20 Best Greentube Slots in the UK (2026)

As the online gaming division of Austrian manufacturer Novomatic, Greentube has entertained players for years with a diverse range of classic and tailored content.

Many of Greentube’s best-known slots started as land-based Novomatic machines, such as Book of Ra and Sizzling Hot, before being released online.

This guide places the spotlight on some of the best Greentube slots to play in 2026. We’ve discussed the finest titles produced by this developer, exploring core game mechanics and bonus features, and we’ve reserved space to explain what to look for before tackling Greentube slots.

About Greentube

Greentube was founded in Vienna in 1998 and has been part of the Novomatic group since 2010. Its online division brings many of Novomatic’s land-based classics to digital casinos, alongside newer titles built for online play. Greentube is licensed in the UK by the Gambling Commission, and its games are built in HTML5, so they run on desktop, tablet and mobile browsers.

 

Best Greentube Slots Available in 2026

We’ve flicked through the catalogue and picked out 20 top Greentube slots worth giving a spin. To kick things off, we’ve presented a table illustrating the position of each slot and the category of game style they fall under:

Book of Ra Slots

The Book of Ra is the best-known and most popular collection of Greentube slots produced. This series is built around an explorer theme, and here, the book symbol acts as a Wild and Scatter, with an expanding symbol in free spins. Let’s take a look at them below.

 

Book of Ra Classic

Covering the well-trodden path of Ancient Egypt, Book of Ra Classic is an explorer-style game, featuring 5 reels and 9 paylines.

The Book symbol in this game serves a dual purpose, acting as a Wild and a Scatter. As a Wild, it substitutes for all other symbols to complete winning combinations, while as a Scatter, it triggers the Free Spins feature when 3 or more pop up on the reels.

The Free Spins round includes an Expanding symbol, which can help boost win potential.

Some versions include a Gamble feature, so check the game rules at 7bet to see whether it is available. There is no Buy Bonus feature available to grant players instant access to bonus rounds.

One of the most influential games, Book of Ra Classic, which was launched in 2005, shaped Novomatic’s ‘Book of’ range, and continues to be held in high esteem.

 

Book of Ra Deluxe

An update on the classic with more polished graphics, Book of Ra Deluxe features 5 reels and 10 paylines.

Apart from an increase in paylines and improved animations, the core mechanics of Book of Ra Deluxe and Book of Ra are largely the same. The Free Spins plays are identical, as you need to land 3 Scatters to trigger the bonus round, and the bonus round can be retriggered.

Again, the Book of Ra symbol acts as the Wild and Scatter, and it also has a Gamble Feature. Meanwhile, the win cap is set at 10,035x your total bet, but Book of Ra Deluxe has a higher RTP.

 

Book of Ra Deluxe 6

Book of Ra Deluxe 6 almost mirrors its 5-reel counterpart, except the game comes with 6 reels, so players can form 6-of-a-kind combos from winning spins.

The sixth reel is also known as Extra Bet, and this title has been revamped from Book of Ra Deluxe to plunge players deeper into the mysterious pyramids.

The game features the same symbols and Novomatic soundtrack as Book of Ra Deluxe, and the sixth reel allows 6-of-a-kind combinations, which have their own higher paytable values. In the Book of Ra Deluxe 6, a 6-of-a-kind combo offers a return that is triple that of the 5-reel version.

7bet also stocks Book of Ra Deluxe 10, which is available for players to check out.

 

Book of Ra Magic

Giving the Book of Ra collection a fresh twist, Book of Ra Magic has the same formula as Book of Ra Deluxe, but the one crucial difference is the expanding symbols.

In Book of Ra Magic, every retrigger of the bonus round adds another special expanding symbol to the round, stacking up to nine running simultaneously.

A nine-symbol maximum, therefore, can turn almost every reel fill into a multi-line payout. However, Book of Ra Magic has a lower win cap (5,000x) your total bet compared to Book of Ra Deluxe.

