Duke Nukem 3D was such an amazing game when it was released. It may not have had the true 3D technology that debuted with Quake, but it had a level of *personality* that hadn't really existed in this sort of game prior to Duke. Along with that, the Dev team did an amazing job of squeezing a really excellent game out of the technology available. I still think of it as one of my favorite FPS games. In fact, while Quake may have given us a glimpse into the future of FPS technology, Duke was easily the more fun game.