Reef Rumble slot: RTP and max win
Reef Rumble is a low-volatility slot by Dahlia on Stake Engine, released 14 May 2026. Its base game returns 96.30%, above the median Engine slot (96.02%) and higher than 61% of them. The top payout is 10,000× the bet; from a base spin it lands about once every 1,000,000 spins. It has 1 bonus buy priced at 200× the bet; the best returns 96.30%, so each buy costs 7.40× the bet on average over the long run. It is the No. 5228 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 v2. "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× | 96.30% | 10,000× | 1 in 1,000,000 | 1 in 3.44 | 1 in 12 | 0.04× base | Simulate |
| Boost | Boosted spin | 5.00× | 96.30% | 10,000× | 1 in 200,000 | 1 in 2.98 | 1 in 14 | 0.19× base | Simulate |
| Bonus | Bonus buy | 200× | 96.30% | 10,000× | 1 in 5,000 | every round | 1 in 3.56 | 7.40× base | Simulate |
Work out the cost of Reef Rumble 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 | |
|---|---|---|
| v2 | 96.300% | Active |
Frequently asked
What is the RTP of Reef Rumble?
Base spins return 96.30% of the amount wagered over the long run, from the published outcome table for version 2. Its bonus buy returns 96.30%.
What is the max win in Reef Rumble and how likely is it?
The top payout is 10,000× the base bet. On a base spin it lands 1 in 1,000,000 spins. In the Bonus buy (200×) 10,000× lands 1 in 5,000 buys.
Does Reef Rumble have a bonus buy, and what does it cost?
Yes, 1 buy mode. Bonus: 200× the base bet, 96.30% RTP, an expected cost of 7.40× the base bet per buy.
Is Reef Rumble high or low volatility?
Low. Its base-mode standard deviation is 12.2× 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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