Released: 3 Oct 2019

Play the Millionaire Mystery Box by Big Time Gaming for a chance to sit in the Hot Seat and play the bonus rounds that can take you a 50x multiplier, many free spins and the ultimate Who Wants to Be a Millionaire prizes. The game plays on 243 ways to pay on consecutive reels and has a theoretical RTP of 96.64.

Millionaire Mystery Box  Slot

Millionaire Mystery Box Slot Online

Experience the thrill of sitting in the hot chair on the Millionaire Mystery Box slot. Play for a chance to win up to 12,000x on the winning bet. 

Millionaire Mystery Box Introduction

The Who Wants to Be a Millionaire is one of the most popular franchises in the world of online slots, along with Deal or no Deal and Monopoly. We've lost count of the number of slots under the Millionaire name, but we are sure about one thing - that each one provides a true slots adventure and potential winnings. 

This time, the latest release branded with the colors of Millionaire is the Millionaire Mystery Box slot. Made by the slots experts at Big Time Gaming, surprisingly, this isn't a megaways slots. When it was announced and no screenshots were provided, both players and casino industry heads were certain this is going to be the latest Megaways hit. 

At any rate, we have a solid game of three rows and five reels that spin across 243 ways to pay, a style of play that was the progenitor of the megaways action. The players can win on consecutive reels with a free spins bonus and multipliers that can reach as much as 50x on the total wins. 

The Millionaire Mystery Box slots has a maximum paying potential of 12,000x on the winning bet, arising from a single spin. 

Millionaire Mystery Box Design

Not much has changed and not much could ever possibly change in terms of the design of any Millionaire slot. The Millionaire Mystery Box slot edition has gems for high paying symbols and gem-like high cards, ranging from nine to ace, for the low paying symbols. The background to the reel-set consists of the studio setup the television game show takes place. 

Each winning outcome gets a gloss-over and a light effect, which make up the visual consistency of the previous editions of this game. The players will find the Millionaire tune not obtrusive and not overly pleasant either, and that's because whoever composed the jingle understood the formula to playing a catchy set of notes.

How to Play Millionaire Mystery Box Slot

Big Time Gaming are reputed for offering small bets on their releases. Where £0.25 is usually the starting bet for most contemporary slots BTG have if not all of their slots start at £0.20. 

You can find your way around the settings and controls easily if you have played their slots before, like the Bonanza slot. The bets are selected from the field labeled Stake, by using the left and right arrows. 

The big green and rectangular button is Play and that sends the reels on the Millionaire Mystery Box slot spinning once. The blue square is for the menu, where you can access the game's settings and the paytable and the button to the right of it is for autoplay. 

BTG let you select the number of automatic spins from the available presents (between five and 100) and there are the additional options of setting a total loss limit and a single win limit. 

How to Win Millionaire Mystery Box Slots

The game comes with a number of high paying symbols but their values pale in comparison to many other slots. The balance is struck between this and the mystery box symbol. 

This is the symbol that defines the gameplay. It can occur only on the middle three reels. Its job is to throw in mystery symbols at random and in this regard, everything goes, including the wild and the scatter. 

The wild symbol comes with double on the win multiplier, which makes five of the purple gems return 50x on the bet, while the symbols without the wild will pay half that amount. 

Millionaire Mystery Box Bonus Features

The bonus feature is triggered when you get three or more scatter symbols. Seven initial spins will commence that part of the reel action which extends to the scale that keeps track of the number of scatter symbols stopping on the reel set during the Millionaire Mystery Box slots bonus. 

With each scatter the players get one extra spin, but with every third one the number of extra spins becomes three. Furthermore, each scatter comes with a multiplier. These start at x3 and go through every number until reaching x9. For some reason there isn't a x10 multiplier, or x11, so the scale continues from 12. 

The ultimate, eleventh scatter, brings about the biggest multiplier of x50 plus three extra spins. 

Millionaire Mystery Box Free Play

Big Time Gaming have the habit of withholding their new releases months after they’ve been put on the slots roster of online casinos so it isn’t very likely that players will get to enjoy playing the free play Millionaire Mystery Box slot. But, on the other hand, make several spins with the smallest wager and you can could a sense how the game plays and behaves.

Millionaire Mystery Box Closing Thoughts

We have a famous franchise and a hot new game. Everything is in place for a solid adventure on the reels. The only thing that is needed is your input into the game. 

Try your luck and some of the casinos on this page by claiming one of the welcome offers.

Key Features
  • ProviderBig Time Gaming
  • Reels5
  • Min Bet0.20
  • Max PayoutTBC
  • RTP96.64
  • Paylines243
  • Max Bet20.00
  • Bonus Rounds1
  • VarianceMedium
About The Author

Sanja Tasevska


Sanja is our game expert and uses her knowledge to review all kinds of slot games, both old and new. The detailed reviews include the most important info about a particular slot game. She’s been a part of this industry for many years and so far she’s played and given her opinion on thousands of different slot titles. Contact Sanja

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