Those players who wish to delve deeper can also try out Cash Connection – Golden Book of Ra at 7bet.

 

Classic Fruit Greentube Slots

The fruit-themed Greentube slots are classics, and innately simple to play in terms of paylines and grid structure. Also, there are relatively few, if any, bonus rounds to contend with, so let’s run through some of the most popular Greentube slots in this category.

 

Sizzling Hot Deluxe

Sizzling Hot Deluxe embraces simplicity and plays out on a 5×3 reel layout. Wins are formed by landing 3 or more matching symbols on adjacent reels from left to right, and there are 5 paylines available.

There is a Scatter symbol, but there aren’t really any significant bonus features. The only feature really of note is the Gamble feature, where players are given a choice of red or black. A correct guess doubles the win; an incorrect guess loses it.

Sizzling Hot Deluxe is a stripped-back version, as there are no free spins.

 

Sizzling Hot 6 Extra Gold

Sizzling Hot 6 Extra Gold turns up the heat and offers an additional reel compared to its predecessor. This game hasn’t lost its old-school charm, but with the Extra Bet feature, this can unlock a sixth reel and bolster potential payouts.

Other than the extra reel, this game, like Sizzling Hot Deluxe, contains Scatters, represented by the Star. There is also a Gamble Feature where players can risk their winnings in a simple card game.

7bet has a few other Sizzling Hot versions to play, including Sizzling Hot Deluxe 10 Win Ways and Twin Spinner Sizzling Hot Deluxe.

 

Ultra Hot Deluxe

This 3×3 reel classic fruit game has been turned into a modern favourite where the sharp colours of the fruit sit well alongside the Bar symbols and the coveted double 7s.

Accompanying this slot is a multiplier, where players can double their winnings. In addition, there is a Gamble feature where players can risk their winnings or bank their credits.

Optimised for mobile devices, this game has medium volatility, meaning wins are steadier.

 

Mega Joker

Not to be confused with the NetEnt game that shares the same name, Novomatic’s Mega Joker incorporates a joker and fruit theme. The action takes place on a 5×4 gaming matrix, replete with 40 paylines.

The bulk of the play takes place during the base game, as there are no free spins available. Rather, Mega Joker has a Scatter symbol, which is the top-value symbol, while Wilds can appear stacked.

Meanwhile, once a win appears on the reels, there is a Gamble feature, so players can double wins, but it fizzles out after 5 successful gambles.

 

Reel King Slots

The Reel King range of Greentube slots is based on an established UK fruit-machine brand, where there is a “reels within reels” bonus feature. Despite not having a groundbreaking design, Reel King made its name in pubs and amusement arcades before finding its way online.

Here are a couple of Greentube titles in the Reel King range which are worth checking out.

 

Reel King

This fruit-machine themed game contains 5 reels, 3 rows, and 20 fixed paylines.

The Reel King feature is the predominant feature of this game, as it isn’t triggered like most other slots where you need 3 Scatters to activate it. Instead, a cartoon King character can appear on up to 5 reels. When he appears, a mini slot machine with its own set of reels spins inside the main reels and can award extra wins.

This feature continues until players don’t land any further winning combos. Meanwhile, the maximum win is 500x your total stake.

 

Reel King Potty

Reel King Potty takes things up a notch by throwing progressive jackpots into the equation, and this happens on fully red reels. Through the Reel King Potty Feature, players can tap into a new set of reels, which will determine whether they win the Bronze, Silver, Gold, or King jackpot.

The other feature is Reel King, which is triggered when all 5 reels turn yellow, and the game also includes free spins.

 

Lucky Lady’s Charm Slots

Lucky Lady’s Charm slots tap into a fortune-teller theme, utilising a crystal ball scatter. These are inherently intriguing Greentube slots, boasting plenty of aesthetic beauty, so let’s dive into this segment of the guide.

 

Lucky Lady’s Charm Deluxe

Leaning heavily into the fortune-teller theme, Lucky Lady’s Charm Deluxe contains 5 reels, 3 rows and 10 fixed paylines.

