Millionaire Mystery Box Slot by Big Time Gaming

Millionaire Mystery Box is a slot by Big Time Gaming, and as the name of the game suggests, this is a sequel of Big Time Gaming's Who Wants to Be a Millionaire slot with a Mystery Box feature. Other features include x2 Wild, Free Spins and Gamble feature. Millionaire Mystery Box is a medium variance, 5x3 reel slot that offers 243 ways to win with a max payout up to 12,000x.