Space Vault slot: RTP and max win
Space Vault is a low-volatility slot by WinCap Gaming on Stake Engine, released 22 Aug 2026. Its base game returns 94.50%, 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 12,000,000 spins. It has 3 bonus buys priced at 100× to 500× the bet; the best returns 94.50%, so each buy costs 5.50× the bet on average over the long run. It is the No. 5071 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 v4. "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× | 94.50% | 25,000× | 1 in 12,000,000 | 1 in 1.86 | 1 in 12 | 0.06× base | Simulate |
| Scatter Boost | Boosted spin | 4.00× | 94.50% | 25,000× | 1 in 12,000,000 | 1 in 2.35 | 1 in 27 | 0.22× base | Simulate |
| Freespin | Bonus buy | 100× | 94.50% | 25,000× | 1 in 12,000,003 | 1 in 1.02 | 1 in 10 | 5.50× base | Simulate |
| Superfreespin | Bonus buy | 300× | 94.50% | 25,000× | 1 in 11,999,997 | 1 in 1.01 | 1 in 7.86 | 16.50× base | Simulate |
| Coinspin | Bonus buy | 500× | 94.50% | 25,000× | 1 in 12,000,017 | – | 1 in 6.67 | 27.50× base | Simulate |
Work out the cost of Space Vault 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 | |
|---|---|---|
| v4 | 94.500% | Active |
Frequently asked
What is the RTP of Space Vault?
Base spins return 94.50% of the amount wagered over the long run, from the published outcome table for version 4. All 3 of its bonus buys return 94.50%.
What is the max win in Space Vault and how likely is it?
The top payout is 25,000× the base bet. On a base spin it lands 1 in 12,000,000 spins. In the Freespin buy (100×) 25,000× lands 1 in 12,000,003 buys.
Does Space Vault have a bonus buy, and what does it cost?
Yes, 3 buy modes. Freespin: 100× the base bet, 94.50% RTP, an expected cost of 5.50× the base bet per buy. Superfreespin: 300× the base bet, 94.50% RTP, an expected cost of 16.50× the base bet per buy. Coinspin: 500× the base bet, 94.50% RTP, an expected cost of 27.50× the base bet per buy.
Is Space Vault high or low volatility?
Low. Its base-mode standard deviation is 10.3× the bet, which puts it in the lowest 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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