Dune Legacy is open-source recreation of the Dune II game engine. Since its just game engine, you need to use original assets, but this is a good thing, since you get exact the same maps, units and everything game related. But on top of it, you’ll get unit multi-selection, support for bigger resolutions, (optionally) better AI and multiplayer! Also, you can change some rules in game in options, for example you can remove that buildings and units limit, if you want, and several others.
