MAP57: The Marshes (PlayStation Doom)

MAP57: The Marshes is a secret map of Ultimate Doom in the PlayStation and Saturn versions, which can accessed from MAP29: Twilight Descends. It was designed by Randy Estrella and uses the music track "Corrupted" in the PlayStation port and "The Broken Ones" in the Sega Saturn port both composed by Aubrey Hodges.

Walkthrough

 * Though this is a large, spread-out level containing a number of areas to explore, the main mission in this stage is to kill a Cyberdemon; doing so will unlock the exit in the beginning room.

Other points of interest
In the south part of the level, there are numerous trees forming a "forest". If you carefully search withinh it, you will find a light amplification visor and a super shotgun.

There is a wooden building in the east portion of the level. If you walk up the stairs you can notice two skull buttons; both manipulate the light on the map. Press the one on your right to increase the light level for a better vision (note, that the other one make the lights darker, in contrary).

In the watery area (the middle of the map), there are three groups of four teleporters. NEVER visit the ones in the south! They always lead to an inescapable room with a slow crushing ceiling (though there are a BFG9000 and an ammo for it appearing in the deathmatch, they actually act as a lure).

Secrets
1. In the area with the rocket launcher and the 10 rocket boxes there are 4 openings one of which has a small bridge leading to a small area containing a megasphere.

2. In the megasphere area there is a skull on the wall. Flip it, walk through and you will be teleported to a small cave containing a BFG 9000.

Trivia
This is the only time in any port of Ultimate Doom level that one will find a Super Shotgun.