Millionaire Mystery Box

Millionaire Mystery Box

Play Millionaire Mystery Box slot & deposit by phone bill & Pay By Mobile Casino

Play Button

Game Overview

Millionaire Mystery Box is a five-reel video slot created by Big Time Gaming. The game offers 243 ways to win, providing multiple opportunities for different symbol combinations across the reels.

Choosing Your Bet

To select your bet amount, use the left and right arrow buttons located on the stake display. The current stake is always clearly shown, ensuring you know the amount for each round. All prizes and payouts are calculated by multiplying the displayed stake by the relevant win amount for that spin.

Gameplay Mechanics

Initiate the game round by pressing the Play button. The five reels will spin and stop to reveal the result for that round based on the symbols displayed. Any wins are automatically awarded according to the paytable and stake.

x2 Wild Feature

The Wild symbol can land on reels 2, 3, and 4. This symbol can substitute for any other symbol except the Scatter. When one or more Wilds appear in a winning combination, the win value is doubled for each Wild present.

Mystery Box™ Symbol

The Mystery Box symbol may appear on reels 2, 3, and 4. When it lands, it opens to reveal a random symbol. If 2 or 3 Mystery Box symbols are present after a spin, they will all transform into the same symbol type. Win calculations are completed after all Mystery Box symbols have changed.

Gamble Feature

After any winning spin, the Gamble button becomes available. This feature allows you to risk your winnings for a chance to double them, up to five consecutive times per win. In certain circumstances, the Gamble feature might be disabled.

Scatter and Free Spins

The Millionaire Scatter symbol awards free spins. Landing 3, 4, or 5 Scatter symbols triggers 7, 12, or 20 Free Spins respectively. Scatters pay in any position.

Multiplier Ladder During Free Spins

When free spins are activated, a Multiplier Ladder with 12 rungs becomes active. Activating with 3, 4, or 5 Scatters starts the ladder at rung 1, 2, or 3 accordingly. Each win during Free Spins is multiplied by the current Multiplier shown on the ladder.

  • Each additional Scatter found during Free Spins advances the Multiplier Ladder by one rung.
  • Every rung climbed grants one extra Free Spin—except for rungs 4, 8, and 12, which each provide three extra Free Spins.

Return to Player

The Return to Player (RTP) describes the theoretical proportion of all wagers that is paid out as winnings over time. This value is based on extensive simulations performed by the provider. The in-game display shows the RTP value for your reference.


🎰 You May Also Like: Neon Villains Doublemax | Diamonds of the Realm | Action Bank


*All values (Bet Levels, Maximum Wins etc.) mentioned in relation to this slot game are subject to change at any time. Game features mentioned may not be available in some jurisdictions.