So it was technologically groundbreaking? Novel game-play? Both?
My game like that was either Ocarina of Time or maybe Goldeneye 64.
It was so cheesy and over the top that it became masterpiece (like Tarantino / Rodriguez movies, or recent Old Spice commercials).
id soft may have had technologically superior games (Quake is about the same age and had full 3d models instead of just sprites) but they were incomparably bland compared to Duke Nukem.
Also, gameplay was really fun. There were some very inspired gameplay elements: shrink and freeze guns, laser traps, remote triggered pipe-bombs, jetpacks. I still fondly remember multiplayer Duke sessions late in the night at lab in my university.
The Duke Nukem engine was (from my point of view) on par with Doom's engine, but their level design made playing the game a lot of fun. From seeing yourself in the mirror, to kicking toilets and fire hydrants, the world seemed much more alive than any other game at the time.
The game had a fun boy-ish "I'm gonna kick ass" vibe to it that isn't really seen today. Most FPS action games nowadays, while fun and entertaining, seem to take themselves too seriously. Musclebound Marcus Fenix is too brooding, and Roach too focused on terrorist plots to really portray the giddiness that was found in kicking a pig in the face with your manly boot.
I found something here: http://doom.wikia.com/wiki/Duke_Nukem_3D
"While Doom and Duke Nukem 3D feature similar technology, Duke Nukem 3D could in most respects be considered technically superior. The player can jump, crouch, and aim up or down. The rendering engine features slopes, overlapping and moving sectors, arbitrary scaling of textures and strong scripting capabilities"
I have to note that Ken's story is one of the things got me into programming as a kid, back when DN3D was still fresh.
This game was like seeing The Matrix without anyone telling you the basic plot. Your first hacker news post where pg actually responds to it. Your first bungee jump. Your first go on a real gun. Your first pvp kill in eve online.
It was ground breaking. It blew your mind and sent a chill up your spine.
It's just one of those things that when it came out it was so ahead of its time. It opened your eyes to what could be done. Now it seems dated, then it was amazing.
I guess those that had that the first time round are all hoping it will do the same thing again.