MADBOX slot: RTP and max win
MADBOX is a high-volatility slot by GUY STUDIO on Stake Engine, released 19 Mar 2026. Its base game returns 96.21%, above the median Engine slot (96.02%) and higher than 60% of them. The top payout is 20,000× the bet, bigger than 59% of Engine slots; from a base spin it lands about once every 2,000,000 spins. It has 4 bonus buys priced at 25× to 1,000× the bet; the best returns 96.21%, so each buy costs 0.95× the bet on average over the long run. It is the No. 6205 most played Engine slot over the last 30 days.
Every mode, side by side
Costs are multiples of the base bet. Odds come from the published outcome table for v3. "Returns the cost" counts rounds that pay back at least what the mode cost. Expected cost is cost × (1 − RTP): the average amount lost per round over the long run.
| Mode | Type | Cost | RTP | Max win | Max win odds | Pays anything | Returns the cost | Expected cost per round | |
|---|---|---|---|---|---|---|---|---|---|
| Base | Base spin | 1.00× | 96.21% | 20,000× | 1 in 2,000,000 | 1 in 2.96 | 1 in 11 | 0.04× base | Simulate |
| Triple Boost | Boosted spin | 2.00× | 96.21% | 20,000× | 1 in 2,000,000 | 1 in 2.88 | 1 in 18 | 0.08× base | Simulate |
| A1 | Bonus buy | 25× | 96.21% | 20,000× | 1 in 320,000 | 1 in 1.60 | 1 in 10 | 0.95× base | Simulate |
| Bonus | Bonus buy | 100× | 96.21% | 20,000× | 1 in 80,001 | every round | 1 in 3.53 | 3.79× base | Simulate |
| Superbonus | Bonus buy | 200× | 96.21% | 20,000× | 1 in 20,000 | – | 1 in 3.26 | 7.58× base | Simulate |
| Megabonus | Bonus buy | 1,000× | 96.21% | 20,000× | 1 in 4,000 | – | 1 in 2.60 | 37.90× base | Simulate |
Version history
Base-mode RTP per published math version. Older versions stay public in the fairness API, so changes can be checked.
| Version | Base RTP | |
|---|---|---|
| v3 | 96.210% | Active |
Frequently asked
What is the RTP of MADBOX?
Base spins return 96.21% of the amount wagered over the long run, from the published outcome table for version 3. All 4 of its bonus buys return 96.21%.
What is the max win in MADBOX and how likely is it?
The top payout is 20,000× the base bet. On a base spin it lands 1 in 2,000,000 spins. In the A1 buy (25×) 20,000× lands 1 in 320,000 buys.
Does MADBOX have a bonus buy, and what does it cost?
Yes, 4 buy modes. A1: 25× the base bet, 96.21% RTP, an expected cost of 0.95× the base bet per buy. Bonus: 100× the base bet, 96.21% RTP, an expected cost of 3.79× the base bet per buy. Superbonus: 200× the base bet, 96.21% RTP, an expected cost of 7.58× the base bet per buy. Megabonus: 1,000× the base bet, 96.21% RTP, an expected cost of 37.90× the base bet per buy.
Is MADBOX high or low volatility?
High. Its base-mode standard deviation is 26.9× the bet, which puts it in the highest third of Engine games. What volatility means.
Can I check that a result was fair?
Yes. Engine games use provably fair seeds. Once your server seed is revealed you can replay any round against the published outcome table. See how to verify a result.
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