Book of Brew slot: RTP and max win
Book of Brew is a medium-volatility slot by Grind Gaming on Stake Engine, released 13 Aug 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 14,705,920 spins. It has 4 bonus buys priced at 200× to 700× the bet; the best returns 96.00%, so each buy costs 8.00× the bet on average over the long run. It is the No. 3248 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× | 96.00% | 25,000× | 1 in 14,705,920 | 1 in 3.62 | 1 in 76 | 0.04× base | Simulate |
| Extra Chance | Boosted spin | 2.50× | 96.00% | 25,000× | 1 in 12,500,068 | 1 in 3.22 | 1 in 43 | 0.10× base | Simulate |
| Special Spin | Bonus buy | 200× | 96.00% | 25,000× | 1 in 1,250,001 | 1 in 2.00 | 1 in 3.13 | 8.00× base | Simulate |
| Bonus | Bonus buy | 250× | 96.00% | 25,000× | 1 in 100,000 | 1 in 1.05 | 1 in 6.91 | 10.00× base | Simulate |
| Super Bonus | Bonus buy | 500× | 96.00% | 25,000× | 1 in 500,000 | 1 in 1.05 | 1 in 3.99 | 20.00× base | Simulate |
| Max Spin | Bonus buy | 700× | 96.00% | 25,000× | 1 in 3,571,432 | 1 in 3.33 | 1 in 3.55 | 28.00× base | Simulate |
Work out the cost of Book of Brew 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 | 96.000% | Active |
Frequently asked
What is the RTP of Book of Brew?
Base spins return 96.00% of the amount wagered over the long run, from the published outcome table for version 21. All 4 of its bonus buys return 96.00%.
What is the max win in Book of Brew and how likely is it?
The top payout is 25,000× the base bet. On a base spin it lands 1 in 14,705,920 spins. In the Special Spin buy (200×) 25,000× lands 1 in 1,250,001 buys.
Does Book of Brew have a bonus buy, and what does it cost?
Yes, 4 buy modes. Special Spin: 200× the base bet, 96.00% RTP, an expected cost of 8.00× the base bet per buy. Bonus: 250× the base bet, 96.00% RTP, an expected cost of 10.00× the base bet per buy. Super Bonus: 500× the base bet, 96.00% RTP, an expected cost of 20.00× the base bet per buy. Max Spin: 700× the base bet, 96.00% RTP, an expected cost of 28.00× the base bet per buy.
Is Book of Brew high or low volatility?
Medium. Its base-mode standard deviation is 14.0× 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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