Quick answer
Big Fin Bay is a Thunderkick slot (2021) with 96.14% RTP, high volatility and a 15,040x max win. It uses 117,649 ways with expanding wilds, mystery symbols and free spins. An official free demo is available. RTP can vary by casino.
Key specs
- RTP
- 96.14%
- Volatility
- High
- Max win
- 15,040x
- Grid
- 6 reels
- Pays
- 117,649 ways
- Released
- 17 March 2021
- Jackpot
- None
Not published by the provider: bet range
Casinos with Thunderkick games
- Opalis125% up to $750 + 125 Free Spins35x bonusCarries ThunderkickPlay at Opalis (opens in new tab)
18+. New customers. Min dep $20. 35x bonus wagering. Max bet $5. 21 days. 125 spins on Sweet Bonanza at $0.20. Full T&Cs apply.
Key terms
18+. New customers only. Min deposit $20. 35x bonus wagering requirement. Max bet $5 while wagering. Free spins on Sweet Bonanza at $0.20 per spin. Offer valid 21 days. Full T&Cs apply. Please gamble responsibly.
Check Big Fin Bay is in the lobby in your country.
Themes:
Free demo Members
Try Big Fin Bay with play money before deciding whether to play for real. Official Thunderkick demos are free for GambGenius members.
How to play Big Fin Bay (members only)
Instead of fixed lines, matching symbols on adjacent reels pay in any position, starting from the leftmost reel. The more matching symbols there are on each reel, the more ways the combination pays.
Big Fin Bay is played on a 6 reels grid with 117,649 ways.
- Set your stake. Choose your total bet per spin. Wins are paid as multiples of this stake.
- Check the paytable. Open the game's info screen to see what each symbol pays and the exact rules for this version.
- Spin. Each spin's result is decided by a certified random number generator, independent of previous spins.
- Trigger the bonus. Land the required scatter symbols to start the free spins feature.
The full Big Fin Bay guide: how winnings work, 3 features and 3 strategy tips
- Your stake plan: a $50 budget → about $0.17 a spin (high volatility)
- What 96.14% RTP costs per $100 wagered: $3.86 on average
- 3 features explained: expanding wilds, mystery symbols, free spins
- Stake plans for $20 to $250 budgets
- 4 slots with the same style and a higher RTP (up to 98.12%)
- Strategy tips and a session planner for Big Fin Bay
Free · no card · 18+ only
Never sold · export or delete any time · What do members get?
How winnings work (members only)
What 96.14% RTP costs per $100 wagered, the 15,040x max win at a $1 stake
The top prize is capped at 15,040x your stake. On a $1 spin that is $15,040; on $0.20 it is $3,008. When the cap is reached the round usually ends immediately.
What 96.14% RTP means
Expected return = stake × 96.14%
Over $100 of total bets, the long-run average loss is $3.86
RTP is a long-run average across millions of spins. Any single session can finish far above or below it, especially on a high volatility game.
Features explained (members only)
3 features explained: expanding wilds, mystery symbols, free spins
Expanding wilds
When an expanding wild lands, it grows to cover its whole reel, turning one symbol into a full column of wilds.
Mystery symbols
Special symbols that all reveal the same randomly chosen regular symbol, which can complete several wins at once.
Free spins
A bonus round of spins played at no cost to your balance, usually triggered by landing three or more scatter symbols. Wins during the round are added to your balance, and many games let you retrigger extra spins.
Strategy tips (members only)
- Size your stake to the volatility. High volatility concentrates the return in rare, large wins. Long losing runs are normal. Keep stakes small (around 1% of your session budget or less) so you can ride out the swings. A simple rule: bring at least 300 spins' worth of budget, so a $50 budget suggests a stake of about $0.17.
2 more tips and a session planner
- Bonus wagering: at 96.14% RTP, clearing $1,000 of wagering costs about $38.60 on average. Check the bonus terms, as some casinos exclude specific games. Run your numbers in the wagering calculator.
- Set limits before you spin. Decide your loss limit and session time in advance and stop when you reach either. No pattern or betting system changes the outcome of a spin.
More on this in slot RTP and volatility explained and bankroll management.
Does it fit your budget? (members only)
Stake plans for $20 to $250 budgets
For high volatility we suggest a budget of at least 300 spins. This is what that means for Big Fin Bay.
| Budget | Stake a spin | Bet range | Average cost of 300 spins |
|---|---|---|---|
| $20 | $0.07 | Bet range not published | $0.77 |
| $50 | $0.17 | Bet range not published | $1.93 |
| $100 | $0.33 | Bet range not published | $3.86 |
| $250 | $0.83 | Bet range not published | $9.65 |
Averages only: a short session can end far above or below them. Set a loss limit before you play.
Same style, better RTP (members only)
4 slots with the same style and a higher RTP (up to 98.12%)
Slots with the same mechanic (ways to win) and volatility (high) as Big Fin Bay, with a higher published RTP. Casinos can still run lower versions of any of them.
Marching Legions98.12% RTP · +1.98 pts
Bomb Runner98% RTP · +1.86 pts
Carnival Cove98% RTP · +1.86 pts
Fire Rooster98% RTP · +1.86 ptsQuestions
Frequently asked questions
Who makes Big Fin Bay?
Big Fin Bay is developed by Thunderkick and was released in 2021.
What is the RTP of Big Fin Bay?
The default RTP of Big Fin Bay is 96.14%.
Is Big Fin Bay high volatility?
Big Fin Bay is rated high volatility. High volatility concentrates the return in rare, large wins.
What is the max win on Big Fin Bay?
The maximum win on Big Fin Bay is 15,040x your stake, which is $15,040 on a $1 spin.
Can I play Big Fin Bay for free?
Yes. GambGenius members can play the official Thunderkick demo of Big Fin Bay free on this page. It uses play money only, so demo wins can't be withdrawn, and it is for players aged 18 and over.
Does Big Fin Bay have a bonus buy?
No bonus buy is listed for Big Fin Bay in the sources we checked.
Where can I play Big Fin Bay?
Opalis carries Thunderkick games. Check Big Fin Bay is in the lobby in your country before you sign up. 18+ · New customers · T&Cs apply. Availability varies by country.
Where this data comes from
- thunderkick.com Provider
- slotcatalog.com Slot database
Specs come from the provider's own site and 1 independent slot database. Casinos can run lower-RTP versions, so always check the game rules before you play.
Game artwork © Thunderkick, shown to identify the game.
