3 Oaks Gaming Slots
3 Oaks Gaming, the Isle of Man studio formerly known as Booongo, reaches UK players through Commission-licensed operators under its parent’s UKGC software licence. This review covers its Hold & Win catalogue, checked RTP figures, volatility skew and the titles worth knowing.
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3 Oaks Gaming Overview
3 Oaks Gaming launched under its current name in 2021, but the studio traces back further: it was built on Booongo, a developer founded in 2015 that started life in Austria before moving its base to the Isle of Man. The company is registered in Douglas and sits under the parent group Green Rock Holding Limited, with Sebastian Damian as managing director and Yurii Muratov as chief commercial officer. For UK players, the licensing detail that matters is recent: the parent entity Green Rock Limited holds an Active UKGC Gambling Software licence (account 63055, in force from 9 February 2024), and the Commission approved the studio’s broad game portfolio in early 2025. 3 Oaks games therefore reach UK players through Commission-licensed operators, although the short regulated track record is worth keeping in mind. The studio also holds an Isle of Man software supplier licence and is reported to operate across more than ten jurisdictions.
The catalogue is mid-sized. Aggregator listings put it at 60 or more slots in 2026, with some counts reaching 80 to 100 once older and regional titles are included, and the studio adds roughly one to two new games a month. A portion of those releases are sequels or reskins of earlier titles, which is a fair thing to know before treating each launch as wholly new. Distribution runs through aggregators and integrations including SoftSwiss and IGT PlayDigital, with a 2025 partnership extending reach via EGT Digital, and the studio reports a player base in the millions. UK players can play 3 Oaks Gaming slots at Commission-licensed casinos that carry the supplier.
Visually, 3 Oaks builds bright, mobile-first HTML5 slots with 2D and 3D artwork and theme-matched sound, returning often to Ancient Egypt, Asian and Aztec settings, the Wild West, wildlife, Irish folklore and classic fruit machines, with jackpot and Lucky Drops layers added on top. RNG testing is reported through Gaming Associates Europe, with eCOGRA and Quinel also cited across the studio’s history. One limitation to flag early: 3 Oaks does not publish a single central list of return-to-player settings, so much of the per-title data below is checked against third-party tracking sites rather than a developer page.
What Makes 3 Oaks Gaming Slots Different
3 Oaks is, first and foremost, a Hold & Win studio. The respin-and-collect bonus is the centre of gravity for most of the catalogue, usually paired with fixed jackpot tiers and, increasingly, network Lucky Drops. That focus is deliberate: the company has publicly described its aim as being among the best in the Hold & Win niche rather than chasing breadth across every mechanic. The trade-off for players is consistency of style over surprise, and a maths profile that leans heavily on the bonus round.
The second defining trait is a return-to-player posture that sits a little below the market. Most 3 Oaks titles land around 95.50% at their highest setting, which is under the rough 96.00% industry average, and operators can deploy reduced versions on top of that. A handful of titles break the pattern upward, but they are the exception rather than the rule. Max-win ceilings are also comparatively contained: many core titles cap between 750x and 10,000x, lower than the 20,000x-plus that has become common elsewhere, with only occasional outliers reported higher. For UK players weighing 3 Oaks Gaming slots in 2026, that combination of below-average headline RTP and contained ceilings is the honest summary.
| Metric | 3 Oaks Gaming | Industry Average |
| Catalogue Size | 60+ slots (some lists 80-100+) | — |
| Typical RTP Range (highest setting) | 95.47% to 96.50% (most near 95.50%) | ~96.00% |
| Volatility Range | Medium to Very High (skews High) | — |
| Typical Max Win | 750x to 10,000x (outliers higher) | — |
| Bonus Buy Available | Many non-UK titles; not at UKGC operators | — |
| New Releases per Month | 1-2 | — |
| UKGC Licence | Yes (via Green Rock Limited, account 63055) | — |
The RTP range above reflects the highest available setting for each title. Many UK casinos run reduced versions of supplier games, so the figure you play may be lower than the one quoted here. The only reliable way to know is to check the paytable in the specific game at your chosen casino.
