1 1
Green armors 2 2 2
Blue armors 1 1 1
Armor bonuses 18 18 19
Radiation suits 1 1 1
Invulnerabilities 1 1 1
Invisibilities 2 2 2
Computer maps 1 1 1
Blue keycards 1 1 1
Yellow keycards 1 1 1
Red keycards 1 1 1
Barrels ITYTD and HNTR HMP UV and NM
Exploding barrels 58 58 58

External links[]