Super Tuna Overload
demo and specs

Spinberry released Super Tuna Overload on 23 July 2026, a 5-reel fishing-themed slot built around a reel-respin mechanic with fixed paylines. The studio has published an RTP of 93.29%, a medium volatility rating and a maximum win of 5,000x your stake. Stakes run from £0.10 to £200, giving the game wide reach from casual sessions up to higher-stakes play.

The fishing theme draws on a classic maritime visual style with a tuna character at the centre of the action. It is aimed at players who want a recognisable mid-range volatility slot with a clear bonus loop, rather than a layered multi-stage feature set that demands active management across a session.

The four named features, Free Spins, Scatter Symbols, a Wild and a Buy Feature, build on the reel-respin core without making the session architecture difficult to follow. Between feature triggers, the base game is a straightforward spin-and-match loop across five reels.

Spinberry has published the headline numbers clearly: RTP, volatility band, maximum win, the full stake range and the names of all four features. What is not yet publicly documented is the detail beneath those names, including exact scatter trigger counts, the number of spins in the Free Spins round and the specific conditions governing the reel-respin sequence. Those are genuine gaps in the published spec, not missing gameplay, and this page is updated when the studio fills them.

A **5,000x** ceiling on a medium-volatility reel-respin slot paired with one of the lower RTPs currently published on the UK market.

The RTP is 93.29%. The rough UK market average sits at about 96%, so Super Tuna Overload returns around 2.7 percentage points less per pound wagered over a long session. In cash terms, the theoretical long-run cost on every £100 staked is around £6.71 here versus roughly £4 at the market average. That gap is not felt in a single session but compounds meaningfully over months of regular play or at higher stakes.

It is worth being clear about what RTP is and is not. It is a long-run theoretical average across millions of spins, not a session-by-session guarantee. In any given hour, the difference between a 93% and a 96% game is not legible in the results. For players who spin at volume or who treat return-per-pound as a primary filter, however, 93.29% puts Super Tuna Overload towards the expensive end of the medium-volatility field.

Medium volatility places the game in the middle of the risk spectrum. The base game produces a regular enough stream of smaller wins to keep a session moving, with the reel-respin and Free Spins rounds providing the upswings. Dry spells still occur, they are a feature of any slot with a meaningful bonus-round structure, but they are typically shorter and shallower than what a high-volatility title demands. Losing runs of 20 to 40 spins are a realistic expectation here, rather than the 60 to 100-spin runs that can define a high-volatility session.

The maximum win is 5,000x your stake. At the minimum stake of £0.10, that ceiling equals £500. At the maximum stake of £200, it reaches £1,000,000. For reference, a £1 spin gives a £5,000 ceiling, a £2 spin gives £10,000 and a £5 spin gives £25,000. These figures come directly from Spinberry's published spec.

Spinberry has not published a hit-rate figure for Super Tuna Overload. Without one, the only guide to frequency is the volatility band: medium implies a base-game hit rate that is more frequent than a high-volatility title of similar ceiling, but the published spec does not quantify it. This page is updated if Spinberry releases that figure.

Super Tuna Overload's core mechanic is a reel respin. In general terms, a reel-respin round locks qualifying symbols in place on the grid and respins the remaining reels, building towards a larger prize cluster or triggering further awards. The four named features that layer on this core are:

• Scatter Symbols: special symbols that pay regardless of payline position; landing a qualifying number anywhere on the five reels triggers the bonus round. The exact scatter count required in Super Tuna Overload is not yet in the published spec.
• Free Spins: a bonus round where a set number of spins plays out at no extra cost. In reel-respin slots of this type, Free Spins often run with the same respin mechanics active, sometimes with enhanced reel conditions, though the specific setup for this game is not published.
• Wild: substitutes for other symbols to complete paying combinations across the fixed paylines. Active in the base game as a standard symbol. No enhanced multiplier or sticky behaviour is listed in the current published spec.
• Buy Feature: an option in the game's international build that lets a player pay a set multiple of their stake to enter the bonus round directly, bypassing the base-game trigger. The stake multiplier for the buy is not listed in the published spec.

