Extreme Keno slot: RTP and max win
Extreme Keno is a low-volatility slot by Bolly Games on Stake Engine, released 12 Jan 2026. Its base game returns 96.38%, above the median Engine slot (96.02%) and higher than 64% of them. The top payout is 17,008× the bet, bigger than 50% of Engine slots. It has 1 bonus buy priced at 100× the bet; the best returns 96.68%, so each buy costs 3.32× the bet on average over the long run. It is the No. 2444 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 v4. "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 | |
|---|---|---|---|---|---|---|---|---|---|
| Choose 3 | Base spin | 1.00× | 96.38% | 96× | 1 in 2,000 | 1 in 3.89 | 1 in 3.89 | 0.04× base | Simulate |
| Choose 4 | Base spin | 1.00× | 96.49% | 225× | 1 in 8,333 | 1 in 3.41 | 1 in 3.41 | 0.04× base | Simulate |
| Choose 5 | Base spin | 1.00× | 96.19% | 280× | 1 in 1,562 | 1 in 2.67 | 1 in 7.81 | 0.04× base | Simulate |
| Bonus Buy | Bonus buy | 100× | 96.68% | 17,008× | 1 in 100,000 | 1 in 1.17 | 1 in 3.67 | 3.32× base | Simulate |
Work out the cost of Extreme Keno 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 | |
|---|---|---|
| v4 | 96.377% | Active |
Frequently asked
What is the RTP of Extreme Keno?
Base spins return 96.38% of the amount wagered over the long run, from the published outcome table for version 4. Its bonus buy returns 96.68%.
What is the max win in Extreme Keno and how likely is it?
The top payout is 17,008× the base bet. On a base spin the top payout of 96× lands 1 in 2,000 spins. In the Bonus Buy buy (100×) 17,008× lands 1 in 100,000 buys.
Does Extreme Keno have a bonus buy, and what does it cost?
Yes, 1 buy mode. Bonus Buy: 100× the base bet, 96.68% RTP, an expected cost of 3.32× the base bet per buy.
Is Extreme Keno high or low volatility?
Low. Its base-mode standard deviation is 4.4× the bet, which puts it in the lowest 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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