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 primarily inspired by the much more ambitious project Exult. XU4 isn't a new game based on the Ultima IV story -- it is a faithful recreation of the old game, right up to the crappy graphics. If you are looking for a game with modern gameplay and graphics, this is not it -- yet. New features that improve the gameplay and keep with the spirit of the original game will be added. XU4 also tries to maintain strict compatibility with the original for its savegame files. You can use a game saved in XU4 with the original and vice versa, at least in theory.