Big Bass Amazon Xtreme slot review

Big Bass Amazon Xtreme slot basics

The Big Bass games come from Reel Kingdom, a studio whose titles reach casinos through Pragmatic Play. The series began with Big Bass Bonanza in December 2020, and Amazon Xtreme, released in 2023, is one of the higher-risk versions.

The grid is the series’ usual five reels and three rows, here with 10 fixed paylines. The “Xtreme” in the name is backed up by the figures: very high volatility, rated 5 out of 5 on the game’s own scale, and a 10,000x maximum win, nearly five times the original game’s cap.

How the features work in Big Bass Amazon Xtreme

Fish money symbols

Some fish carry a cash value printed on them. On their own in the base game they don’t pay; they need something to collect them.

The base-game collect feature

Here, fish values can also be collected outside the bonus. A random feature in the base game can gather the money symbols on screen and apply a multiplier to their total, giving ordinary spins an occasional extra payout.

Free spins and the pick stage

Three or more scatters start the free spins. If more than three land, the extra scatters open a pick stage first. The picks can add modifiers to the coming round, such as more spins, or removing the lowest-value fish so that every fish that lands is worth more.

The Fisherman and retriggers

During free spins, the Fisherman is the wild. Whenever he lands, he collects the values of every fish money symbol in view. Fishermen are also counted across the round: every fourth one collected retriggers the feature with 10 more spins and raises the multiplier applied to fish values.

That ladder is the heart of the game. A round that never reaches four Fishermen tends to pay modestly, while one that climbs the ladder can multiply every later catch, which is why results are so uneven.

Three RTP versions of Big Bass Amazon Xtreme

Pragmatic Play supplies this game at 96.07%, 95.08% or 94.05%, and the casino picks one. There’s no visual difference, so the only way to know is the game’s rules screen. The house edge is 100% minus the RTP, and over enough spins it is the price you pay.

The lowest version costs about half as much again as the highest. The Gambling Commission requires game rules and return information to be available to players under its standard on rules and the likelihood of winning (opens in a new tab), and our guide to finding a game’s RTP in an app shows where to look.

What 5/5 volatility means for £20 at 10p, 50p and £1

Very high volatility means most of the game’s return is held back for rare, large results. For a short session, the most likely outcome is that a budget is used up without a big catch, and sometimes without reaching free spins at all.

The average loss is the same at every stake, but the experience is not. Twenty spins at £1 give the scatters very few chances; 200 at 10p give many more. With a game this swingy, a low stake is the sensible way to see the features within a fixed budget.

Big Bass Amazon Xtreme vs other Big Bass slots

The series shares the Fisherman collect idea, but the numbers vary a lot between versions. Here is how Amazon Xtreme sits against the others we review.

Amazon Xtreme gives up a little RTP against the original (0.64 points at the top versions) in exchange for a much higher cap and the base-game collect. If you prefer a steadier version, the original has lower volatility and the higher top RTP. Our slots hub lists every Big Bass review we publish.

Big Bass Amazon Xtreme on mobile

Pragmatic Play distributes its games in HTML5, so this slot loads inside casino apps and mobile browsers. A 5×3 grid with 10 lines reads well on any phone; cash values on the fish can look small on a compact phone, so a larger screen helps.

1. Download a UK-licensed casino app from the official App Store or Google Play listing. Our Android install guide covers safe installation.
2. Complete age and identity verification before you deposit.
3. Set a deposit limit when prompted before the first deposit.
4. Search the lobby for “Amazon Xtreme” to skip past the other Big Bass titles.
5. Open the paytable and rules, and check which of the three RTP versions the casino runs.
6. Choose a stake you could repeat many times within your budget, and start each spin yourself.

Slots use little mobile data once loaded, but the first load is heavier. Our guide to casino app data usage gives the general picture.

Stake caps and feature buys in the UK

In Great Britain, online slot stakes are capped at £5 a spin for players aged 25 and over and £2 for those aged 18 to 24, following the government’s announcement of the online slot stake limits (opens in a new tab). The 10,000x cap at £2 would be £20,000, and at £5 it would be £50,000.

Since a Gambling Commission warning in January 2020, feature buy-ins are not offered to British players, so the free spins and pick stage can only be reached by landing scatters. Videos from other markets may show a buy button you won’t see here.

• No autoplay, and at least 2.5 seconds per spin.
• No turbo or slam-stop.
• No celebrations for returns equal to or less than the stake.
• Net spend and time played shown in real time.

Our slot stake limits page explains the age checks behind the two caps.

Reel Kingdom and Pragmatic Play

Reel Kingdom is best known for the Big Bass series, and its games are distributed by Pragmatic Play. Its breakthrough came with Big Bass Bonanza on 14 December 2020; other titles include Floating Dragon, Emerald King and Return of the Dead. Several of its games share a top RTP of 96.71%, which makes Amazon Xtreme’s 96.07% a little lower than many of its stablemates.

Pragmatic Play, founded in 2015 and headquartered in Gibraltar, handles distribution and is licensed in Great Britain and more than 30 other jurisdictions, according to Pragmatic Play’s own site (opens in a new tab).

Common mistakes with Big Bass Amazon Xtreme

• Assuming every Big Bass game pays the same. RTPs, caps and volatility differ across the series, as the table above shows.
• Ignoring the version. The gap between 96.07% and 94.05% is real money over a session.
• Thinking a bonus is “due”. Each spin is random and independent, so a long gap since the last free spins changes nothing.
• Raising stakes to reach the feature. The house edge is the same at every stake, so a higher stake just raises the average cost.
• Confusing offer spins with this game. PlayOJO’s welcome spins are on Big Bass Bonanza, not Amazon Xtreme.

Play for entertainment, with money you can afford to lose. If it stops feeling that way, the National Gambling Helpline (0808 8020 133) is free and open 24/7.

Where to play Big Bass Amazon Xtreme in the UK

PlayOJO’s offer is the closest fit to this page because its spins are on Big Bass Bonanza, the game that started the series. We can’t confirm which apps carry Amazon Xtreme itself, so check the lobby. All three offers are 18+, for new customers, and terms apply.

• PlayOJO: make a first deposit of £10 or more to get 80 free spins on Big Bass Bonanza at 10p each, with winnings paid as cash and no wagering. Open to new UK customers except in Northern Ireland, only via the designated offer link, and not combinable with other offers.
• Coral: 100 free spins at 10p each on selected games when you deposit (certain methods excluded) and bet at least £10 on slots. Accept within 48 hours; use within 7 days; no wagering on what the spins win. Runs from 1 October 2026 to 1 February 2027.
• Ladbrokes: after depositing and spending £10 or more on slots, collect 50 free spins a day for 10 days, up to 500, valued at 10p on selected games. Each day’s spins must be claimed by 23:59 and are valid for 7 days, with no wagering.

Because LC International Limited runs both Coral and Ladbrokes, you may only be able to open a new account with one. PayPal, Neteller, Skrill, Paysafe and prepaid card deposits are excluded from both. Our PlayOJO welcome bonus page works through the value of the Big Bass Bonanza spins.

18+. Every casino game has a built-in house edge, so over time you should expect to lose what you stake. Set a budget before you play and stop when it’s gone: safer gambling tools and support. Free, confidential help: National Gambling Helpline 0808 8020 133.