My 2 all time favs:
Gauntlet (Atari)
APB (Atari)
I think these are system 2 games, but yes Atari was the king of games back then.
Other games that I REALLY dug:
Tempest (Atari)
Street Fighter 2 (Capcom) - before it became hyper turbo mega street fighter ex
NFL Blitz & NBA Jam
All the laser disc games - Dragon's Lair 1 & 2, Space Ace, etc. Yes, I LIKED those
Thorrin