Ultima 4: The Quest of the Avatar was released in 1985, and its graphics showed a marked improvement over those of the previous Ultimas. This was the first Ultima, from a strictly canonical perspective, that featured the recurring character that was the Avatar. Whether the Avatar was the Stranger from Another World of previous titles is the subject of some debate, and Ultima documentation at various times has given both "yes" and "no" answers to the question.

Ultima 4 is the Quest of the Avatar, where the player must strive to master the 8 Virtues and achieve the title of Avatar. Along the way, he or she will journey into the heart of the Underworld and discover the Codex of Ultimate Wisdom.
Ultima IV Reborn
Produced by: Devi
Website: Ultima IV Reborn @ NWVault
Releases:
* Ultima IV Reborn

This remake of Ultima 4 appeared on the Neverwinter Vault back in July 2003, although it only recently came to light.

While not completely faithful to the original, this remake does do a good job of re-telling the story, and it seems that what few omissions/changes are present are a result of the choice of engine. For example, the moongates do not appear/disappear according to the moon phases of Britannia. While this can be implemented in NWN, it does require a good deal of tedious and time-consuming event-scripting.

Ultima Classics Revisited
Produced by: prmths
Website: UCR
Releases:
* Version 0.1.0 (Windows)
* Version 0.1.2 (*nix)

This interesting collection of Ultima remakes currently offers a fully implemented engine for Akalabeth, and a partial engine for Ultima 1 as well. The current beta version is 0.1.2, and is hosted here for download. Akalabeth is fully playable now in UCR.

Featuring enhanced graphics and offering full compatibility with modern operating systems, this ambitious project aims to re-create the first two Ultima trilogies.

Avatarship
Produced by: Lyrac
Website: www.lyrac.net (currently down)
Releases:
* Module 1.3 (requires SoU)
* Module 1.3 (non-SoU)
* Hak Pak 1.3
* Music Files

Zonker's remake of Ultima 4 is the first of the remakes to have reached completion. It should be compatible with most versions of NWN patched to at least version 1.32. There are two versions of the module, one that requires the SoU Expansion Pack and one that does not.

xu4 - Ultima 4 Recreated
Produced by: Andrew Taylor
Website: xu4- Ultima IV
Releases:
* Version 1.0 (Windows)
* Version 1.0 (OSX)
* Source 1.0
* Version 1.0 (Linux)

Andrew Taylor's SDL-based re-creation of Ultima 4 is intended to be a cross-platform version of the game much as Exult is for Ultima 7.

And, since Ultima 4 is freeware, he (like many others) has also made available for download the original version of the game. As well, there is a graphics update available. The original game is now included with non-PC versions of xu4, but is required for Windows.

Ultima 4 - Virtue of Humility
Produced by: George Stephan
Website: Optima IV
Releases:
* Version 4.0430 (U4 Tileset)
* Version 4.0430(U5 Tileset)
* World Editor
* ReadMe

Using Dark Basic, George Stephan has created a faithful remake of Ultima 4. As an added bonus, he has released a custom tileset for the game based on the Ultima 5 graphics set.

Ultima 4 Upgrade
Produced by: Aradindae Dragon, Wiltshire Dragon
Website: Moongates Ultima 4 Annex
Releases:
* Upgrade 1.3
* Music Machine

An upgrade package for the PC version of Ultima 4 that adds VGA graphics support (256 colors), the original score from the Apple and Commodore versions of the game, hotkeys, and frame-limiting to keep the game speed normal on fast systems.

The upgrade began as two parts: Aradindae Dragon's Music Machine, and Wiltshire Dragon's Graphics Package. The upgrade is a combination of their efforts.