Who Wants to Be a Millionaire Mystery Box

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Rules and Gameplay

Who Wants to Be a Millionaire Mystery Box is a thrilling slot game that brings the excitement of the iconic TV game show to the casino world. Developed by Big Time Gaming, this slot operates on a 5×3 reel layout with 243 ways to win, making it accessible to a broad range of players. The game is playable with bets ranging from $0.10 to $40 per spin, catering to both high rollers and casual players alike. The objective is to match symbols from left to right across the reels, with various special symbols triggering bonus features and increasing winning potential.

Bonus Features

The game is packed with engaging bonus features designed to boost your chances of winning big:

  • Mystery Box Feature: Appears on the three central reels and can transform into any symbol, including wilds and scatters, to help create winning combinations.
  • Wild Symbols: Represented by a 2x multicolored symbol, appearing only on reels 2, 3, and 4. They double all wins they’re part of and can multiply each other if more connect.
  • Free Spins: Triggered by landing three or more scatter symbols. Starts with 7 free spins and includes a ladder system where collecting scatters increases the multiplier up to 50x and adds extra spins.
  • Gamble Feature: Offers the chance to double winnings by gambling them on a risk/reward basis.

These features not only enhance the gameplay but also faithfully capture the essence of the game show, adding an extra layer of excitement for fans and players.


The symbols in Who Wants to Be a Millionaire Mystery Box are a mix of classic game show elements and traditional slot symbols:

  • High-Value Symbols: Colored gemstones (purple, red, blue, green) with the purple gemstone offering the highest payout.
  • Low-Value Symbols: Standard card symbols (9 through Ace).
  • Special Symbols: Wilds (2x multicolored symbol), Scatters (Millionaire logo), and Mystery Boxes.

Each symbol plays a crucial role in the gameplay, with special symbols activating the game’s bonus features for bigger wins.


The payout structure of Who Wants to Be a Millionaire Mystery Box is designed to offer substantial rewards:

Symbol 3 Symbols 4 Symbols 5 Symbols
Purple Gemstone x5 x10 x25
Red Gemstone x3 x5 x10
Blue Gemstone x2 x4 x8


Who Wants to Be a Millionaire Mystery Box utilizes a 243 ways to win system instead of traditional paylines, meaning players can form winning combinations as long as matching symbols appear on adjacent reels from left to right. This innovative approach not only simplifies the gameplay but also increases the chances of winning, providing a dynamic and engaging experience for all players.

Pros & Cons

Pros Cons
Authentic game show experience with thematic elements. High volatility may deter casual players.
Diverse bonus features enhance gameplay. Limited maximum bet could dissuade high rollers.
Playable on a wide range of devices. Does not offer a progressive jackpot.

Minimum and Maximum Bet

The betting range of Who Wants to Be a Millionaire Mystery Box is designed to accommodate both conservative players and those looking to stake more. With a minimum bet of $0.10, it ensures that players on a budget can enjoy the game. Conversely, the maximum bet is set at $40, offering ample opportunity for those wishing to increase their stake in hopes of higher payouts.

Game Jackpot

Though the game lacks a traditional progressive jackpot, it compensates with a compelling max win of up to 12,000 times the player’s stake. The RTP stands at an attractive 96.36%, paired with a high variance level. This combination promises the potential for significant wins, albeit less frequently, making each spin a thrilling prospect.

About Provider

Big Time Gaming, the powerhouse behind Who Wants to Be a Millionaire Mystery Box is celebrated for pushing the boundaries of slot gaming. Pioneers of the revolutionary Megaways mechanic, they have a reputation for delivering high-quality, innovative gaming experiences. Known for their detailed graphics and engaging gameplay, Big Time Gaming slots are a staple in the online casino world.

How To Play

  1. Open the game in your chosen online casino.
  2. Adjust your bet size to suit your bankroll, using the controls provided.
  3. Review the paytable for an understanding of winning combinations and features.
  4. Hit the spin button to start playing.
  5. Engage with the game’s bonus features for additional chances to win.
  6. Utilize the gamble feature, if you’re feeling lucky, to potentially double your wins.
  7. Monitor your bankroll and play responsibly, adjusting your bets as necessary.


Who Wants to Be a Millionaire Mystery Box is a testament to Big Time Gaming’s ability to create engaging and rewarding slots. With its homage to the iconic TV show, varied bonus features, and significant payout potential, it offers a comprehensive and thrilling gaming experience. The game’s broad betting range makes it accessible to all types of players, while its high variance appeals to those seeking big wins. As such, it stands as a compelling option for anyone looking to enjoy a high-quality slot game.