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This level occupies the map slot MAP24. For other maps which occupy this slot, see Category:MAP24.

MAP24: Io Lab is the twenty-fourth level of Memento Mori II. It was designed by Sean Birkel in a techbase style reminiscent of Knee-Deep in the Dead, similar to his famous Doom episode replacement, Fava Beans. It uses the music track "GloomKeep" by David "Tolwyn" Shaw.

The level appears to be based on "Shit for DOOM" (SHIT.WAD,) an incomplete Doom level that Birkel had submitted to the idgames archive when he lost mapping inspiration. The original was a replacement for E1M7: Computer Station, and was influenced by that level. The beginning area of this level is highly reminiscent of that of E1M7: Titan's Anomaly from Fava Beans.

Mission briefing

According to both the text file and the Infopack:

This region was one of the first human on Io. The technics [sic] are old and of no use, but the enemy might be interested in it. We don't expect any humans in there, since these buildings were closed months ago. The thing is, when you're back we don't want to have ANY creature out there anymore. So, get going. Nice and easy, you've got plenty of time for this.


Map of MAP24

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


  1. From the map start area, pass the yellow door north of the toxic pool and go straight north. In the northern room with two barrels under skylights, the silver pillar in the southwestern corner can be lowered to reveal a switch. Flip it and return to the staircase opposite the blue key door to find that a tunnel (sector 115) has opened to reveal an armor bonus and an imp. At the end of this tunnel, press on the metal wall to lower it and obtain a blur artifact.
  2. Immediately after the red key door, a portion of the northern wall (sector 142) has taller panels than the rest. Open it to reveal a secret stairway leading to an alcove east of the containment area, allowing you to jump onto the crates.
  3. Enter secret #2, and then jump to the tallest stack of crates west of you. After this, jump to the westernmost stack (sector 190) to obtain a plasma gun.
  4. To the west of secret #3 is a recess in the wall. Open it to find a computer map (sector 198).
  5. At the northwest of the toxic pools, there is a tunnel that ends with a switch. Flip this switch and then return to the southwest of the map, in the hallway leading to where you found the yellow keycard. From the door east of this hallway, look to the west. North of the lamp is a green portion of the wall, standing out from the brown walls around it. Open it to reveal a secret tunnel; if you flipped the aforementioned switch, the tunnel's lowermost stair (sector 32) is passable and you will be able to head outside, where you can find (skill dependent) three/four/six troopers, a medikit, seven clips, a set of shells, a box of shotgun shells, a bulk cell, two boxes of rockets, a rocket launcher and a soul sphere.


Current records

The Compet-N records for the map are:

Run Time Player Date File Notes
UV speed 04:03 Miguel "myk" Folatelli 2003-03-03
NM speed
UV max 05:42 Eugene Kapustin 2004-03-14
UV -fast 09:05 Chris "Ryback" Ratcliff 2001-08-28
UV -respawn
UV Tyson
UV pacifist

Miscellaneous demos

Run Time Player Date File Notes


Map data

Things 386
Vertexes 835
Linedefs 1102
Sidedefs 1460
Sectors 244


Monsters ITYTD and HNTR HMP UV and NM
Barons of Hell 1 3 5
Cacodemons 3 4 5
Chaingunners 5 6 8
Demons 4 5 6
Hell Knights 4 3 4
Imps 24 29 34
Lost Souls 11 20 26
Mancubi 1 1 1
Pain Elementals 0 1 2
Revenants 5 7 9
Sergeants 24 29 34
Spectres 2 3 6
Troopers 24 33 46
Powerups ITYTD and HNTR HMP UV and NM
Armor bonuses 15 15 15
Computer maps 1 1 1
Green armors 1 1 1
Health bonuses 14 14 14
Invisibilities 1 1 1
Medikits 13 13 13
Soul Spheres 1 1 1
Stimpacks 9 9 9
Weapons ITYTD and HNTR HMP UV and NM
Shotguns 1 1 1
Super shotguns 2 2 2
Chainguns 2 2 2
Rocket launchers 1 1 1
Plasma rifles 1 1 1
BFG 9000s 1 1 1
Ammunition ITYTD and HNTR HMP UV and NM
Ammo clips 48 48 48
Bullet boxes 3 3 3
Shells 35 35 35
Shell boxes 5 5 5
Rockets 6 6 6
Rocket boxes 2 2 2
Bulk cells 2 2 2
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 11 11 11

External links