xu4 Links

xu4 Links

Ultima IV Information

Gamespy Hall of Fame Review (viewed on the wayback machine)
A Walkthrough from StrategyWiki
Another Walkthrough from GameFAQs
Wikipedia's Ultima IV overview

File formats information

Other Ultima IV projects

The Ultima IV Graphics Upgrade
Optima IV, a Windows only closed source remake (has true 3D dungeons and is far more complete than xu4: highly recommended)
Avatarship, Ultima IV redone in Neverwinter Nights
Ultima IV Remastered, an improved port for the C64

Other remake projects

Exult, the Ultima 7 engine
Pentagram, an Ultima 8 engine
Nuvie, an Ultima 6 engine
Ultima 5 Redux, an Ultima 5 remake using Unity
ScummVM, an engine for LucasArts games like Monkey Island, Indiana Jones, and Day Of The Tentacle
An Eye of the Beholder remake

Miscellaneous

xu4 for the Sharp Zaurus Handheld
Aiera, a lot of current Ultima information
Ultima: The Reconstruction
Retrogames
Sir Cabirus Ultima Homepage, Ultima information in German
Gaming On Linux, a site devoted to Linux-based games
More U4 information on Dino's Ultima Page
Ultima and Worldbuilding in the Computer Role-Playing Game, a scholarly book about the series