Play the Big Bass Boxing Bonus Round demo for free
Try the Big Bass Boxing Bonus Round demo below before you read the review. It is a free slot you can play for free with no real money at stake, so it is a safe way to try before you play for real. 18+ only.
Big Bass Boxing Bonus Round is a Pragmatic Play slot from the Reel Kingdom studio that takes the fishing format of the Big Bass series and puts it in a boxing ring. It uses five reels, three rows and ten paylines, and its bonus is a free spins round where collected wilds feed retriggers and a rising multiplier. You can play the Big Bass Boxing Bonus Round demo for free at the top of this page.
This review covers the RTP figures reported, the volatility rating that sources describe in two different ways, the 5,000x maximum win in pounds, the free spins feature, and the few statistics that only one source gives. It sits alongside the rest of our Big Bass slots and our Pragmatic Play slots hub, and it is a close cousin of our Big Bass Vegas Double Down Deluxe review.
Big Bass Boxing Bonus Round at a glance
| Detail | Figure |
|---|---|
| Provider | Pragmatic Play (built by Reel Kingdom) |
| Released | 9 June 2025 (one source only, others give no date) |
| Layout | 5 reels, 3 rows, 10 paylines |
| RTP | 96.50% (96.71% also reported, and lower versions may be offered) |
| Volatility | High (sources say high and very high, both 5 out of 5) |
| Maximum win | 5,000x the stake |
| Stakes | From 10p, with a top stake of 250 reported by one source and £5 by two others |
| Main bonus | Free spins with wild collection meters, retriggers and multipliers |
| Bonus frequency | About 1 in 113 spins (two sources) |
| Hit frequency | 12.99% (one source, unconfirmed) |
| Bonus buy | Not published in the sources we checked |
Overview
The theme is the obvious joke in the title: the fishing format of the Big Bass series is moved into a boxing ring, and the free spins round is where the big numbers arrive. One source describes it as a clone of the Big Bass Vegas Double Down Deluxe game and another says it borrows the same statistical set-up, so anyone who has played that slot will recognise the shape of the maths.
Reviewers broadly agree on the character of the slot. The base game is described by one reviewer as quiet, with the bonus round carrying the excitement. Another calls the free spins round a good one and the 5,000x cap unremarkable next to the largest caps in the wider market. Our view is that it suits players who already like the series and want a boxing skin on a familiar mechanic.
How to play and stakes
The game is played on a five reel, three row grid with ten paylines. Stakes start at 10p a spin, which every source that gives a figure agrees on. The top stake is where sources split. One source gives 250 as the maximum bet, while two others give £5. The £5 figure is more likely to reflect what UK operators allow, but we cannot confirm which applies at a given casino, so check the game information screen before you play.
Wins come from matching symbols on the paylines. The sources we checked describe the free spins round in much more detail than the base game, and the main extra they mention is a pair of wild collection meters that feed retriggers and multipliers. The rules screen inside the game is the place to confirm exactly how every symbol behaves.
RTP and the versions you may meet
Most sources list the RTP at 96.50%. One source lists 96.71% instead, and another says the figure is adjustable and may be lower on some sites. Operators can run different RTP versions of Pragmatic Play slots, so the percentage you see here is a reference point and not a promise about the version at your casino.
The RTP describes the long-run return across a very large number of spins. It tells you nothing certain about a short session, and the demo above is a way to judge feel, not to measure return. We have not found lower RTP versions named in the sources we checked, so we do not list any.
Volatility
Volatility is rated high by most sources and very high by two, both of which describe it as 5 out of 5. In plain terms that means wins can be uneven, with long quiet stretches and a handful of larger payouts, mostly coming from the bonus round. One source puts the average bonus trigger at roughly one in 113 spins, which gives a sense of how often you would expect to reach the feature that matters.
If you prefer steady, frequent small returns, this is probably not the slot for you. If you enjoy waiting for a bonus round with a multiplier that can climb, the volatility rating fits the design.
Max win and what it is worth in pounds
The maximum win is 5,000x the stake, and every source we checked agrees. One source puts the chance of reaching the cap at roughly one in 2,544,391 spins, which is a single figure we could not confirm elsewhere.
In pounds, 5,000x is £500 on a 10p stake, £5,000 on a £1 stake and £25,000 on a £5 stake. That is simple multiplication, not a figure from the studio. Remember that reaching the cap ends the round, and that the practical chance of getting there on any one session is very small.
Free spins, wild meters and multipliers
The free spins round is the heart of the game. Sources describe wilds being collected in two meters, with retriggers and a progressive win multiplier. One source says every fourth wild of the same colour retriggers the round with 10 extra spins and raises the multiplier, and another says the multiplier can reach 10x. Those two descriptions fit together, although neither source gives a full table of the steps.
