Quake is a unique playing experience in and of itself.
Well, in single player, the game is awful to be quite frank. In short, if you're going to buy a game solely for a single player experience, don't buy this game. With these, Quake becomes the stuff sleepless nights are composed of. The graphics, of course, must be a addressed. If you've done any research whatsoever, you ought to know that Quake requires a decent machine to run.