My top 10:
1. Pitfall 2
2. River Raid
3. H.E.R.O.
4. Seaquest
5. Megamania
6. Dragonfire
7. Demon Attack
8. Montezuma's Revenge
9. Beamrider
10. Enduro
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11. Pitfall!
12. Stargate / Defender 2
13. Phoenix
14. Chopper Command
15. Outlaw
16. Yar's Revenge
17. Atlantis
18. Solar Fox
19. Jungle Hunt
20. Turmoil
Honorable Mentions: Berzerk, Moonsweeper, Missile Command, Astroblast, and Galaxian.