We did not find a reliable figure for how many free spins you start with, or how many scatters trigger the round, in the sources we checked. We have therefore left both out. Check the in-game rules, or the Pragmatic Play game page, if that detail matters to you.
Bonus buy and extras
A bonus buy option is not mentioned in the sources we checked, so we cannot say whether one exists or what it would cost. Where a casino offers a feature purchase, the cost and RTP can differ from the base game, and the game information screen will state it.
Symbols and paytable
We have not listed symbols or paytable values, because the sources we checked do not publish them in a form we could verify. The paytable inside the game, opened from the menu, is the reliable source for symbol payouts at your stake.
Hit frequency and win rate
One source gives a hit frequency of 12.99%, meaning roughly one spin in eight returns something. No second source confirms it, so treat it as indicative. The bonus is reported at about one in 113 spins by two sources, which is a more useful guide to how long a session might run between feature rounds.
As with the RTP, these are long-run averages. They do not predict what the next hundred spins will do.
Is Big Bass Boxing Bonus Round enjoyable? Our verdict
Big Bass Boxing Bonus Round is a competent entry rather than a standout. The boxing skin is cheerful, the RTP is average to slightly above, and the free spins round with collected wilds and rising multipliers is the reason to play. The 5,000x cap is modest for a high volatility slot, and a quiet base game means the demo is worth a proper go before you commit real money.
If you want something more varied, try our Big Bass Mission Fishin’ review for a slot that offers a choice of bonuses, or our Big Bass Return to the Races review for another Big Bass variant. Gambling should be fun and 18+ only. Set limits before you play.
Pros and cons
Pros
- A free spins round with wild collection, retriggers and multipliers.
- A 96.50% RTP that most sources agree on.
- Familiar Big Bass mechanics with a new boxing theme.
Cons
- The base game is described as quiet.
- A 5,000x max win is modest for a high volatility slot.
- Sources disagree on volatility wording, top stake and one RTP figure.
Big Bass Boxing Bonus Round FAQ
What is the RTP of Big Bass Boxing Bonus Round?
Most sources list 96.50%. One lists 96.71%. Operators can choose which version to run, so check the game information at your casino.
How volatile is Big Bass Boxing Bonus Round?
Sources call it high or very high, and both are given as 5 out of 5. Expect uneven results with most of the excitement in the bonus round.
What is the maximum win on Big Bass Boxing Bonus Round?
5,000x the stake, which every source agrees on. That is £500 at a 10p stake and £25,000 at a £5 stake.
What are the stakes on Big Bass Boxing Bonus Round?
Stakes start at 10p. One source gives a top stake of 250 and two others give £5, so check your casino for the limit that applies.
How does the free spins bonus work?
Wilds are collected in meters during free spins, with retriggers and a rising multiplier. One source says every fourth wild of the same colour retriggers with 10 extra spins.
How high can the multiplier go?
One source says multipliers can reach 10x in the free spins round. We did not find a full step-by-step table.
How many spins does the free spins round start with?
Not published in the sources we checked. The in-game rules will state it.
Is there a bonus buy on Big Bass Boxing Bonus Round?
Not published in the sources we checked, so we cannot say whether one is offered.
How often does Big Bass Boxing Bonus Round pay?
One source gives a hit frequency of 12.99%, and two sources give a bonus trigger of about 1 in 113 spins. These are averages, not predictions.
When was Big Bass Boxing Bonus Round released?
One source gives 9 June 2025. The others do not state a date, so treat it as unconfirmed.
Can I play the Big Bass Boxing Bonus Round demo for free?
Yes. The Big Bass Boxing Bonus Round demo at the top of this page is free to play and uses no real money. It is for over-18s only. A short demo session tells you little about the long-run return that the RTP describes.
Is there a free play version of Big Bass Boxing Bonus Round for UK players?
The free demo above is the free play version, so you can try before you play for real. Check the game information at your casino for the RTP version and stake limits that apply to you.
How we checked the figures
- RTP, volatility, max win, stakes and features: Gambling.com, Online-Slot.co.uk, AboutSlots, PokerListings and OLBG game pages, compared for conflicts and read on 5 October 2026.
- Hit frequency, bonus frequency and max win probability: AboutSlots, with the bonus frequency also seen at PokerListings.
- Where sources disagree we say so. The Pragmatic Play game page was not used for any figure, so none is confirmed with the studio.
- Maximum win in pounds is 5,000 multiplied by the stake.
