MAP29: Island of Death (Memento Mori)

MAP29: Island of Death is the twenty-ninth level of Memento Mori. It was designed by Thomas Möller and uses the music track "Hidden Anger" by Mark Klem.

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) At the northwest of the map, climb up the stairway and approach the switch.  An elevator will lower to the east, which counts as a secret. (sector 497) The elevator leads to a room with four boxes of ammo, five boxes of shells, two boxes of rockets, and four medikits.
 * 2) In the toxic sludge room in the northeast of the map, run up to the wall with the skull on it and open it to find a megasphere.  (sector 520)

Routes and tricks
In single-player gameplay, under UV speed, NM speed, and UV pacifist rules, the map is extremely easy to finish. Going clockwise around the building you start in not only lets you access the red skull key (which can be grabbed without lowering the platform it is on,) but also opens a shortcut into the area with the berserk packs, which allows you to reach the red key door, and consequently, the exit, very early on. This makes the map completable in less than 30 seconds.

On the other hand, in cooperative multiplayer, the walkover linedef opening the shortcut, as well as the quickest way to the red skull key, are blocked off by green torches. This is intended to force you and your team to travel through much more of the level in order to complete it. However, two tricks devised by Kristian Ronge, the current UV pacifist record-holder on this level, allow the map to be completed through the single-player path even with the torch barrier. The first is performed in the starting area, by moving carefully around the pile of skulls, making sure not to fall into the blood moat, allowing you to obtain the red skull key in that location. The second takes advantage of the ability to trigger linedefs from any height, by opening the blood fountain in the first room, standing at its southwest or southeast sides within activation range of the southern switch, and flipping it to open the shortcuts. From there, the route is the same as in single-player. The tricks are demonstrated in Ronge's 00:49 coop speedrun at the Doom Speed Demos Archive, which requires ZDoom 1.22 and a command line argument to initiate a faked cooperative multiplayer game.

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