MAP24: Hell Beneath (PlayStation Doom)

MAP24: Hell Beneath is the twenty-fourth level of PlayStation and Saturn versions of Doom, based on the original E4M1: Hell Beneath with modifications made to adapt consoles' limitations. The author of the original map is American McGee.

Music
The map uses the following music tracks:

Essentials
Red key

Take the shotgun and enter the open area. Shotgun guys will start spawning here, so repulse their attacks. After, head past the red door into the arch. Inside, turn right and push the switch at the end. Return back to discover a wall opened at the west revealing western area. Go there and turn right. You should notice an entrance to the building at the bottom. Carefully jump there and go to the southern end into a room. Here you can find red skull key. Taking this will spawn numerous enemies around the level and in this room, so repulse their attacks. To escape either push a wall in the second room leading to the western courtyard or use the lift at the entrance to the first room.

Blue key

Backtrack to the starting area and open the red door. Walk around the metal wall and kill the imps behind it. Find the blue skull key here, but note that once you take it, some enemies will spawn around.

With the blue key you are ready to exit the level. Go back to the western area you first found red key and open the blue door. The teleporter pad is the finish.

Secrets

 * 1) There is a secret lift in the first open area. If you fall down into the slime pool you can lower this lift to the right of you. This discovers two boxes of rockets and a rocket launcher. Quickly, take them and push a wall to your left. You will also discover a secret room with two teleporter pads. Each one brings you to one of ledges at the beginning where shotgun guys awaited you to enter. Take the supplies on the first ledge and go back to the secret room to teleport on the second ledge.
 * 2) When you possess the red key, open the red door at the beginning. In the room, notice the red torch to the left. Push it, and central metal structure will lower. Once you cross the west side of it the outer walls of the room will raise. Go away them, as they crush. If you make any noise, two hell knights will spawn here. To lower the outer wall, flip the switch. Sometimes, this secret is hard to register.