Don't think I played Fifa 98, but I remember Fifa 97 and 99. 97 had an indoor option as well as an outdoor option, that was brilliant, also had Cantona in:cool:. Fifa 99 had Bergkamp on the front, "Phonxo Brother" (or however you spell it) as the theme tune! Also it had an option where you could virtually turn the ref off (no yellows or reds) meaning you could go up to the keeper if he had the ball in his arms and kick him.
Also, if we're talking about old school games, how about Championship Manager 01/02, was my first CM/FM game. Class game it was too!