The RTP Ledger snapshot of the Stake Engine catalogue checked 2026-08-19 displays Book of Halloween 4096 by Impera Gaming at 96.4% base RTP, rounded to two decimal places for presentation and equivalent to a 3.6% displayed theoretical house edge. RTP Ledger lists 6 published modes separately; the figures do not predict one session or establish a live casino configuration.
At 96.4%, the theoretical long-run cost is $3.60 per $100 wagered. The base RTP is higher than 72.4% of the 2,830 other Stake Engine games with a base figure. The base RTP is 0.40 percentage points above the median for the compared Stake Engine games.
At the two-decimal display precision, mystery has the highest displayed RTP at 96.47%. ante has the lowest displayed RTP at 96.29%. The difference between the displayed extremes is 0.18 percentage points.
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 | 96.4% | 3.6% | 50,000 |
| scatter | Other feature or mode | 96.46% | 3.54% | 50,000 |
| bonus | Other feature or mode | 96.34% | 3.66% | 50,000 |
| mystery | Other feature or mode | 96.47% | 3.53% | 50,000 |
| ante | Other feature or mode | 96.29% | 3.71% | 50,000 |
| super | Other feature or mode | 96.32% | 3.68% | 50,000 |
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 96.4% base RTP for Book of Halloween 4096 by Impera Gaming, rounded to two decimals for presentation. The corresponding displayed theoretical house edge is 3.6%; neither figure predicts one session.
At the two-decimal display precision, mystery has the highest displayed RTP at 96.47%. ante has the lowest displayed RTP at 96.29%.
RTP Ledger uses the mode RTP values and reported event counts in the Stake Engine catalogue snapshot dated 2026-08-19. RTP values are rounded to two decimal places for presentation while the source precision remains in the data record. The source field is named “events”; RTP Ledger does not relabel it as observed rounds or unique outcomes.
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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Impera Gaming has fewer than five catalogue records, so RTP Ledger keeps its studio profile inside the complete games list instead of a separate page.
Version 55, first recorded by RTP Ledger on 2026-08-19. No version change has been recorded since tracking began.