MAP03: Toxin Refinery (Phobos)


Phobos maps
This level occupies the map slot MAP03. For other maps which occupy this slot, see Category:MAP03.

MAP03: Toxin Refinery is the third map of Phobos. It was designed by Roger Ritenour.

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Map of Toxin Refinery
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. At the start, head all the way around the building that is to your left. You will spot some barrels at the backside of the wooden fence. Shoot them, and the section of fence will open up (if this does not happen, shoot at the wall directly). This will allow you to enter the building. (sector 130)
  2. Enter the building mentioned in Secret #1 and head to the last room, with two stimpacks, shotgun shells, and three health bonuses. Press alongside the wall at the east end and eventually you will open up a secret room, containing ammo clips and a soul sphere. (sector 146)
  3. When you reach the refinery, head to the southernmost room. Here, climb the large ladder to the vent and shoot it, allowing you access to the ventilation system. (sector 68)
  4. From Secret #3, perform a strafejump north so you land on the crate with the box of ammo and health bonuses.(sector 96)
  5. Come back to the first room after entering the refinery. This time, open the doors that lead to the room north of the entrance. Then, go to the northwest corner and press on the plain wall to lower it. You will find a berserk pack. (sector 154)
  6. When you reach the big silos, head around the northernmost one until you find a sealed entrance. Lower the wall there to find a green armor. (sector 354)


Four multiplayer-only armors (Things 62 through 65) have no flags set for any of the three difficulty classes, so they do not actually appear in the level.

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 December 5, 2021.


Player spawns[edit]

This level contains four spawn points:

  1. facing west. (thing 4)
  2. facing west. (thing 5)
  3. facing west. (thing 6)
  4. facing west. (thing 7)


Map data[edit]

Things 291
Vertices 2579*
Linedefs 1972
Sidedefs 3079
Sectors 365
* The vertex count without the effect of node building is 1697.


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

Technical information[edit]

Inspiration and development[edit]


See also[edit]


External links[edit]