Dino's Ultima Page

Celebrating 21 Years

Ultima Underworld 1 - The Stygian Abyss

Bugs and Mistakes

Ultima Underworld I inaccuracies [English | German] can be found at Hacki's Ultima Page [English | German].

See the Fun section for some known bugs.


You can find Ultima Underworld I sections of websites:


My Lizardman Language page contains a dictionary showing Lizardman to English words, and a translator tool useful for quickly translating Lizardman text.


"Life Off the Grid, Part 1: Making Ultima Underworld" is a detailed account of the dynamics involved in the development of Ultima Underworld, including the background of those involved, technological breakthroughs, and a rough but ultimately fruitful relationship with Origin.

Ultima Underworld pioneered the technique of texture mapping. In his book "Masters of Doom", David Kushner talks about how texture mapping made its way into id Software's games thanks to Ultima Underworld:

"Texture mapping meant applying a detailed pattern or texture to a tile of graphics on the computer screen. Instead of drawing a solid color on the back wall of a game, the computer would draw a pattern of bricks. Romero heard about texture mapping from Paul Neurath, whose company, Blue Sky Productions, was working on a game called Ultima Underworld, which would be published by Richard Garriott's Origin company. Neurath told Romero that they were applying texture mapping to shapes or polygons in a three-dimensional world. Cool, Romero thought. When he hung up the phone, he spun his chair to Carmack and said, 'Paul said he's doing a game using texture mapping.'

"'Texture mapping?' Carmack replied, then took a few seconds to spin the concept around in his head. 'I can do that.'"

-- Masters of Doom, by David Kushner (2003), page 89

The book goes on to explain how this resulted in the game Catacomb 3D, which was released six months before Ultima Underworld.

The article "Madden '93 and immersive sim origins: the secret history of Ultima Underworld" (14th December 2022) is a reflection on the development of Ultima Underworld, 30 years after its release.


The Ultima Underworld I manual, "Memoires of Cabirus", can be found:

A picture of an early version of "Memoirs of Cabirus" can be found at Pix's Origin Adventures.

Dan Simpson's list of keyboard commands can be found as follows:

File Formats

Ultima Underworld file format information was compiled as part of the Underworld Adventures project. This documentation can be found as follows:



In the southwest corner of Level 6, there is "an upset spectre named Warren", clearly an easter egg for Warren Spector, the producer of Ultima Underworld.

"Our producer from Origin was Warren Spector, already a pretty important guy in the industry but someone who has since received yet more accolades for working on, well, Ultima Underworld, not to mention other games such as System Shock (with us), Deus Ex, and Epic Mickey. He is a super down-to-earth guy and we wasted no time in making fun of him, which he took with impressive grace. I guess it was a tradition at Origin to insert characters based on Warren into their games, so we figured we had to as well. Luckily we already had a “spectre” type of monster so it took no work to name one of them Warren. We made sure that Warren was in town the day that Tim was reading through the daily bug report list and said "Bug: There is no reference in the game to Warren Spector", to which the rest of us immediately piped up, "Fixed!" without further explanation, much to Warren’s chagrin."
-- Dan Schmidt, "Ultima Underworld bugs" (21st February 2011)

Other Bugs and In-Game Jokes

Dan Schmidt's blog article "Ultima Underworld bugs" (21st February 2011) talks about various bugs as well as intentional in-game jokes and references, including:

There's another story on his blog about the ghoul Eyesnack:

"One of the levels (5, I think?) was largely populated by ghouls, with standard flesh-eating names like Eyesnack and Kneenibble. Naturally you could talk to them instead of just fighting them. Jon Maiara (the same guy responsible for the Pac-Man homage) was writing the conversations for them, and included all sorts of things like the opportunity for you to make fun of Eyesnack’s name, to which he would respond by making fun of your name in return. You see the edge case, of course, right?

That’s right, part of our precious 640K was devoted to checking for whether the player’s name is also Eyesnack, in which case, in response to your mockery, the ghoul proclaims indignantly, "But your name same as mine!""
-- Dan Schmidt, "One more Ultima Underworld story" (17th March 2011)

F10 Cheats

Some sites report that you can use four key combinations starting with F10 in order to enable god mode, add more light, skip levels, and stop time. These don't seem to work (mainly because F10 is the shortcut that makes you rest), and are most likely fake.

Unlimited Light

Delete or rename the SHADES.DAT file, and you will never be in darkness again.

Unlimited Scrolls and Potions

Use a fireball spell on a scroll or potion. This reduces them to debris, but they do not use their power. You can then use them as much as you like without them ever getting consumed.


The Digital Antiquarian has written "Life Off the Grid, Part 2: Playing Ultima Underworld", a detailed account of Ultima Underworld's gameplay and why it was so groundbreaking for its time.

The game's gameplay is demonstrated by a Japanese commercial [YouTube video] which was recovered and uploaded by Dominus Dragon.


