Mine had no stop so it must have been the driving controller (though now I may be mixing up my 2600 with my 7200). Time flies.

Driving controller makes way more sense for tempest, and the lack of use. My family had a pretty extensive collection of 2600 games, and two sets of paddles (needed for four player paddle games, we had one, but it wasn't very good and the 2nd set of paddles was wonky anyway), but no driving controller or any games that used it.

I had several driving games, too. But they used a joystick or the paddles.