Big Fin Bay by Thunderkick: headline RTP 96.14%, Med-High volatility, max win x1 500 400.
An RTP of 96.14% means a house edge of 3.86% — the expected cost is 3.86 units per 100 staked over the long run, whatever a single session does.
Big Fin Bay is a med-high volatility game: the return arrives in rare, large payouts, so long dry spells are normal rather than a malfunction. Size stakes for the drought, not the average.
The advertised ceiling is x1 500 400. Max win figures describe the tail of the distribution, not a realistic target: on most games with a ceiling this high the probability per spin is below one in a million.
Against our catalogue the number is above the median of 96.13%, higher than 50% of the games whose RTP we verified. That comparison matters more than the raw figure, because "96%" only sounds generous next to nothing.
Features: In-game Freespins.
Released 2021-03-31. Release date matters for RTP: newer titles are more likely to ship with several configurable builds, which is what lets two casinos price the same game differently.
Stakes run from 0.1 to 100 per spin on a 6 layout with fixed betways.
Big Fin Bay is one of 106 Thunderkick titles in our catalogue, a studio averaging 95.82% RTP across the games we could verify.
See the full Thunderkick game list and RTP breakdown.
This title is tagged Fish, Sea. A theme is art direction, not maths — two games sharing every symbol can be priced differently.
Big Fin Bay has a published RTP of 96.14%, a house edge of 3.86%. We have not yet found a casino serving it at a different RTP build.
Yes. Big Fin Bay has a free demo with the same mathematics as the real-money version — the only thing that changes is that the balance is not yours. A demo cannot tell you the RTP build a particular casino serves.
Big Fin Bay is a Thunderkick game, so the outcome is produced by the studio's certified RNG rather than by the casino, and it is not provably fair in the cryptographic sense — you cannot recompute a spin from a seed. What the casino does control is which RTP build it serves. That is the real variable, and it is measurable.