Are you ready? Who Wants to be a Millionaire: Mystery Box by Big Time Gaming comes with 5 reels and 243 ways to win. The randomly triggered Mystery Box Reveal feature can reveal any symbol including the Wild and the Scatter (the Who Wants to be a Millionaire? logo). 3 or more Scatters trigger the Free Spins feature, where you get increasing multipliers for every Scatter, up to 50x. The game has also a Gamble or Collect feature, where every win can be gambled.