The Big Bass Amazon Xtreme slot is Pragmatic Play’s 2023 jungle-river edition of the fishing series, rated 5 out of 5 for volatility with a 10,000x maximum win. It keeps the familiar 5x3, 10-line layout but adds a choice of six bonus modifiers and a fisherman-collecting multiplier, at an RTP of up to 96.07%.
Default RTP96.07% (95.08% and 94.05% versions exist)
VolatilityVery high (5/5 on the in-game scale)
Max win10,000× stake
DeveloperReel Kingdom (released by Pragmatic Play)
Volatility is the top 5/5 on Pragmatic’s own scale: long dry spells are normal.
Three RTP versions exist (96.07%, 95.08% and 94.05%); the info screen shows which one you’re on.
Before free spins you pick one of six modifiers, such as extra fish, extra fishermen or starting at level two.
The 10,000x cap is £2,000 at a 20p stake and £50,000 at the £5 UK maximum.
Developer
Reel Kingdom (released by Pragmatic Play)
RTP
96.07% (95.08% and 94.05% versions exist)
Volatility
Very high (5/5 on the in-game scale)
Layout
5 reels × 3 rows
Ways to win
10 fixed paylines
Max win
10,000× stake
Released
2023
What the Xtreme in Big Bass Amazon Xtreme means
Most Big Bass Bonanza spin-offs change the scenery and tweak a feature. Amazon Xtreme changes the risk profile. Pragmatic Play’s in-game meter puts it at 5 out of 5 for volatility, the top of its scale, and the 10,000x cap is almost five times the original game’s 2,100x. The extra ceiling has to be paid for somewhere, and it’s paid for with a thinner base game and longer gaps between meaningful wins.
Put simply, the game is built so that a lot of sessions end with nothing remarkable, while a small number produce results far above anything the earlier titles could reach. That is the deal on offer, and it’s worth deciding whether you want it before you choose a stake.
Volatility describes how a slot’s return is spread out, not how much it returns overall. A 5/5 game and a 2/5 game with the same RTP cost the same on average over millions of spins; they just get there by very different routes.
Amazon setting, symbols and layout
The fisherman has left his usual lake for the Amazon, which Pragmatic Play’s page describes as fishing the world’s longest river. The backdrop is dense rainforest and muddy water, and the symbol set mixes upgraded versions of the series’ tackle-box, rod and float icons with new jungle additions. Fish symbols carry cash values, and the fisherman acts as the collector during free spins.
The grid is the series’ standard 5 reels by 3 rows with 10 fixed paylines. Line wins pay left to right from reel 1. If you already know the series, the reels will look familiar; the differences are in the feature.
Big Bass Amazon Xtreme RTP: three versions compared
Pragmatic Play publishes 96.07% as the default and supplies casinos with 95.08% and 94.05% versions too. The gap between the top and bottom versions is just over two percentage points, which sounds small. Over a long spell of play it isn’t.
RTP version
Average loss per £100 staked
Average loss over 500 spins at 40p (£200 staked)
96.07%
£3.93
about £7.86
95.08%
£4.92
about £9.84
94.05%
£5.95
about £11.90
On the lowest version, the average cost is about 51% higher than on the default. On a very high-volatility game you won’t notice this in a single session, because the swings are much larger than the difference. Over months, you will. Our guide to why RTP differs between casinos explains why operators pick different versions.
Open Big Bass Amazon Xtreme at your casino.
Tap the menu or the ‘i’ icon to open the game rules.
Scroll to the section headed with the theoretical return or RTP.
Note the figure; if it reads 95.08% or 94.05%, you are on a reduced version.
Compare with the same game at another licensed site if the version matters to you.
What 5/5 volatility means for a real session
Take a £40 budget. At 20p a spin that is 200 spins, which at the UK minimum of 2.5 seconds a spin is a little over eight minutes of play, and longer in practice. On a 5/5 game, it’s entirely possible for those 200 spins to produce only small line wins and no free spins at all. Equally, a single bonus can return many times the budget. Neither outcome tells you anything about the next session.
The practical response is to choose a stake that gives you enough spins to see the bonus at least occasionally, and to accept that the session may end early. Raising the stake to ‘catch up’ after a dry run is chasing losses, and it doesn’t make the feature any more likely. Our slots budget guide and how long £100 lasts work through similar maths.
Free spins and the six-way modifier choice
Scatter symbols trigger the free spins feature, and the paytable shows how many spins each scatter count gives. What sets Amazon Xtreme apart is the step before the round starts. Pragmatic Play describes a ‘super feature’ in which you choose one of six game-altering modifiers. Options include adding more fish to the reels, adding more fishermen, or starting the round already at level two of the multiplier ladder.
