MYSTERYBOX
96.21%
RTP
50000x
Max Win
- Reels
- 5
- Rows
- 5
- Paylines (up to)
- 15
- Min Bet
- 0.1
- Max Bet
- 1000
- Release Date
- September 13, 2026
A Stake Engine title, so there is no maker demo to embed here. On Stake it can be played without an account as Demo (Fun Play).
About this Slot
MYSTERYBOX is a carnival-themed slot from Guy Studio with an RTP of 96.21%, high volatility and a maximum win of 50,000x. The game plays across five reels, five rows and 15 paylines.
Mystery Symbols appear on the reels and convert to Sticky Wilds with multipliers ranging from 2x to 1000x when they land.
Three Scatters trigger Bonus Games, awarding eight free spins. During Bonus Games, Mystery Boxes convert into Sticky Wilds on each spin, but the global multiplier resets with each new spin.
Four Scatters trigger Super Bonus, also awarding eight free spins. In Super Bonus, the global multiplier persists and accumulates across spins rather than resetting.
Five Scatters trigger Secret Bonus, awarding eight free spins. Secret Bonus guarantees a minimum of one Mystery Box on every spin, and the global multiplier persists and accumulates throughout the round.
Free spins retrigger by landing additional Scatters during the bonus round, adding extra spins to the remaining total.
Triple Boost increases the chance to trigger free spins by a factor of three and remains active until the player disables it.
Mega Spin guarantees a minimum of one Mystery Box on every spin but cannot trigger free spins.
Bonus Games can be upgraded to Secret Bonus through purchase. Super Bonus can also be upgraded to Secret Bonus through purchase.
MYSTERYBOX Community RTP
Real RTP estimated from rounds contributed by the community, across all uploaders.
No measurements for this slot yet.
Your archive would be the first.
MYSTERYBOX RTP Calculator
MYSTERYBOX has a theoretical RTP of 96.21%. Its volatility is High, so expect long dry spells punctuated by rare, large multipliers. Its win potential is capped at 50000x your stake. Use the calculator below to estimate your expected return, variance range and risk of ruin over any number of spins.
MYSTERYBOX Variance Simulator
MYSTERYBOX sessions can swing far from its 96.21% average - its volatility is rated High. The simulator runs many virtual bankroll runs to estimate the bust rate, typical drawdown and best/worst outcomes over a set number of spins - compare a cautious bankroll against an aggressive one.
All Wins
No wins on this slot yet.
Play on Stake*Frequently asked questions about MYSTERYBOX
An RTP of 96.21% means MYSTERYBOX is built to pay back around 96.21 for every 100 wagered over millions of spins. Any single session can land far above or below that - use the RTP calculator on this page to model your own bet size and spin count.
Over the long run MYSTERYBOX's house edge is about 3.79% of everything you wager - roughly 3.79 lost per 100 staked. Short sessions vary widely; the calculator above shows the expected loss and variance range for your inputs.
Quite a lot. Because wins cluster around rare big hits, your balance can move far from the 96.21% average in either direction. The variance simulator above shows typical drawdowns, bust rate and best/worst outcomes for your bankroll.
It depends on your bet size and how long you want to play MYSTERYBOX. Use the variance simulator above to test a cautious versus an aggressive bankroll and see how often each survives your target number of spins.
