Endless Vault slot: RTP and max win
Endless Vault is a medium-volatility slot by EpicSlots on Stake Engine, released 10 Jul 2026. Its base game returns 96.00%, 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 15,055,958 spins. It has 6 bonus buys priced at 100× to 400× the bet; the best returns 96.00%, so each buy costs 4.00× the bet on average over the long run. It is the No. 5881 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 v32. "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 Easy | Base spin | 1.00× | 96.00% | 25,000× | 1 in 15,055,958 | 1 in 2.54 | 1 in 5.11 | 0.04× base | Simulate |
| Base Normal | Boosted spin | 2.00× | 96.00% | 25,000× | 1 in 9,957,684 | 1 in 2.74 | 1 in 4.91 | 0.08× base | Simulate |
| Base Hard | Boosted spin | 4.00× | 96.00% | 25,000× | 1 in 4,990,465 | 1 in 3.36 | 1 in 5.73 | 0.16× base | Simulate |
| Bonus Easy | Bonus buy | 100× | 96.00% | 25,000× | 1 in 199,996 | – | 1 in 4.58 | 4.00× base | Simulate |
| Mines | Bonus buy | 100× | 96.00% | 25,000× | 1 in 150,001 | – | 1 in 4.36 | 4.00× base | Simulate |
| Vault | Bonus buy | 100× | 96.00% | 25,000× | 1 in 149,994 | – | 1 in 7.51 | 4.00× base | Simulate |
| Wheel | Bonus buy | 100× | 96.00% | 25,000× | 1 in 149,999 | – | 1 in 5.85 | 4.00× base | Simulate |
| Bonus Normal | Bonus buy | 200× | 96.00% | 25,000× | 1 in 119,991 | – | 1 in 4.18 | 8.00× base | Simulate |
| Bonus Hard | Bonus buy | 400× | 96.00% | 25,000× | 1 in 59,968 | – | 1 in 4.42 | 16.00× base | Simulate |
Work out the cost of Endless 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 | |
|---|---|---|
| v32 | 96.001% | Active |
Frequently asked
What is the RTP of Endless Vault?
Base spins return 96.00% of the amount wagered over the long run, from the published outcome table for version 32. All 6 of its bonus buys return 96.00%.
What is the max win in Endless Vault and how likely is it?
The top payout is 25,000× the base bet. On a base spin it lands 1 in 15,055,958 spins. In the Mines buy (100×) 25,000× lands 1 in 150,001 buys.
Does Endless Vault have a bonus buy, and what does it cost?
Yes, 6 buy modes. Bonus Easy: 100× the base bet, 96.00% RTP, an expected cost of 4.00× the base bet per buy. Mines: 100× the base bet, 96.00% RTP, an expected cost of 4.00× the base bet per buy. Vault: 100× the base bet, 96.00% RTP, an expected cost of 4.00× the base bet per buy. Wheel: 100× the base bet, 96.00% RTP, an expected cost of 4.00× the base bet per buy. Bonus Normal: 200× the base bet, 96.00% RTP, an expected cost of 8.00× the base bet per buy. Bonus Hard: 400× the base bet, 96.00% RTP, an expected cost of 16.00× the base bet per buy.
Is Endless Vault high or low volatility?
Medium. Its base-mode standard deviation is 16.1× the bet, which puts it in the middle 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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