MAP32: Super Secret (Scythe 2)

MAP32: Super Secret is the second secret map of the megawad Scythe 2 and can be accessed via MAP31: Secret. It was designed by Erik Alm and uses the music track "Intermission from DOOM" from Ultimate Doom E2M3.

Description
In a concept similar to Ultimate Doom's E3M9, the first half of MAP32: Super Secret achieves complete similarity to the first map of the original Scythe, with the one difference being the sky.

The level keeps this going until player reaches the would-be exit of Scythe's MAP01, at which the player notices a wall lowering to reveal a BFG 9000 and cells. From here, the difficulty raises as the formerly Trooper and Imp occupied map is filled with much more powerful enemies. New paths that branch off the original layout open, which the player must make his way through to complete the level.

Oddly this is, as far as I know, one of only two authors who ever used this trick in their PWAD. The other is Enjay, and it is used in E3M9 in Enjay Doom I starting with a replication of E3M1 from that wad, and again in Map32 of Enjay ZDoom 2001 which starts as a copy of its Map01.

Wraith tried this in E3M9 of Wonderful Doom, as it looks like E1M1 to start, but some architectural changes besides just sky can be noticed even before you reach the would-be exit.

Walkthrough
damn it write one

Speedrunning
See:
 * Scythe 2 Demopack at Doomworld