How to access the keys and the exit in MANOR.WAD:

In MANOR.WAD, you'll need all three keys to get into the
exit chamber.  Here's how to get those keys:

YELLOW KEY
----------
Note: You'll need to get this key before you can access the
other keys.
At the start of the mission, you'll appear on the east side
of the map, in an octagonal area.  You'll be facing west,
towards a distant door in a large structure ahead of you.
Go through the door into the large room beyond.  This is a
somewhat-squarish room, with 4 main doors: One each in the
center of the north, south, east and west walls.  Turn
right and go through the north-side door.  You'll enter
into another squarish room, with two large pillars running
floor to ceiling.
Go to the northwest corner of this room (there's a flashing
arrow on the floor pointing to this corner).  Step into the
corner, facing northwest, and activate the wall (like a
switch).  The corner section of the wall lifts up to reveal
a metallic elevator ahead, in the raised position.
Activate the elevator to lower it, and get on.  When it
rises, look left (south) for an opening in the west wall.
This opening leads to a long, raised catwalk, which runs
west, past a tall wooden structure to the south.  Walk west
to the far end of the catwalk, until your face is against
the wall.  Turn 90 degrees to face south, and walk (or run)
forward, stepping off the south edge of the catwalk.  You
should land on a ledge which runs along the outside of a
window to your right.  (If you miss the ledge and fall into
the small courtyard below, go to the southeast corner of
the courtyard, and go up the stairs you'll find there.  The
stairs lead back to the square room with the elevator in
the northwest corner.  Go get back on the catwalk and try
again.)
Once you're on the ledge, turn west and step through the
window.  You'll be standing on some boxes which line the
east wall of a narrow rectangular room.  Walk west,
stepping down off the boxes.  Turn left and walk south,
towards a door at the far end of the room.  As you walk up
to this door, you'll trigger an invisible "tripwire" on the
floor.  This causes part of the room's west wall to rise
up, revealing a skull switch at the north end of a wide,
shallow opening in the wall.  Activate this switch, and
some boxes to your right (to the east side of the switch)
drop down.  On top of these boxes sits a yellow skull key.
Grab it before the boxes rise up again.

BLUE KEY
--------
Note: Before you get this key, you'll need the yellow key.
When you pick up the yellow key, turn and head southwest to
the south end of the room.  Drop down off the wooden
platform you're on, and look for a tall, narrow wooden door
in the southeast corner of the room.  Open this door, and
take one step through it, east.  You'll step into a square
room, and you'll be standing on a ledge that runs all the
way around the room.  In the center of the room are some
huge slabs or blocks, stacked up in a rough "pyramid"
configuration.  Around the blocks is a trench, and around
the trench is the ledge you're on.  Turn left (north) and
look for a skull switch on the wall.  It will be just to
the north of the door you just stepped through.  Activate
it.  This will cause stair steps to rise up the sides of
the pyramid in the center of the room.  Now turn and walk
east on the ledge along the north side of the room.  About
halfway along the ledge, turn right (south) to face the
pyramid.  Run across the trench, and up the steps on the
pyramid.  (If you accidentally fall into the trench, walk
up to the pyramid and activate it like a switch.  The outer
layer of the bottom slab of the pyramid will drop down,
allowing you to get on and ride up.)
At the top of the pyramid is a pillar, and on the west side
of the pillar is a "Baron face".  Activate this like a
switch.  It causes a bridge to rise on the east side of the
pyramid.  Go around to the east side of the central pillar,
then turn east and walk down the pyramid steps to the
yellow-rimmed door on the east side of the room.  Go
through this door, into the squarish room near where you
started the level.  Now turn and go right, out the
south-side door. You'll enter into a room that has three
large bookshelf-structures in the middle.  Look for a
stairway to the southeast and go up it.  Ahead (east) and
to the left you'll find a fireplace.  Step in to the
right-side (east) half of the fireplace (warning: the
fireplace floor is harmful), and open the secret panel on
the back wall of the fireplace.  Walk into the short secret
passage that curves right and south.  Look for a skull
switch on the back wall of this passage, and activate it.
Walk back out through the secret panel, and out of the
fireplace.
The wall immediately to the northwest of the fireplace has
dropped down.  Go north, stepping through this new opening.
You'll drop down into a narrow area that has a large window
across from the the opening you dropped down through a
moment ago.  Turn right and look east-southeast for a skull
switch on the wall.  This switch causes a tall, narrow,
rounded pillar to drop.  This pillar is in the center of
the squarish room behind you to the northeast.  (You may
want to go look for this pillar before you activate this
switch.)  Activate the switch, and run for the pillar,
which has now dropped to floor level.  When you step on the
top of this lowered pillar, the blue key (on top of the
pyramid in the next room) becomes accessible: Run west,
through the open, yellow-rimmed door, into the "pyramid"
room.  At the top of the pyramid, a pillar has dropped,
allowing access to the blue key which rests on top.

