Whirlpool slot: RTP and max win
Whirlpool is a medium-volatility slot by Void Studios on Stake Engine, released 12 Oct 2026. Its base game returns 96.70%, above the median Engine slot (96.02%) and higher than 86% 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 18,993,355 spins. It has 5 bonus buys priced at 100× to 1,000× the bet; the best returns 96.70%, so each buy costs 3.30× the bet on average over the long run. It is the No. 305 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 v6. "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% | 20,000× | 1 in 18,993,355 | 1 in 2.73 | 1 in 4.68 | 0.03× base | Simulate |
| Extra Chance | Boosted spin | 2.50× | 96.70% | 20,000× | 1 in 3,750,586 | 1 in 2.64 | 1 in 12 | 0.08× base | Simulate |
| Deep Waters | Bonus buy | 100× | 96.70% | 20,000× | 1 in 125,000 | – | 1 in 4.32 | 3.30× base | Simulate |
| Abyss Strikes | Bonus buy | 200× | 96.70% | 20,000× | 1 in 83,333 | – | 1 in 3.58 | 6.60× base | Simulate |
| Risky Spin | Bonus buy | 500× | 96.70% | 20,000× | 1 in 1,071 | – | 1 in 4.44 | 16.50× base | Simulate |
| All Or Nothing | Bonus buy | 1,000× | 96.70% | 20,000× | 1 in 21 | 1 in 21 | 1 in 21 | 33.00× base | Simulate |
| Krakens Fury | Bonus buy | 1,000× | 96.70% | 20,000× | 1 in 2,000 | – | 1 in 3.13 | 33.00× 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 | |
|---|---|---|
| v6 | 96.700% | Active |
Frequently asked
What is the RTP of Whirlpool?
Base spins return 96.70% of the amount wagered over the long run, from the published outcome table for version 6. All 5 of its bonus buys return 96.70%.
What is the max win in Whirlpool and how likely is it?
The top payout is 20,000× the base bet. On a base spin it lands 1 in 18,993,355 spins. In the Deep Waters buy (100×) 20,000× lands 1 in 125,000 buys.
Does Whirlpool have a bonus buy, and what does it cost?
Yes, 5 buy modes. Deep Waters: 100× the base bet, 96.70% RTP, an expected cost of 3.30× the base bet per buy. Abyss Strikes: 200× the base bet, 96.70% RTP, an expected cost of 6.60× the base bet per buy. Risky Spin: 500× the base bet, 96.70% RTP, an expected cost of 16.50× the base bet per buy. All Or Nothing: 1,000× the base bet, 96.70% RTP, an expected cost of 33.00× the base bet per buy. Krakens Fury: 1,000× the base bet, 96.70% RTP, an expected cost of 33.00× the base bet per buy.
Is Whirlpool high or low volatility?
Medium. Its base-mode standard deviation is 17.6× the bet, which puts it in the middle 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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