Sundae Rush slot: RTP and max win
Sundae Rush is a high-volatility slot by fullsend on Stake Engine, released 19 Aug 2026. Its base game returns 96.50%, above the median Engine slot (96.02%) and higher than 66% of them. The top payout is 15,000× the bet, bigger than 50% of Engine slots; from a base spin it lands about once every 17,999,524 spins. It has 5 bonus buys priced at 100× to 200× the bet; the best returns 96.50%, so each buy costs 3.50× the bet on average over the long run. It is the No. 6708 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× | 96.50% | 15,000× | 1 in 17,999,524 | 1 in 2.39 | 1 in 17 | 0.04× base | Simulate |
| Ante | Boosted spin | 1.50× | 96.50% | 15,000× | 1 in 17,999,835 | 1 in 2.36 | 1 in 17 | 0.05× base | Simulate |
| Super Ante | Boosted spin | 3.00× | 96.50% | 15,000× | 1 in 18,000,494 | 1 in 2.45 | 1 in 20 | 0.11× base | Simulate |
| Bonus | Bonus buy | 100× | 96.50% | 15,000× | 1 in 17,999,957 | – | 1 in 3.67 | 3.50× base | Simulate |
| Bonus Random | Bonus buy | 128× | 96.50% | 15,000× | 1 in 17,999,981 | – | 1 in 3.48 | 4.48× base | Simulate |
| Bonus Royal | Bonus buy | 150× | 96.50% | 15,000× | 1 in 18,000,196 | – | 1 in 3.65 | 5.25× base | Simulate |
| Bonus Super | Bonus buy | 200× | 96.50% | 15,000× | 1 in 18,000,342 | – | 1 in 3.63 | 7.00× base | Simulate |
| Max Win Ante | Bonus buy | 200× | 96.50% | 15,000× | 1 in 17,996,962 | 1 in 1.17 | 1 in 3.24 | 7.00× base | Simulate |
Work out the cost of Sundae Rush 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 | |
|---|---|---|
| v3 | 96.500% | Active |
Frequently asked
What is the RTP of Sundae Rush?
Base spins return 96.50% of the amount wagered over the long run, from the published outcome table for version 3. All 5 of its bonus buys return 96.50%.
What is the max win in Sundae Rush and how likely is it?
The top payout is 15,000× the base bet. On a base spin it lands 1 in 17,999,524 spins. In the Bonus buy (100×) 15,000× lands 1 in 17,999,957 buys.
Does Sundae Rush have a bonus buy, and what does it cost?
Yes, 5 buy modes. Bonus: 100× the base bet, 96.50% RTP, an expected cost of 3.50× the base bet per buy. Bonus Random: 128× the base bet, 96.50% RTP, an expected cost of 4.48× the base bet per buy. Bonus Royal: 150× the base bet, 96.50% RTP, an expected cost of 5.25× the base bet per buy. Bonus Super: 200× the base bet, 96.50% RTP, an expected cost of 7.00× the base bet per buy. Max Win Ante: 200× the base bet, 96.50% RTP, an expected cost of 7.00× the base bet per buy.
Is Sundae Rush high or low volatility?
High. Its base-mode standard deviation is 28.1× 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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