Ultima IV: Quest of the Avatar/Dungeons Despise and Covetous

Altar room stone combinations

Altar	Stones	Virtue	Linked dungeons
Truth	Blue Purple Green White	Honesty Honor Justice Spirituality	Deceit Shame Wrong Hythloth
Courage	Red Purple Orange White	Valor Honor Sacrifice Spirituality	Destard Shame Covetous Hythloth
Love	Yellow Orange Green White	Compassion Sacrifice Justice Spirituality	Despise Covetous Wrong Hythloth

General hints

Mainland dungeons:

Dungeon Despise (40 chests)
Dungeon Destard (88 chests)
Dungeon Wrong (22 chests)
Dungeon Hythloth (44 chests +6 in some versions)

Waterfront dungeons:

Dungeon Deceit (93 chests)
Dungeon Shame (45 chests)
Dungeon Covetous (39 chests)

Enter the dungeons from their mainland entrance, go through the Altar Room and emerge from a different dungeon with oversea entrance. From there, either backtrack or use the Gate spell.

For example:

Enter dungeon Destard, emerge from dungeon Shame (133 chests; 74 in the NES remake)
Enter dungeon Wrong, emerge from dungeon Deceit (115 chests; 78 in the NES remake)
Enter dungeon Despise, emerge from dungeon Covetous (79 chests; 55 in the NES remake)

Dungeons Destard and Shame

See also: Ultima IV: Quest of the Avatar (NES)/Six Dungeons#Dungeons Destard and Shame

The magic balls in both these dungeons raise strength (STR); the balls in Shame also raise intelligence (DEX).

Enter from Destard, west of Trinsic.
Get the Red and the Purple stones.
Leave from Shame and use a Gate spell.

L.	Map of the floor	Walkthrough
D1		When the party enters, they are at the cross of endless corridors (upper-right in the image). Use a gem and locate the secret passages. All stairs down connect to the same area.
D2		The northern fountain is harmful, the southern one cures poison.
D3		Two Magic Balls can be found on this floor. Each of them raises Strength by 5, but inflicts 200 damage.
D4		The color-changing tiles in the room are actually odd phantoms. If it is a glitch, it is replicated in all ports of the game.
D5		There is a trapped chest in the room: if a character steps on it, some of the energy fields that imprison the dragons will disappear. In particular, three separate fields will remain in each floor. Position strategically the companions before engaing the enemies. Take the west staircase first, then come back and take the north one.
D6		The western area is a dead end with the third and fourth Magic Balls, but they are protected by several darkening winds. The eastern area presents another choice, apart from the two rooms. Once again, take the west staircase first, then come back and take the east one.
D7		The western area repeats indefinitely, but it conceals the Red Stone of Courage. The eastern area has just a room without any enemy.
D8		Right next to the stairs to this floor there is a secret passage and a ladder that leads all the way up to a separate portion of the first floor. The rooms on this floor are easy. After you looted the secret area on the first floor, a secret passage to the north leads to the altar room at the end of the corridor.
D1		Each room presents a different challenge. A good strategy would be to let all companions but one leave the room before any chest is taken. In the North room, align the companions along the east wall, and wait for the Zorns to cross it. In the East room, the mimics in the corner conceal a further trap: step on the chest, and the walls will close down. Look carefully for secret passages that trigger further passages. In the South room, after all reapers have been defeated, the northmost chest will activate several poison fields. Note that one "Cure" spell is cheaper than two or three "Dispel" ones. In the West room, the halberds will definitely come in handy to fight enemies in narrow passages.
A	File:U4 AMI d0 Altar3.png	The north entrance is from Dungeon Destard. The west exit leads to Dungeon Shame. You need at least four Stones to use an Altar, but currently you own just two.
S8		From the altar room fo courage, the Companions access Dungeon Shame from the north-east of this floor. By crossing the three rooms to the south, the Companions will reach a fountain and two magic orbs. In the first room, notice the three "secret passage" tiles: the one in the center opens the wall to the west, the two south ones lead to the next room. In the second and third room, the "Negate" spells would prevent the Balrog and the Reapers from casting "Sleep" on all the Companions. The magic orbs in Dungeon Shame raise Strength and Intelligence by 5, but they inflict 400 damages. Luckily, there is a healing fountain near these two.
S7		Climbing up from level 8, the party will be in a corridor with two doors to their right. There is just one room on this floor, with a few chests and no enemies.
S6		A secret passage hides a vault with 22 chests (44 in the Master System port). Apart from that, the two ladders up lead to the same area of the next floor.
S5		This floor is free of dangers or puzzles.
S4		Five rooms form a crossroad. To the east, two magic orbs and two fountains. To the south, the upper three floors and the Stone, to the north the exit from the dungeon. Luckily again, the two fountains next to the orbs refresh all health points.
S3		Access the central room from the south, and exit it to the west to reach the stairs up.
S2		The altar with the Purple Stone of Honor is at the end of the corridor going south.
S1		As a bonus, there is a fifth Magic Orb on this floor! On the other hand, the foutain to the south is harmful. The trigger to open a passageway in the eastmost room is at the center of its eastmost tile column. In the middle room, the trigger is in a corner to the north-east, but the passage is on the other way of the poison fields; what is more demanding: 3 "Dispel" spells or almost 8 "Cure"? In the north room, the trigger is behind the east pillar.
S7		Back to level 4, cross the rooms to the north and reach the hidden staircase. The direction up is a dead end, whereas going down is the way out, after a change in direction on level 7. If you want to backtrack through the crypt on level 7, the first trigger is in the marsh tile in the south-east corner; the second one becomes then easily visible.