So many...
Atari 2600:
asteroids, duck hunt, Missle command, Battlezone (altough the arcade Battlezone was much better)
Intellivision:
Burget Time!
Timex / Sinclair 1000: 1K chess
Vic 20:
Bandits (the Vic's small screen made this a FAST game!), radar rat race.
Commodore 64:
Text adventures like Hitchikers Guide, Winter games, Caveman Ugh_lympics, world games, and Zaxxon!
I'll end there, I'm showing my age now.