Kings Chamber slot: RTP and max win
Kings Chamber is a high-volatility slot by NextPlay on Stake Engine, released 25 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 1,000,000 spins. It has 4 bonus buys priced at 50× to 250× the bet; the best returns 96.50%, so each buy costs 1.75× the bet on average over the long run. It is the No. 3414 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 v104. "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 Game | Base spin | 1.00× | 96.50% | 15,000× | 1 in 1,000,000 | 1 in 1.33 | 1 in 4.19 | 0.04× base | Simulate |
| Lucky Crown | Boosted spin | 2.00× | 96.50% | 15,000× | 1 in 333,333 | 1 in 1.30 | 1 in 82 | 0.07× base | Simulate |
| Kings Reward | Bonus buy | 50× | 96.50% | 15,000× | 1 in 11,111 | 1 in 1.54 | 1 in 7.02 | 1.75× base | Simulate |
| Bonus Game | Bonus buy | 100× | 96.50% | 15,000× | 1 in 2,273 | every round | 1 in 6.66 | 3.50× base | Simulate |
| Mystery Bonus Game | Bonus buy | 250× | 96.50% | 15,000× | 1 in 11,111 | every round | 1 in 4.53 | 8.75× base | Simulate |
| Super Bonus Game | Bonus buy | 250× | 96.50% | 15,000× | 1 in 11,111 | 1 in 1.01 | 1 in 3.05 | 8.75× base | Simulate |
Work out the cost of Kings Chamber 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 | |
|---|---|---|
| v104 | 96.500% | Active |
| v102 | 96.500% |
Frequently asked
What is the RTP of Kings Chamber?
Base spins return 96.50% of the amount wagered over the long run, from the published outcome table for version 104. All 4 of its bonus buys return 96.50%.
What is the max win in Kings Chamber and how likely is it?
The top payout is 15,000× the base bet. On a base spin it lands 1 in 1,000,000 spins. In the Kings Reward buy (50×) 15,000× lands 1 in 11,111 buys.
Does Kings Chamber have a bonus buy, and what does it cost?
Yes, 4 buy modes. Kings Reward: 50× the base bet, 96.50% RTP, an expected cost of 1.75× the base bet per buy. Bonus Game: 100× the base bet, 96.50% RTP, an expected cost of 3.50× the base bet per buy. Mystery Bonus Game: 250× the base bet, 96.50% RTP, an expected cost of 8.75× the base bet per buy. Super Bonus Game: 250× the base bet, 96.50% RTP, an expected cost of 8.75× the base bet per buy.
Is Kings Chamber high or low volatility?
High. Its base-mode standard deviation is 28.4× 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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