My family still has an Atari 800 hooked up to a TV in our basement. We've got tons of classic games. Joust, Pole Position, Ms. Pacman, Capture the Flag, Star Raiders, Super Breakout, Mario Bros, Moon Patrol, Vanguard, etc.

Believe it or not, I'm still trying to beat Zelda 2. I haven't picked it up for a while...having trouble making it all the way to the hammer.
There are 3 Zelda games for a Nintendo system I haven't beaten. Zelda 2, Zelda: The Wind Waker, Zelda: The Four Sword
Of those, Zelda 2 is the only one I own.