Moon KOI slot: RTP and max win
Moon KOI is a high-volatility slot by Lotors on Stake Engine, released 15 Oct 2026. Its base game returns 96.30%, above the median Engine slot (96.02%) and higher than 61% of them. The top payout is 25,000× the bet, bigger than 81% of Engine slots. It has 4 bonus buys priced at 100× to 1,000× the bet; the best returns 96.30%, so each buy costs 3.70× the bet on average over the long run. It is the No. 1377 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 v3. "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× | 96.30% | 16,488× | 1 in 1,582,528 | 1 in 2.51 | 1 in 31 | 0.04× base | Simulate |
| Moonlight | Boosted spin | 1.25× | 96.30% | 12,224× | 1 in 2,701,524 | 1 in 2.44 | 1 in 37 | 0.05× base | Simulate |
| Bonus Pond | Bonus buy | 100× | 96.30% | 20,269× | 1 in 38,140 | every round | 1 in 20 | 3.70× base | Simulate |
| Bonus Spawning | Bonus buy | 350× | 96.30% | 25,000× | 1 in 29,758 | – | 1 in 11 | 12.95× base | Simulate |
| Bonus Dragon | Bonus buy | 800× | 96.30% | 25,000× | 1 in 30,928 | – | 1 in 4.37 | 29.60× base | Simulate |
| Bonus School | Bonus buy | 1,000× | 96.30% | 11,712× | 1 in 2,203,973 | 1 in 1.02 | 1 in 3.45 | 37.00× base | Simulate |
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 | |
|---|---|---|
| v3 | 96.300% | Active |
Frequently asked
What is the RTP of Moon KOI?
Base spins return 96.30% of the amount wagered over the long run, from the published outcome table for version 3. All 4 of its bonus buys return 96.30%.
What is the max win in Moon KOI and how likely is it?
The top payout is 25,000× the base bet. On a base spin the top payout of 16,488× lands 1 in 1,582,528 spins. In the Bonus Pond buy (100×) 20,269× lands 1 in 38,140 buys.
Does Moon KOI have a bonus buy, and what does it cost?
Yes, 4 buy modes. Bonus Pond: 100× the base bet, 96.30% RTP, an expected cost of 3.70× the base bet per buy. Bonus Spawning: 350× the base bet, 96.30% RTP, an expected cost of 12.95× the base bet per buy. Bonus Dragon: 800× the base bet, 96.30% RTP, an expected cost of 29.60× the base bet per buy. Bonus School: 1,000× the base bet, 96.30% RTP, an expected cost of 37.00× the base bet per buy.
Is Moon KOI high or low volatility?
High. Its base-mode standard deviation is 32.5× 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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