Millionaire Mystery

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Millionaire Mystery Box Slot Machines

Million Mystery Box from Big Time gaming is based upon their 2018 release of Who Wants to Be a Millionaire which was not received well by the slot community as it appeared to make claims that were in fact not true, such as the advertised potential of the slot not ringing true.

Bet Range and Game play

Millionaire Mystery Box can be played on all devices from just 0.20 per spin making it a slot that will appeal to the masses. The slot plays out over 5-reels, 3-rows and offers a massive 243 ways to win. There is a Mystery Box Reveal feature which can reveal any symbol including the special ones such as the scatter and the wild. In the same way as Who Wants to Be a Millionaire things get far more interesting once you get to sit in the hot seat where you can find yourself rewarded with up to 24 free spins and a x50 multiplier too.

Theme and Graphics

The studio is identical to that used in Who Wants to Be a Millionaire and has neon seating around the hot seat which is set behind your transparent reels. The symbols are also the same as Who Wants to Be a Millionaire with the usual playing cards 9 through to Ace as the lower paying and green, blue, purple and red gems. The purple gem is the most rewarding and will award you with 25x your stake for landing five of a kind. The wild is a multicoloured symbol that carries an immediate x2 multiplier, however it can only be seen on the central three reels and as well as doubling your wins it can multiply with itself to get more symbols to connect.


As the name of the slot suggests this take on Who Wants to Be a Millionaire includes a Mystery box feature. Again, the Mystery box feature is only available on the three middle reels and when the mystery box symbol appears all symbols of it morph into random symbols that include the scatter and wild. This will assist you to create winning combinations as well as giving you the chance go gain access to the free spins feature.

There is no doubt that any millionaire game show would not be complete without a gamble feature and this is why the developers have made sure there is one on offer in this slot. The gamble feature becomes available whenever you create a winning combination in the standard game and gives you the chance to double up your winnings. This feature means that you can continue to gamble your win, doubling step by step until you decide to walk away with your winnings, or you lose.


The first slot Who Wants to Be a Millionaire, allowed players to gamble to land up to 50 free spins. However, things in this slot at rather different. In this slot you have to land three or more of the scatter symbol to gain access to the free spin feature and when you do you are rewarded with an initial 7 free spins. You will see that there is a ladder to the left of your reels that has multipliers and extra free spins. Each scatter that can be seen moves up the ladder as follows. The first scatter increases the multiplier to x3 and you receive an extra spin. Landing two scatters rewards you with an increased x4 multiplier and you receive an extra spin.

Three scatters and it is a x5 multiplier and three additional spins, whereas four scatters increases the multiplier x6 and an additional spin. Five and six scatters reward x7 and x8 multipliers respectively along with a single spin. Seven scatters increase the multiplier to x9 and comes with three extra spins whilst eight scatters provide a multiplier of x12 and a single extra spin. Landing nine or ten scatters are where things get even better with a x15 and x30 multiplier with one extra spin and the eleventh scatter is the one all players will want to land as the multiplier is a massive x50 multiplier and three additional spins. When you hit the top spot, you don’t run out of free spins as each scatter continues to provide an additional spin. Potentially there is a massive 12,000x your stake.

Real Money


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