From DoomWiki.org

The starting areaThe starting area
Author Eddie Nguyen
Port Vanilla Doom
Year 1994
Link Doomworld/idgames
This level occupies the map slot E2M3. For other maps which occupy this slot, see Category:E2M3.
Under construction icon-yellow.svgThis article about a map is a stub. Please help the Doom Wiki by adding to it.

Diopatra is a single-level PWAD for Doom. It was released in 1994 by Eddie Nguyen, and is the third in a series of single-level wads, following UCA and Talpoida and preceding Sapidus.


Map of Diopatra
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. In the room immediately north of you after descending the first staircase, one of the torches is green instead of red. Behind it is a secret door into a tunnel which leads to a shrine. (sector 70) Two boxes of ammo, a box of shells, and an energy cell pack can be found inside. If you jump down to collect the cell pack, you can escape by following the river of lava to a secret door to a hidden lift leading to secret #2.
  2. In the hallway with the brown, cobblestone floor nearby the first room, there is an inverted cross on the east wall. The middle section is a secret door locked with the red key (sector 80) into a room containing two health bonuses and a backpack. While this secret can be accessed through the lift from secret #1 without a key, the secret door must be traversed for this secret to count.
  3. After collecting the yellow key, open the yellow door behind the switch-activated door north from secret #2 and press the switch on the wall. This opens a nearby doorway (sector 93) into a slime pit with a supercharge. However, this is an inescapable booby trap that will slowly kill you, unless you also press the button in the compartment found midway through the sewage tunnel to the exit. If you intend only to collect the secret, you can step into the doorway without jumping in, and then back out.
  4. In the slime cavern in the northeast, you can collect this secret by stepping on any of the following: the darkened middle point of the collapsing walkway; the darkened portion of the island behind the southern wall with the box of ammo; or the passage in the southwest that contains two medikits, an energy cell and a radiation suit. All of these are considered a single sector (sector 27).


Various rivers of lava in the cavern (sector 45) and the red circle in the northwest (sector 38) have sector effect 11, a 20% damage floor which harms you through the radiation suit, as intended by designer Eddie Nguyen[1]. However, this also ends the level when your health drops under 11% (as on E1M8), meaning you can finish the level by jumping into the nearest patch of cavern lava you can find.

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 0:09.17 Napsalm 2023-10-07 diopatra23p917.zip Cross-listed from Pacifist
NM speed 0:08.14 Napsalm 2023-10-07 diopatra23n814.zip
UV max 6:37.63 Eric Baker (The Green Herring) 2010-04-11 diop-tgh.zip
NM 100S
UV -fast
UV -respawn
UV Tyson
UV pacifist 0:09.17 Napsalm 2023-10-07 diopatra23p917.zip

The data was last verified in its entirety on November 2, 2023.

Miscellaneous demos[edit]

Style Time Player Date File Notes
UV speed glitchless 01:04 Eric Baker (The Green Herring) 2010-04-11 diop-tgh.zip DIOPa104.LMP; does not use the damage floor exit bug
NM speed glitchless 01:07 Eric Baker (The Green Herring) 2010-04-11 diop-tgh.zip DIOPn107.LMP; does not use the damage floor exit bug


Map data[edit]

Things 309
Vertices 1277*
Linedefs 1241
Sidedefs 1728
Sectors 112
* The vertex count without the effect of node building is 947.


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

Technical information[edit]

Inspiration and development[edit]


See also[edit]


  1. Nguyen, Eddie. "The cavernous tunnels are also laced with flowing lava, so watch how you walk. The radiation suits don't always provide adequate protection....". DIOPATRA.TXT from Diopatra at Doomworld/idgames. 1994-05-29. Retrieved 2017-11-12.

External links[edit]