"Reserve" is a single-player electro-mechanical pinball machine released by Williams Electronic Manufacturing Corporation on October 2, 1961. Designed by Steve Kordek, with artwork by George Molentin, the game features a nautical theme, capturing the adventurous spirit of underwater exploration. The playfield includes two flippers, three pop bumpers, two passive bumpers, two slingshots, four standup targets, two kick-out holes, and a gobble hole.