Moonstone Warden slot: RTP and max win
Moonstone Warden is a high-volatility slot by Nightvault on Stake Engine, released 30 Oct 2026. Its base game returns 96.23%, above the median Engine slot (96.02%) and higher than 60% of them. The top payout is 30,000× the bet, bigger than 83% of Engine slots; from a base spin it lands about once every 205,819 spins. It has 4 bonus buys priced at 50× to 600× the bet; the best returns 96.23%, so each buy costs 1.88× the bet on average over the long run. It is the No. 3202 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× | 96.23% | 30,000× | 1 in 205,819 | 1 in 3.54 | 1 in 17 | 0.04× base | Simulate |
| Moonrise | Boosted spin | 3.00× | 96.23% | 30,000× | 1 in 37,947 | 1 in 3.43 | 1 in 58 | 0.11× base | Simulate |
| Warden Spins | Bonus buy | 50× | 96.23% | 30,000× | 1 in 2,230 | 1 in 1.79 | 1 in 23 | 1.88× base | Simulate |
| Moonfall | Bonus buy | 150× | 96.23% | 30,000× | 1 in 2,074 | every round | 1 in 6.78 | 5.65× base | Simulate |
| Starvault | Bonus buy | 500× | 96.23% | 30,000× | 1 in 361 | every round | 1 in 6.94 | 18.85× base | Simulate |
| Mystery Seal | Bonus buy | 600× | 96.23% | 30,000× | 1 in 225 | 1 in 2.86 | 1 in 9.66 | 22.62× base | Simulate |
Work out the cost of Moonstone Warden 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 | 96.230% | Active |
Frequently asked
What is the RTP of Moonstone Warden?
Base spins return 96.23% of the amount wagered over the long run, from the published outcome table for version 2. All 4 of its bonus buys return 96.23%.
What is the max win in Moonstone Warden and how likely is it?
The top payout is 30,000× the base bet. On a base spin it lands 1 in 205,819 spins. In the Warden Spins buy (50×) 30,000× lands 1 in 2,230 buys.
Does Moonstone Warden have a bonus buy, and what does it cost?
Yes, 4 buy modes. Warden Spins: 50× the base bet, 96.23% RTP, an expected cost of 1.88× the base bet per buy. Moonfall: 150× the base bet, 96.23% RTP, an expected cost of 5.65× the base bet per buy. Starvault: 500× the base bet, 96.23% RTP, an expected cost of 18.85× the base bet per buy. Mystery Seal: 600× the base bet, 96.23% RTP, an expected cost of 22.62× the base bet per buy.
Is Moonstone Warden high or low volatility?
High. Its base-mode standard deviation is 90.2× 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.
Slots with similar math to Moonstone Warden
Matched on volatility, max win, RTP and whether there's a bonus buy. Not on theme.
Haunted HollowReactor Games RTP96.00%Max win25,000×Volatility
Phantom ParadePupool Play RTP96.00%Max win50,000×Volatility
Dead MirageLT STUDIOS RTP96.00%Max win50,000×Volatility
Hocus PopJYPYSGAME RTP96.50%Max win50,000×Volatility
Mambo BonesHEXMIRE STUDIOS RTP96.50%Max win50,000×Volatility
Radiant RichesSpinova RTP95.32%Max win25,000×Volatility