Pinball for the Intellivision. If you've never played pinball before, rush out to your local arcade. Or, (if you can get your hands on it) grab a copy of Pinball.
The title says it all. You try to keep a ball from falling past two flippers, which in turn propel the ball towards various targets. As you hit the targets, you aquire points.
Pinball was in development for over two years, as there were problems in getting the ball motion fluid and working. Pinball was originally released as part of the intellivision's "action network".