The weird thing about playing Duke Nukem 3D now, of course, is how difficult it is. Duke seems like the kind of guy you'd put at the center of something like the Serious Sam games, where three dozen enemies are a light warm-up and a good stage is a broad, flat plain with two thousand aliens bearing down on you.
Naturally, though, this is a late nineties joint, made when Quake was a big deal, so Duke Nukem 3D plays like Doom with a number of extra elements bolted on and a juvenile sense of humor. It's genuinely difficult, rewarding twitch reflexes and persistence, and only the game's odd personality keeps you from feeling alone, claustrophobic, and outgunned.
