This package represents a quantum leap for the gaming industry. While most were content with the quasi-3D antics of Doom, this amazing experience redefined what we thought of as immersion. I can still remember the first time I watched someone else play descent; I had never seen someone physically move their head side-to-side, up-and-down with every flick of the mouse. The ability of a x486 machine to literally grab a human's attention with such strength is something that heretofore had never been possible. After this, the bar had forever been raised.
Any gamer should own this solely on principal alone, but it's fun as hell to boot.