MAP30: The Gateway of Hell (The Plutonia Experiment)

MAP30: The Gateway to Hell is the thirtieth and final map of The Plutonia Experiment. It was designed by Milo Casali and uses the music track "The End of DOOM", the music from Doom's text screens.

The Gateway of Hell is one of the three official Doom IWAD levels where the Icon of Sin appears. In the Plutonia Experiment, the monster is known as the Gatekeeper and is protected by a cyberdemon.

A separate deathmatch area exists outside the main map.

Essentials
Pick up all the goodies in the starting room and jump down the bloodfall. The bloody floor is not damaging, so feel free to walk on it. Pick up the BFG9000 on a platform in the middle of the room. Go towards the opening in the wall.

You will be teleported to an area with pillars and arch-viles in them. Go straight forward and the wall in front of you will lower revealing some lost souls. The Gatekeeper is covered and protected by a cyberdemon, which you need kill.

Drop into the circular pit in front of the cyberdemon. Use the switch on the right. Then use the switch to the left which will lower the pillar in the middle of the circle. Wait until the pillar is nearly at the top and fire a rocket into the the brain of the now unguarded Gatekeeper. Fire at least three rockets at the brain, just like in Doom II. The monsters around you may be ignored for the most part.

Other points of interest
If any of the spawn shooter cubes spawn a monster at the player's coordinates, the player will be killed by means of a telefrag. This will happen even if the player is invincible by means of cheats or powerups.

Official
There are no official secrets in this level.

Non-official

 * 1) Just like in Doom II MAP30: Icon of Sin, you can use the idclip noclip cheat code to enter the boss brain area, though it does not count as a secret.
 * 2) Similarly to the "secret" above, you can use the idclip cheat code and look around. After a while, you should find several dark rooms, all containing a weapon of some sort.

Bugs
The two first cases are connected to the Icon of Sin and are thus true in any level that has one.
 * In case the player remains in the level for a long period of time after being detected by the game's boss, the level will fill up with monsters. If many monsters populate the level, it can cause a possible crash, due to the nature of the Gatekeeper that endlessly fires its spawn shooter cubes that turn into monsters when reaching any given surfaces. The possible crash occurs when the number of living monsters exceed the limitations.


 * Saved games have specific problems in the level. If the player saves the game after having woken up the final boss, quits the game and then returns to the level via restoration, a Venetian blind crash will occur. A detailed explanation can be read here.


 * In the deathmatch area, in the lowest part of the automap in the area with the stairs, it is possible to get stuck behind one of the corpses.

Current records
The Compet-N records for the map are: The data was last verified in its entirety on February 12, 2013.

Map data
* The vertex count without the effect of node building is 1361.

Trivia

 * This is one of the three levels of Plutonia that contains the same number of monsters and objects regardless of the selected skill level, with the exception of an extra multiplayer-only cube shooter on UV and NM skill levels. The other levels are MAP21 and MAP32.