The 11 Best Slot Machines of All Time Wheel of Fortune. For most of two decades, Wheel of Fortune has been the most popular slot machine type around. Blazing 7s. One of the longest-lasting slot games, Blazing 7s was introduced by Bally in the 1970s. Double Diamond. Megabucks. Cash Express. Reel 'Em In. Cleopatra. Sphinx.