Online Double Diamond slot machine stays in line with the theme that inspires its creation to the letter with only a single win line placed on the centre row. The long-standing nature of the game shows in its presentation which matches that of the original slot machine games before the entry of video slots. The game is developed to be a replica of the original brick and mortar Double Diamond slot machine, which has been available on the platform for decades. The game is a true classic development by International Games Technology with three reels and the same number of rows. Double Diamond is one of the oldest online slots as well as among the simplest.