Best 3 Oaks Gaming Slots Ranked
The list below gathers the best 3 Oaks Gaming slots for UK players by balancing checked return-to-player at the highest setting, max-win potential, how distinctive the mechanic is, and documented popularity, while being candid where a figure was not clearly published. Because 3 Oaks RTPs cluster tightly around 95.50%, popularity and feature design carry more weight here than small RTP gaps. Rankings are based on a combination of verified RTP at highest setting, max win potential, mechanic originality, and documented player popularity across third-party tracking sites.
| Rank | Game | RTP (Highest Setting) | Volatility | Max Win | Key Feature |
| 1 | Sun of Egypt 3 | 95.61% | High | 10,000x | Ultra Hold & Win with sticky suns and fixed jackpots |
| 2 | Sun of Egypt 4 | 95.47% | Medium-High | 10,000x | Hold & Win plus a base-game Boost and five jackpots |
| 3 | Caishen Wealth Hold and Win | 95.53% | High | 5,000x | Hold & Win with four jackpots and sticky-wild free spins |
| 4 | Aztec Fire | 95.50% | Medium | 10,000x | Hold & Win respins, free spins and a jackpot |
| 5 | Big Heist | 95.54% | Very High | 3,170x | Collect and Super Collect with a free-spins round |
| 6 | Goddess of Egypt | 95.78% | Very High | Not clearly published | Cascading win-anywhere with free-spin multipliers |
| 7 | Wolf Saga | 96.06% | Medium-High | 1,272x | Hold & Win with sticky-wild free spins |
| 8 | Book of Sun: Choice | 95.76% | High | 5,000x | Book mechanic; 97.74% only via bonus buy (non-UK) |
| 9 | Scarab Boost | 95.89% | High | Not clearly published | Hold & Win respins with wild-multiplier free spins |
| 10 | 777 Gems Respin | 95.70% | Medium | 750x | Classic 3×3 gems with a respin bonus |
| 11 | Fishin’ Bear | 96.50% | Medium | Not clearly published | Hold & Win fishing theme with four jackpots |
| 12 | Magic Apple | Not clearly published | Medium | 2,000x | 6×4 fairytale slot with a Grand jackpot |
Figures are checked against third-party tracking sites rather than a central developer list, and several max-win values were not clearly published at the time of review. Treat the RTP column as the highest setting; your casino may run a lower one.
Sun of Egypt 3

Sun of Egypt 3 is the title most people mean when they talk about 3 Oaks, and it is a clean illustration of the studio’s house style. It plays on a 5×3 grid with 25 paylines and a checked RTP of 95.61% at the highest setting, with high volatility. The Hold & Win round triggers when six or more sun cash symbols land; they lock in place, the respin counter resets to three each time a new one appears, and filling the grid awards the Royal jackpot worth the game’s 10,000x ceiling, with a Super Hold & Win variant of higher-value symbols. A separate eight-spin free-spins feature strips out the low-value royals. The catch is the one that applies to most of the catalogue: with the payout concentrated in that bonus, the base game can stay quiet for long stretches. Stake limits vary by operator.
Caishen Wealth Hold and Win

A 2022 release on a 5×4 grid with 20 paylines, Caishen Wealth shows how 3 Oaks layers jackpots onto the core mechanic. The checked RTP is 95.53% at the highest setting, volatility is high, and the ceiling is a more modest 5,000x than the flagship Sun of Egypt line. The Hold & Win bonus uses Mystery Symbols that resolve into one of four fixed jackpot tiers, and the free-spins round adds wilds that turn sticky. It is a representative middle-of-the-road 3 Oaks title rather than a standout, and the 5,000x cap is a reminder that the studio’s jackpot games trade a higher ceiling for the chance at the tiered prizes.
Big Heist

Big Heist swaps the usual gold and temples for a cops-and-robbers theme on a 5×3 grid with 10 ways to win, and it is the most volatile of the featured set. The checked RTP is 95.54% and the design is built around Collect and Super Collect features that gather cash values, with five scatters awarding up to 15 free spins. The max win is a relatively low 3,170x, which is the honest catch here: the variance is very high, so the gap between meaningful wins can be long, yet the ceiling is well short of what some high-variance slots elsewhere offer. It suits players who want the theme and the swings rather than a headline jackpot.
777 Gems Respin

For a contrast, 777 Gems Respin is one of the studio’s pared-back classics: a 3×3 grid with five paylines, a checked RTP of 95.70% and medium volatility. The respin bonus, rather than a full free-spins round, is the main route to its 750x ceiling. That low cap is the point of the design, not a flaw — this is a steadier, lower-stakes alternative to the jackpot Hold & Win titles, aimed at players who prefer frequent small results over the long waits the bigger games demand. Anyone expecting a four- or five-figure multiplier should look elsewhere in the range.
