Bonk Boi slot: RTP and max win
Bonk Boi is a high-volatility slot by skygaming on Stake Engine, released 13 Oct 2025. Its base game returns 96.50%, above the median Engine slot (96.02%) and higher than 66% of them. The top payout is 1,000,000× the bet, bigger than 100% of Engine slots. It has 3 bonus buys priced at 40× to 20,000× the bet; the best returns 96.79%, so each buy costs 6.42× the bet on average over the long run. It is the No. 3203 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 v44. "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× | 96.50% | 100,000× | 1 in 3,333,319 | 1 in 6.30 | 1 in 6.30 | 0.04× base | |
| Bonus Hunt | Boosted spin | 2.50× | 96.88% | 100,000× | 1 in 10,000,000 | 1 in 5.56 | 1 in 14 | 0.08× base | |
| Buy Bonk Spins | Bonus buy | 40× | 95.46% | 100,000× | 1 in 100,000 | 1 in 1.04 | 1 in 4.64 | 1.82× base | Simulate |
| Buy Super Bonk Spins | Bonus buy | 200× | 96.79% | 100,000× | 1 in 1,000,000 | – | 1 in 6.12 | 6.42× base | Simulate |
| Horny Jail | Bonus buy | 20,000× | 95.05% | 1,000,000× | 1 in 164 | – | 1 in 4.86 | 989.60× 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 | |
|---|---|---|
| v44 | 96.500% | Active |
| v43 | 96.539% |
Frequently asked
What is the RTP of Bonk Boi?
Base spins return 96.50% of the amount wagered over the long run, from the published outcome table for version 44. Its bonus buys return between 95.05% and 96.79%.
What is the max win in Bonk Boi and how likely is it?
The top payout is 1,000,000× the base bet. On a base spin the top payout of 100,000× lands 1 in 3,333,319 spins. In the Buy Super Bonk Spins buy (200×) 100,000× lands 1 in 1,000,000 buys.
Does Bonk Boi have a bonus buy, and what does it cost?
Yes, 3 buy modes. Buy Bonk Spins: 40× the base bet, 95.46% RTP, an expected cost of 1.82× the base bet per buy. Buy Super Bonk Spins: 200× the base bet, 96.79% RTP, an expected cost of 6.42× the base bet per buy. Horny Jail: 20,000× the base bet, 95.05% RTP, an expected cost of 989.60× the base bet per buy.
Is Bonk Boi high or low volatility?
High. Its base-mode standard deviation is 59.8× 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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