Hi all,
I've just finished another small project - three-dimensional version of Carcassonne game. I've called it "Hyperburg" because you can consider it as exploration of the surface of 4D planet.
Rules are almost classic with one exception - there is no "farmers" because roads don't divide 3D hypersurface, and instead I've added "seas and rivers" system that is like "roads and cities" with some small differences.
Web page for the game (with download link) is here: http://astr73.narod.ru/Hyperburg/index.html . Game requires Windows with .NET 2.0 - but this time it uses OpenGL, so no DirectX is required.
Good luck!
Andrey