MAP23: Dis (Console Doom)

MAP23: Dis is the final level of Atari Jaguar, 3DO, Sega 32X and Game Boy Advance versions of Doom, based, as a renamed level, on E2M9: Fortress of Mystery with modifications made to accommodate consoles' limitations. The author of the conversion is American McGee and the original author of the map is Sandy Petersen.

At the same time, it was named back to MAP55: Fortress of Mystery on Sony PlayStation and Sega Saturn versions and is now the second secret level in the game accessed from MAP15: Spawning Vats. The author of this conversion is unknown. Completing this level takes the player to MAP16: Hell Gate.

In the Sega 32X version of the game, this level can only be accessed if the player completed all the previous levels from the first level without cheating or use of the level selection feature. It is preceded by MAP15: Spawning Vats in this version of the game, as levels 16 through 22 (comprising the entirety of the Inferno episode) were cut due to ROM cartridge size restrictions for this version.

Versions comparison
Although the original map was geometrically simple enough, this console conversion changes the following:


 * The surrounding lava and the water pool were deleted altogether. The soulsphere which was on the water pool was not deleted.
 * The baron of Hell corpses in the second room were replaced with crucified human bodies, and the cages are now removed too.
 * The final room is now much more spacious compared with the original map version. This is done to accomodate the increased player radius. In the same room, all the wall panels were replaced with wooden doors. However, the player still needs to manually press the switch to open the first door with the skull key.
 * There are four new items added in this map version: three cell charge packs and a berserk pack in the cacodemons room.

The PlayStation and Saturn ports feature some additional modifications:
 * The crucified human corpse wall textures were removed.
 * There is an exit switch at the end of the level, instead of the portal.

Music
The map uses the following music tracks:

Trivia
This level is shown during the first and third demo rotations in the Sega Saturn port. Both are exactly identical.