Bull Rock slot: RTP and max win
Bull Rock is a low-volatility slot by Ferista Studio on Stake Engine, released 27 Sep 2026. Its base game returns 92.10%, below the median Engine slot (96.02%). The top payout is 15,000× the bet, bigger than 50% of Engine slots; from a base spin it lands about once every 39,999,837 spins. It has 4 bonus buys priced at 50× to 500× the bet; the best returns 92.10%, so each buy costs 3.95× the bet on average over the long run. It is the No. 2411 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× | 92.10% | 15,000× | 1 in 39,999,837 | 1 in 2.68 | 1 in 6.52 | 0.08× base | Simulate |
| Bonus Chance X5 | Boosted spin | 2.00× | 92.10% | 15,000× | 1 in 8,000,018 | 1 in 2.40 | 1 in 6.50 | 0.16× base | Simulate |
| Bonus Chance X10 | Boosted spin | 4.00× | 92.10% | 15,000× | 1 in 4,000,004 | 1 in 2.16 | 1 in 4.37 | 0.32× base | Simulate |
| Bonus Chance X25 | Boosted spin | 10× | 92.10% | 15,000× | 1 in 1,600,000 | 1 in 1.68 | 1 in 2.99 | 0.79× base | Simulate |
| Dancing Fish | Boosted spin | 15× | 92.10% | 454× | 1 in 7,000,000 | 1 in 1.22 | 1 in 3.31 | 1.18× base | Simulate |
| Bass Drop | Bonus buy | 50× | 92.10% | 10,400× | 1 in 7,000,000 | – | 1 in 3.18 | 3.95× base | Simulate |
| Bonus | Bonus buy | 100× | 92.10% | 15,000× | 1 in 250,014 | – | 1 in 3.12 | 7.90× base | Simulate |
| Raid Bonus | Bonus buy | 250× | 92.10% | 15,000× | 1 in 200,000 | – | 1 in 3.54 | 19.75× base | Simulate |
| Super Bonus | Bonus buy | 500× | 92.10% | 15,000× | 1 in 160,000 | – | 1 in 3.05 | 39.50× 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 | |
|---|---|---|
| v3 | 92.100% | Active |
Frequently asked
What is the RTP of Bull Rock?
Base spins return 92.10% of the amount wagered over the long run, from the published outcome table for version 3. All 4 of its bonus buys return 92.10%.
What is the max win in Bull Rock and how likely is it?
The top payout is 15,000× the base bet. On a base spin it lands 1 in 39,999,837 spins. In the Bass Drop buy (50×) 10,400× lands 1 in 7,000,000 buys.
Does Bull Rock have a bonus buy, and what does it cost?
Yes, 4 buy modes. Bass Drop: 50× the base bet, 92.10% RTP, an expected cost of 3.95× the base bet per buy. Bonus: 100× the base bet, 92.10% RTP, an expected cost of 7.90× the base bet per buy. Raid Bonus: 250× the base bet, 92.10% RTP, an expected cost of 19.75× the base bet per buy. Super Bonus: 500× the base bet, 92.10% RTP, an expected cost of 39.50× the base bet per buy.
Is Bull Rock high or low volatility?
Low. Its base-mode standard deviation is 4.2× 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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