MAP21: Fracture (A.L.T.)


A.L.T. maps 21-30

01 02 03 04 05 06 07 08 09 10 11
12 13 14 15 16 17 18 19 20
(21 - 30)
Secret maps: 31 32

This level occupies the map slot MAP21. For other maps which occupy this slot, see Category:MAP21.
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MAP21: Fracture is the twenty-first map of A.L.T.. It was designed by ChaingunPredator and uses a MIDI rendition of the music track "Under a Glass Moon" by Dream Theater.


Map of Fracture
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.


Other points of interest[edit]


  1. In the easternmost area, climb the steps to the terminal, then jump from the broken fence to the block below. Jump to the area to the west and use the red button to trigger a lift. Ride it up and hop across the room to the radiation suit. Go south for a plasma gun, energy cells, and if you jump out the window you can find a megasphere (soul sphere on Hey, Not Too Rough or lower). (sector 301)
  2. Open the red door and find the wall on the left side with dark metal ridges on it. Open it to find a backpack and a medikit. (sector 316)
  3. On the lift that has the switch to open the blue key room, ride it all the way to the top and head into the vent to get the rocket launcher.(sector 518)
  4. At the start, head north into the bathroom and use the stall furthest from you. Open the wall in the back to find a backpack. (sector 614)


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
NM 100S
UV -fast
UV -respawn
UV Tyson
UV pacifist

The (absence of) data was last verified in its entirety on April 12, 2022.


Map data[edit]

Things 425
Vertices 9372*
Linedefs 7671
Sidedefs 13746
Sectors 638
* The vertex count without the effect of node building is 6476.


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

Technical information[edit]

Inspiration and development[edit]


See also[edit]


External links[edit]