Black Deck slot: RTP and max win
Black Deck is a high-volatility slot by Infinity Labs on Stake Engine, released 30 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 40,000× the bet, bigger than 84% of Engine slots; from a base spin it lands about once every 8,000,000 spins. 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. 213 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× | 96.70% | 40,000× | 1 in 8,000,000 | 1 in 3.85 | 1 in 9.89 | 0.03× base | Simulate |
| Ante 1 | Boosted spin | 3.00× | 96.70% | 40,000× | 1 in 600,000 | 1 in 11 | 1 in 34 | 0.10× base | Simulate |
| Ante 2 | Boosted spin | 10× | 96.70% | 40,000× | 1 in 200,000 | 1 in 19 | 1 in 45 | 0.33× base | Simulate |
| Play Bonus | Bonus buy | 100× | 96.70% | 40,000× | 1 in 30,000 | – | 1 in 4.91 | 3.30× base | Simulate |
| Ante Wild Deck | Bonus buy | 250× | 96.70% | 40,000× | 1 in 12,000 | – | 1 in 4.00 | 8.25× base | Simulate |
| Play Super Bonus | Bonus buy | 300× | 96.70% | 40,000× | 1 in 5,000 | – | 1 in 4.80 | 9.90× base | Simulate |
| Ante Deck Mystery | Bonus buy | 500× | 96.70% | 40,000× | 1 in 2,000 | 1 in 3.33 | 1 in 7.60 | 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 | |
|---|---|---|
| v4 | 96.700% | Active |
Frequently asked
What is the RTP of Black Deck?
Base spins return 96.70% of the amount wagered over the long run, from the published outcome table for version 4. All 4 of its bonus buys return 96.70%.
What is the max win in Black Deck and how likely is it?
The top payout is 40,000× the base bet. On a base spin it lands 1 in 8,000,000 spins. In the Play Bonus buy (100×) 40,000× lands 1 in 30,000 buys.
Does Black Deck 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. Ante Wild Deck: 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 Deck Mystery: 500× the base bet, 96.70% RTP, an expected cost of 16.50× the base bet per buy.
Is Black Deck high or low volatility?
High. Its base-mode standard deviation is 29.1× 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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