Slot guide
Big Bass Bonanza slot review: RTP, free spins and sequels
Pragmatic Play's 2020 fishing slot in which fisherman wilds collect money symbols during free spins, with retrigger multipliers.
Big Bass Bonanza is Pragmatic Play's December 2020 fishing slot: five reels, three rows, ten lines, an RTP of 96.71% and high volatility, with a listed top win of 2,100x the stake. Its whole design points at the free spins round, where fisherman wilds collect the values on money fish. That number comes from a game database; Pragmatic's own text speaks of money symbols worth up to 2,000x in the bonus.
Big Bass Bonanza: spec sheet
From the provider's published game sheet.
- Provider
- Pragmatic Play
- RTP
- 96.71%
- Volatility
- High
- Max win
- 2,100x stake
- Reels
- 5
- Rows
- 3
- Lines
- 10
- Released
- 2020
Features
- Free spins triggered by scatters
- Fisherman wilds collect money fish values in free spins
- Retriggers raise the collection multiplier to 2x, 3x and 10x
RTP can be set lower by some casinos; the game's own help screen shows the figure that applies. 18+ only.
Free spins and the collecting fisherman
Scatters trigger the free spins. During the round, money fish land with cash values attached, and each fisherman wild that appears collects every value on screen. Retriggers do more than add spins: they raise the collection multiplier to 2x, then 3x, then 10x. So a round that reaches the later retriggers can pay many times more than one that never does, which is where the high volatility comes from.
How Big Bass Bonanza compares with Fishin' Frenzy
The two games are often confused. Fishin' Frenzy, from Blueprint, came first and uses the same idea of a fisherman collecting fish values; Big Bass Bonanza is Pragmatic Play's take on it, with retrigger multipliers and a higher listed RTP than Fishin' Frenzy's default build. Our Fishin' Frenzy review covers Blueprint's original and its RTP builds.
Big Bass Bonanza RTP, stakes and bonus buy in the UK
At 96.71% the return is above many classic slots, but it is a long-run average and some operators may run a lower build: the game's information screen shows the figure at your casino. Stakes at GB-licensed casinos are capped at £5 per spin for online slots, or £2 if you are aged 18 to 24. The features listed for the original do not include a bonus buy, so searches for a Big Bass Bonanza bonus buy usually concern later sequels; check each version's own rules.
Sequels: Bigger Bass, Big Bass Splash, Megaways and more
Pragmatic has turned the game into a long series: Bigger Bass Bonanza, Big Bass Splash, Big Bass Bonanza Megaways, Big Bass Bonanza 1000, Reel Action, Christmas editions and others. Each has its own RTP, maximum win and features. Some casinos tie welcome spins to a sequel rather than the original - for example, 666 Casino's offer is 20 spins on Big Bass Splash when you deposit and wager £20
18+, new players, first deposit; £20 must be wagered on Big Bass Splash within 7 days; spins on Big Bass Splash; 0x wagering on winnings
Spins on Big Bass Splash cannot be used on Big Bass Bonanza itself.
Big Bass Bonanza demo and free play
This site has no playable demo. Pragmatic Play publishes its games through licensed casinos, which may offer a demo mode, and GB rules require age verification before demo or real-money play. The free slots page explains how demo access works in Great Britain. Searches for Big Bass Bonanza free spins with no deposit in the UK lead to casino promotions; their terms set spin value, expiry, eligible game and any winnings cap, and wagering on bonus funds is capped at 10x since 19 January 2026. Compare formats on the free spins bonuses page.
Several licensed casinos name Pragmatic Play among their providers or list Big Bass titles by name; they appear beside this review. 18+ only - the responsible gambling page explains limits, time-outs and GAMSTOP.
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 |  Bella CasinoRank Interactive (Gibraltar) Limited | Score: 7.9 out of 10, good | 100 bonus spins on Kong 3 Even Bigger Bonus when you deposit and stake £10 Significant terms New players; min deposit £10 (Paysafecard excluded) and £10 stake on Kong 3 Even Bigger Bonus; 10x wagering; max win £200 |
| Visit Bella Casino (opens the operator site in a new tab)Read the review: Bella Casino |
| Place 2 |  666 CasinoJupiter Gaming Limited | Score: 7.8 out of 10, good | 20 spins on Big Bass Splash when you deposit and wager £20 Significant terms 18+, new players, first deposit; £20 must be wagered on Big Bass Splash within 7 days; spins on Big Bass Splash; 0x wagering on winnings | Not listed | Visit 666 Casino (opens the operator site in a new tab)Read the review: 666 Casino |
| Place 3 |  Amazon SlotsJumpman Gaming Limited | Score: 7.7 out of 10, good | Chance to win up to 500 bonus spins on Starburst Significant terms 18+, new players, £10 min fund; bonus spins winnings subject to 10x wagering; max bonus conversion equal to lifetime deposits up to £250; only bonus wagers count |
| Visit Amazon Slots (opens the operator site in a new tab)Read the review: Amazon Slots |
| Place 4 |  Pub CasinoL & L Europe Limited | Score: 7.4 out of 10, good | 50 cash spins on Octobeer Fortunes after depositing and wagering £10 Significant terms Deposit and wager £10; activate before depositing; spins £0.20 each, winnings paid as cash, no max cash out; Skrill deposits excluded; spins expire in 48 hours |
| Visit Pub Casino (opens the operator site in a new tab)Read the review: Pub Casino |
| Place 5 |  LuckyMateAnakatech Interactive Limited | Score: 7.4 out of 10, good | 50 bonus spins on Big Bass Splash when you bet £10 on slots Code MATE50 Significant terms £10 min deposit; £10 in slot bets; 50 spins at £0.10 (£5 total); x1 wagering, £1 max bet contribution; £100 max cashout from winnings; 7-day expiry; selected payment methods only | Not listed | Visit LuckyMate (opens the operator site in a new tab)Read the review: LuckyMate |
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Questions readers ask
What is the Big Bass Bonanza RTP?
The original is listed at 96.71%. Check the game's information screen, as casinos may run a different build.
What is the maximum win on Big Bass Bonanza?
Game databases list 2,100x the stake. Pragmatic's own text refers to money symbols worth up to 2,000x in the bonus.
How do the multipliers work in Big Bass Bonanza?
Retriggers during free spins raise the collection multiplier to 2x, then 3x, then 10x, applied to the fish values the fisherman collects.
Is Big Bass Splash the same as Big Bass Bonanza?
No. Big Bass Splash is a sequel with its own maths and features, so offers on it cannot be played on the original.