I'm not absolutely sure, must have been either Daytona USA or Panzer Dragoon.
Daytona USA is probably the game I played the most in my life.
I remember watching the opening movie of Panzer Dragoon together with a friend. It's been all black and white, no color since the Saturn was an imported japanese one and my TV didn't support NTSC. Nevertheless, we were stunnished and thought: if it will be ever possible to compute this GFX in realtime? Of course we thought: no! Funny..