Who Wants To Be A Millionaire Mystery Box

It takes some getting used to, a Big Time Gaming slot machine without Megaways. Who Wants To Be A Millionaire Mystery Box has five reels of three symbols high. That provides 243-ways-to-win, just like on many Microgaming slots.
The stake is a minimum of €0.10 per spin and a maximum of €40 per spin. That is 10 credits, which means a minimum of € 0.01 and a maximum of € 4 per credit.
Big Time Gaming slots usually don't have to rely on the graphics. So does Who Wants To Be A Millionaire Mystery Box. The premium symbols are some shiny stones, similar to the Starburst stones. The purple stone is the only symbol that pays from two pieces. It is also the highest paying symbol with 25 credits per five combinations. Furthermore, there are red, blue and green gems. And of course you can't escape the playing card symbols either. There are six of them, starting at the 9 and going up to the Ace.

On the middle three reels you can spin an X2 Wild. And it does exactly what it promises. This symbol is a joker for the playing cards and the four stones. Wins you spin thanks to this X2 Wild are also paid out twice. For example, a combination of four purple stones and a x2 Wild is good for 50 credits instead of 25 credits.
The Mystery Box works the same as the mystery symbols on slot machines such as Mystery Reels Power Reels, Mystery Reels Megaways and Mystery Reels. The Mystery Boxes - blue boxes with a question mark on them - change into another symbol. All Mystery Boxes change into one and the same symbol during a spin. The Mystery Box is really only fun if the random number generator conjures up the X2 Wild from the box.

Who Wants To Be A Millionaire Mystery Box also has a gamble feature. This gamble feature is a permanent fixture on Endorphina, Betsoft, EGT, Amatic and Novomatic slots. And is therefore also on this Big Time Gaming slot.
You can double your winnings up to 5 times in a row. You have a 50% chance each time you double. And a 50% chance that you will lose your winnings again.

You trigger the bonus spins with the 'Who Wants To Be A Millionaire' symbol. You need three or more to unlock bonus spins. Three symbols give you 7 bonus spins, four symbols are good for 12 bonus spins and five of these logos are good for 20 bonus spins.
You play the free spins with a 'Multiplier Ladder'. You start with a multiplier of x2. So all winnings times two. And that only gets better. Each scatter symbol you spin during the bonus will give you a step up the ladder. The first step is a multiplier of x3 and 1 extra spin. And then it gets more fun.
In total you can earn 17 extra spins and you end up with a multiplier of no less than 30 times. A combination of five purple stones is then good for 750 credits. You can take as much as 12,000 times your stake per bonus spin!