Slot guide
Big Bass Mission Fishin' slot: Stack the Cash or free spins
Reel Kingdom's 2024 Big Bass game, where flying fish scatters lead either to upgraded free spins or to a four-respin Stack the Cash mode.
The Big Bass Mission Fishin' slot is a 2024 entry in Reel Kingdom's Big Bass series, distributed by Pragmatic Play. It runs on five reels, three rows and 10 lines, returns 96.5% in theory, is rated high volatility and caps the top win at 5,000x the stake. What sets it apart from the older fishing games is a fork in the road: when the flying fish scatters land, they lead either to free spins or to a hold-and-win style mode called Stack the Cash.
Big Bass Mission Fishin': spec sheet
From the provider's published game sheet.
- Provider
- Pragmatic Play (Reel Kingdom)
- RTP
- 96.5%
- Volatility
- High
- Max win
- 5,000x stake
- Reels
- 5
- Rows
- 3
- Lines
- 10
- Released
- 2024
Features
- Free spins from 3, 4 or 5 flying fish scatters: 10, 15 or 20 spins, or the Stack the Cash mode
- Stack the Cash: hold-and-win style feature with four respins and robo-crab coin collection
- Wild fishermen fill a meter in free spins, upgrading multipliers to x2, x3 and x10
- Base game nudge and respin
- Ante bet raises the stake by 50%
- Free spins buy at 100x stake where permitted (not in the UK)
RTP can be set lower by some casinos; the game's own help screen shows the figure that applies. 18+ only.
Two routes from the flying fish scatters
Three, four or five flying fish scatters award 10, 15 or 20 free spins, or the Stack the Cash mode in their place. In free spins the familiar Big Bass logic applies. Wild fishermen land and fill a meter, and each stage of that meter upgrades the multiplier, first to x2, then x3 and finally x10. The upgrades are where the larger results come from, so a round in which the meter barely moves tends to pay modestly.
Stack the Cash is shorter and more contained. It runs on four respins, and a robo-crab collects the coin values that land on the reels. Players who prefer a feature with a visible running tally may find it easier to follow than a long free spins round, though the high volatility rating applies to both.
Base game extras
Between features the game can nudge a reel or award a respin, which gives some near misses a second look. An ante bet is also available: it raises the stake by 50%, and the game's info screen explains what it changes in the version in front of you.
Stakes and GB limits on the Big Bass Mission Fishin' slot
The published game details do not give a bet range, so the stake selector at the casino is the place to check. In Great Britain the rules settle the top end anyway. Since 9 April 2025 online slots at GB-licensed casinos have been capped at £5 per game cycle, and since 21 May 2025 the cap is £2 for players aged 18 to 24. The ante bet counts towards that limit, because it raises the stake you actually pay per spin. In some markets the game also sells direct entry to free spins at 100x stake, but that buy option is not part of the UK version. The slot stake limits guide explains how the caps apply.
Looking for a Big Bass Mission Fishin' demo
All British Casinos does not host playable games. Pragmatic Play shows its titles on its own website, and some licensed casinos offer a demo mode, but GB-licensed operators must check your age and identity before you play anything, free-play versions included. A demo is a fair way to see how often the scatters arrive and how the meter fills; it does not change the odds of the real-money game. The free slots page covers demo access in more detail.
Where it sits in the Big Bass family
Mission Fishin' keeps the fisherman collector and the multiplier meter that run through the series, then adds the Stack the Cash choice on top. If you know Big Bass Splash or Big Bass Bonanza, the free spins will feel familiar; the robo-crab mode is the new part. Casino lobbies usually list the game under Pragmatic Play or Reel Kingdom, and the operators shown beside this page name Pragmatic Play among their providers, though individual titles come and go. More on the studio is on the Pragmatic Play slots page.
18+ only. High volatility means long dry spells are normal, so decide on a budget first and see the responsible gambling page for limits and support.
UK-licensed casinos, ranked by our score
Order = score out of 10. Every operator holds a Gambling Commission licence.
| # | Casino | Score | Welcome offer and significant terms | Payments | Links |
|---|---|---|---|---|---|
| Place 1 |  MONOPOLY CasinoGamesys Operations Limited | Score: 8.5 out of 10, very good | 30 bonus spins on MONOPOLY Cash Is King after a £10 deposit and £10 slots wager Significant terms Min £10 deposit and £10 wager on slots; 30-day expiry from deposit; spins on MONOPOLY Cash Is King at 1p x 10 lines; free-spin winnings paid as cash; sports, bingo and live casino wagering do not count |
| Visit MONOPOLY Casino (opens the operator site in a new tab)Read the review: MONOPOLY Casino |
| Place 2 |  MrQTek Fox Ltd | Score: 8.5 out of 10, very good | 100 bonus spins on Big Bass Splash with the first £10 deposit, no wagering Significant terms First deposit £10; spins on Big Bass Splash at 10p; use within 48 hours; winnings uncapped and paid as cash (no wagering) |
| Visit MrQ (opens the operator site in a new tab)Read the review: MrQ |
| Place 3 |  Double Bubble BingoGamesys Operations Limited | Score: 8.2 out of 10, very good | Choice: £25 free bingo or 30 bonus spins on Double Bubble Cash Wall after a £10 deposit and £10 wager Significant terms Min £10 deposit and £10 wager; 30-day expiry from deposit; spins on Double Bubble Cash Wall at 1p x 10 lines; bingo ticket value based on £1 tickets; sports, bingo and live casino wagering do not count for spins |
| Visit Double Bubble Bingo (opens the operator site in a new tab)Read the review: Double Bubble Bingo |
| Place 4 |  JackpotjoyGamesys Operations Limited | Score: 8.2 out of 10, very good | Choice: £30 of free bingo or 100 bonus spins on Fishin Frenzy The Big Catch 2 after a £10 deposit and £10 wager Significant terms Min £10 deposit and £10 wager (on bingo for the bingo offer, on slots for spins); 30-day expiry from deposit; spins on Fishin Frenzy The Big Catch 2 at 1p x 10 lines; bingo value based on £1 tickets |
| Visit Jackpotjoy (opens the operator site in a new tab)Read the review: Jackpotjoy |
| Place 5 |  Unibet CasinoPlatinum Gaming Limited | Score: 8.1 out of 10, very good | 300 bonus spins (10p) on Big Bass Splash after a £30 deposit and stake on slots Significant terms Deposit and stake £30 on slots; 10x wagering; debit card or instant bank transfer only; claim within 7 days; spins expire in 48 hours; max stake applies |
| Visit Unibet Casino (opens the operator site in a new tab)Read the review: Unibet Casino |
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Questions readers ask
How volatile is Big Bass Mission Fishin'?
The spec rates it high volatility with a 96.5% return, so long gaps between features are normal. The game's help screen at the casino shows the figure for the version you are playing.
What is the difference between free spins and Stack the Cash?
Free spins give 10, 15 or 20 spins in which wild fishermen fill a meter that lifts the multiplier to x2, x3 and x10. Stack the Cash is a four-respin mode in which a robo-crab collects coin values.
Can I buy the free spins in the UK?
No. The 100x stake free spins buy exists only where it is permitted, and it is not part of the UK version.
Does the ante bet count towards the £5 stake limit?
Yes. The ante raises your stake by 50%, and the total you pay per spin must stay within £5, or £2 if you are aged 18 to 24.