Crystal Fever slot: RTP and max win
Crystal Fever is a high-volatility slot by Ovryx Gaming on Stake Engine, released 29 Aug 2026. The top payout is 25,000× the bet; from a base spin it lands about once every 1,199,978 spins. It has 10 bonus buys priced at 100× to 1,000× the bet; the best returns 96.01%, so each buy costs 9.98× the bet on average over the long run. It is the No. 3688 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 v9. "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× | 96.01% | 25,000× | 1 in 1,199,978 | 1 in 6.42 | 1 in 8.44 | 0.04× base | Simulate |
| Enchanted | Boosted spin | 3.00× | 96.01% | 25,000× | 1 in 323,888 | 1 in 4.60 | 1 in 8.41 | 0.12× base | Simulate |
| Enchanted Ungated | Boosted spin | 3.00× | 96.01% | 25,000× | 1 in 67,002 | 1 in 1.14 | 1 in 31 | 0.12× base | Simulate |
| Enchanted5 | Boosted spin | 5.00× | 96.01% | 25,000× | 1 in 244,274 | – | 1 in 16 | 0.20× base | Simulate |
| Enchanted5 Ungated | Boosted spin | 5.00× | 96.01% | 25,000× | 1 in 23,000 | 1 in 1.27 | 1 in 32 | 0.20× base | Simulate |
| Enchanted10 | Boosted spin | 10× | 96.01% | 25,000× | 1 in 113,531 | – | 1 in 13 | 0.40× base | Simulate |
| Enchanted10 Ungated | Boosted spin | 10× | 96.00% | 25,000× | 1 in 8,400 | 1 in 1.21 | 1 in 32 | 0.40× base | Simulate |
| Bonus | Bonus buy | 100× | 96.00% | 25,000× | 1 in 1,232,565 | – | 1 in 54 | 4.00× base | Simulate |
| Bonus Ungated | Bonus buy | 100× | 96.01% | 25,000× | 1 in 840 | 1 in 1.18 | 1 in 27 | 3.99× base | Simulate |
| Super Bonus | Bonus buy | 250× | 95.94% | 25,000× | 1 in 8,507 | – | 1 in 4.51 | 10.14× base | Simulate |
| Super Bonus Ungated | Bonus buy | 250× | 96.01% | 25,000× | 1 in 340 | 1 in 1.16 | 1 in 22 | 9.98× base | Simulate |
| Mystery Bonus | Bonus buy | 300× | 96.01% | 25,000× | 1 in 7,126 | – | 1 in 5.89 | 11.97× base | Simulate |
| Mystery Bonus Ungated | Bonus buy | 300× | 96.01% | 25,000× | 1 in 280 | 1 in 1.11 | 1 in 21 | 11.97× base | Simulate |
| Ultra Bonus | Bonus buy | 500× | 96.01% | 25,000× | 1 in 6,602 | – | 1 in 5.90 | 19.96× base | Simulate |
| Ultra Bonus Ungated | Bonus buy | 500× | 96.01% | 25,000× | 1 in 160 | 1 in 1.04 | 1 in 18 | 19.95× base | Simulate |
| Max Mode | Bonus buy | 1,000× | 96.00% | 25,000× | 1 in 6,302 | – | 1 in 4.08 | 40.01× base | Simulate |
| Max Mode Ungated | Bonus buy | 1,000× | 96.01% | 25,000× | 1 in 35 | 1 in 9.43 | 1 in 15 | 39.90× base | Simulate |
Work out the cost of Crystal Fever 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 | |
|---|---|---|
| v9 | 96.010% | Active |
| v7 | 96.010% |
Frequently asked
What is the RTP of Crystal Fever?
Base spins return 96.01% of the amount wagered over the long run, from the published outcome table for version 9. Its bonus buys return between 95.94% and 96.01%.
What is the max win in Crystal Fever and how likely is it?
The top payout is 25,000× the base bet. On a base spin it lands 1 in 1,199,978 spins. In the Super Bonus Ungated buy (250×) 25,000× lands 1 in 340 buys.
Does Crystal Fever have a bonus buy, and what does it cost?
Yes, 10 buy modes. Bonus: 100× the base bet, 96.00% RTP, an expected cost of 4.00× the base bet per buy. Bonus Ungated: 100× the base bet, 96.01% RTP, an expected cost of 3.99× the base bet per buy. Super Bonus: 250× the base bet, 95.94% RTP, an expected cost of 10.14× the base bet per buy. Super Bonus Ungated: 250× the base bet, 96.01% RTP, an expected cost of 9.98× the base bet per buy. Mystery Bonus: 300× the base bet, 96.01% RTP, an expected cost of 11.97× the base bet per buy. Mystery Bonus Ungated: 300× the base bet, 96.01% RTP, an expected cost of 11.97× the base bet per buy. Ultra Bonus: 500× the base bet, 96.01% RTP, an expected cost of 19.96× the base bet per buy. Ultra Bonus Ungated: 500× the base bet, 96.01% RTP, an expected cost of 19.95× the base bet per buy. Max Mode: 1,000× the base bet, 96.00% RTP, an expected cost of 40.01× the base bet per buy. Max Mode Ungated: 1,000× the base bet, 96.01% RTP, an expected cost of 39.90× the base bet per buy.
Is Crystal Fever high or low volatility?
High. Its base-mode standard deviation is 36.6× 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.