Basically any Sprite based game for the SNES or GBA have aged well kind of hard to find a bad example of that there. Personally I think all the Final Fantasies have managed to age well. The only sort of bumps are FFVII and FFVIII and given at the time how big the games were and how used the studio was to making 3d it still looks pretty good. I find the FFVII polygon characters aged a lot better then FFVIII as it gave it a kinda lego feel.
Donkey Kong and the Half Life games(more so 2 and the eps) as well as most of Valve's games tend to age quite well too.
Donkey Kong and the Half Life games(more so 2 and the eps) as well as most of Valve's games tend to age quite well too.