Asteroids
The guys at SFSignal found Neave games, where you can find a true-to-the-original version of Asteroids, right down to the cheesy sound effects.
Neave also has ports of Space Invaders, Pac Man, and Tetris. I love modern gaming technology, and enjoy the many hours I have devoted to beating Halo on my Xbox. But it sure is fun to revisit some of these classics from the past.