This game revolves around the Free Spins feature. Landing 3 or more Scatters activates the feature, and players can trigger 15 free spins with a 3x multiplier.

Landing 3 or more Scatters in the bonus round can retrigger the feature with 15 additional spins. Importantly, players can retrigger infinitely for unlimited extra free spins.

 

Lucky Lady’s Charm Deluxe 10

Providing a more sophisticated appearance, Lucky Lady’s Charm Deluxe 10 includes two reels that can be played simultaneously — a 5×6 grid on the right and a 5×3 grid on the left.

Although this game has no maximum multiplier, there are more betways attached to Lucky Lady’s Charm Deluxe 10, which changes how wins are formed compared with its predecessor. Lucky Lady’s Charm Deluxe 6 and Charming Lady’s Boom are also available at 7bet.

 

Novomatic Classic Slots

The following Novomatic slots share the classic format of an expanding wild or scatter and free spins as discussed below.

 

Lord of the Ocean

Using an underwater mythology theme to encompass the atmosphere, Lord of the Ocean places a Poseidon-style character at the heart of the game.

Played on a 5-reel, 3-row grid along with 10 fixed paylines, the expanding symbol is a key ingredient of this game. Players who land 3 or more Scatters can trigger the bonus round, and they will be awarded 10 free spins as well as a Special Expanding symbol.

Here, a symbol is chosen at random at the start of the bonus round and can expand to cover 3 reels. Lord of the Ocean Magic is also available for players to try out at 7bet should they like Lord of the Ocean.

 

Dolphin’s Pearl Deluxe

Also incorporating an underwater adventure, Dolphin’s Pearl Deluxe is propelled by Wild multipliers.

Yes, any winning combos featuring the Dolphin symbol can trigger the Wild Multiplier feature. Landing 5 Wilds on a payline can result in a payout worth 900x your stake.

Meanwhile, the Free Spins round sees players who land 3 or more Scatters awarded 15 free spins and boosted by a 3x multiplier on wins accrued. The maximum win is listed in the game’s information panel.

 

Columbus Deluxe

Based on the explorer and navigator Christopher Columbus, who reached the Americas in 1492, Columbus Deluxe covers the action on a 5×3 grid with 10 flexible paylines.

The main feature is the Free Spins. Landing the Columbus Ship Scatter sparks the bonus spins round, with players starting with 10 free spins. The 3 ships can transform into Wilds, substituting for regular symbols to complete wins.

Also, players gaining Scatters again on reels 1, 3, and 5 will pick up an additional 10 free spins. Although there is also a Gamble feature, this game targets retro players who prefer simple game mechanics.

 

Greentube Link and Jackpot Slots

Cash Connection and Diamond Link are two of Greentube’s famed linked bonus formats, built around money symbols that lock in place during respins.

There will be a progressive jackpot system for players to tap into, and we’ve discussed this in the games below.

 

Cash Connection – Charming Lady

Centred around a fortune teller theme, the charming lady takes the popular Lucky Lady’s Charm to another level in Cash Connection – Charming Lady.

The beauty of the game lies in its simplicity, as it consists of a 5-reel gaming matrix with 10 fixed paylines. There are also four jackpot levels: Mini, Minor, Major and Grand.

Moreover, collecting at least 6 Sphere symbols on the reels triggers the Lock and Spin feature, where a journey begins to win either the Mini, Minor, Major, or Grand jackpot. Other Cash Connection games available at 7bet include Dolphin’s Pearl, Golden Book of Ra, Sizzling Hot, and Golden Voodoo Magic.

 

Diamond Link: Mighty Buffalo

Throwing itself into the wildlife theme, players are invited to tame animals in Diamond Link: Mighty Buffalo. One of the top Greentube slots in the Diamond Link series, this game consists of 5 reels and 25 fixed paylines.

