Crimson Eclipse slot: RTP and max win
Crimson Eclipse is a medium-volatility slot by RTP Labs on Stake Engine, released 23 Jul 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 1,500,001 spins. It has 5 bonus buys priced at 100× to 500× 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. 3801 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 v1. "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 1,500,001 | 1 in 1.95 | 1 in 39 | 0.04× base | Simulate |
| Double Chance | Boosted spin | 3.00× | 96.50% | 15,000× | 1 in 500,000 | 1 in 1.89 | 1 in 20 | 0.11× base | Simulate |
| Feature Spin 1 | Bonus buy | 100× | 96.50% | 15,000× | 1 in 15,000 | – | 1 in 2.30 | 3.50× base | Simulate |
| Free Spin Bonus | Bonus buy | 100× | 96.50% | 15,000× | 1 in 15,000 | – | 1 in 5.14 | 3.50× base | Simulate |
| Feature Spin 2 | Bonus buy | 200× | 96.50% | 15,000× | 1 in 7,500 | – | 1 in 3.99 | 7.00× base | Simulate |
| Premium Bonus | Bonus buy | 300× | 96.50% | 15,000× | 1 in 5,000 | – | 1 in 3.96 | 10.50× base | Simulate |
| Mystery Bonus | Bonus buy | 500× | 96.50% | 15,000× | 1 in 3,000 | – | 1 in 4.54 | 17.50× base | Simulate |
Work out the cost of Crimson Eclipse 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 | |
|---|---|---|
| v1 | 96.500% | Active |
Frequently asked
What is the RTP of Crimson Eclipse?
Base spins return 96.50% of the amount wagered over the long run, from the published outcome table for version 1. All 5 of its bonus buys return 96.50%.
What is the max win in Crimson Eclipse and how likely is it?
The top payout is 15,000× the base bet. On a base spin it lands 1 in 1,500,001 spins. In the Feature Spin 1 buy (100×) 15,000× lands 1 in 15,000 buys.
Does Crimson Eclipse have a bonus buy, and what does it cost?
Yes, 5 buy modes. Feature Spin 1: 100× the base bet, 96.50% RTP, an expected cost of 3.50× the base bet per buy. Free Spin Bonus: 100× the base bet, 96.50% RTP, an expected cost of 3.50× the base bet per buy. Feature Spin 2: 200× the base bet, 96.50% RTP, an expected cost of 7.00× the base bet per buy. Premium Bonus: 300× the base bet, 96.50% RTP, an expected cost of 10.50× the base bet per buy. Mystery Bonus: 500× the base bet, 96.50% RTP, an expected cost of 17.50× the base bet per buy.
Is Crimson Eclipse high or low volatility?
Medium. Its base-mode standard deviation is 21.1× 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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