Mushroom Madness slot: RTP and max win
Mushroom Madness is a high-volatility slot by Meta Gaming on Stake Engine, released 25 Jul 2026. Its base game returns 96.70%, above the median Engine slot (96.02%) and higher than 86% of them. The top payout is 50,000× the bet, bigger than 97% of Engine slots; from a base spin it lands about once every 2,000,000 spins. It has 3 bonus buys priced at 250× to 1,000× the bet; the best returns 96.70%, so each buy costs 8.25× the bet on average over the long run. It is the No. 118 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 v27. "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× | 96.70% | 50,000× | 1 in 2,000,000 | 1 in 5.00 | 1 in 12 | 0.03× base | Simulate |
| Ante | Boosted spin | 3.00× | 96.70% | 50,000× | 1 in 400,000 | 1 in 10 | 1 in 28 | 0.10× base | |
| Super Spins | Boosted spin | 10× | 96.70% | 50,000× | 1 in 45,045 | 1 in 20 | 1 in 48 | 0.33× base | |
| Super Bonus | Bonus buy | 250× | 96.70% | 50,000× | 1 in 4,000 | – | 1 in 3.76 | 8.25× base | Simulate |
| Mystery Madness | Bonus buy | 500× | 96.70% | 50,000× | 1 in 966 | 1 in 2.22 | 1 in 4.94 | 16.50× base | Simulate |
| Wild Coin | Bonus buy | 1,000× | 96.70% | 50,000× | 1 in 500 | 1 in 2.39 | 1 in 5.59 | 33.00× base |
Work out the cost of Mushroom Madness bonus buys at your bet size
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 | |
|---|---|---|
| v27 | 96.700% | Active |
| v26 | 96.700% |
Frequently asked
What is the RTP of Mushroom Madness?
Base spins return 96.70% of the amount wagered over the long run, from the published outcome table for version 27. All 3 of its bonus buys return 96.70%.
What is the max win in Mushroom Madness and how likely is it?
The top payout is 50,000× the base bet. On a base spin it lands 1 in 2,000,000 spins. In the Super Bonus buy (250×) 50,000× lands 1 in 4,000 buys.
Does Mushroom Madness have a bonus buy, and what does it cost?
Yes, 3 buy modes. Super Bonus: 250× the base bet, 96.70% RTP, an expected cost of 8.25× the base bet per buy. Mystery Madness: 500× the base bet, 96.70% RTP, an expected cost of 16.50× the base bet per buy. Wild Coin: 1,000× the base bet, 96.70% RTP, an expected cost of 33.00× the base bet per buy.
Is Mushroom Madness high or low volatility?
High. Its base-mode standard deviation is 59.7× 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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