Spinberry has not published the scatter trigger count, the number of Free Spins awarded, the Buy Feature cost multiplier or the specific conditions of the reel-respin sequence. This page is updated when the studio makes those details available. The Buy Feature is present in the international build but is switched off at every UKGC-licensed casino for GB players: the Gambling Commission prohibits bonus-buy functionality for players in Great Britain under its licence conditions, so GB players can only reach the bonus rounds through standard base-game play, regardless of what the game offers in other markets.

The base game runs on a 5-reel grid with fixed paylines. Fixed paylines mean every spin covers the same set of winning combinations; there is no option to adjust the line count or reduce coverage to lower the cost per spin. Between feature triggers, play is a straightforward spin-and-match loop: symbols land across the five reels, paying combinations settle according to the payline set, and the reel-respin mechanic provides the main route into bonus territory.

Stakes run from £0.10 to £200 per spin. The £0.10 floor suits casual players, those new to the game and anyone exploring the session rhythm without significant bankroll exposure. The £200 ceiling is for experienced players with the funds and risk appetite to absorb the swings that medium volatility produces at that level. As a general guide for medium volatility, a session bankroll covering around 100 to 150 spins at your chosen stake gives a realistic runway to reach the feature rounds at least a couple of times.

Mobile play runs under exactly the same rules and return as desktop. Spinberry builds to mobile-first standards, and at every UKGC-licensed casino the same stake limits, the same responsible gambling tools and the same 93.29% RTP apply on every device. There is no separate mobile build, no adjusted feature behaviour and no difference in how the reel-respin mechanic fires on a phone or tablet compared with a desktop browser.

Among reel-respin slots at medium volatility, Super Tuna Overload sits at the lower end of the RTP range. The 5,000x ceiling is a respectable mid-field figure: not among the highest the respin category offers, where some titles push considerably further, but a meaningful top prize for a medium-volatility slot. It avoids the brutal dry spells that accompany the genre's largest ceilings, which is a direct consequence of the volatility trade.

The trade the ceiling buys is a steadier session experience. In the respin genre, a higher ceiling almost always comes packaged with higher volatility: longer waits between feature triggers, deeper losing runs in the base game and a greater risk of exhausting a bankroll before the big respin sequence fires. Super Tuna Overload keeps the risk level manageable, which makes the 5,000x top prize more reachable within a realistic session than the highest-ceiling titles in the genre.

The RTP is the trade-off to weigh on the other side. At 93.29%, Super Tuna Overload gives back less per pound over time than most comparable medium-volatility respin titles. Players who weight their game selection primarily by long-run return will find steadier value elsewhere. Those who weight the combination of a real prize ceiling and a manageable risk level will find the balance here more attractive than titles that push the ceiling further but demand much greater volatility in exchange.

The game fits some player types clearly and is a poor match for others. Players the game suits:

• Casual players at lower stakes: the £0.10 minimum and medium volatility keep session costs and swings manageable, and the reel-respin mechanic gives a clear bonus target without requiring complex strategy or a large bankroll.
• Mid-stakes players who want a real prize ceiling without extreme risk: 5,000x at medium volatility is a meaningful top prize that does not demand the patience a high-volatility title requires, making it more realistic within a normal session.
• Players who prefer a clean, contained feature set: four named features built on a single core mechanic is a simple architecture, and the base game is easy to follow between bonus triggers without active management.

Skip it if the RTP is your primary filter. At 93.29%, Super Tuna Overload is one of the more expensive games to run at volume on the UK market, and a player who spins regularly at even a modest stake will find their bankroll erodes faster than on comparable medium-volatility alternatives. Also skip it if the Buy Feature matters to your session style: GB players at UKGC-licensed casinos cannot access it, and you are committed to triggering bonus rounds through normal base-game play only.