Very interesting, I might have to buy it from GOG, I certainly liked Duke Nukem 3D, and I'm ready to bet that it will still be the best of the series even if Duke Nukem Forever gets released. There are some games out there that seem to be untouchable not only due to nostalgia but because the game-play is legitimately recognized as being simply golden, and won't ever be equaled ever again, but of course it's always a question of personal tastes in the end. I just feel that way for DOOM II: Hell on Earth, it's the best of the series in my mind, even if DOOM 4 ends up destroying DOOM 3, but it won't ever touch DOOM II.
And, hell... $6, who can ignore such a low price, and if I'm not mistaken the guys working at GOG are actually talented enough to engineer in some changes in the game's files to ensure complete comparability with today's operating systems and hardware. Although I've never heard of the non-GOG version of Duke Nukem 3D ever having any problems on XP or Vista, perhaps it would have problems under 64-Bit, but even that would surprise me. Yup, I think I'll get it and try that out, I haven't played it in ages, in fact I only remember the first level by heart, the rest is history, and hearing that Duke Nukem fella again will surely make me smile, come get some! My favorite quote if I recall correctly was: «Your face, your ass, what's the difference.»