Ralph Baer, who created the original Magnavox Odyssey unit and helped get Odyssey 2 the green light, once tinkered with designing Odyssey 2 games. One such game was Pinball!, which allowed players to build their own tables by positioning O-shaped bumpers onscreen. Baer never completed it, but in 2000 he authorized the creation of 30 cartridges, which were sold at Classic Gaming Expo 2000.
