Big Bass Boom

Big Bass Boom slot game featuring cowboy fisherman in white hat and sunglasses holding fishing rod with underwater blue background and bass fish money symbols
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Pragmatic Play powered slot verified by Reel Kingdom – High volatility with 97.97% RTP

97.97%
RTP
5,000x
Max Win
10
Paylines
5x3
Reel Grid
£0.10
Min Bet
£250
Max Bet
97.97%
Return

Certified Theoretical Return to Player

Big Bass Boom delivers one of the highest RTP values in the Pragmatic Play fishing series at 97.97%, giving players excellent long-term value across extended sessions.

This independently verified rate means that for every £100 wagered across all spins, the game mathematically returns £97.97 to players over time, making it a fair and transparent choice for those seeking high-quality slot entertainment.

High Volatility Rating

Big Bass Boom carries a high volatility classification, meaning wins occur less frequently but with significantly larger payout potential when they land.

4 out of 5

High volatility suits players with larger bankrolls who can withstand longer dry spells in pursuit of those explosive 5,000x max win moments during the free spins feature.

Core Game Features

Wild Collection Mechanic

During free spins, every Wild symbol that lands collects all Money Fish values currently visible on the reels. Wilds accumulate throughout the bonus round.

Every 4th Wild triggers retrigger
10x

Progressive Multipliers

Free spins feature includes four multiplier levels. Start at 1x, advance to 2x at the 4th Wild, reach 3x at the 8th Wild, then hit the maximum 10x multiplier at the 12th Wild collected.

Up to 10x on all collections

Money Fish Symbols

Every spin, fish symbols display random cash values ranging from 2x up to a massive 5,000x your total bet. Values are collected only when a Wild lands during free spins.

Up to 5,000x bet value

Win Potential Calculator

Calculate your potential returns based on different bet levels and multiplier combinations in Big Bass Boom.

Potential Win
£50.00

Symbol Paytable

All values shown are for maximum 5-of-a-kind combinations at £250 max bet

Monster Truck
£50,000
200x bet
Fishing Rod
£25,000
100x bet
Dragonfly
£12,500
50x bet
Tackle Box
£12,500
50x bet
Money Fish
£5,000
20x bet + cash
A / K
£2,500
10x bet
Q / J / 10
£1,250
5x bet
Wild
Collects
Free spins only
Big Bass Boom stands out in the crowded fishing slot market with its progressive multiplier system that genuinely rewards persistence. The 10x multiplier at level four combined with high-value Money Fish creates genuine excitement, and the 97.97% RTP is refreshingly honest for high volatility gameplay. The random features—Dynamite, Hook, and Bazooka—prevent dead spins and maintain momentum throughout the bonus round.
— Marcus Hyland, Slot Analyst

How to Play Big Bass Boom

1

Set Your Bet Level

Use the plus and minus buttons to adjust your total bet between £0.10 and £250.00. The game plays across 10 fixed paylines, so your total bet is automatically distributed. Higher bets increase Money Fish values proportionally.

2

Spin the Reels

Press the large spin button featuring the Reel Kingdom gorilla icon to start the game. The 5x3 grid spins and symbols land from left to right. Wins are paid on any of the 10 paylines starting from the leftmost reel.

3

Trigger Free Spins

Land three or more Scatter symbols (bass fish leaping from water) anywhere on the reels to trigger the free spins bonus. Three Scatters award 10 spins, four Scatters give 15 spins, and five Scatters grant 20 free spins.

4

Collect Money Fish with Wilds

During free spins, Wild symbols (the fisherman character) collect all Money Fish values visible on screen. Wilds are stored, and every fourth Wild collected retriggers the feature with 10 additional spins plus a multiplier increase.

Frequently Asked Questions

The maximum win is capped at 5,000x your total bet. If you're playing at the maximum bet of £250.00, this translates to a potential £1,250,000 payout. Once the 5,000x cap is reached during a free spins round, the feature immediately ends and all remaining spins are forfeited.
During free spins, every Wild symbol that lands collects the cash values displayed on all Money Fish symbols currently visible on the reels. These Wilds are stored throughout the bonus round. After every fourth Wild collected, you receive 10 additional free spins and your multiplier increases (2x at 4 Wilds, 3x at 8 Wilds, 10x at 12 Wilds).
Every spin, Money Fish symbols display random values: 2x, 5x, 10x, 15x, 20x, 25x, 50x, 100x, 200x, 500x, 1,666x, 2,500x, or 5,000x your total bet. These values are only collected when a Wild lands during the free spins feature, not in the base game.
These are random features during free spins. Dynamite: adds Money Fish symbols when Wilds are present but no fish. Hook: pulls a reel up to add Wild symbols when fish are present but no Wilds. Bazooka: transforms all non-Wild symbols when Wilds are present but no fish. These features prevent dead spins and increase win potential.
No, the retrigger mechanic is capped at four levels. You can retrigger at 4, 8, and 12 Wilds collected, reaching the maximum 10x multiplier at level four. After reaching level four, no additional retriggers are possible, though you can still collect Wilds and Money Fish values at the 10x multiplier rate.

Advantages

  • Exceptionally high 97.97% RTP offers excellent long-term value
  • Progressive multiplier system up to 10x creates escalating excitement
  • Money Fish values up to 5,000x provide genuine max win potential
  • Random features (Dynamite, Hook, Bazooka) prevent stagnant bonus rounds
  • Transparent bet range from £0.10 to £250 suits all bankrolls
  • Wild collection mechanic is intuitive and visually satisfying

Considerations

  • High volatility means extended periods without significant wins
  • Base game offers limited excitement compared to bonus features
  • Maximum four retrigger levels caps the longest potential sessions
  • 5,000x win cap ends the feature immediately when reached
  • Random feature activation can feel inconsistent session to session

Responsible Gaming Notice

Big Bass Boom is a high volatility slot designed for entertainment purposes. The 97.97% RTP is a long-term theoretical value and does not guarantee wins in any individual session. Set deposit limits, never chase losses, and only play with money you can afford to lose. If you feel your gambling is becoming problematic, seek help from organizations like GamCare or BeGambleAware. Players must be 18+ or the legal age in their jurisdiction.