The choice doesn’t change the overall RTP; the maths behind each option is balanced so that every pick returns the same on average. What it changes is the shape of the round. More fish increases the number of cash values on screen when a fisherman lands; more fishermen increases how often collections happen; starting at level two front-loads the multiplier. Pick according to taste, not because one option is secretly better.
Collecting fishermen and the rising multiplier
During free spins the fisherman works as a wild and collects the cash value of every fish on screen when he lands. Pragmatic Play’s description says the angler also hunts for additional fishermen, and collecting them unlocks an increasing win multiplier. That ladder is the engine behind the 10,000x figure: a late-round fish collection under a high multiplier is how the largest results happen.
Here’s an illustration with round numbers. At a 20p stake, three fish worth 5x, 10x and 25x are on screen when a fisherman lands: 40x in total, or £8. Under a 1x multiplier that’s £8; under a higher level, the same collection is multiplied again. The exact multiplier values and collection thresholds are listed in the game rules, so check them there rather than assuming they match the original game.
How to play Big Bass Amazon Xtreme
Pass your casino’s age verification; demos are only available afterwards in the UK.
Check the RTP version in the game rules.
Set your stake. The maximum is £5 for players aged 25+ and £2 for 18–24s.
Spin manually; each spin takes at least 2.5 seconds and autoplay isn’t available.
When scatters trigger free spins, choose one of the six modifiers.
Watch the fisherman collections and the multiplier ladder until the round ends.
Big Bass Amazon Xtreme max win: 10,000x in context
A 10,000x cap is £1,000 at 10p, £2,000 at 20p and £10,000 at £1. At the £5 limit for players aged 25 and over it reaches £50,000. Within the series, only a few titles go this high; Big Bass Hold & Spinner shares the same figure.
The cap is a theoretical top, not a likely result. Reaching it requires a full multiplier ladder and a screen of high-value fish at the right moment. For most sessions the realistic upside is a bonus worth tens of times the stake. Our page on high max win slots explains how to read these ceilings.
UK rules that apply to Amazon Xtreme
Outside Great Britain, many Big Bass titles include a feature buy. British players don’t get that option, so the only way into free spins is through normal play. The UK slot rules also mean £5 or £2 maximum stakes depending on age, a 2.5-second minimum spin time, no autoplay or turbo, and a net position display. These rules make very high-volatility games slower to play through, which many players find helps them keep track.
The original has the higher default RTP and a calmer profile. Amazon Xtreme gives up some RTP and a lot of steadiness for a higher ceiling and the pre-bonus choice. For the wider genre, see our fishing slots page.
Big Bass Amazon Xtreme pros and cons
Advantages
10,000x cap is high for the series
Six-way modifier choice adds variety to each bonus
Familiar 10-line layout is easy to follow
Same game for UK players apart from the bonus buy
Drawbacks
5/5 volatility makes for long dry spells
Default RTP is lower than the original’s 96.71%
Two reduced RTP versions are in circulation
Base game alone rarely pays much
It suits players who already know the series, have a budget sized for long gaps, and want the higher ceiling. Newer players are usually better served by the original Big Bass Bonanza.
Where to play Big Bass Amazon Xtreme
Search the Pragmatic Play section of a UK casino’s lobby and check the RTP version before staking. PlayOJO’s welcome offer (18+, new UK customers excluding Northern Ireland, £10 first deposit) gives 80 no-wagering spins at 10p on the original Big Bass Bonanza rather than this game. Casumo’s 50% match up to £100 (£20 minimum, 10x wagering within 7 days, £5 max bet) and 10bet’s 100% match up to £25 (10x on slots within 3 days) can be used on eligible slots. T&Cs apply.
PlayOJO’s 80 no-wagering spins are on the original Big Bass Bonanza, not Amazon Xtreme. Casumo’s and 10bet’s match bonuses can go on slots more widely, subject to each site’s game restrictions. 18+, T&Cs apply.
Significant terms: 18+. New UK customers (excluding Northern Ireland). First deposit only. Minimum deposit £10. 80 free spins on Big Bass Bonanza, £0.10 each. No wagering requirements; winnings paid in cash. Cannot be used with any other offer. Only available to players who arrive through the designated offer link. Full T&Cs apply. GamCare.org.uk
Read the PlayOJO reviewLicence: Skill On Net Limited, UKGC account 39326. Offer checked 5 October 2026.