3 Oaks Gaming Slots by Volatility
3 Oaks skews towards the higher end of the variance scale. The Hold & Win format concentrates most of a game’s return in the bonus round, so even titles rated medium can feel streaky, and the genuinely high and very high titles demand patience and a stake sized for long dry runs. The tiers below group the catalogue by that skew; only tiers with verified titles are shown.
Low and Medium Volatility
This is the smaller part of the range, and it is where the steadier sessions live. 777 Gems Respin is the natural entry point: medium volatility, a 95.70% return and a low 750x ceiling that suits longer, calmer play. Aztec Fire sits at medium too, but pairs that with a 10,000x ceiling and a jackpot, so the swings are larger despite the rating. Wolf Saga, at a higher 96.06%, is among the better-value titles in the catalogue.
| Game | RTP | Volatility | Max Win |
| 777 Gems Respin | 95.70% | Medium | 750x |
| Aztec Fire | 95.50% | Medium | 10,000x |
| Wolf Saga | 96.06% | Medium-High | 1,272x |
| Magic Apple | Not clearly published | Medium | 2,000x |
High Volatility
This is where much of the high-volatility range sits, pairing the studio’s sub-96.00% returns with the bigger Hold & Win jackpots and longer gaps between wins. As a rough frame for budgeting one of these, a player setting aside £50 at £0.50 a spin has 100 base spins before any feature lands — and on a high-variance Hold & Win title, the bonus may not arrive inside that window. Size the stake so the budget survives the dry runs, and treat the headline jackpots as rare outcomes rather than the expected result.
| Game | RTP | Volatility | Max Win |
| Book of Sun: Choice | 95.76% | High | 5,000x |
| Sun of Egypt 3 | 95.61% | High | 10,000x |
| Caishen Wealth Hold and Win | 95.53% | High | 5,000x |
| Sun of Egypt 4 | 95.47% | Medium-High | 10,000x |
Very High Volatility
A small group sits at the top of the scale, where the wins are rarest and the patience required is greatest. Big Heist is the clearest example, with a very high rating but a contained 3,170x ceiling, while Goddess of Egypt uses cascading win-anywhere play for its swings. One point on the sequels worth making: 3 Oaks runs saga lines such as Sun of Egypt 1 to 4, but these are successive titles with broadly similar maths rather than higher-variance reissues of the same game, so a later number does not automatically mean a more extreme version.
| Game | RTP | Volatility | Max Win |
| Big Heist | 95.54% | Very High | 3,170x |
| Goddess of Egypt | 95.78% | Very High | Not clearly published |
3 Oaks Gaming Slots by RTP
3 Oaks supplies its games to operators at more than one RTP setting, and the figures below are the highest published setting for each title. The studio does not publish a central list of the lower settings, so the lowest a given casino runs is shown as something to verify rather than a confirmed number. The pattern across the table is the studio’s defining trait: most 3 Oaks Gaming RTP figures sit a little below the 96.00% market average, with a few clear exceptions at the top.
| Game | Highest RTP | Lowest Known RTP Setting | Difference | Commonly Reduced? |
| Fishin’ Bear | 96.50% | Unknown — verify at your casino | Unknown | Operators may run reduced versions |
| Wolf Saga | 96.06% | Unknown — verify at your casino | Unknown | Operators may run reduced versions |
| Scarab Boost | 95.89% | Unknown — verify at your casino | Unknown | Operators may run reduced versions |
| Goddess of Egypt | 95.78% | Unknown — verify at your casino | Unknown | Operators may run reduced versions |
| Book of Sun: Choice | 95.76% | Unknown — verify at your casino | Unknown | Operators may run reduced versions |
| 777 Gems Respin | 95.70% | Unknown — verify at your casino | Unknown | Operators may run reduced versions |
| Sun of Egypt 3 | 95.61% | Unknown — verify at your casino | Unknown | Operators may run reduced versions |
| Big Heist | 95.54% | Unknown — verify at your casino | Unknown | Operators may run reduced versions |
| Caishen Wealth Hold and Win | 95.53% | Unknown — verify at your casino | Unknown | Operators may run reduced versions |
| Aztec Fire | 95.50% | Unknown — verify at your casino | Unknown | Operators may run reduced versions |
| Sun of Egypt 4 | 95.47% | Unknown — verify at your casino | Unknown | Operators may run reduced versions |
The spread matters more than it first looks. A title quoted at 95.50% carries a house edge of 4.50%. If an operator runs the same game at a reduced 94.00%, the edge rises to 6.00% — roughly a third more cost per spin over a long session. Because most of the catalogue starts below the 96.00% average, a reduced setting bites harder here than it would on a studio whose headline figures begin at 96.50% or above. The two titles above the 96.00% mark — Fishin’ Bear and Wolf Saga — are the value outliers, but even those can be deployed lower. Book of Sun: Choice can read 97.74%, but only through its bonus buy, which UK casinos do not offer; on a standard UK setting it sits at about 95.76%, in line with the rest of the catalogue.
