Z1M3: Toxin Refinery (Knee-Deep in ZDoom)

Z1M3: Toxin Refinery is the third level of Knee-Deep in ZDoom, revisiting the original level with some new twists.

Secrets
1) Somewhere in the corridor on the way to the blue key, the terminal with a red symbol on the screen can be activated. The symbol will go a green, and a backpack will be revealed to your right.

2) From the same place as secret #1, go up the ladder to the south. You will be taken to a small room, containing useful items, Shadows, and a switch, which the effects of can be seen on the nearby screen.

3) In the mines, in the last cavern before the labs, the north-west tunnel will lead you to a chaingun and a backpack.

4) After the aforementioned labs, jump up onto the boxes in the west of the storage area. With some navigation, you will find an alcove containing a berserk pack.

5-11) TBA.

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

Primary mapping

 * Björn Ostmann (Vader)
 * Pawel Zarczynski (NMN)

Secondary mapping

 * Jacob Zuchowski (ellmo)

Tertiary mapping

 * Nick Baker (NiGHTMARE)
 * Fraser Low (TheDarkArchon)
 * Michael Niggel (Risen)