Screenshots of the incense-induced visions of the Cup of Wonder: [1 | 2 | 3]

Crowley provided annotated maps [ZIP] with locations of all magical equipment in Ultima Underworld 1, with the following information:

Crowley writes: Armor can be enchanted for increased toughness or protection, and weapons for damage or accuracy. These have the following levels:
Very Great
I used some abbreviations on the maps but those should be easily understandable. I have no idea about any numerical values associated, so I can't really say if for example a Dagger of Very Great Damage does more damage than a non-magical longsword. In addition there are a few magical items that cause the spell effect their name implies when worn, and those are rather self-explanatory. Perhaps the most obscure one is the Crown of Maze Navigation on level 7. There is a maze on that same level where stepping in the wrong place causes instant death. Wearing the crown shows the safe path. Also there is cursed armor and rings which cause damage when worn, but I didn't list those.

Combining Items

Lists of Runestone Locations

More from Sir Cabirus

Other item information pages at Sir Cabirus' Ultima Homepage include:

Unique Items

An incomplete list of some unique items in the game:


Magic Reference

My Ultima Underworld 1 Magic page is a reference on spells and runes used within the Stygian Abyss. It actually allows you to pick the runes available to you from the rune bag, and highlights the spells you can cast with those runes.

Undocumented Spells

Eight spells are not listed in the manual. You can find a list of these spells:

All Spells

Lists of all the spells can be found:


Maps of every level can be found:

Maps of the first level only can be found:


A zip file containing Ultima Underworld music is available for download from the Ultima Web Archive's Ultima Music page.

Individual tracks from the Ultima Underworld music can be downloaded from The Bard's Library, a section of Mysterious Sosaria.

Other Versions

There was a version of Ultima Underworld for PocketPC (Wayback Machine link), and there's a video on YouTube showing gameplay (links contributed by Vividos).


A page about Tyball and Garamon, taken from the Ultima Underworld cluebook "Mysteries of the Abyss", can be found at Sir Cabirus' Ultima Homepage.

Related Projects

Underworld Adventures

Entering the Abyss
Entering the Abyss
Author: Vividos
Source: Underworld Adventures
Used with permission from Vividos
3D view of the first level
3D view of the first level
Author: Vividos
Source: Underworld Adventures
Used with permission from Vividos
3D view of the whole Abyss
3D view of the whole Abyss
Author: Vividos
Source: Underworld Adventures
Used with permission from Vividos
Underworld Adventures Debugger
Underworld Adventures Debugger
Author: Vividos
Source: Underworld Adventures
Used with permission from Vividos
Interacting with the environment
Interacting with the environment
Author: Vividos
Source: Underworld Adventures
Used with permission from Vividos
In-game map of the first level
In-game map of the first level
Author: Vividos
Source: Underworld Adventures
Used with permission from Vividos

Underworld Adventures is a remake that was discontinued in 2007. It was originally hosted at SourceForge but moved to a new home on GitHub in February 2019.

Underworld Exporter

Hank Morgan's Underworld Exporter is an ongoing project to recreate Ultima Underworld 1 and 2 in Unity3D using the games' original data files.

Other Projects


Rampant Coyote wrote a "Reminiscing about Ultima Underworld" piece on 3rd June 2011.

A review by Russ Ceccola appeared in the June-July 1992 edition of Questbusters [PDF].

In a 2014 video by IGN, Tal Blevins talks about why Ultima Underworld is his all-time favourite game.

This review by Rosemary Young (September 2007) includes three screenshots from the game.

A 2-page review of Ultima Underworld is part of The CRPG Book (pages 154-155).

Ultima Underworld won the spot of Game of the Year (1992) in The CRPG Addict's post "1992/1993".

The MS-DOS Project published "Ultima Underworld Review (Ultima Goes Full 3D)" (15th July 2023) on YouTUbe.


The Ultima Underworld Walkthrough on Avocet Dragon's Journey to Sosaria is an excellent guide because apart from explaining what is to be done, the walkthrough shows maps of each area. Although the site is long gone, a copy of the walkthrough can be found at Bootstrike.

There is another walkthrough for Ultima Underworld at Sir Cabirus' Ultima Homepage in great detail.

A walkthrough for Ultima Underworld by Mitch Aigner is available in:

According to Bootstrike, these Ultima Underworld I Tips by Lord DCD make up the first Ultima Underworld I walkthrough, dating back to 1992.

Goldenflame Dragon's Ultima Underworld walkthrough was written during a playthrough and covers what is necessary to finish the game. It includes incomplete maps of each level as well as a list of mantras.

Kikoskia's Let's Play Ultima Underworld is a video playthrough of the game (spotted by Vividos).


WhoVideo LinkLengthYear
NinYouTube video / explanation [TXT] / video and explanation16:392015
Gamma DragonYouTube video / YouTube video / planning17:252012
lagdotcomN/A (see Speedrun entry)21:102014
thecybercat/GunnarPart 1 | Part 2 | Part 3 (YouTube) / Flash (Bootstrike)~30mins2008

Lists of Mantras

Lists of mantras can be found:

© by Daniel D'Agostino 2002-2023