Reminds me a little of the Ultima V - Lazarus[1] project, where volunteers re-implemented the entire game in the Dungeon Siege 3D engine. They also added tons of new characters and dialog, side quests, a richer plot, and new artwork and music. They did all this and managed to keep the major plot and game elements the same. They actually managed to greatly improve on what is unarguably :) the best Ultima of the series.