E1M5: Phobos Lab (Doom)

E1M5: Phobos Lab is the fifth map of Knee-Deep in the Dead in Doom.

Walkthrough
Run across the slime pool (quickly, to minimize damage) and turn right down the hall. Go to the end and left out onto the porch overlooking a slime pool; this will raise a walkway on the opposite side of the slime pool.

Turn around, go back up the hall, and go up the stairs on your right. Collect secret #1 now if you like. Go out onto the walkway, go all the way down and left into another hallway. Follow this hallway to find the yellow keycard. Shoot demons through the window, if you like, while they cannot bite you.

Go back down the hall and jump into the slime pool. Go quickly to the brown wall in the southeast corner and push it to open it. (This is secret #2.) Follow the corridor at the back of this secret room to come back out in the hall just across the slime from the starting point.

Go through the door to the left of the stairs and follow the walkway around to the left. You will come to the yellow door. Go in and down the lift, watching for monster attacks. Go down the stairs toward the south. Continue down this hall, but listen because a door will open behind you and many monsters will come after you. There is a corresponding door on the north side, so monsters from that side will be coming after you soon as well, from the front and back.

The hall will lead to a walkway overlooking a slime pool with two large columns and a switch on a patio across the slime. Collect secrets #3, 4, and 5 now if you like. Run across the slime to the switch patio, but turn around quickly because the two large columns will descend quickly with monsters on them. After dispatching these monsters, click the switch to open a door outside and across the slime from the yellow door. If you like, get on the large columns, ride up, and jump across to high platforms to collect blue armor in one case and a box of ammo in the other.

Go back towards the yellow door using the north hallway. Collect secret #6 now if you want, but find your way back to the walkway outside the yellow door eventually.

Opposite the yellow door and across the slime, you have opened a door using the switch described above. Go in and follow the passageway to a room with computer panels on all the walls. Go to the far wall and turn right to see a switch. Collect secret #7 now if you like.

Click the switch to raise the panel and follow the corridor to a room with the blue keycard and a switch. Skip the switch, if you like, because it opens a door out to the walkway but we're not going that way now.

Grab the blue keycard and turn around and go left of the way you came in. Go down the steps to find the blue door.

Go through the blue door. Collect secrets #8 and 9 now if you like. Make your way to the north side of this room to find the exit door. There is an obstructing wall in the middle of this room, but the northernmost part in the middle is a secret door you may use if you like (it is not needed for 100% secrets).

Secrets

 * 1) In the hallway across the slime pool from the start, go up the stairs partway down on the left. Around to your right is a greenish secret door behind two barrels. Inside is a shotgun.
 * 2) After collecting the yellow keycard, come back to overlook the slime pool. Directly ahead, in the southwest corner of the slime pool, is a brownish secret door. Go across the slime and through the door to find a rocket launcher, box of rockets, blue armor, and some armor bonuses. Go down the corridor to the southwest to return to the hallway near the start.
 * 3) At the western side of the map, opposite a slime pool containing two large columns that go up and down and a switch, is a small alcove containing a medikit. The back wall is a secret door revealing a radiation suit.
 * 4) The wall to the south of the radiation suit above is another secret door, revealing a chainsaw.
 * 5) The wall to the south of the chainsaw above is yet another secret door leading to a courtyard with a soul sphere.
 * 6) Just after you go through the yellow door for the first time and go down the lift, two imps will be shooting at you from high platforms.  Both of these platforms will lower if you push on the wall below them (or if you walk a little down the hallway past either one).  Ride up on the northern platform and the wall to the right (east) opens a secret compartment with a box of shells. The back wall of this compartment opens into a room with a blur artifact and a pentagram-shaped teleporter which takes you back to near the start. There is also an metal-texture wall that opens back onto the walkway outside of the yellow door.
 * 7) You will come to a room with a blue floor and computer panels on all the walls. You will exit this room using a switch in the southeast corner to raise the panel it is on. But there is a panel that is a secret door to the west of the switch, on the other side of the part of the wall that sticks out into the room. Go through the secet door to collect a computer map, backpack, and other goodies.
 * 8) After going through the blue door, hug the wall to the left until you have made a U-turn. Ahead of you is a room with a light amplification visor.
 * 9) Go out of the visor room described above and continue to follow the wall around to the left. At the western end of the room, there is an off-color wall behind a barrel that is a secret door. Go through the door to register the secret; it goes into a hallway leading back to the pentegram room.

Demo files

 * [[Media:e1m5secr.lmp|No monsters, 100% secrets walkthrough]]

Records
The Compet-N records for the map are: