MAP09: The Launch Base (Harmony)


Harmony maps

This level occupies the map slot MAP09. For other maps which occupy this slot, see Category:MAP09.

MAP09: The Launch Base is the ninth map of Harmony. It was designed by Thomas van der Velden (t.v.) and uses the music track "Mercury Stripes, Blue Mess" by Kyū. The par time defined in MAPINFO is 5:35.


Map of The Launch Base
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.


If you are low on health, it may be sometime before you get a medikit. As such, be careful.

  1. In the south-east corner, there is a vent to enter the main tunnel. There is a total of two enemies visible, others are released later.
  2. In the tunnels, head to the west edge, and climb into the vent. You will encounter a lot of critters, but they are easily killed.
  3. Turn north to the large room and climb the stairs. before you flip the switch to lower the center elevator, equip an explosive weapon or some other attack that is good at a large number of targets. Lower the elevator, and kill the followers, before collecting the green key. Use it to open the north door.
  4. Destroy monsters as you go down the lift and through the corridor. Take the first north branch and locate the yellow key in the room.
  5. Return to the corridor, and you will directly encounter the yellow key door. Open it, enter the vent by climbing along the objects on the south-west, and you'll return to the missile base. A door opens for you. Enter it.
  6. Go through the room, and exit the other side. This provides access to the east missile silos.
  7. Go up the lift to enter the eastern silos. In the south silo, flip the switch in the south-west corner. In the north silo, flip the north-east switch. You can now exit the silo, and proceed east.
  8. You should reach a missile control room. Flip all five switches to launch the missiles, and extend a bridge leading west.
  9. Head west, and turn to the right. Collect the purple key, and use it to unlock the exit.
  10. When outside, use the plunger to blast open the wall.
  11. Proceed east, and flip the switch to the north. This allows access to the ship.
  12. Clear the mines surrounding the ship, and enter it to exit the level.


  1. During Walkthrough step 5, the bar has a painting in the south-east corner. Use the painting, and a secret will open in the north west of the room, revealing +100% health. (sector 233)

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 December 12, 2021.


Player spawns[edit]

This level contains four spawn points:

  1. facing east. (thing 218)
  2. facing west. (thing 220)
  3. facing south-east. (thing 222)
  4. facing south. (thing 225)


Map data[edit]

Things 222
Vertices 5388*
Linedefs 5345
Sidedefs 8810
Sectors 572
* The vertex count without the effect of node building is 4407.


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

External links[edit]