The RTP Ledger snapshot of the Stake Engine catalogue checked 2026-08-19 displays RAT LAB by RAT LAB at 91.93% base RTP, rounded to two decimal places for presentation and equivalent to a 8.07% displayed theoretical house edge. RTP Ledger lists 3 published modes separately; the figures do not predict one session or establish a live casino configuration.
At 91.93%, the theoretical long-run cost is $8.07 per $100 wagered. The base RTP is higher than 0.8% of the 2,830 other Stake Engine games with a base figure. The base RTP is 4.07 percentage points below the median for the compared Stake Engine games.
At the two-decimal display precision, BONUS WILD has the highest displayed RTP at 92.24%. BONUS BASIC has the lowest displayed RTP at 91.88%. The difference between the displayed extremes is 0.36 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 | 91.93% | 8.07% | 3,000,000 |
| BONUS BASIC | Other feature or mode | 91.88% | 8.12% | 3,000,000 |
| BONUS WILD | Other feature or mode | 92.24% | 7.76% | 5,000,000 |
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 91.93% base RTP for RAT LAB by RAT LAB, rounded to two decimals for presentation. The corresponding displayed theoretical house edge is 8.07%; neither figure predicts one session.
At the two-decimal display precision, BONUS WILD has the highest displayed RTP at 92.24%. BONUS BASIC has the lowest displayed RTP at 91.88%.
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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RAT LAB has fewer than five catalogue records, so RTP Ledger keeps its studio profile inside the complete games list instead of a separate page.
Version 196, first recorded by RTP Ledger on 2026-08-19. No version change has been recorded since tracking began.