Who Wants To Be A Millionaire Mystery Box

By Becky M. | Updated 13 November 2024

It’s time to dim the lights, sit in the hot seat and play Who wants to be a Millionaire Mystery Box from Big Time Gaming. The game comes with Mystery symbols, 2x wilds that multiply together, Free spins and multipliers of up to 50x.

About

Who wants to be a millionaire Mystery Box is a 5 reel, 243 ways to win video slot, playable from 20p to £100 across all devices. The game is medium variance with an RTP of 96.64%. The game has bright illuminated graphics and the soundtrack is the same as the tv gameshow.

Who Wants to be a Millionaire Mystery Box is obviously based on the UK tv game show, set in a dimly lit studio with neon lights.

Transparent reels are filled with brightly coloured symbols including, 9 to the A card royals, red, green, blue and purple gems which are the highest paying and will give you 25x your stake for 5. The Wild is a 2x multi-coloured symbol, it will replace all symbols except the scatter, it will only appear on the three central reels and will double all your wins.

Slot Bonus Features

Mystery Box Reveal feature – this can be triggered at random and can reveal any symbol including the scatter or the wild.

Gamble feature – after a win, you have the option to double it, you can keep going until you reach the maximum win.

Free Spins feature – this is triggered when you get 3 or more scatters which is the games logo and you will be given 7 free spins. There is a free spins ladder to the left of the reels, each scatter that falls during a free spin will climb up the multiplier ladder 1 step and you will get an extra free spin

1 scatter = 1 extra free spin with the multiplier increasing to 3x

1 more scatter = 1 extra free spin with the multiplier increasing to 4x

1 more scatter = 3 extra free spins with the multiplier increasing to 5x

1 more scatter = 1 extra free spin with the multiplier increasing to 6x

1 more scatter = 1 extra free spin with the multiplier increasing to 7x

1 more scatter = 1 extra free spin with the multiplier increasing to 8x

1 more scatter = 3 extra free spins with the multiplier increasing to 10x

1 more scatter = 1 extra free spin with the multiplier increasing to 12x

1 more scatter = 1 extra free spin with the multiplier increasing to 15x

1 more scatter = 1 extra free spin with the multiplier increasing to 30x

1 more scatter = 3 extra free spins with the multiplier increasing to 50x

So, you can collect 11 scatters and get 17 extra free spins, this gives a total of 24 free spins.

We really enjoyed Who wants to be a Millionaire Mystery Box, the graphics are great with its dark studio and illuminated seating areas. Brightly coloured symbols on transparent reels looks great and the original soundtrack brings the game to life. The bigger wins will come from the increasing multiplier during the Free Spins feature. You could see wins of up to a huge 12,000x your stake on every free spin.

Becky M.

Founder & Editor-in-Chief at Slotfruit

Rebecca (Becky) Mosley has been at the heart of the UK online gambling industry since 2008 – making her one of the most experienced voices in the space. She founded Take Marketing Limited and built SlotFruit.co.uk into one of the longest-running independent casino comparison sites in the country.

As editor-in-chief, Becky brings a genuine player-first perspective to everything on the site. She personally oversees every casino review and slot guide, making sure readers get straight-talking, honest information rather than marketing fluff. Her approach has always been the same: transparency, fair bonus terms, and responsible gambling above all else.

Over 17 years in the industry, Becky has built deep expertise across UK Gambling Commission licensing, slot game mechanics, bonus structures, and the constantly evolving regulatory landscape. She works directly with operators and software providers to keep every listing accurate and up to date.

Becky is a Companies House registered director (Take Marketing Limited, company no. 07619813) and is based in Lincolnshire, England.

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