Originally Posted by Maleficus
Im sorry, not quite old but my vote goes to Zelda: Ocarina of Time or Majora's Mask, both absolutely breathtaking games.
I agree with the OP! For their place and time, both titles were pretty amazing!
Honorable mention to Myst as well, the first game that really showcased the potential for thinking outside the box on the personal computer.
System Shock was the first shooter I really fell in love with, and Everquest on the MMO front.