Big Bass Amazon Xtreme 

By Zena Grantham | Updated 10 July 2026

Big Bass Amazon Xtreme is a video slot developed by Reel Kingdom, released on 19 June 2023. The game returns to the familiar Big Bass formula but leaves the lakes behind for the Amazon rainforest. The series’ returning fisherman is joined by new bonus modifiers, random events and extra ways to collect valuable Money Symbols.

Big Bass Amazon Xtreme UK builds on mechanics found in earlier Big Bass releases rather than changing the core format. The Fisherman Wild remains the centrepiece of the game, while the Free Spins feature introduces a modifier selection before the bonus begins. Random collections and in-feature events create additional opportunities to collect Money Symbols in both the base game and Free Spins.

Although the layout will feel familiar to existing Big Bass fans, Big Bass Amazon Xtreme packs more into each session than many previous releases. New random modifiers appear throughout the game, the Free Spins feature develops through progressive levels, and several bonus events can change the outcome of individual spins. We’ll cover each of these mechanics in detail throughout this review.

Technical

Big Bass Amazon Xtreme slot is played on a 5-reel, 3-row layout with 10 fixed paylines. Winning combinations are formed by landing matching symbols on adjacent reels from left to right. The Fisherman Wild substitutes for all regular paying symbols except the Scatter and Money Symbols.

The slot is available on desktop and mobile devices, with bets ranging from 10p to £250 per spin. Big Bass Amazon Xtreme is highly volatile and has a maximum win of 10,000x the bet, although UK players are restricted to a maximum stake of £5 per spin.

Big Bass Amazon Xtreme UK has a default RTP of 96.07%. Lower RTP versions of 95.08% and 94.05% are also available through selected operators.

Although the layout follows the familiar Big Bass formula, several new mechanics distinguish this release from earlier titles. Random collections, bonus modifiers and progressive multiplier levels all play a larger role in how the base game and Free Spins develop.

Design & Symbols

Big Bass Amazon Xtreme UK transports players from familiar lakes to the Amazon rainforest, while retaining the visual style that made the Big Bass games instantly recognisable. The reels are positioned beneath the river’s surface, with dense jungle, overhanging vines and a lone fisherman drifting across the water above. Air bubbles rise behind the symbols, creating the impression that the action is unfolding below the river, while the familiar Big Bass logo remains prominently displayed above the reels.

Big Bass Amazon Xtreme slot UK retains the classic 5-reel, 10-payline format, with wins awarded by landing three or more matching symbols on adjacent reels from left to right.

The low-value symbols are the Royal card symbols, with five matching symbols awarding between 5x and 10x the bet.

The high-value symbols are the backpacks, fishing rods, toucans, and fishing floats. Five matching premium symbols award between 50x and 200x the bet, while the highest-paying fish symbol awards 0.5x the bet from two matching symbols.

The Fish symbols are Money Symbols that display random cash values. The Fisherman Wild substitutes for all regular paying symbols and collects Money Symbols during the Free Spins feature. Three or more Jumping Fish Scatter symbols trigger the Free Spins, where bonus modifiers, retriggers, and progressive multipliers expand the feature even further.

Features

Big Bass Amazon Xtreme expands on the classic Big Bass formula with several new mechanics that increase the way to collect Money Symbols and enhance the Free Spins feature. The game includes the Fisherman Wild, Money Symbols, Free Spins, Ante Bet and Bonus Buys.

Fisherman Wild Symbol

The Fisherman Wild is the most important symbol in Big Bass Amazon Xtreme. During the base game, it substitutes for all regular paying symbols except the Jumping Fish Scatter and Money Symbols, helping to complete additional winning combinations.

Its main role is during the Free Spins feature. Whenever the Fisherman Wild lands on the reels, it collects the values of every Money Symbol that appears on the same spin. Those values are then added to the total payout for that spin, making the Fisherman Wild essential to unlocking the biggest win potential.

