Castle of Ymir slot: RTP and max win
Castle of Ymir is a medium-volatility slot by Valkyrie on Stake Engine, released 12 Apr 2026. Its base game returns 98.00%, above the median Engine slot (96.02%) and higher than 100% of them. The top payout is 10,000× the bet; from a base spin it lands about once every 3,794,043 spins. It has 1 bonus buy priced at 25× the bet; the best returns 98.00%, so each buy costs 0.50× the bet on average over the long run. It is the No. 352 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 v24. "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× | 98.00% | 10,000× | 1 in 3,794,043 | 1 in 29 | 1 in 33 | 0.02× base | Simulate |
| Ante | Boosted spin | 3.00× | 98.00% | 10,000× | 1 in 605,134 | 1 in 22 | 1 in 27 | 0.06× base | Simulate |
| Ante Silver | Boosted spin | 10× | 98.00% | 10,000× | 1 in 343,302 | 1 in 13 | 1 in 23 | 0.20× base | Simulate |
| Ante Gold | Bonus buy | 25× | 98.00% | 10,000× | 1 in 6,799 | 1 in 9.03 | 1 in 23 | 0.50× base | Simulate |
Work out the cost of Castle of Ymir 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 | |
|---|---|---|
| v24 | 98.000% | Active |
Frequently asked
What is the RTP of Castle of Ymir?
Base spins return 98.00% of the amount wagered over the long run, from the published outcome table for version 24. Its bonus buy returns 98.00%.
What is the max win in Castle of Ymir and how likely is it?
The top payout is 10,000× the base bet. On a base spin it lands 1 in 3,794,043 spins. In the Ante Gold buy (25×) 10,000× lands 1 in 6,799 buys.
Does Castle of Ymir have a bonus buy, and what does it cost?
Yes, 1 buy mode. Ante Gold: 25× the base bet, 98.00% RTP, an expected cost of 0.50× the base bet per buy.
Is Castle of Ymir high or low volatility?
Medium. Its base-mode standard deviation is 19.3× 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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