MAP15: Decomposition (Community Chest 4)


Community Chest 4 maps 12-20

01 02 03 04 05 06 07 08 09 10 11
(12 - 20)
21 22 23 24 25 26 27 28 29 30
Secret maps: 31 32
Bonus map: 35

This level occupies the map slot MAP15. For other maps which occupy this slot, see Category:MAP15.

MAP15: Decomposition is the fifteenth level of Community Chest 4. It was designed by Lord Z and uses a MIDI rendition of Metallica's "Creeping Death" sequenced by King Diamond (no relation to the musician). This map contains a secret exit leading to MAP31: Mortar Combat.


Map of Decomposition
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[edit]


  1. In the puzzle-like area at the northeast part of the map, the eastern computer room has a red door. Once you get the red key from Secret #4, head back here to open the door to a hellish room containing an arch-vile and a switch. (sector 452)
  2. In the brown hallway with metal structs, which is in the southern part of the map, use the switch near the south door to open it. Walk onto the computer terminal in this small room using the light on the floor and press the red panel, which allows you to get the plasma gun and energy cells in the room. (sector 1266)
  3. From the door leading to Secret #2, take the other door to another brown-floored hallway and take a left. In the lounge area with the zombiemen inside, press on the red, vent-like panel to lower it into a small corridor with health bonuses. (sector 1262)
  4. Inside of Secret #3, one of the pickups is actually an armor bonus. If you pick it up, look closely at the floor and you will see a small area pointing east. Press on the wall it points to to get the red skull key. (sector 1250)
  5. The switch that is pressed in Secret #1 raises a walkway on the western side of the puzzle room. Make your way there and open the vent shaft to drop in. From where you drop, go right, moving northwest through the shaft until you reach a fork where a lost soul attacks from the left and another fork is to the right. From where the lost soul was, open the shaft to a small room with monsters, medikits, a BFG9000, an energy cell pack, and a switch. (sector 413)
  6. At the fork mentioned in Secret #5, go right, and then right again (there is another lost soul in this fork, but only on Ultra-Violence or higher). The vent should dump into a small room with imps, medikits, and a megaarmor. (sector 365)
  7. Press the switch in Secret #5, then head back to the starting room. Open the door that leads to the yard outside, then open the door in the depression on your right. (sector 481) If you had not pressed the switch in Secret #5, you will not be able to open the door.
  8. Inside Secret #7, shoot both of the black marble faces to open the bars that lead to the secret exit, going to MAP31: Mortar Combat. (sector 1197)


Demo files[edit]

Areas / screenshots[edit]


Current records[edit]

The records for this map at the Doomed Speed Demos Archive are:

Run Time Player Date File Notes
UV speed
NM speed
UV max 09:06 Veinen 2014-08-07
UV -fast
UV -respawn
UV Tyson
UV pacifist

Miscellaneous demos[edit]

Style Time Player Date File Notes

This information was last verified in its entirety on January 23, 2018.



Map data[edit]

Things 603
Vertices 7790*
Linedefs 8262
Sidedefs 14131
Sectors 1468
* The vertex count without the effect of node building is 6652.


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

Technical information[edit]

Inspiration and development[edit]


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External links[edit]