The Grand Slam coin-operated Slot Machine by Caille Bros. (circa 1932), and it's history and background, photos, repair help, manuals, for sale and wanted lists, and census survey is brought to you by The International Arcade Museum at the Museum of the Game. Try Grand Slam Deluxe slot online for free in demo mode with no download and no registration required and read the game's review before playing for real money. The free Grand Slam Casino slot machine has an eye catching traditional design, the slot appears much like it would at a casino at any time in the last 50 years. Each of the reels has the classic white curved structure, while a satisfying ‘thud’ meets each reel coming to a stop. Probably my favourite part of this slot game is the fact that it includes Grand Slam Mystery Win Symbols. These can appear in the base game and in Superbet mode. During the base game, three or more of these appearing scattered anywhere rewards you with a mystery win. This can be anything up to 10,000 coins.