Who Wants To Be A Millionaire Mystery Box Slot Review

I have to admit to being a little unsure whether Jeremy Clarkson would be a popular choicejackpot mobile slots as the new host of Who Wants to be a Millionaire. The famous gameshow has been revamped a little over the years and it has crowned some notable players as millionaires in that time and to be fair, Clarkson’s addition to the show, when it was brought back for a brief run, did work well.

Unsurprisingly, interest in the show increased as a result and I am sure that played a key role in the release of the Who Wants to be a Millionaire Mystery Box slot this past autumn. The game features some unusual features, a potential jackpot of 12,000x your stake and the chance to earn a multiplier of up to 50x the standard win in the Free Spins bonus round.

So let’s sit down in the famous hot seat, wait for the lights to go down and the music to begin as we take a look at this newly released slot from Big Time Gaming.

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Key Information for the Who Wants to be a Millionaire Mystery Box Slot

  • Developed By – Big Time Gaming
  • Mobile – Yes
  • Number of Reels – 5×3
  • Number of Pay Lines – 243 ways to win
  • Minimum Bet – 0.20
  • Maximum Bet – 100.00
  • Free Spins Bonus? – Yes
  • Other Bonuses? –  Yes
  • Standard Jackpot – 12,000x
  • Progressive? – No
  • Volatility? – Medium to High

Big Time Gaming have released a number of slots in the Who Wants to be a Millionaire series, and not all of them have been solid releases. The early games were criticised by many for being too punitive for players and only offering smaller value payouts. This new game, released in November 2019, seems to have learned from that and has used many of the same graphics and sounds, but packaged them together in a very different way. The net result is a rather pleasing slot with some unusual features and a 12,000x possible jackpot.

Theme and Presentation

If you have played any of the other Who Wants to be a Millionaire slot games over the years, especially the Megaways version of the game, then the presentation of this slot from Big Time Gaming will look entirely familiar, as it will if you are a regular viewer of the TV show when it is shown on television.

The setting of the game is the Who Wants to be a Millionaire studio set, with the reels superimposed over this. Of course, part of the experience is the music that plays when a contestant is trying to land a shot at that big money prize and the same music is used in this slot to great effect.

One thing to note is that the slot uses a little known feature with its Mystery symbol. If you land this symbol, either singly or multiple times across the reels, then it will turn into one of the other symbols on the slot at random, and this affords you the chance of a win if you can match it with other symbols on the reels.


  • Low Value – 9, 10, Jack, Queen, King and Ace
  • Higher Value – Red Gem, Blue Gem, Green Gem, Purple Gem
  • Wild – Multicoloured Symbol
  • Scatter – Mystery Box Symbol
  • Other Symbol – Mystery Symbol

Wild Symbol

The Multicoloured symbol on the reels is the Wild symbol in the game and it appears on the middle three reels of the slot alone. However, one positive is that each Wild that lands will offer you a 2x multiplier on top of the standard win. Furthermore, if you were to land more than one, then these multipliers will be combined to give you an even better value win (so land two Wilds on a winning line and the multiplier would be 4x, land three and it would be 8x the standard amount).

Free Spins Bonus

As we mentioned above, the Free Spins bonus on the slot is triggered by landing three of the Mystery Box symbols anywhere across the reels. When you do, you will be handed 7 Free Spins initially and a 1x multiplier for the bonus round. However, you can increase the number of spins you have, and the multiplier you receive by landing more of the Mystery Box Scatters on the reels in the bonus round.

To the left of the reels is a scale which shows you how your number of spins and multipliers can increase from the start amount, up to a multiplier of x50. Furthermore, you can see that each Scatter landed will also award you at least one additional spin and on the 3rd, 7th and 11th Scatter landed, that increases to 3 additional spins. Climb all the way to the top of the scale and you will have 24 Free Spins and a 50x multiplier available to you.

Furthermore when you reach the top of the scale, you can land more free spins by landing more Scatters on any remaining Free Spins you have. Get lucky here and this is where that 12,000x jackpot prize becomes more achievable, if you have fortune on your side.

Other Bonus Features and Information

The other feature of the slot that needs attention is the fact that the game offers a Gamble option on some of the wins in the base game. Land a win here and you can try and gamble the amount won by doubling it up, or you can keep the win as it is and walk away. You are given the opportunity to keep gambling up your money if you win, but be aware, if you lose once then you will lose all the money you have wagered.

There is absolutely no doubt that Big Time Gaming have learned the lessons of the original game, which was criticised at times for offering players some paltry payouts even if they managed to hit some of the top prizes on the first slot in the series. This newer games does feel like it is much more grounded and although it is a mid to higher variance game, you do pick up useful base game wins to keep your bankroll topped up. If you are a fan of the TV show, then I am sure you will like the added twist of the Mystery Box option in this slot.


Editor's Review

Based on the famous TV show, this newly released game expands on the Who Wants to be a Millionaire slots series, offering something different to the previous games. The Millionaire Mystery Box Free Spins bonus is a novel way to do things and the huge multipliers on offer, and the potential for wins of 12,000x your stake make it a game that plenty of people will be keen to play.

Where can I play?bet365 Games
Number of paylines:243
Number of reels:5x3
Is autoplay available?Yes
Game manufacturer:Big Time Gaming