Brigandine-A strategy game that no one played, which is a shame, because it was a great game. It combined a cool soundtrack with monsters, a medieval/fantasy anime feel, and an good combat system. The characters were also likable, and the dialogue was intentionally funny.
Street Fighter Collection (1, not 2)-This is a collection of games, but I am only nominating it for Streetfighter Alpha 2: Gold. The SNES ports are just a bonus.
This is perhaps my favorite PS1 version of the Streetfighter series.
Resident Evil: Director's Cut-Almost as good as RE 2.
I second the nomination for the Final Fantasy and Gran Turismo series.