The Big Bank slot: RTP and max win
The Big Bank is a high-volatility slot by GG Gaming on Stake Engine, released 7 May 2026. Its base game returns 96.19%, above the median Engine slot (96.02%) and higher than 56% of them. The top payout is 25,000× the bet, bigger than 81% of Engine slots; from a base spin it lands about once every 1,095,796 spins. It has 4 bonus buys priced at 100× to 500× the bet; the best returns 96.01%, so each buy costs 3.99× the bet on average over the long run. It is the No. 1229 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 v21. "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× | 96.19% | 25,000× | 1 in 1,095,796 | 1 in 6.32 | 1 in 12 | 0.04× base | Simulate |
| Ante | Boosted spin | 2.00× | 96.10% | 25,000× | 1 in 1,059,942 | 1 in 2.94 | 1 in 11 | 0.08× base | Simulate |
| Bonus1 | Bonus buy | 100× | 96.01% | 25,000× | 1 in 19,068 | – | 1 in 4.48 | 3.99× base | Simulate |
| Bonus2 | Bonus buy | 200× | 96.01% | 25,000× | 1 in 9,390 | – | 1 in 5.01 | 7.98× base | Simulate |
| Bonus3 | Bonus buy | 300× | 96.01% | 25,000× | 1 in 9,342 | – | 1 in 5.90 | 11.97× base | Simulate |
| Special Spin | Bonus buy | 500× | 96.01% | 25,000× | 1 in 4,997 | – | 1 in 5.50 | 19.95× base | Simulate |
Work out the cost of The Big Bank 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 | |
|---|---|---|
| v21 | 96.190% | Active |
| v20 | 96.190% | |
| v19 | 96.190% |
Frequently asked
What is the RTP of The Big Bank?
Base spins return 96.19% of the amount wagered over the long run, from the published outcome table for version 21. All 4 of its bonus buys return 96.01%.
What is the max win in The Big Bank and how likely is it?
The top payout is 25,000× the base bet. On a base spin it lands 1 in 1,095,796 spins. In the Bonus1 buy (100×) 25,000× lands 1 in 19,068 buys.
Does The Big Bank have a bonus buy, and what does it cost?
Yes, 4 buy modes. Bonus1: 100× the base bet, 96.01% RTP, an expected cost of 3.99× the base bet per buy. Bonus2: 200× the base bet, 96.01% RTP, an expected cost of 7.98× the base bet per buy. Bonus3: 300× the base bet, 96.01% RTP, an expected cost of 11.97× the base bet per buy. Special Spin: 500× the base bet, 96.01% RTP, an expected cost of 19.95× the base bet per buy.
Is The Big Bank high or low volatility?
High. Its base-mode standard deviation is 48.0× 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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