Bergbau slot: RTP and max win
Bergbau is a high-volatility slot by Kanji Studios on Stake Engine, released 27 Oct 2026. Its base game returns 96.70%, above the median Engine slot (96.02%) and higher than 86% 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 500× the bet; the best returns 96.70%, so each buy costs 3.30× the bet on average over the long run. It is the No. 3658 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 v1. "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× | 96.70% | 21,508× | 1 in 587,245 | 1 in 6.22 | 1 in 30 | 0.03× base | Simulate |
| Ante Play 1 | Boosted spin | 3.00× | 96.70% | 6,639× | 1 in 95,069 | 1 in 5.72 | 1 in 31 | 0.10× base | Simulate |
| Ante Play 2 | Boosted spin | 10× | 96.70% | 25,000× | 1 in 36,510 | 1 in 5.56 | 1 in 28 | 0.33× base | Simulate |
| Play Bonus | Bonus buy | 100× | 96.70% | 9,250× | 1 in 99,835 | 1 in 1.02 | 1 in 5.96 | 3.30× base | Simulate |
| Chaos Ante | Bonus buy | 250× | 96.70% | 25,000× | 1 in 14,572 | – | 1 in 3.59 | 8.25× base | Simulate |
| Play Super Bonus | Bonus buy | 300× | 96.70% | 25,000× | 1 in 1,219 | every round | 1 in 5.71 | 9.90× base | Simulate |
| Ante Mystery | Bonus buy | 500× | 96.70% | 25,000× | 1 in 402 | 1 in 2.00 | 1 in 8.16 | 16.50× 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 | |
|---|---|---|
| v1 | 96.700% | Active |
Frequently asked
What is the RTP of Bergbau?
Base spins return 96.70% of the amount wagered over the long run, from the published outcome table for version 1. All 4 of its bonus buys return 96.70%.
What is the max win in Bergbau and how likely is it?
The top payout is 25,000× the base bet. On a base spin the top payout of 21,508× lands 1 in 587,245 spins. In the Play Bonus buy (100×) 9,250× lands 1 in 99,835 buys.
Does Bergbau have a bonus buy, and what does it cost?
Yes, 4 buy modes. Play Bonus: 100× the base bet, 96.70% RTP, an expected cost of 3.30× the base bet per buy. Chaos Ante: 250× the base bet, 96.70% RTP, an expected cost of 8.25× the base bet per buy. Play Super Bonus: 300× the base bet, 96.70% RTP, an expected cost of 9.90× the base bet per buy. Ante Mystery: 500× the base bet, 96.70% RTP, an expected cost of 16.50× the base bet per buy.
Is Bergbau high or low volatility?
High. Its base-mode standard deviation is 39.4× 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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