MAP23: Necrogenesis (Plutonia: Revisited Community Project)
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| PRCP maps 21-30 |
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MAP23: Necrogenesis is the twenty-third level of Plutonia: Revisited Community Project. It was designed by William Huber and uses the music track "Deep into the Code" composed by Robert Prince for Doom. The par time defined in MAPINFO is 3:00.
Contents
Walkthrough[edit]
Essentials[edit]
Step backwards to get a super shotgun and reveal a group of imps, then press the satyr switch in front of you to open the doors leading out of the room, which have a chaingunner and Hell knight behind them. Go through the western door to enter a cavern then open the north door to face one to three revenants (plus an arch-vile on Hurt Me Plenty skill level or higher), then enter the teleporter just past the door to go to the north-western area of the map.
Go north to a door, passing a cacodemon and knights (or a pain elemental and barons of Hell on HMP or higher), then open the door and go down the stairs to a mud pool with a mancubus inside it. Push the lion switch inside the pool to lower the stairs, revealing two compartments with imps, then press the gargoyle switch inside the west compartment to open a set of bars in the east compartment. Go through the bars and follow the steps up to an ambush by flying enemies, then continue to the top of the steps to get the blue skull key.
With the blue key, drop into the mud pool and enter the teleporter that has opened in the east compartment to get out of the pit, then go back through the entrance door and go up the steps to a red diamond teleporter which will send you back to the start. Go through the eastern door and go down the stairs then head north to a teleporter which goes to a ledge to the north. Approach the nearby door to release some demons then go through it and walk north to a switch, which will lower the bars at the south end of the hall and release one or two chaingunners and revenants around you. Go through the bars and climb the steps to the red skull key, then pick it up to summon a group of revenants, chaingunners, imps and cacodemons.
Open the door north of the red key to face some barons then go west and north along a walkway leading to a set of blue bars. Press the satyr switch opposite the bars as well as the gargoyle switch behind it to open the bars, then go through and head up the stairs to a door which leads to the yellow key room. Press the satyr switch at the north end of the room to open two closets with revenants in them, then press another switch in the north-western closet to open two further closets containing barons and a cyberdemon. Finally, press the third switch in the north-eastern closet to lower the pillar holding the yellow key, then leave the room to see that two or three arch-viles have been released
With the yellow key, retrace your steps to the T-junction north of the red key and enter the red diamond teleporter here to go back to the start. Return to the teleporter which goes to the blue key area, but this time after entering it use the lift to the west to go up to another teleporter, which will send you to the exit area. Go up the steps to a wooden barrier and walk north to a skull switch which will open that barrier, then go up the steps behind the barrier to reach the exit teleporter, which is inside a cage. Open the door east of the cage to face a couple of demons, press the satyr switch behind them to open two monster closets behind you, then press the skull switch inside the south closet to raise a platform west of the cage. Go back to the cage and deal with the revenants (and arch-viles on HMP or higher) that have appeared, then step across the platform you just raised to another switch and press it to open the cage.
Other points of interest[edit]
Secrets[edit]
- In the starting area, press the switch to the north and go west. As you reach the teleporter south of the giant sludge lake, look north-west. Run through the smaller sludgefall, to the north part of the cave behind it, and into the hole with an evil eye inside to be teleported to a dark area in the southernmost part of the map, where a spiderdemon guards four medikits, eight energy cells, and a BFG9000. (sector 224) Use the teleporter in the north part of the area to return to the start.
- After pressing the lion switch in the mud pool, south of the blue key, go to the gargoyle switch in the western compartment. Look west near the switch to notice a rectangular recess in the south wall where the northern torch is. Shoot at the recess to open the skin wall to the west and enter the new hallway to find a stimpack, shotgun shells, a supercharge, a box of bullets, and a backpack. (sector 402)
- From the red key, run east, jump over the island with a green torch, and from there into the wall's large opening to find another box of bullets and a megasphere. (sector 131)
- After pressing the switch north of the yellow key and exiting the room through the southern door, you will notice that the wall in the center of the semicircular stairs has lowered. In the new area, press on the recess in the eastern wall and use an evil eye to be teleported to a dark area in the northernmost part of the map; here, you will find an invulnerability, two boxes of bullets, six boxes of shotgun shells, two energy cells (eight on Ultra-Violence and Nightmare), four energy cell packs, and eight medikits. Stepping out of the teleporter pedestal will lower the wall to the north, revealing revenants and arch-viles. Press two switches south of the miniature towers to open the north doors. Walking towards the supercharge will register the secret. (sector 582) Use an evil eye to come back to the stairs area.
Bugs[edit]
There are no known bugs in this level.
Demo files[edit]
Areas / screenshots[edit]
Speedrunning[edit]
Routes and tricks[edit]
Current records[edit]
The records for the map at the Doom Speed Demo Archive are:
| Run | Time | Player | Date | File | Notes |
|---|---|---|---|---|---|
| UV speed | 0:28.54 | Insomnia | 2023-05-11 | pv23-028.zip | |
| NM speed | |||||
| UV max | 9:05.80 | j4rio | 2011-10-30 | pv23-905.zip | |
| NM 100S | |||||
| UV -fast | |||||
| UV -respawn | |||||
| UV Tyson | |||||
| UV pacifist | |||||
| NoMo | 0:19.69 | Aleksey Kamenev (4shockblast) | 2026-02-22 | pv23o019.zip |
The data was last verified in its entirety on March 10, 2026.
Deathmatch[edit]
Player spawns[edit]
This level contains four spawn points:
- facing west. (thing 775)
- facing south-east. (thing 776)
- facing south. (thing 777)
- facing south. (thing 778)
Statistics[edit]
Map data[edit]
| Things | 915 |
| Vertices | 4913* |
| Linedefs | 4334 |
| Sidedefs | 6511 |
| Sectors | 666 |
* The vertex count without the effect of node building is 3904.
Things[edit]
This level contains the following numbers of things per skill level:
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Technical information[edit]
Inspiration and development[edit]
This level is inspired by Anti-Christ from The Plutonia Experiment, Satan's Angel by Death-Destiny and Korzega Ruins from Necromantic Thirst. It was constructed in four days, using Doom Builder.
