Ultima IV ported to Linux
The authors of xu4 describe it as follows:
XU4 is a remake of the computer game Ultima IV. The goal is to make it easy and convenient to play this classic on modern operating systems. XU4 is a cross-platform application thanks to SDL; it's available for Windows, MacOS X, Linux and more. This project is currently under development and beta releases are available. The game is fully playable from beginning to end.
I have packaged it for Debian.
There are separate Debian packages for the game engine, for the game data and for additional graphics data. You can find them in the apt archive as described on the main Debian page.
Note that all of these packages are non-free according to The Debian Free Software Guidelines (link is external). They may not even be freely distributable.