If you are looking forward for the close release of
Duke Nukem Forever as much as I do, you probably already know the original Duke Nukem 3D. But if you never played it, here is maybe something for you: Tim12345 created a small flash 3d game using
CopperCube. It is a very small demo, but gives quite a good feeling about how the game was like:
IMO, it is a nice tribute. There is also the corresponding
thread in the CopperCube forum. Again, Tim didn't write any Actionscript for this and only used CopperCube behaviors for the game. :)