beayn :
I loved this game. It was one of the only games that supported my 3D CyberMan mouse.
Descent was great for HW support. It supported my SpaceOrb 360 (6-DoF controller), my CrystalEyes LCD shutter 3D glasses, and some of the first 3D graphics cards. I think they even supported Aureal 3D sound in Descent II.
Before I got the SpaceOrb, I'd play it with two joysticks. It made the game sooo much easier.
It was the first and only game I really played over the modem, too. I don't remember any that worked too well before I started playing quake over the net.
And it was a
good game, too. I think Descent II was one of the first games with a CD soundtrack (okay, can't remember if Quake was first) by a big name band (Skinny Puppy). I'd sometimes pop the game disc in my CD player. But I was actually most impressed with the Midi tracks on my WaveBlaster II.
It was definitely one of the first games with full, texture-mapped 3D graphics. I think they used BSP trees. I remember reading about it on comp.graphics.algorithms, back in the day. I think the fact that the levels were divided into rooms was integral to making Decent 1 run at playable speeds.