Aged well...hm, that's a tough one. There's so many classic games that I could mention in this category. I think I'd have to give it to Legend of Zelda: Ocarina of Time. This is still the blueprint for how to do a good 3D Zelda game. Majora's Mask, a rare case of Zelda direct sequels, was a lot like its predecessor but had a number of different gameplay elements that I thought took the Ocarina of Time method and brought new things to the table, like how you spent the three days and the mask gameplay. A shame that the sailing aspect of Wind Waker killed any hope of more forward movement with a Master Sword to the nostrils.
As for aged badly, I think I'm gonna give this one to the entirety of the Superman franchise in games. Superman's supposed to have only Kryptonite as his weakness, but evidently "bad games" should be added to that list. He just can't seem to make a good game, no matter how hard the Man of Steel tries. Admittedly, superhero games have had a less-than-favorable ride on game consoles, but of all the superhero games, Batman seems to have had the most favorable ride on consoles. Well, more favorable than every other superhero, anyway. But anyway, Superman just can't seem to get a good game going, and the day I see him wash the stink of Superman 64 off him is the day I see The Dark Knight get the Oscar it deserved (SCREW YOU, SLUMDOG MILLIONAIRE!). Sorry, Supes. Gaming ain't your thing.