The wall will lower when you walk over the red patch
<0x6b010ab,0x75220b7> to its west side.
+ The second `finger' from the east has some cages with former sergeants. To
get into those cages, walk over the red triangle <0x3fa278b,0x817fa0c>.
The floors of the cages lowers and a wall behind you will come down.
To lower the triangle column (actually it rises) you want to shoot the
back wall of one of the six cages the sergeants were in. Shooting it
raises the pillar exposing the red triangle, walking over which
lowers the sergeant platforms allowing you to get the stuff in each one.
# In the large circular room at the end of the middle finger is a
supercharge.
# The plasma gun is hidden in the western part <0x2072324,0x4ecdc0e> of the
pillar you see when you stand with your back to the second `finger' from the
west.
E3M3: PANDEMONIUM:
+ In the starting room, a megaarmor can be obtained on a ledge overlooking
the yard in front of where you start. When you go up the stairs to the
right, and then down the elevator to the area which has stairs going down
to where the blue key is, there is actually a second elevator in the wall
which leads up to the ledge with the armor. This second elevator
<0x48189c,0xfe5f9916> can only be used once, and you must move back
slightly after pressing the button or else the elevator will catch half way
up under an overhang. The armor's ledge does damage so grab it quickly.
+ Directly north of the beginning is a great open place with 4 pillars.
Pressing the switch <0xfea95756,0xaff327> in the north will lower the middle
pillar <0xfe921ce9,0xfef4c1db>, so you can get the shotgun.
+ To get to the rooms with the windows to the room in the beginning, go
north and take both the east and the west stairs, and then south.
# A little north of the middle is a round green lake <0x120905e,0x1754b6d> with
a lavalike ceiling. In an indention <0x1c9c5cd,0x1c492ee> in the east is the
chaingun.
# In the SW is a corridor with two platforms (one in the north and in the
south). There is a small corridor in the south. When you follow it, you'll
come to a T-split. In the west (right) is an invulnerability, useful for
running over the lava in the east. Take the turn left (east). You should be
on the southern platform of the corridor. In the south of that platform you
can see a lava/blood maze <0xfd9760e5,0x1de4aec>. In that maze you'll find
the BFG9000 <0xff1ebaad,0xdeec44> in the SE corner and a supercharger
<0xfe3afdf3,0x2101114> in the NW corner. You can also get to the lava maze
by going directly north from the beginning, then taking the west stairs,
then following the path north.
# One of the most northern chambers (the one just before the blue door leading
to the exit) has two air shafts flanking a formation you could describe as a
coach facing north. When you stand on the coach <0xff6e17cb,0x532520e> the
wall part west of the stairs south will lower allowing you to get the map.
The wall part <0xfffcfa97,0x41c62aa> east of the stairs will lower when you
push it.
# The last two secrets are in the area to the east of the level, off
the east hall and over the stairs guarded by lost souls. Just
entering the room around beyond it with the lava and Cacodemon counts
as one secret. Getting to the area past that with the berserk pack
and armor counts as another.
E3M4: HOUSE OF PAIN:
+ The first room to the west from the beginning has a secret room <0xfebbbdcd,
0xc4c579> in the SE corner containing the shotgun.
# In the SW (a bit behind the blue door) is a room with a doors to the east
(the entrance), to the north (where you find the BFG9000 <0xffdaa1b0,
0xfd07e1fa> in some lava), to the west (where a lot of Imps and a baron of
hell await you) and to the south. The south chamber has a secret room
<0xff49f58f,0xfae5873e> to the west filled with rockets.
# In the south middle east of the blue door is a room with a door to the north
and a small patch of blue lake on the east side. Press the wall <0x3ddce70,
0xf9d91cc3> a bit more north of that patch of blue for a green armorvest.
+ In the middle is a room with two pillars with switches on all sides.
Here is a rude ascii-chart of the scene to facilitate solving this.
[#] is a door opened by switch #
[Y] is the yellow keycard door
[R] is the red keycard door
Behind door 2: an invulnerability
Behind door 3: the yellow key
Behind door Y: the red key
+---+
+--+ | |
| +-------+ +--+
+-------------+ + [7] [Y] |
| [3] | ---+---+--+ rest of the level...
| --------+--+ [6] [7] | .
| [2] | +-+[R]+--+ |
| --------+--+ | | |
| 0 4 | | |
| 3 [] 1 7 [] 5 | ++ +-+ +-+ +
| 2 6 | +-+ +-+ +-+ <----- secret wall, press it
. +-+ for a radiation suit