MAP22: Limbo (Console Doom)

MAP22: Limbo is the twenty-second and penultimate level of most console versions of Doom, based on the original E3M7: Limbo 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.

Essentials
Main route

Alternative route

Exit

Secrets

 * 1) (sector 31)
 * 2) (sector 51)
 * 3) (sector 130)

Bugs
A set of 4 shotgun shells (Thing 59) and an energy cell (Thing 120) have no flags set for any of the difficulty classes, so they do not actually appear in the level.

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

Geometry simplification

 * The island in the middle of the large round chamber at the center of the map has six sides instead of nine.
 * All the teleport chambers in the level, which are opened with the red skull key, now have six sides instead of eight.
 * There is a step in front of the hole that leads to the blood-filled hallways in the north-east side of the map. Part of this step has been removed, reducing the number of lines.
 * Two of the walls in the room in the south-west corner of the map have been merged together.
 * Three of the walls in the chamber in the north-west corner of the map have been merged together.

New design
Some rooms in the level were redesigned:
 * The large round chamber at the center of the map has a flaming sky rather than a ceiling.
 * The pits around the star on the west side of the map have been removed, and the star itself is now a pit. The sky is also visible above the star.
 * The teleporter in the room north of the star chamber has been moved further from the walls, probably due to the player's increased radius.
 * The blood pit in the south-west corner of the map has been reduced in size, and the teleporter has been moved further from the walls.
 * The blood-filled hallways in the north-east area of the map are wider due to the player's increased radius. A dead-end hallway connected to one of the islands has also been removed.

Other

 * Lorem ipsum

PlayStation
Some additional changes were made in the PlayStation port:
 * The bridge in the north-eastern room behind the blue door has been removed, along with the switch that raises it (normally located in an alcove on the south wall, west of the island holding the blue skull key). This has practically no effect on gameplay as the player can simply run through the pit and climb the stairs to get past this obstacle.

Music
The map uses the following music tracks:

Player spawns
This level contains four spawn points:
 * 1) facing north. (thing 134)
 * 2) facing north. (thing 135)
 * 3) facing north. (thing 136)
 * 4) facing north. (thing 137)

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