chess.
oh wait you mean video games.
well, most of my gamecube games are still in use today.
most zelda titles age very well. same with metroid (still play super metroid to this day).
on the non-nintendo front, well, your mileage may vary, but i think the orignal halo can still hold a candle to the newer ones. (i'm calling it, thats going to spark some comment on how "that makes sense 'cause they're all the same" or some other nonsense).
less flame-war inducing games such as crimson skys: high road to revenge and Mechassualt have aged well as well.
i'm rather young for a "gamer" so that's why i don't have many older titles under my belt.
oh yeah, and i've been playing kid icarus on the wii, not bad for a game that's older than i am.