MAP01: Attack (Master Levels)

Attack is a map that is part of the Master Levels for Doom II. It was designed by Tim Willits, and is contained in the file ATTACK.WAD.

Walkthrough
Here is a walkthrough

Secrets

 * 1) When you enter the building where the yellow key resides, a teleporter will open in the southwest of the map. After this, head to that area either by running all the way over there, or using the teleporter southwest of the building with the yellow key, and then reentering the teleporter you land on.  Once you are at the newly-opened teleporter, step onto the space directly south of it to trigger this secret. (sector 254)