E1M9: Operations (Double Impact)

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Double Impact maps
This level occupies the map slot E1M9. For other maps which occupy this slot, see Category:E1M9.
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E1M9: Operations is the ninth and secret map of Double Impact. It was designed by Matt Cibulas (RottKing) and Ralph Vickers (Ralphis), and uses the music track "". The par time defined in the DMAPINFO lump of the edition released as official add-on is 19:45.


Map of Operations
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. Make sure you have both the yellow key and the blue key for this secret. First, if you have not done so already, open the yellow door at the center of the map (the area with the blue floor) and press the switch to open the way to the teleporter to the north. Then go to the teleporter, but do not use it. Walk carefully around the right side of the teleporter, where you will find a switch behind it (you have to walk around the right side of the teleporter, as there is not enough room to squeeze past the teleporter on the left side). This switch opens a wall near the yellow door, and a blue door is behind the wall. This alternative blue door takes you to a hidden section where you can get an invulnerability and Secret #8 among other things. (sector 143)
  2. Just south of Secret #9 before the collapsing hallway is an alcove with brown and blue walls. Press on the rightmost blue square in this alcove to open a door leading to a medikit, a rocket, and a green armor. (sector 189)
  3. In the leftmost section of the map with nukage, jump into the nukage on the west side and press on the recessed wall to open it. The lift here counts as a secret, taking you to ammo clips, a backpack, and a medikit. (sector 268)
  4. At the leftmost section of the map with the nukage, take either of the two lifts up to the next level, then go north to where the armor bonuses are. A section of the wall here looks different than the rest. Open this wall to find health bonuses and a radiation suit. (sector 287)
  5. Once you open the red door near the starting point, drop into the ditch on your left and find a hidden switch next to where the lift back up is. Then go to the other ditch and into the open door leading to an alternate part of this area. (sector 313)
  6. One of the walls in the blue key room has an out-of-place line. Open this wall to find armor bonuses, partial invisibility, rockets, and stimpacks. (sector 527)
  7. When you take the blue door leading into the blue-floored region at the northeastern part of the map, take the right path. This path dead-ends at a gray wall, but you can lower the wall as a lift to reach a backpack and a medikit (there may also be an imp up here if you are playing on Hurt Me Plenty or higher). (sector 534)
  8. At Secret #1, take the lift to reach a brown area, then go northwest. At the dead end you see, a pillar with a bleeding heart blocks a switch here. Press this switch to open the door behind you. This room has a green armor, a chaingun, a berserk pack, and two rockets. Depending on your skill level there can be 1, 2, or 3 enemies in this room as well. (sector 619)
  9. Inside the blue-floored room with techno pillars at the north end of the map, go to the right wall and press on the recessed terminal to find a chainsaw. (sector 644)


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 10:58.37 Boris Klimeš (dew) 2012-03-25 d1i9-1058.zip
NM 100S
UV -fast
UV -respawn
UV Tyson
UV pacifist

The data was last verified in its entirety on December 9, 2021.


Player spawns[edit]

This level contains sixteen spawn points:

  1. facing south. (thing 951)
  2. facing east. (thing 952)
  3. facing north-west. (thing 953)
  4. facing north-east. (thing 954)
  5. facing south. (thing 955)
  6. facing south. (thing 956)
  7. facing west. (thing 957)
  8. facing east. (thing 958)
  9. facing south. (thing 959)
  10. facing east. (thing 960)
  11. facing west. (thing 961)
  12. facing north. (thing 962)
  13. facing north. (thing 963)
  14. facing south-west. (thing 964)
  15. facing north-east. (thing 965)
  16. facing north-west. (thing 966)


Map data[edit]

Things 1002
Vertices 3694*
Linedefs 3869
Sidedefs 5531
Sectors 652
* The vertex count without the effect of node building is 3145.


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

Technical information[edit]

Inspiration and development[edit]


See also[edit]


External links[edit]