Royal Clusters slot: RTP and max win
Royal Clusters is a high-volatility slot by House Gaming on Stake Engine, released 9 Jul 2026. Its base game returns 90.30%, below the median Engine slot (96.02%). The top payout is 25,000× the bet, bigger than 81% of Engine slots; from a base spin it lands about once every 1,000,000 spins. It has 4 bonus buys priced at 20× to 500× the bet; the best returns 90.30%, so each buy costs 1.94× the bet on average over the long run. It is the No. 6085 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 v2. "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× | 90.30% | 25,000× | 1 in 1,000,000 | 1 in 2.87 | 1 in 9.59 | 0.10× base | Simulate |
| Big Chance | Boosted spin | 5.00× | 90.30% | 25,000× | 1 in 1,000,000 | 1 in 2.88 | 1 in 26 | 0.48× base | Simulate |
| Ultra Chance | Boosted spin | 10× | 90.30% | 25,000× | 1 in 1,000,000 | 1 in 2.73 | 1 in 21 | 0.97× base | Simulate |
| Wild Rush | Bonus buy | 20× | 90.30% | 25,000× | 1 in 1,000,000 | 1 in 1.55 | 1 in 28 | 1.94× base | Simulate |
| Castle Raise | Bonus buy | 40× | 90.30% | 25,000× | 1 in 1,000,000 | 1 in 3.11 | 1 in 14 | 3.88× base | Simulate |
| Battle Spins | Bonus buy | 100× | 90.30% | 25,000× | 1 in 1,000,000 | – | 1 in 5.56 | 9.70× base | Simulate |
| Royal Tales | Bonus buy | 500× | 90.30% | 25,000× | 1 in 1,000,000 | – | 1 in 9.40 | 48.50× base | Simulate |
Work out the cost of Royal Clusters 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 | |
|---|---|---|
| v2 | 90.300% | Active |
Frequently asked
What is the RTP of Royal Clusters?
Base spins return 90.30% of the amount wagered over the long run, from the published outcome table for version 2. All 4 of its bonus buys return 90.30%.
What is the max win in Royal Clusters and how likely is it?
The top payout is 25,000× the base bet. On a base spin it lands 1 in 1,000,000 spins. In the Wild Rush buy (20×) 25,000× lands 1 in 1,000,000 buys.
Does Royal Clusters have a bonus buy, and what does it cost?
Yes, 4 buy modes. Wild Rush: 20× the base bet, 90.30% RTP, an expected cost of 1.94× the base bet per buy. Castle Raise: 40× the base bet, 90.30% RTP, an expected cost of 3.88× the base bet per buy. Battle Spins: 100× the base bet, 90.30% RTP, an expected cost of 9.70× the base bet per buy. Royal Tales: 500× the base bet, 90.30% RTP, an expected cost of 48.50× the base bet per buy.
Is Royal Clusters high or low volatility?
High. Its base-mode standard deviation is 25.6× 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.
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