Big Bass Amazon Xtreme slot review

Big Bass Amazon Xtreme slot explained

Big Bass Amazon Xtreme is part of the long-running Big Bass series from Reel Kingdom, which started with Big Bass Bonanza on 14 December 2020. Reel Kingdom's games are distributed by Pragmatic Play. The "Xtreme" in the name is a fair signal: the game carries the top 5/5 volatility rating on its own in-game scale.

The series' signature mechanic is a fisherman wild that collects the cash values shown on fish symbols. How that works in Amazon Xtreme, including a base-game collect feature and retriggers, is covered in the next section; the paytable gives the exact multiplier at each level.

How the features work in Big Bass Amazon Xtreme

Fish-shaped money symbols are the currency of this game: each one carries a cash value. Unlike the earliest Big Bass titles, those values aren't always stranded in the base game. A random feature can step in on an ordinary spin, collect the fish values on screen and apply a multiplier to them, so a base-game spin can sometimes pay out from fish alone.

The free spins start with three or more scatters. Land more than three and the game opens a pick stage before the round, where you can win modifiers. Our checked data gives two examples: extra spins, and the removal of the lowest-value fish, which leaves only the better values on the reels for the rest of the round.

Once the round is under way, the Fisherman wild is the collector. Each time he appears, he scoops up the value of every money symbol in view. His appearances are tracked too: every fourth Fisherman collected retriggers the round, adding 10 more spins and raising the multiplier on fish values from then on. That ladder is how the game reaches 10,000× while carrying a 5/5 volatility rating, because the largest results need a round that climbs several levels with valuable fish on screen.

The starting number of spins, the multiplier at each level and the full list of pick options aren't in our checked data, so check the paytable. OLBG's Amazon Xtreme review (opens in a new tab) outlines the same features.

How Big Bass Amazon Xtreme compares with the rest of the series

Reel Kingdom has released many Big Bass games on the same 5×3, 10-line base, and the numbers show how much the formula has been stretched. The original paid up to 2,100×; Amazon Xtreme pays up to 10,000×, but at a lower top RTP.

The pattern is clear: the 10,000× games in the series list 96.07% at best, against 96.71% for the earlier, lower-capped titles. On £1,000 of spins that 0.64-point gap is about £6.40 on average. The bigger ceiling is paid for partly through a slightly higher edge and partly through rougher swings.

Big Bass Amazon Xtreme RTP: three versions

Casinos can choose between three settings. Each one looks and plays the same; only the long-run return to player changes. The table shows what that means at three common stakes.

The lowest setting costs about half as much again as the highest. To check, open the game's rules from the menu and read the RTP line. Our page on why slot RTPs vary between casinos explains the trade-off operators make.

Very high volatility: a £20 session on Big Bass Amazon Xtreme

A 5/5 volatility rating means the game concentrates its return into infrequent, large results. In practice that means many short sessions that return little, and a few that return a lot. It doesn't change the average cost; it changes how far any one session can stray from it.

With very high volatility, the 20 spins a £1 stake allows from £20 can easily come and go with little returned. At 10p you get at least 200 spins, enough to see far more of how the game behaves. We don't quote how often any feature triggers, because we haven't seen a figure published by the developer.

The 10,000× max win on Big Bass Amazon Xtreme

10,000 times the stake works out at £1,000 on a 10p spin, £5,000 on 50p, £10,000 on £1, £20,000 on the £2 limit for 18 to 24-year-olds and £50,000 on the £5 limit for players aged 25 and over. Once a win reaches the cap, the round ends there.

That's nearly five times the original game's 2,100× ceiling. A higher cap isn't a better deal by itself; it describes how the payouts are spread. Our page on what a slot's max win means and the slot myths guide explain why caps and past results say nothing about the next spin.

How to play Big Bass Amazon Xtreme online

1. Sign up with a UK-licensed casino and complete age and identity checks.
2. Open the game and read the paytable, the feature rules and the RTP shown.
3. Pick a stake within your age limit; all 10 lines play on every spin.
4. Start each spin manually; autoplay and turbo aren't allowed on UK slots.
5. Use the on-screen time and net position to stay within your plan.

There's no bonus buy on British versions. Since a Gambling Commission warning in January 2020, feature buy-ins are not offered to British players. Our page asking whether you can buy bonus rounds on UK slots covers the detail.

UK rules for Big Bass Amazon Xtreme

Every online slot in Great Britain carries the same protections. The stake limits are £5 per game cycle for players 25 and over (since 9 April 2025) and £2 for players aged 18 to 24 (since 21 May 2025), as set out in the Commission's online slots stake limit guidance (opens in a new tab).

See our game design rules page for the full list and what each rule covers.

Big Bass Amazon Xtreme verdict

It suits Big Bass fans who want more swing and accept shorter sessions at the same stake. If you'd prefer more spins for your money, the original game or a low volatility slot is a calmer choice. Wizard of Odds' slot guide (opens in a new tab) explains how slot returns vary between markets, and Pragmatic Play's site (opens in a new tab) lists the studio's distributed titles. If you want a break from gambling, GAMSTOP (opens in a new tab) lets you self-exclude from all UK-licensed sites.

Where to play Big Bass Amazon Xtreme: partner offers

PlayOJO's welcome spins are on Big Bass Bonanza, a sister game in the same series, not on Amazon Xtreme; Coral's and Ladbrokes' spins are on selected games. Check the casino's game lobby for Big Bass Amazon Xtreme and its RTP version. 18+ and terms apply.

PlayOJO gives 18+ new UK customers (not in Northern Ireland) 80 free spins on Big Bass Bonanza when they first deposit £10 or more; each spin is 10p. Winnings have no wagering and are paid as cash, and the offer must be claimed through the designated link and can't be added to other offers.

Coral Casino gives 18+ new players 100 free spins at 10p on selected games when they deposit and bet £10 or more on slots between 1 October 2026 and 1 February 2027. They must be accepted within 48 hours and used within 7 days, winnings aren't wagered, and Neteller, PayPal, Paysafe, Skrill, prepaid cards and certain debit cards are excluded.

Ladbrokes Casino gives 18+ new customers who deposit and spend £10 or more on slots 50 free spins a day for 10 days, up to 500 in total, at 10p each on selected games. Claim before 23:59 each day and use within 7 days, with no wagering; prepaid card, PayPal, Paysafe, Neteller, Skrill and Moneybookers deposits are excluded.

Coral and Ladbrokes are run by the same company, LC International Limited (part of Entain), so you may be able to hold a new account at only one of them. Full terms apply.

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.