Reading that almost makes me glad it never came out. They were trying to do too much. The great thing about Duke was the comedy and interaction with the world.
Some
Quotes:
Now this is a force to be reckoned with! [after discovering Luke Skywalker's corpse hanging upside down]
We meet again, Doctor Jones! [after discovering Indiana Jones corpse hanging]
Guess again, freakshow. I'm coming back to town, and the last thing that's gonna go through your mind before you die... is my size- 13 boot!
Hmm, don't have time to play with myself. [Duke examines the Duke Nukem II arcade machine]
Plus all the strippers.