Who Wants to be a Millionaire Mystery Box Review

Our score 4.0 4.0 /5
User rating

Who wouldn’t love to be a millionaire? Just think – you could get up when you want, spend all day doing exactly what you want and then go to bed when you want.

No. of Reels 5
Game type Video Slot
Bonus Rounds Yes
Software provider Big Time Gaming
Scatter Yes
Free spins Yes
Updated November 9, 2023


Play Who Wants to Be a Millionaire Mystery Box at these suggested casinos

Our recommendation

Grosvenor Casinos

1 2 3 4 5
Welcome bonus Deposit £20, Play with £50

*18+. New customers only. Min deposit £20. Paypal excluded. Max non-withdrawable bonus £30. Playable on selected games only. 30x dep and bonus wagering required. Expires within 30 days. Max win £2,000. T&Cs apply. Please play responsibly. Gambleaware.org #AD

Bacana Play

1 2 3 4 5
Welcome bonus Get 100 Free Spins

18+.First Deposit Only. Game: Big Bass Bonanza, Spin Value: £0.10, Max Free Spins: 100. WR 60x free spin winnings amount (only Slots count) within 30 days. Max bet is 10% (min £0.10) of the free spin winnings amount or £5 (lowest amount applies). Spins must be used and/or Bonus must be claimed before using deposited funds. Deposit/Welcome Bonus can only be claimed once every 72 hours across all Casinos. Bonuses do not prevent withdrawing deposit balance. *Games are subject to availability. Bonus Policy applies. Please gamble responsibly. Gambleaware.org #AD

Spin Rider

1 2 3 4 5
Welcome bonus Deposit £25, Get 100 Bonus Spins

*18+. New players only. Min. deposit £25. Max. bonus bet is £5. Welcome offer is 100 bonus spins on BIG Bass Splash on your 1st deposit. Winnings from Bonus spins credited as bonus funds and capped at £100. Bonus funds are separate to Cash funds, and are subject to 35x wagering the total bonus & cash. Only bonus funds count towards wagering contribution. Bonus funds must be used within 30 days, spins within 72hrs. Affordability checks apply. Terms apply. Gambleaware.org. Please gamble responsibly. #AD

Of course, non-millionaires can do that too, although paying the bills becomes a problem if you do that too often!

A few people have become millionaires thanks to the Who Wants to be a Millionaire quiz show that was once required viewing. Hosted in the UK by ex-Tiswas lead dude Chris Tarrant, the show ran in the UK from 1998 until 2014. It has now been revived, hosted by gammon-faced pistol-head Jeremy Clarkson. The show has versions too in countries all over the world.

This slot from Big Time Gaming will not make you a millionaire, but it is one of the best online slots games that we at WhichBingo have seen in a long time.

How to Play

It’s the standard setup when it comes to the Who Wants to be a Millionaire Mystery Box online video slot with five reels and three rows. There are no paylines in the traditional sense, as you only need to land identical symbols on consecutive reels in order to win. All winning combinations need to start upon the left-hand reel, and consist of three symbols at the bare minimum.

You select a stake-per-spin, as opposed to a coin value. This stake can be as low as 0.10, or as high as 40.00. Use the selectors in the bottom left-hand corner of the screen to choose your bet size, then click the ‘play’ button on the right to start the reels spinning.

A colourful ‘x2’ symbol counts as the wild symbol in this game and substitutes for all symbols aside from the scatter symbol. All wins that contain this wild symbol are doubled.

  • 5 x Purple Gem symbols = 25 x stake (max £1,000)
  • 5 x Red Gem symbols = 3 x stake (max £120)
  • 5 x Blue Gem symbols = 2.5 x stake (max £100)
  • 5 x Green Gem symbols = 2 x stake (max £80)
  • 5 x Ace symbols = 1 x stake (max £40)
  • 5 x King symbols = 1 x stake (max £40)
  • 5 x Queen symbols = 0.7 x stake (max £28)
  • 5 x Jack symbols = 0.7 x stake (max £28)
  • 5 x Ten symbols = 0.6 x stake (max £24)
  • 5 x Nine symbols = 0.6 x stake (max £24)


The jackpot for this game is ONE MILLION POUNDS! Only kidding … this game does not have a progressive jackpot. The most you can win is £50,000 at max bet level for five Purple Gem symbols with a x50 multiplier during free spins.

Bonus features

Mystery Box

The mystery box symbol appears on reels 2, 3 and 4. When it lands, the mystery box will open to reveal any of the paytable symbols.

Gamble Feature

All prizes can be gambled. If you select the gamble feature you will be presented with a ladder of six potential gamble amounts. Each successful gamble climbs you up one step of the ladder until you reach the top. If you play an unsuccessful gamble then you lose all. You can quit at any time by clicking the ‘collect’ button.


The familiar ‘Who Wants to be a Millionaire’ logo appears in this game as the scatter symbol. If you land three scatters anywhere you earn seven three spins. Landing four earns you a dozen free spins and five earns you the maximum of twenty.

Free spins

During free spins the Free Spins Multiplier comes into play. This sits at the edge of the screen and commences at x2. Every scatter that lands edges the meter up one, until the top of the ladder is reached at x50. All prizes during free spins are multiplied by the current state of the free spins multiplier.

Every time you climb the ladder an additional free spin is awarded except on rungs 4, 8 and 12 upon which three additional free spins are awarded. If you make it to the top then every scatter that lands awards an additional free spin.

Graphics and Sounds

The music and sounds used during this game are so good you’d swear you were watching an episode of ‘WWTBAM’ while you are playing. All the familiar noises from the TV show are used, including the theme tune which plays while the reels are spinning.

The reels themselves cover the ‘WWTBAM’ studio, which is all lit up but nobody has turned up to watch! The rest of the graphics simply get the job done.


Okay, so this slot is very unlikely to make you a millionaire, but that shouldn’t really put you off playing it. This is a decent effort indeed from Big Time Gaming, and a worthy companion to one of the world’s most famous TV quiz programmes.

Who wants to play Who Wants to Be a Millionaire at one of WhichBingo’s many recommended bingo sites, slots and casino sites? You do, of course!

Better change
Anita Heffernan Whichbingo Author

Author And Managing Editor

Anita Heffernan

Anita is well-known and respected within the online bingo industry, she loves all things bingo and slots and has been involved with online bingo and gambling sites since the late 1990’s. She has been the full-time writer and Editor of WhichBingo for much of that time and is respected by operators and players alike for her no-nonsense judgments and opinions. Anita has seen the highs and lows of the industry she loves, has seen it grow and develop and contract again into what it is today. She has worked with the biggest names in the industry and has a reputation for being fair and to the point in her writing.

User Reviews

Based on 0 reviews