Z1M10: Penultimate Evil (Knee-Deep in ZDoom)

Z1M10: Penultimate Evil is the second secret level in Knee-Deep in ZDoom, accessed from Z1M7: Computer Station. Unlike other KDiZD levels, it revisits areas from many of Ultimate Doom's later levels. Images of these areas can be found in the screenshots section below. Interestingly, the skybox used in the level suggests that it takes place on Deimos.

Accessing this level
To access this level, the player must satisfy the following prerequisites by the time they complete Z1M7: Computer Station: If these conditions are satisfied, the cutscene played when the player enters the next map will be altered, and they will be sent to this level instead of Z1M8: Phobos Anomaly.
 * 1) The player must have accessed and completed Z1M9: Military Base;
 * 2) The player's cumulative Kills, Items, and Secrets stats must each be at least 90%. (This can be viewed after finishing any level.)

Walkthrough

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

Secrets

 * 1) Sector 605
 * 2) Sector 3115: From the start position, go out of the cage, and walk to the green pipes just to the left, go under the nukage, and make your way through the tunnel. After you surface, you will find a backpack and - after pressing the switch, a rocket launcher.
 * 3) Sector 3392
 * 4) Sector 3623
 * 5) Sector 3742
 * 6) Sector 4157
 * 7) Sector 6396
 * 8) Sector 7984
 * 9) TBA

Areas / Screenshots
''As mentioned above, this level is compromised mostly of areas from Ultimate Doom levels after Knee-Deep in the Dead. Note that this list is most likely to be incomplete, and that the screenshots are listed in no particular order.''

Speedrunning
The records for this map at the Doomed Speed Demos Archive are: Last updated on March 17, 2013.

Things
Initially, this level contains the following number of things on each skill level:

Primary Mapping

 * Daniel Gimmer (Tormentor667)
 * Björn Ostmann (Vader)

Secondary Mapping

 * Nick Baker (NiGHTMARE)
 * Michael Niggel (Risen)