Ultima V - Dungeon Doom (via Dungeon Shame): The Final Quest!

@~Make reference to the maps in the screenshots section or (for
@~Amiga owners) on the enclosed printout.

Here you will finally rescue Lord British. The dungeon is 
located at the exact centre of the Underworld and is reached by
descending through Dungeon Shame.  Use the Amulet to get through
the dark area to Doom. You must have the Crown, Sceptre, Amulet
and Word of Power for Doom. You also need the Sandalwood Box.

To Descend Dungeon Shame:
Yell the Word of Power.  At first you appear to be locked in, but
by attacking rocks on the Southern edge of the level with magic
axes, you'll eventually reveal a Southern exit.

Go through the exit and take the first corridor on your left.
Follow it around to the descent to Level 7. A sign will inform you
that this is the "deepest" level.

On Level 7, go: S - S - S - S then descend to Level 8.

On Level 8, go: W then DES POR to the Underworld. The exit, if you
care to find it, is (from your entrance on Level 8): W - W - S - W
- S - S - E - E - E through a secret door.

To find Doom, travel East as far as you can go, then "BLINK" to
the Grassy Plain. Cross the water on the Magic Carpet.

You must have already killed all the Shadowlords before entering
Doom. Also required are the Crown, Sceptre and Sandalwood Box. UP
and DOWN Spells cannot be cast here, so you can only exit by
saving Lord British or by being killed. Rings of Invisibility
don't work well here. It helps to wear the Crown.

Dungeon Doom
Level One
Exit the room by walking up to the edge of the West wall and using
the Sceptre, which clears out the walls. Follow the hall to the
ladder down at the far west of the map.

Level Two
Walk to South, then East and take the ladder down.

Level Three
Go due East through the east/west secret door and East to the room
at the far east side of the map where you can go down.

Level Four
You emerge from Level Three in the isolated room at the far west,
but continue down the ladder to Level Five.

Level Five and Four
You emerge at the far bottom west of the map. Go East, then climb
up the pit at the end of the corridor. You'll be at the top of the
'+' sign-shaped area on Level Four. Go South and search for the
pit in the middle of this area.  Climb down the pit, and you'll be
in the East/West corridor on Level Five.


If you look at a gem, this area looks like a giant grid, with
endless hallways in each direction.  Right now you are in between
intersections.  (You're about to get bounced around between levels
a few times here). There are pits going up at the intersection in
this area. Go East to the first intersection, turn North and take
the first pit that goes up between intersections.  You should come
out at the topmost pit on Level Four.

Search for the pit in the area's Southwest corner, which takes you
to a ladder that goes down through Level Five and drops you off at
the far east of the corridor on Level Six.

Level Six
Go West from here to the room at the junction, then move North to
the ladder and go down.

Level Seven
Go North to the room in the middle of the hall. Don't just pass
through. You must slay all monsters in the room. A Fear Spell -
followed by a Tremor or something like that - does wonders here.
Be SURE to wear the Crown here.  After wiping out the fiends,
collect all their stuff. From a sandtrap in the centre of the
room, you'll find a chest. Open it, take out everything, and a
ladder appears under the chest. Go down this ladder. (If you've
taken extensive damage, leave the room and heal first).

Level Eight
You emerge in a room (top right on the map) divided by a river.
Kill off the Dragons and Sea Serpents (a Fear Spell works well
here, too). To cross the river, you must activate a trip mechanism
in the upper left corner of the room. Use a magic axe, spears or a
throwing axe and hit the wall in that section. It's left of the
two waterfalls. When you hit it, the bridge is lowered so you can
cross the river.  This also releases some monsters, but you can
just race across the bridge if you don't want to fight it out. Go
West and climb the ladder to Level Seven.

Level Seven
In the room here, you want to go South but there is no exit. So
wipe out the monsters and push on the wall near the grate to
activate the trip, which exposes a section of wall to the North.
From where the grate is, go to the section of wall just revealed
and push on it, which opens an exit to the South. After going
South, search for a trap at the end of the hallway.  This pit trap
takes you down to Level Eight.

Level Eight
Go West and climb up the ladder to Level Seven.

Level Seven
From here, go West and South, searching for the pit trap on the
corner. Go around this one, search again and take the next pit
trap (in the middle of this north/south corridor) down to Level
Eight. (Be sure you're wearing the Crown before going down the
pit).

Level Eight
On the island, first wipe out all the monsters. Choose one
character to go to the Northern section of the room, which appears
to contain an exit.  After the exit seals itself off, someone
should push around on the little niche up in the walls of the
room's Northeast corner. There's a trip that opens an exit to the
East. Go East and climb up the ladder to Level Seven.

Level Seven
In this room is a giant brazier. Do not hit or push the brazier
(unless you enjoy being engulfed in hot lava!). To deal with the
Daemons on the other side of the barrier, use the Sceptre to chew
it away.  (If you're wearing the Crown, the Daemons can't harm
you). Then walk through and bash the monsters. (Or you can stand
near the wall and attack them with a Morningstar, though this
would take a long time). Exit to the East, but search before you
get to the end of the hallway to avoid falling into a trap. After
searching, you can go down the pit to Level Eight.

Level Eight: FREE AT LAST!!!
This isolated room has no exits. Walk up to the mirror. (Hopefully
you brought the Sandalwood Box!).