Money Symbols

Money Symbols appear in the base game and Free Spins, with each fish displaying a value of 0.2x, 0.5x, 1x, 2x, 3x, 4x, 5x, 10x, 15x, 20x, 25x, 50x, 200x, 250x, 333x, 500x or 1,000x the bet.

During the base game, a random event collects every Money Symbol on the reels. The combined value is then multiplied by 1x, 2x, 3x, 4x, 5x, 10x, 20x, 30x, 40x or 50x before being awarded.

Collections work differently during the Free Spins. A Fisherman Wild must land on the same spin as one or more Money Symbols to collect their displayed values. The multiplier starts at 1x and increases as Fisherman Wilds fill the progression meter, retriggering the feature.

Free Spins & Modifiers

Landing three or more Jumping Fish Scatter symbols awards 10 Free Spins. If only two Scatter symbols appear, Big Bass Amazon Xtreme includes two random opportunities to complete the trigger. Scatter symbols already on the reels can lock in place while the remaining reels respin. Or, a hook can randomly catch a third Scatter to activate the feature.

Before the Free Spins begin, you’ll choose from a selection of hidden modifiers, revealing objects until you uncover a boot. Landing four or five Scatter symbols reveals one or two boot symbols before the selection process starts, increasing the chance of uncovering multiple modifiers.

More Free Spins

Awards one, two or three additional Free Spins each time it’s revealed. Up to six extra spins are available before the feature begins.

Guaranteed Fish
Awards +1 Fish symbol. The modifier can be awarded up to 3 times, providing up to 3 guaranteed Fish symbols on every Free Spin throughout the bonus round.

Collected Fisherman Wilds

Adds up to three Fisherman Wilds to the progression meter before the feature starts. You’ll have a head start towards the first retrigger.

Remove Lowest Fish

Removes the lowest-value Money Symbols from the prize pool. The first modifier removes the 2x symbol, while the second removes the 5x symbol.

Free Spins Progression

Each Fisherman Wild collected during Free Spins is added to the progression meter above the reels. After four Fisherman Wilds are collected, players receive 10 additional Free Spins and advance to the next level.

The Free Spins begin with a 1x Money Symbol multiplier. The first retrigger increases the multiplier to 2x. Followed by 3x, 10x, 20x, 30x, 40x and finally 50x after the seventh retrigger. Once the eighth level is reached, the multiplier no longer increases, and no additional Free Spins are awarded.

Ante Bet

The Ante Bet increases the stake by 50% and Scatters land more frequently, improving the chance of triggering the Free Spins.

Bonus Buy

The Bonus Buy allows you to purchase the Free Spins feature for 100x the stake. The following spin awards three, four or five triggering Scatters. However, the Bonus Buy is not available to UK players.

Verdict

Big Bass Amazon Xtreme builds on the established Big Bass formula without losing the straightforward gameplay that made the series so popular. The pre-bonus modifier selection, random Money Symbol collections and expanded progression meter introduce more variety than earlier releases. However, the familiar Fisherman Wild remains central to the biggest payouts.

Players who enjoyed the original Big Bass Bonanza will find a more feature-rich experience here. It includes additional mechanics throughout the base game and during Free Spins. The extra features are easy to follow. This makes Big Bass Amazon Xtreme UK one of the strongest entries in the Big Bass series so far.

Big Bass Amazon Xtreme FAQs

Zena Grantham

News Editor at Slotfruit

Zena Grantham has been part of the Slotfruit team since the very beginning, making her one of the site’s longest-serving contributors. As news editor, she is responsible for the majority of Slotfruit’s industry news coverage — from UKGC enforcement actions and regulatory developments to major slot releases and record-breaking jackpot wins.

With well over 15 years of experience in the UK gambling sector, Zena has an encyclopaedic knowledge of the industry. She tracks everything from licensing changes and operator consolidations to emerging trends in game design, and her reporting keeps Slotfruit readers ahead of the curve on the stories that matter.

Zena’s writing is grounded in accuracy and a genuine understanding of how the industry works — both for operators and players. Whether it’s a £3.6 million jackpot win or a major policy shift from the Gambling Commission, she makes sure the facts are straight and the context is clear.

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