There are three games I remember playing on Atari:
Centipede (of course)
Second was some kind of adventure game, and the third game you had to defend an underwater city from some sort of spaceships.
I also remember borrowing Spitfire from a friend. It was lame even for its time.
I'd like to see Centipede modernized as an FPS, but instead of shooting at the centipedes, you have have to fend them off with a Whiffle bat. (Or a waffle iron)
I think this B-17 sim should definitely come with a campaign editor and templates for the nose art, GR.