Storm Bubble slot: RTP and max win
Storm Bubble is a high-volatility slot by VOIDMOON on Stake Engine, released 28 Jul 2026. Its base game returns 95.80%, below the median Engine slot (96.02%). The top payout is 25,000× the bet, bigger than 81% of Engine slots. It has 4 bonus buys priced at 100× to 500× the bet; the best returns 96.36%, so each buy costs 9.11× the bet on average over the long run. It is the No. 6524 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× | 95.80% | 15,000× | 1 in 350,000 | 1 in 1.75 | 1 in 8.24 | 0.04× base | Simulate |
| Bonus Ante10 | Boosted spin | 10× | 96.15% | 15,000× | 1 in 21,429 | 1 in 2.38 | 1 in 7.23 | 0.38× base | Simulate |
| Bonus Rush | Bonus buy | 100× | 95.66% | 15,000× | 1 in 10,000 | every round | 1 in 4.15 | 4.34× base | Simulate |
| Bonus Surge | Bonus buy | 250× | 96.36% | 15,000× | 1 in 50,000 | every round | 1 in 4.27 | 9.11× base | Simulate |
| Bonus Ante500 | Bonus buy | 500× | 95.99% | 25,000× | 1 in 8,333 | – | 1 in 3.73 | 20.04× base | Simulate |
| Bonus Storm | Bonus buy | 500× | 95.97% | 25,000× | 1 in 7,143 | – | 1 in 3.88 | 20.15× base | Simulate |
Work out the cost of Storm Bubble 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 | |
|---|---|---|
| v3 | 95.798% | Active |
Frequently asked
What is the RTP of Storm Bubble?
Base spins return 95.80% of the amount wagered over the long run, from the published outcome table for version 3. Its bonus buys return between 95.66% and 96.36%.
What is the max win in Storm Bubble and how likely is it?
The top payout is 25,000× the base bet. On a base spin the top payout of 15,000× lands 1 in 350,000 spins. In the Bonus Surge buy (250×) 15,000× lands 1 in 50,000 buys.
Does Storm Bubble have a bonus buy, and what does it cost?
Yes, 4 buy modes. Bonus Rush: 100× the base bet, 95.66% RTP, an expected cost of 4.34× the base bet per buy. Bonus Surge: 250× the base bet, 96.36% RTP, an expected cost of 9.11× the base bet per buy. Bonus Ante500: 500× the base bet, 95.99% RTP, an expected cost of 20.04× the base bet per buy. Bonus Storm: 500× the base bet, 95.97% RTP, an expected cost of 20.15× the base bet per buy.
Is Storm Bubble high or low volatility?
High. Its base-mode standard deviation is 29.8× 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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