Duke Hard is a 17 maps episode for Duke Nukem 3D made by the Duke4 community.
It has been shaped using EDuke32, and thanks to that, was able to have a 17maps long episode, a new title screen, intermission screen, intro&ending videos, as well as an unlock-able Randomizer mode which lets you play the episode with a randomized map order once you've beat it.
But most of all it is 17 maps of classic Duke Nukem 3D action!
More info, video trailer, screenshots and of course download link at :
www.moddb.com/mods/duke-hard