MAP25: Cesspool (Memento Mori)

MAP25: Cesspool is the twenty-fifth level of Memento Mori. It was designed by William Sullivan and uses the music track "Slipper" by Mark Klem. It makes extensive use of the deep water effect.

Walkthrough

 * Letters in italics refer to marked spots on the map. Sector numbers in boldface are secrets which count toward the end-of-level tally.

Secrets

 * 1) In the starting area, press upon the southeast computer terminal to reveal a switch.  Shoot this switch to open a secret alcove containing six boxes of shells, two boxes of ammo, two boxes of rockets, and a megasphere. (sector 134)  It is best to save this for after you obtain secrets #2-6.
 * 2) The next five secrets can only be accessed for the first 30 seconds of the level, so time is of the essence.  First, in the room after the starting area, enter the southwest compartment with the combat armor and kill the sergeant at the bottom.  Enter the space he was on.  (sector 9)
 * 3) After registering secret #2, get into the southern compartment with the soul sphere and kill the imp.  Grab the box of ammo. (sector 11)
 * 4) Then, head into the northeast compartment with the computer map, and kill the sergeant.  Grab the bulk cell.  (sector 18)
 * 5) After that, enter the northern compartment with the backpack and head down to find a sergeant.  Kill him and enter the space he was in.  (sector 17)
 * 6) Finally, go in the compartment in the northwest with the super shotgun and take the elevator down to find an imp.  Kill it and step into the sector it was in. (sector 16)  If you are fast enough, you can obtain all five of these secrets before the doors close, permanently blocking access.  If you are in a compartment when the doors close, just open the one you are behind to get out.
 * 7) Also in the room after the starting area is a compartment with a radiation suit in the southeast.  You can enter this and take it down before the doors close, leading to a secret room containing four radiation suits.  This actually consists of two sectors, both of which are marked secret. (sector 244) Alternatively, you can get here through secret #9.
 * 8) See secret #7. (sector 245)
 * 9) While standing in any of curved hallways in the east, shoot at the light poles through the hole between the hallways.  This will open a compartment in the southern one containing a blue skull key. (sector 61) Walk toward it and you will be teleported into secrets #7 and #8.
 * 10) In the northern, curved hallway in the east, open the window.  This will also open a compartment behind you containing enemies and a rocket launcher.  On Hurt Me Plenty or lower, this will also contain a bulk cell, a chainsaw, a berserk pack, and a box of shells. (sector 243)
 * 11) In the southwest room with the computer that opens the northern exit in the exit room, press on the side of the wall west of the side that opens the exit.  This raises a wall to the west, revealing a box of rockets. (sector 242)
 * 12)  In the northwest room with the computer that opens the northwest exit in the exit room, press on the side of the wall west of the side that opens the exit.  This raises a wall to the west, revealing a soul sphere. (sector 247)

Routes and tricks
This map is one of the few maps in Memento Mori that can be completed in under a minute, and one of the few that can be finished in less than 30 seconds. The required path through this map is quite short, but if you are speeding through the level, be prepared to take a lot of damage in the process.

Enemies cannot see into or out of sectors where the deep water effect is used, so in many places in this level, you can perform endless sneak attacks on enemies from inside these sectors, as well as on enemies inside these sectors from outside of them. In particular, the Spider Mastermind at the end of this level is unusually easy; because she cannot see out of the deep water sector she is in, you can stand on the stairway and fire upon her without her ever shooting back.

A death slide can be performed on this level by walking into any of the exit alcoves, prior to opening them, and letting an enemy's projectile kill you. This will push your corpse into the teleporter and end the level.

When performing UV max runs of this level, the preferred method to enter secrets #7 and #8 is to do so through secret #9. That way, you can enter secrets #2-6 during the level's first 30 seconds, and then proceed through the level from there.

Current records
The Compet-N records for the map are:

Trivia

 * This level was one of the earliest two, complete levels to be submitted, along with MAP16: Stoned.