Significant terms: 18+. New customers only. Opt-in required. 50% deposit bonus up to £100 on first deposit. Minimum deposit £20. 10x wagering on the bonus amount. Maximum bet or spin £5. Bonus valid for 7 days. Game, play and payment method restrictions apply. Full T&Cs apply. GamCare.org.uk
Read the Casumo reviewLicence: Recro Limited, UKGC account 61549. Offer checked 5 October 2026.
Significant terms: 18+. New UK customers only. Select the casino welcome bonus at sign-up and make your first deposit within 7 days. 100% bonus up to £25. Wager the bonus 10x on slots within 3 days. Maximum bonus winnings £1,000. Bonus is not redeemable. Full T&Cs apply. GamCare.org.uk
Read the 10bet reviewLicence: Blue Star Planet Limited, UKGC account 43173. Offer checked 5 October 2026.
18+. Gambling should be entertainment that costs money, not a way to make it. Set a deposit limit before you play: how to set limits. Free, confidential help: National Gambling Helpline 0808 8020 133.
Frequently asked questions
What is the RTP of Big Bass Amazon Xtreme?
The default RTP is 96.07%, and Pragmatic Play also offers casinos 95.08% and 94.05% versions. On the default, the average long-run cost is about £3.93 per £100 staked; on the lowest version it’s about £5.95. You can confirm the version in the game rules, reached through the menu or info icon. These figures describe millions of spins, not a single session. Our RTP guide and what a good RTP is explain how to use them.
Is Big Bass Amazon Xtreme high volatility?
Yes, it is very high volatility, shown as 5 out of 5 on Pragmatic Play’s in-game scale. That means most spins return little or nothing, free spins can take a long time to arrive, and most of the game’s return comes from occasional large bonuses. A session of a couple of hundred spins can end with no feature at all. Size your stake so your budget lasts, and expect losses over time. Our volatility guide and high volatility slots page cover what this means in practice.
What is the max win on Big Bass Amazon Xtreme?
The maximum win is 10,000 times your stake. That is £2,000 on a 20p spin, £10,000 on £1, and £50,000 on a £5 spin, the highest stake allowed for UK players aged 25 and over. Reaching it needs a high multiplier level and a screen full of valuable fish during free spins, which is extremely rare. Most bonuses pay a small fraction of that. For how caps work, see what max win means and what happens when a slot hits max win.
What are the six modifiers in Big Bass Amazon Xtreme?
Before free spins begin, you choose one of six modifiers that change how the round plays. Pragmatic Play’s description says the options include more fish on the reels, more fishermen, or starting the round at level two of the multiplier ladder. The full list, with exact effects, is in the game rules. Each option is balanced so the average return is the same; the choice changes how the round feels, not its expected value. Our slot features guide explains how studios balance choices like this, and the free spins slots page lists similar games.
Can you buy the bonus on Big Bass Amazon Xtreme in the UK?
No. Feature buys aren’t offered to players in Great Britain, so you can only reach free spins by landing scatters in normal play. Versions of the game in other countries may show a buy button, but UK-licensed casinos remove it. That also means every UK spin takes at least 2.5 seconds, with no autoplay or turbo. Read can you buy bonuses on UK slots for the background and UK slot rules for the full list of restrictions.
How is Amazon Xtreme different from Big Bass Bonanza?
Amazon Xtreme keeps the original’s 5x3, 10-line layout but is far more volatile and has a much higher cap: 10,000x against 2,100x. It adds a pre-bonus choice of six modifiers and a fisherman-collecting multiplier ladder. The default RTP is lower, at 96.07% against 96.71%. The original is the calmer, cheaper-to-run option over time; Amazon Xtreme trades that for a bigger ceiling. Our Big Bass Bonanza review and the Big Bass Bonanza vs Big Bass Splash comparison show how the series varies.
When was Big Bass Amazon Xtreme released?
Pragmatic Play released Big Bass Amazon Xtreme in 2023, part of a busy year for the series that also produced Big Bass Halloween, Big Bass Christmas Bash and Big Bass Hold & Spinner. It moved the series to a new setting, the Amazon river, and pushed the volatility to the top of Pragmatic’s scale. You can see how other releases from the same period compare on our new slots page and our Pragmatic Play slots profile.
What stake should I use on Big Bass Amazon Xtreme?
A stake that gives you at least a couple of hundred spins from your budget is a sensible starting point on a 5/5 volatility game. For a £40 budget that means 20p or less. Higher stakes make the budget disappear faster without improving the odds of the bonus, which is the same on every spin. Never raise the stake to recover losses. UK limits cap spins at £5 for over-25s and £2 for 18–24s. See what stake to play and should you bet max.
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