Big Fin Bay
Thunderkick delivers an aquatic adventure where participants cast their lines for a legendary golden marlin. The setup provides a starting point of 5,040 ways to win, which can increase to 117,649 paths during the main bonus sequence. Throughout the session, participants might trigger expanding substitutes or a mystery wild mechanic to improve their payouts.
RTP published by the studio / Big Fin Bay
96.14%
Scale starts at 95% · other versions not published
Figures: Thunderkick game page, checked October 6, 2026; each value is linked to its page in the game facts table. Artwork © Thunderkick; image file from the Slots-Info slot database, not supplied by the studio.
15,040×
Max win, × stake
1
RTP version published · others not published
Game facts
| Metric | Value |
|---|---|
| Studio | Thunderkick1 |
| RTP versions | 96.14%1 |
| Other RTP versions | Not published by the studio |
| Volatility | High1 |
| Max win | 15,040× stake1 |
| Bet range | Not published |
| Layout | 6 reels · 5040 (117649 in the Bonus game) pay ways1 |
| Features | Expanding Wilds, Mystery Wild1 |
| Bonus buy | Not published |
| Release date | Not published by the studio |
Numbers link each value to the page it comes from. “Not published” means the studio does not state it; we add it when it does and never estimate a spec. Figures from casino sites are not used.
RTP versions
Thunderkick publishes one RTP setting for Big Fin Bay: 96.14%. Other RTP versions are not published by the studio. Check the game’s help or paytable screen at your casino to see which version it runs.
| RTP version | House edge | Return per $100, long run | vs highest |
|---|---|---|---|
| 96.14% (highest) | 3.86% | $96.14 | — |
House edge = 100% minus RTP. RTP is a long-run average across all players, not a prediction for a session.
Features
- Expanding Wilds
- Mystery Wild
High volatility Volatility is set by the studio and is the same at every casino — unlike RTP.
Where it’s available
Not confirmed. Availability in regulated North American markets is not confirmed yet.
Regulated markets only; availability varies by casino.
