Castle Fortune slot: RTP and max win
Castle Fortune is a medium-volatility slot by Lemon Labs on Stake Engine, released 5 Aug 2026. Its base game returns 95.00%, below the median Engine slot (96.02%). The top payout is 10,000× the bet; from a base spin it lands about once every 2,000,003 spins. It has 4 bonus buys priced at 25× to 250× the bet; the best returns 95.00%, so each buy costs 1.25× the bet on average over the long run. It is the No. 5373 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 v6. "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× | 95.00% | 10,000× | 1 in 2,000,003 | 1 in 2.48 | 1 in 29 | 0.05× base | Simulate |
| Double Chance | Boosted spin | 2.00× | 95.00% | 10,000× | 1 in 1,000,000 | 1 in 2.46 | 1 in 22 | 0.10× base | Simulate |
| Super Spin | Bonus buy | 25× | 95.00% | 10,000× | 1 in 40,000 | – | 1 in 13 | 1.25× base | Simulate |
| Bonus | Bonus buy | 100× | 95.00% | 10,000× | 1 in 6,667 | – | 1 in 2.71 | 5.00× base | Simulate |
| Super Bonus | Bonus buy | 200× | 95.00% | 10,000× | 1 in 6,667 | – | 1 in 4.12 | 10.00× base | Simulate |
| Hidden Bonus | Bonus buy | 250× | 94.99% | 10,000× | 1 in 6,668 | – | 1 in 4.82 | 12.53× base | Simulate |
Work out the cost of Castle Fortune 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 | |
|---|---|---|
| v6 | 95.000% | Active |
Frequently asked
What is the RTP of Castle Fortune?
Base spins return 95.00% of the amount wagered over the long run, from the published outcome table for version 6. Its bonus buys return between 94.99% and 95.00%.
What is the max win in Castle Fortune and how likely is it?
The top payout is 10,000× the base bet. On a base spin it lands 1 in 2,000,003 spins. In the Super Spin buy (25×) 10,000× lands 1 in 40,000 buys.
Does Castle Fortune have a bonus buy, and what does it cost?
Yes, 4 buy modes. Super Spin: 25× the base bet, 95.00% RTP, an expected cost of 1.25× the base bet per buy. Bonus: 100× the base bet, 95.00% RTP, an expected cost of 5.00× the base bet per buy. Super Bonus: 200× the base bet, 95.00% RTP, an expected cost of 10.00× the base bet per buy. Hidden Bonus: 250× the base bet, 94.99% RTP, an expected cost of 12.53× the base bet per buy.
Is Castle Fortune high or low volatility?
Medium. Its base-mode standard deviation is 13.6× the bet, which puts it in the middle 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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