E2M9: Chemical Imbalance (Lunar Catastrophe)

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Lunar Catastrophe maps
Fifty Million Miles From Home

M1 M2 M3 M4 M5 M6 M7 M8 M9

The Lost Moon
Where Bad Guys Go

M1 M2 M3 M4 M5 M6 M7 M8 M9

What Comes After

M1 M2 M3 M4 M5 M6 M7 M8 M9

This level occupies the map slot E2M9. For other maps which occupy this slot, see Category:E2M9.
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E2M9: Chemical Imbalance is the ninth and secret map in episode The Lost Moon of Lunar Catastrophe. It was designed by Derek Pierson (Count651), and the par time defined in MAPINFO is 1:30.


Map of Chemical Imbalance
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. Take the left path at the start and go to the red door. Go west, through the wall near the steps, to find a switch and a stimpack. The switch lowers the middle wall with a berserk pack. (sector 14)
  2. Take the left path at the start and go west, then at the curve, shoot the barrels through the northwest wall. Go through to find boxes of rockets and a megaarmor. (sector 19)
  3. Take the right path at the start and use the gargoyle switch, then go straight east to the pillar with the heart. Use it to lower a pillar nearby with a box of rockets. (sector 89)


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 February 21, 2022.


Player spawns[edit]

This level contains eight spawn points:

  1. facing north. (thing 231)
  2. facing west. (thing 232)
  3. facing east. (thing 233)
  4. facing south. (thing 234)
  5. facing north. (thing 235)
  6. facing east. (thing 236)
  7. facing south-east. (thing 237)
  8. facing south-west. (thing 238)


Map data[edit]

Things 239
Vertices 549*
Linedefs 571
Sidedefs 796
Sectors 96
* The vertex count without the effect of node building is 489.


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

Technical information[edit]

Inspiration and development[edit]


See also[edit]


External links[edit]