The aim is to trigger the Diamond Link feature, which gives players the chance to unlock one of four jackpot tiers, including the Grand Jackpot.

Apart from normal wins and jackpots, this Diamond Link game also offers Wild spins, Sticky Spins, or Colossal Spins. Winnings from these are added to your total Diamond Link feature win. Among the other Diamond Link games available at 7bet are Almighty Wolf, Mighty Cleopatra, Mighty Sevens, and more.

 

Other Popular Greentube Slots

Greentube slots are quite diverse in nature, and the other popular games, as you will see, feature pirate and fishing themes that are waiting to be explored.

 

Captain Venture

This adventure-themed title sees pirates hunt for treasure chests. Comprising 5 reels and 3 rows, and 10 fixed paylines, Captain Venture revolves around Free Spins with multipliers.

Landing 3 or more Steering Wheel Scatters triggers the Free Spins Feature with up to 20 free spins. In the Free Spins round, a 4x multiplier applies to all wins.

And in this round, Captain Venture doubles every winning line that he’s part of. That means an 8x multiplier is applied when a Wild is involved. Here, players can win unlimited spins.

Although there is a double-or-nothing Gamble Feature too, the maximum win is listed in the game’s information panel.

 

Wish Upon a Star

Wish Upon a Star traverses the themes of fairy tales and Christmas, and this game is backed up by some solid bonus features too.

The Presents Feature, for example, allows players to pick a present from 3 when they are stacked on the reels. Here, players can win 20, 30, or 50x their stake and gain access to the Free Spins round.

Access to the Free Spins round is granted when players land 3 or more Scatters. Players get 10 free spins to begin with, and all wins are doubled. Landing 3 more Scatters during the round offers up to 10 more respins.

There are also Jackpot Respins. Players who land at least 6 star symbols activate the respins feature. Each star has its own cash value and remains sticky. There are 3 respins to start with, and each new star landed resets the respin counter.

 

Fortune Fishing

A 5-reel, 10-payline fishing-themed slot, Fortune Fishing isn’t just another one of those ordinary, run-of-the-mill Greentube slots.

Rather, it is underlined by some standout features. For example, there is a bonus zone. Landing 3 or more Ship Scatters can unlock the Free Spins round with 20 free spins.

Meanwhile, whenever the Wild symbol appears, players can pocket up 50x the bet. The more Wilds reeled in, the greater the payout.

Oh, and the rare Icelandic bird symbol is like the golden goose. Lining up 5 across a payline rewards players with a win worth up to 2,500x their bet.

 

How to Choose the Best Greentube Slot

No Greentube slots are the same. They are unique and they all bring something different to the party. Which game should you pick?

This segment of the guide explores some of the key criteria to assess that should give food for thought when it comes to settling on the best Greentube slots to engage with.

 

Check the Theme

Greentube slots encompass a wide range of motifs to entice players, and that includes everything from Ancient Egypt and classic fruit through to fortune teller and wildlife.

Players should think carefully about the theme and go for something that serves up substance and style in equal measure. Often, it can be too easy to be swayed by shiny graphics, but a strong theme can resonate with players.

 

Review the Game Mechanics

The games available at Greentube offer different gaming mechanics. Some may have a more rigid structure with fixed paylines, while others may be more elaborate in free spins, offering expanding symbols.

There will also be classic fruit-themed varieties with no discernible free spins rounds, and some might have link-styles respins or jackpot tiers. Whatever it is you are after, make sure you understand how the core features work, as they will ultimately define your playing experience.

 

Check the RTP and Maximum Win

The max win refers to a multiple of your stake, and some Greentube slots are more lucrative in that regard compared to others. RTP levels, meanwhile, can differ by operator and what is provided by the gaming developer.

Remember, RTP provides a theoretical figure on potential returns made from bets in the long term. If you are unsure about the RTP and max win amount, don’t forget to check the information panel at 7bet to see if it suits you before playing for real money.

 

Understand Volatility

Volatility is vital when choosing Greentube slots to play. