The original Duke Nukem and Duke Nukem II are great little platformer/shooters, and DN2 in particular still holds up well today. Duke Nukem 3D will always be a classic of the FPS genre, though in my opinion it hasn't held up all that well (I still enjoy it, but probably more for nostalgia's sake than anything.) It has aged better than Quake though, in my opinion. The other games that came out after DN3D are mostly crap. None ever lived up to that game's greatness, and none were true FPS games either. Duke Nukem Forever looks decent, and seems like it captures the feel and humor of DN3D, but for some reason I just can't shake the feeling that this game is just Gearbox attempting to cash in on the DNF name and development fiasco, and that the current game bears little in common with the game that 3D Realms initially set out to develop. Yeah yeah, I know they've said it stays true to 3D Realms vision, but really...this game couldn't POSSIBLY be THAT close to a 12 year old concept--and if it was, would that concept still be any GOOD in today's gaming world?