RED KEY
-------
Note: Before you get this key, you'll need the yellow key
and the blue key.
As you pick up the blue key at the top of the pyramid (see
"BLUE KEY", above), look to the northwest corner of the
room for a tall, narrow, blue-rimmed door.  (It will be
just to the left of a skull switch on the wall.)  Go
through this door, and look right.  A nearby stack of boxes
is actually an elevator/lift.  Activate this lift and it
drops to the floor.  Get on and ride it up.  When you get
to the top, Run southwest to land on the wooden floor in
front of a blue-lined door in the southwest corner of the
room (be careful not to accidentally jump out the nearby
window in the southeast corner of the room).  Go through
this door, and you'll see a dark room ahead.  To your
right, running along the west side of the room, is a raised
ledge.  Follow this ledge south to the far end of the room,
where you'll find a red switch on the wall.  (If you fall
off the ledge, head to the northeast corner of the room,
and look for a tall, narrow wooden panel in the east wall.
Open it and go through.  Turn left (north) and go back
through the other blue-rimmed door, in the northwest corner
of the room. Continue on until you're all the way back to
the red switch.)
When you Activate this switch, it drops an elevator, which
is located behind you (north) near the opposite end of the
room.  Activate the switch, and run to go get on this
elevator.  When it rises back up, turn to face southeast.
Now, from the middle of the elevator platform, run
southeast to land on the highest elevated ledge, which runs
along the east side of the room.  Follow this ledge to an
east-side window.  When you get to the window, turn east to
find a teleporter pad you'll see just on the other side of
the window.  Step through the window and onto this pad.
You'll materialize facing west, looking at a brown wall.
Turn right and look for a passage to the northeast of where
you appeared.  Follow the narrow, winding passage around
until you come out into a "bedroom", with a large blue bed
ahead and to the right.
Look west out of the bedroom window, to the darkened room
beyond.  Through the window you'll see the top half of a
pillar that stretches up to the ceiling.  The base of the
pillar is wider than the top half, and so forms a ledge
running around the middle of the pillar.  In the bedroom,
back up to get a running start, and run west, out the
window, heading straight for the pillar.  You should hit
the east face of the pillar, and drop onto the ledge that
circles it.  Follow this ledge around to the west side of
the pillar, where you'll find a skull switch.  (If you fall
off this ledge, go out the door in the south wall of the
room, then go through the west side door in the next room.
From here, follow the directions from the start of the "RED
KEY" section.)
Note: When you activate this skull switch, be prepared to
run to the other pillar in the room, to the southwest.
Activate the switch, and a protective barrier drops from
around the other pillar.  Run to that pillar, and activate
the skull switch you'll see on its north face.  This causes
a door to open in the southeast corner of the room.  Go
through this door, and follow the passage east-northeast to
the red key, which sits on the floor, ahead.

THE EXIT
--------
As you pick up the red key, look for a nearby window, and
jump (south) out of it.  When you hit the ground, run west
to a large wooden door, and go through it to a squarish
room beyond.  Continue west to a yellow-rimmed door, and go
through it to enter the next room.
Look in the northwest corner of the room for a tall,
narrow, blue-rimmed door.  (It will be just to the left of
a skull switch on the wall.)  Go through this door, and
look right.  A nearby stack of boxes is actually an
elevator/lift.  Activate this lift and it drops to the
floor.  Get on and ride it up.  When you get to the top,
run southwest to land on the wooden floor in front of a
blue-lined door in the southwest corner of the room (be
careful not to accidentally jump out the nearby window in
the southeast corner of the room).
Take one step through this door, and turn left (east).
Carefully take a step or two along the ledge that runs
along the narrow north side of the room.  Look on your left
for a bank of "monitor screens" on the wall.  This vertical
panel of screens will be slightly recessed into the wall,
just to the east of the door you came through a second ago.
Step up to this panel and activate it like a switch.  It
opens, revealing a small chamber.
Step into the chamber, and turn left to find a skull switch
on the west wall.  Activate it.  (This drops a barrier in
the exit chamber.)  Turn left, and go take one step back
out through the secret panel you just came through (it may
have closed, so you may have to activate the wall again to
open it).  Once you've stepped through, turn right (west),
and look for a tall, narrow, red-rimmed door nearby in the
west wall of the room.  Go through this door into the exit
chamber.  Walk around to the right, and look for panel in
the east wall of the exit chamber.  Open the panel to find
a skull switch.  When you activate this switch, another
section opens to your left, in the north end of the
chamber.  When this section opens, another skull switch is
revealed in the middle of the north wall.
Activate this switch to exit the level.

To read about or download a demo of this level, click here.