The doors to the mysterious pyramids and the treasures that lie within are open to you in the Book of Ra Deluxe slot machine game. With 10 paylines across 5. Book of Ra Deluxe is a newer version of the Book of Ra game. Play for free without downloading any software here. For players of the gaming machine, perhaps, it became one of the most beloved video slot. Considered bonus games, great graphics, great algorithm - all this.