MAP20: Unholy Cathedral (Console Doom)


Console level navigator
Jaguar, 3DO, GBA, PlayStation, Saturn
Unholy Cathedral

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This is a console version
of a PC level.

This level occupies the map slot MAP20. For other maps which occupy this slot, see Category:MAP20.
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MAP20: Unholy Cathedral is the twentieth level of most console versions of Doom, based on the original E3M5: Unholy Cathedral with modifications made to adapt to the consoles' memory and ROM size limitations. It was converted by American McGee and originally designed by Sandy Petersen. The map first appeared in the Atari Jaguar version, and is additionally used in the 3DO, Game Boy Advance, Sony PlayStation, and Sega Saturn versions.


Map of Unholy Cathedral
Letters in italics refer to marked spots on the map. Sector numbers in boldface are secrets which count toward the end-of-level tally.


Main route

Alternative route


Other points of interest[edit]


  1. (sector 54)
  2. (sector 74)
  3. (sector 75)
  4. (sector 121)
  5. (sector 123)
  6. (sector 152)
  7. (sector 164)
  8. (sector 220)


Six "hanging leg" decorations (Things 216 through 221) have no flags set for any of the difficulty classes, so they do not actually appear in the level. Things 220 and 221 are placed on top of one another as well.

Comparison of versions[edit]

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Numerous changes exist in the level as compared to its PC version:

Geometry simplification[edit]

  • The walls surrounding the teleport landing pad in the middle of the central outdoor area were removed.
  • The pillars in the hallway west of the central area are square rather than octagonal.

New design[edit]

Some rooms in the level were redesigned:

  • The crushers protecting the switches in the blue key chamber were removed.
  • Walking into the large room past the exit door will cause two chambers to open and release a number of monsters. On the PC version of the level, the monsters teleport in instead.


  • Lorem ipsum


Some additional changes were made in the PlayStation port:

  • Lorem ipsum

Areas / screenshots[edit]

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Atari Jaguar screenshots[edit]

3DO screenshots[edit]

PlayStation screenshots[edit]

Sega Saturn screenshots[edit]

Game Boy Advance screenshots[edit]


The map uses the following music tracks:

Port Track Composer Notes
Atari Jaguar "At Doom's Gate" Robert Prince Only plays in the intermission screen after the map is completed.
3DO "Donna to the Rescue" Robert Prince Re-orchestrated version played by live band
Game Boy Advance "Demons on the Prey" Robert Prince
Sony PlayStation "Creeping Brutality" Aubrey Hodges
Sega Saturn "A Calm Panic Rises" Aubrey Hodges


Player spawns[edit]

This level contains five spawn points:

  1. facing north. (thing 278)
  2. facing south. (thing 279)
  3. facing south. (thing 280)
  4. facing north. (thing 281)
  5. facing north. (thing 282)


Map data[edit]

Things 298
Vertices 1083*
Linedefs 1168
Sidedefs 1526
Sectors 225
* The vertex count without the effect of node building is 899.


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

Technical information[edit]

Inspiration and development[edit]



Console Doom levels - Atari Jaguar, 3DO, Game Boy Advance
Secret levels:
Console Doom levels - Doom for Sony PlayStation and Sega Saturn
Ultimate Doom
Secret levels:
Doom II
The Star Base:
The City:
Secret levels: