Defender, Dig Dug, Tempest, Karate Champ, Sinistar, the list goes on and on. There are so many endless classics. Funny thing is that I still have a working Atari, Commodore 64, Intellivision and Collecovision. I picked up the Collecovision and Intellivision at a garage sale complete with system and about 30 games for $50. I have 15 game systems hooked up to my media room. It's hard to compete with the classics for raw enjoyment though.