The RTP Ledger snapshot of the Stake Engine catalogue checked 2026-08-19 displays Extreme Blackjack by Bolly Games at 97.47% base RTP, rounded to two decimal places for presentation and equivalent to a 2.53% displayed theoretical house edge. RTP Ledger lists 5 published modes separately; the figures do not predict one session or establish a live casino configuration.
At 97.47%, the theoretical long-run cost is $2.53 per $100 wagered. The base RTP is higher than 98.4% of the 2,830 other Stake Engine games with a base figure. The base RTP is 1.47 percentage points above the median for the compared Stake Engine games.
At the two-decimal display precision, base has the highest displayed RTP at 97.47%. classic 2v1 has the lowest displayed RTP at 97.03%. The difference between the displayed extremes is 0.44 percentage points.
The highest displayed RTP among modes with “buy” in the published name is 97.36%. The difference from the displayed base RTP is -0.11 percentage points. RTP describes theoretical return over a very large number of bets. RTP does not make a bonus buy safe or predict a short session.
The expected-cost figures apply over a very large number of bets. The figures do not predict what one player will win or lose in a session.
| Mode | Type | Published RTP | House edge | Reported events |
|---|---|---|---|---|
| base | Base game | 97.47% | 2.53% | 100,000 |
| bonus buy | Mode name includes “buy” | 97.36% | 2.64% | 100,000 |
| bigger wins | Other feature or mode | 97.27% | 2.73% | 100,000 |
| drake vs eddie | Other feature or mode | 97.29% | 2.71% | 100,000 |
| classic 2v1 | Other feature or mode | 97.03% | 2.97% | 100,000 |
RTP Ledger checked Stake Engine (fair.stake-engine.com) on 2026-08-19. RTP Ledger displays each published mode RTP rounded to two decimal places and calculates house edge as 100 − displayed RTP. “Reported events” preserves the source field name; it is not labelled as observed rounds or unique outcomes. RTP Ledger does not independently recalculate the catalogue RTP from weights and payouts.
RTP Ledger checked the Stake Engine catalogue on 2026-08-19. It displays a 97.47% base RTP for Extreme Blackjack by Bolly Games, rounded to two decimals for presentation. The corresponding displayed theoretical house edge is 2.53%; neither figure predicts one session.
At the two-decimal display precision, base has the highest displayed RTP at 97.47%. classic 2v1 has the lowest displayed RTP at 97.03%.
The highest displayed RTP among modes with “buy” in the published name is 97.36%. The difference from the 97.47% displayed base RTP is -0.11 percentage points. The comparison uses catalogue data and does not predict the result of one session.
Stake Engine published the catalogue used for the game record. Compare the in-game mode with the published mode table before you play. RTP Ledger can earn a commission if you open Stake through the link. The commission does not change the RTP figures, the publication decision, or the order of records.
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Bolly Games has 22 games in the catalogue with a median base RTP of 96.07%. Extreme Blackjack ranks #1 of 17 rated titles from this studio.
Version 38, first recorded by RTP Ledger on 2026-08-19. No version change has been recorded since tracking began.