E1M5: Mercury Mining Facility (The Classic Episode, Part 2)

E1M5: Mercury Mining Facility is the fifth map of The Classic Episode, Part 2. It was designed by Jan Van der Veken and uses the music track "The Demons from Adrian's Pen".

Secrets

 * 1) Just behind the shotgun, open a wall. Grab the computer map, the switch will raise a step. (sector 100)
 * 2) This step allows you to go to the soulsphere nearby. (sector 22)
 * 3) A trapped switch in the north of sector 100 lowers the access to the rocket launcher. You can grab it from the top northern room where you should open a wall on your right. (sector 192)
 * 4) This trapped room opens a wall on the left of the blue door. On your left, you see the invulnerability, a stimpack and the radsuit. (sector 250)
 * 5) Follow the corridor, you will see two boxes of rockets, a [(medikit]] and grab the mega armor. (sector 303)
 * 6) Entering the outside room with the blue key will lower the wall to the armor in front of you. (sector 201)
 * 7) Just after the red door, lower the wall and hit the switch, it will give you access to the backpack nearby. (sector 125)
 * 8) Before the pool of nukage, use the secret switch behind a candle, it will open a wall after the pool. Two boxes of rockets and two energy packs lie down here. (sector 279)

Current records
The records for the map at the Doomed Speed Demos Archive are:

Player spawns
This level contains four spawn points:
 * 1) facing west. (thing 28)
 * 2) facing north. (thing 29)
 * 3) facing north. (thing 30)
 * 4) facing south. (thing 31)

Things
This level contains the following numbers of things per skill level:

Inspiration and development

 * Originally released as a standalone WAD titled Doom Classic 10: Mercurius Pools in July 2003.
 * Another version of the level was also released in July 2003, two days later after the first WAD. It excludes the Cyberdemon after some players complained about its placement.
 * The modified version in The Classic Episode, Part 2 adjusts a light level.