Millionaire Mystery Box
This Big Time Gaming release adapts the popular television quiz show into a slot structure offering two hundred forty-three payment paths. Base gameplay includes special random boxes that reveal matching icons, wilds, or scatter symbols. The main bonus round features a progressive trail where gathering more scatters rewards participants with growing multipliers and extra spins. Additionally, users can choose to risk their entire bonus payout in a special double-up mini-game.
RTP published by the studio / Millionaire Mystery Box
96.64%
Scale starts at 95% · other versions not published
Figures: Big Time Gaming game page, checked October 6, 2026; each value is linked to its page in the game facts table. Artwork © Big Time Gaming; image file from the Slots-Info slot database, not supplied by the studio.
Game facts
| Metric | Value |
|---|---|
| Studio | Big Time Gaming1 |
| RTP versions | 96.64%1 |
| Other RTP versions | Not published by the studio |
| Volatility | Not published |
| Max win | Not published |
| Bet range | Not published |
| Layout | 243 ways1 |
| Features | Mystery Box, Double Up Gamble, Free Spins Ladder1 |
| Bonus buy | Not published |
| Release date | Not published by the studio |
Numbers link each value to the page it comes from. “Not published” means the studio does not state it; we add it when it does and never estimate a spec. Figures from casino sites are not used.
RTP versions
Big Time Gaming publishes one RTP setting for Millionaire Mystery Box: 96.64%. Other RTP versions are not published by the studio. Check the game’s help or paytable screen at your casino to see which version it runs.
| RTP version | House edge | Return per $100, long run | vs highest |
|---|---|---|---|
| 96.64% (highest) | 3.36% | $96.64 | — |
House edge = 100% minus RTP. RTP is a long-run average across all players, not a prediction for a session.
Features
- Mystery Box
- Double Up Gamble
- Free Spins Ladder
Where it’s available
Not confirmed. Availability in regulated North American markets is not confirmed yet.
Regulated markets only; availability varies by casino.
