The Big Bass series is the most successful fishing-themed slot franchise in the UK market, built by Reel Kingdom and released under Pragmatic Play.
Every game in the collection shares the same core structure — a Fisherman Wild symbol that only appears during free spins, where it collects the cash values displayed on fish money symbols and triggers retriggers and multipliers every time a fourth fisherman lands.
The formula is deliberately simple: a quiet base game with almost nothing happening, then an escalating bonus round where the money can snowball quickly through retriggers. What distinguishes each entry is how Reel Kingdom has layered new mechanics on top of that foundation, or in some cases how little they have. Feel free to browse our full selection of free demo games below and play them in practice before you wager any real money.
Big Bass Bonanza
The original. Released in December 2020, it established the template everything else builds on. A 5×3 grid with 10 paylines, fish money symbols that only activate during the bonus, a Fisherman Wild that collects their values. Three scatters trigger 12 free spins.
Each Fisherman Wild also upgrades the lowest-value symbol on the paytable to the next tier up, so as the bonus runs the symbol mix gradually shifts toward higher-paying fish. Every fourth fisherman retriggers ten more spins and increases the collection multiplier (2x, then 3x, then 10x). Max win 2,100x, RTP 96.71%.
Big Bass Splash
The first major iteration, released in 2022. The grid and the Fisherman Wild mechanic are unchanged, but Splash introduced two things the original lacked.
Before free spins begin, a random modifier is applied from five options including more fish on the reels, more fishermen, boosted mid-bonus events, starting the feature at level two, or two extra spins added to every retrigger. Random events can also activate mid-bonus, interrupting dry spells with extra wilds or fish. Max win rises to 5,000x; RTP holds at 96.71%.
Big Bass Amazon Xtreme
The most mechanically ambitious entry on the page. Amazon Xtreme’s pre-bonus pick allows multiple modifiers to stack before a single free spin is played — extra fishermen, symbol removals, and guaranteed fish prizes can all combine. During the bonus itself, eight retrigger levels are available instead of the standard four, and the collection multiplier can reach 50x rather than the usual 10x.
Fish money symbols in the base game can also carry random multipliers of up to 50x, which is unique to this entry. High volatility with a 10,000x max win and an RTP of 96.07%.
Big Bass Boxing Bonus Round
The theme shifts to a boxing gym, with the fisherman in training gear and a punch-bag substituting for the aquatic backdrop. The main mechanical distinction is scatter count: three, four, or five scatters award 15, 20, or 25 free spins, respectively, compared to the standard 10/15/20 across most other entries. This means the bonus round starts with more spins on the clock on average. RTP 96.50%, max win 5,000x.
Big Bass Floats My Boat
Released early 2024, this entry introduced the only genuinely novel mechanic in the standard-grid version of the series. Each of the 15 grid positions starts the bonus at a 1x multiplier, and any position that does not contribute to a win on a given spin sees its multiplier increment upward. This creates a growing floor of value across the grid the longer the bonus runs without a fisherman collecting. The base game also occasionally triggers a random money collect with a bonus multiplier applied. RTP 96.07%, max win 5,000x.
Big Bass Vegas Double Down Deluxe
Released September 2024, the Vegas entry split the Fisherman Wild into two colour variants, a red and a blue, each tracked on its own collection meter. They operate independently, so filling the red meter to four wilds retriggers with a multiplier boost, as does filling the blue meter, and neither interferes with the other’s progression. The result is two concurrent retrigger ladders running in parallel during free spins. The neon Vegas aesthetic is a genuine visual departure from the lakeside default. RTP 96.5%, max win 5,000x.
Big Bass Raceday Repeat
The horse racing spin-off, where money symbols become racehorses and the fisherman suits up for the track. Before free spins begin, players choose from 12 racing gates to potentially reveal a modifier for the round, including more money symbols, higher retrigger multipliers (up to 20x versus the standard 10x), fewer wilds needed to retrigger, or a Mega that applies all three.
The Repeat mechanic, accessed via a paid ante bet, can replay the entire bonus round at the end, retaining accumulated winnings while resetting the spin counter. RTP 96.51%, max win 5,000x.
Big Bass Halloween 3
The third Halloween entry in the series, released October 2025. The fisherman is now a zombie, the backdrop is fog-covered and moonlit, and pumpkin scatters replace the usual fish.
Mechanically, it runs the same dual-fisherman system as Vegas Double Down Deluxe, applying blue and red wilds with independent meters in a horror context. The most recent seasonal entry in the collection. RTP 96.5%, max win 5,000x.
Big Bass Bonanza 1000
Part of Pragmatic Play’s 1000 series, which upgrades existing hits with a new 1,000x money symbol and a substantially higher max win. The mechanics are identical to the original, with one notable change: fish money symbols can now reach 1,000x during free spins. In the original, the top individual fish was worth 2,000x, so individual symbols are actually lower — but the max win expands to 20,000x because more symbols combine across the retrigger multiplier stages. A Super Free Spins buy at 450x increases the probability of landing the 1,000x symbol. RTP 96.51%.
Big Bass Splash 1000
The same 1000 treatment applied to Big Bass Splash, released December 2025. The Splash modifier system carries over intact, with the same five pre-bonus options and the same mid-bonus random events.
Fish money symbols are capped at 1,000x rather than the 5,000x ceiling in the original Splash, but the max win jumps to 25,000x, the highest on this page. RTP 96.52%.