How to check your casino’s RTP version: open the game, then its menu or information screen, find the paytable or game-rules section, and read the stated RTP. If a game does not display its RTP at all, that absence is itself a reason to play elsewhere.
3 Oaks Gaming Signature Mechanics Explained
Hold & Win (Ultra Hold & Win)
Used in: Sun of Egypt 3, Caishen Wealth Hold and Win, 15 Dragon Pearls: Hold and Win, Scarab Boost, Wolf Saga. Landing six or more special cash or coin symbols triggers a respin round in which those symbols lock in place. Each time a new one lands, the respin count resets to three, and the cash symbols carry values and fixed jackpot tiers; filling every reel position awards the top jackpot. The effect on the maths is the key thing to understand: it concentrates most of a game’s return in this bonus, which lifts volatility and produces long runs of small or no wins between triggers. This is the structure behind the bulk of the catalogue.
Fixed and Must Drop Jackpots and Lucky Drops
Used in: Caishen Wealth Hold and Win, Sun of Egypt 4, Fishin’ Bear, Must Drop Jackpot 777 Fruity Classic. Many titles add fixed jackpot tiers — typically Mini, Minor, Major and Grand — won by collecting symbols in the Hold & Win round, while the Must Drop and Lucky Drops layer adds network jackpots that pay out by a set time or amount. Because part of the theoretical return is routed into these pools, base-game returns can feel thinner between jackpot hits, which is the trade for the chance at a larger fixed prize.
Feature and Bonus Buy
Used in: Book of Sun: Choice, Lucky Penny. In non-UK markets, some 3 Oaks titles let a player pay a multiple of the stake to trigger the free-spins or bonus round directly rather than waiting for it in normal play. This does not change the underlying maths; it front-loads the bonus and the variance attached to it. The UK caveat is firm: feature buys are not offered at UKGC-licensed operators under the Commission’s RTS 14A responsible-product-design requirements, so UK players reach these rounds through normal play.
Megaways (via Big Time Gaming)
Used in: selected 3 Oaks Megaways titles. Under a 2022 agreement with Big Time Gaming, some 3 Oaks slots use the Megaways engine, in which the number of symbols per reel changes each spin to produce up to 100,000-plus ways to win. It adds a high-variance, many-ways option alongside the core Hold & Win catalogue, and is a smaller strand of the portfolio rather than its centre.
3 Oaks Gaming vs Playson
The most useful comparison for 3 Oaks is Playson. Both are mid-sized, UKGC-licensed studios whose signature mechanic is Hold & Win, they sit at a comparable catalogue scale, and they share a similar below-average RTP posture — which makes Playson a closer like-for-like than a much larger supplier would be. Playson is the older of the two, founded in 2012 and based in Malta.
| Metric | 3 Oaks Gaming | Playson |
| Total UK Slots | 60+ (some lists 80-100+) | Around 100 (some cite up to ~200) |
| Average RTP (top titles) | ~95.50% (most below 96.00%) | ~95.50% to 96.50% (most below 96.00%) |
| Volatility Range | Medium to Very High | Medium to High |
| Bonus Buy Available | Many non-UK titles; not at UKGC | Not clearly published |
| Signature Mechanic | Hold & Win | Hold & Win |
| Typical Max Win | 750x to 10,000x | Mostly four-figure; up to ~20,000x |
| New Releases per Month | 1-2 | Not clearly published |
| Best For | Egyptian and jackpot Hold & Win themes | Hold & Win with tiered jackpots and network promotions |
The two studios are close enough that the differences are matters of emphasis. On RTP they are broadly level and both sit below the 96.00% average, so neither holds a clear edge there; the version your casino runs matters more than the studio name. On ceilings Playson reaches a little higher, with several titles at 20,000x against the 10,000x that tops most of the 3 Oaks core range, so a player chasing a larger top prize has slightly more to aim at with Playson. Both lean on tiered fixed jackpots and network promotions rather than huge multiplier ladders.
By player profile, the choice comes down to themes and feel. A player drawn to the Sun of Egypt series and 3 Oaks’ particular Hold & Win jackpot games has plenty to work with here; a player who wants a deeper bench of Hold & Win titles and the occasional higher ceiling may prefer Playson. Because both rely heavily on operator distribution, availability at any given UK casino comes down to that site’s content deals more than to either studio’s catalogue size.
