MAP01: Entryway (Doom II)

MAP01: Entryway is the first map of Doom II, preceding MAP02: Underhalls. It was designed by Sandy Petersen, and uses the music track "Running From Evil".

Walkthrough
At the beginning, turn around to find a chainsaw. Go back and jump down the ledge. Go through the white corridor and turn right into a corridor. Go through it and enter the door near the imp cage. Flip the switch.

Secrets

 * 1) In the blue room (sector 43), flip both switches (Linedefs 75,84) (should you inadvertently lower the platforms (sectors 46,47,50,51), just walk up to where the second one was and activate it).  Not only will you be able to collect the clips, a compartment (sector 41) containing a suit of green armor and two stimpacks will open.
 * 2) Jump off onto the square platform below (sector 20). A compartment (sector 57) containing a rocket launcher will open behind the health bonuses.
 * 3) In the large room at the end (sector 18), open the back wall of the lift (sector 21) and flip the switch (linedef 3) to open a door (sector 31) leading outside. You'll find a shotgun and shells there.
 * 4) In the big room (sector 18), between the imp cage (sector 38) and the door outside (sector 31) (see above) is a secret compartment (sector 28) containing a stimpack.