What to Check Before Playing 3 Oaks Gaming Slots
RTP Versions
This is the single most important check for this studio, because the catalogue starts below the market average. The figures in this review are the highest published settings; many UK casinos run reduced versions. Open the game, find the paytable or information screen, and read the stated RTP before you play. If a game does not display its RTP, treat that as a reason to choose a different casino or title. Players researching 3 Oaks Gaming slots online should always confirm the live figure rather than relying on a quoted one.
Bankroll Planning
The Hold & Win structure means most of the return arrives in the bonus, so plan for long gaps. On a high-variance title, a £50 budget at £0.50 a spin gives 100 base spins, and the bonus may not land inside that — size the stake so a session survives the dry runs rather than betting up in the hope of forcing a feature. For steadier play, the medium-volatility titles such as 777 Gems Respin spread the budget further. Any cash figures here are illustrative examples within the GB online-slots stake-cap context, not staking advice.
Bonus Buy Restrictions
Many 3 Oaks titles offer a feature or bonus buy outside the UK, but these are not available at UKGC-licensed operators under the Commission’s RTS 14A responsible-product-design rules. The Commission warned operators about feature buy-ins on 17 January 2020, and the operators it contacted removed the feature, per the Commission’s published update by 17 May 2021. At UK casinos you reach the free-spins and bonus rounds through normal play. Buying direct entry to a bonus is not a route to a better result; it only changes when the variance arrives.
Responsible Gambling
3 Oaks Gaming’s profile has clear player-facing consequences. Most of its titles run below the 96.00% RTP average at their best setting and lean towards high volatility, with the return concentrated in the Hold & Win bonus. In practice that means extended losing runs are a normal part of how these games behave, not a sign that a win is owed or that a jackpot is approaching. Each spin is independent, and no amount of waiting makes a feature more likely to land. Set a budget before you play, treat it as the cost of entertainment, and stop when it is gone rather than chasing it.
If gambling stops feeling like entertainment, free and confidential help is available. You can self-exclude from UKGC-licensed operators through GamStop, and find support and information through BeGambleAware and GamCare. Blocking software such as Gamban can restrict access to gambling sites across your devices. GamStop covers operators licensed by the Gambling Commission.
Frequently Asked Questions
Yes. Its parent company, Green Rock Limited, holds an Active UKGC Gambling Software licence (account 63055), in force from 9 February 2024, and the Commission approved the studio's broad game portfolio in early 2025. 3 Oaks games therefore appear at UK casinos licensed by the Gambling Commission. It is a relatively recent entrant to the regulated UK market, so its track record there is shorter than that of long-established suppliers.
Hold & Win is the studio's signature mechanic. Landing six or more cash or coin symbols starts a respin round where those symbols lock in place and the respin count resets to three each time a new one lands. The symbols carry cash values and fixed jackpot tiers, and filling every position awards the top jackpot. It concentrates a game's return in this bonus, which raises volatility and the gaps between wins.
Most 3 Oaks titles sit around 95.50% at their highest setting, a little below the 96.00% market average. A few sit higher on their standard setting, such as Fishin' Bear at 96.50% and Wolf Saga at 96.06%. Book of Sun: Choice can reach 97.74% only through its bonus buy, which UK casinos do not offer. Always check the paytable in the specific game at your casino, since operators can run reduced versions.
The Sun of Egypt series is the studio's best-known work, and Sun of Egypt 3 is the title most associated with 3 Oaks. It plays on a 5x3 grid with 25 paylines, a checked RTP of 95.61% and high volatility, and its Ultra Hold & Win bonus can pay up to 10,000x the stake through the Royal jackpot. The wider series, including Sun of Egypt 4, follows the same template.
No. Several 3 Oaks titles offer a feature or bonus buy outside the UK, but feature buys are not available at UKGC-licensed operators under the Commission's RTS 14A rules, following its 17 January 2020 warning to operators. At UK casinos you trigger the free-spins and bonus rounds through normal play. Buying entry would only change when the variance arrives, not improve the expected outcome.
Yes. 3 Oaks Gaming grew out of Booongo, a studio founded in 2015 that began in Austria and later operated from the Isle of Man. The business reorganised around 2021, with 3 Oaks Gaming spun off to pursue licences in regulated markets while a sister brand continued elsewhere. The two share much of the same game library, so titles built under the Booongo name still appear under the 3 Oaks brand.
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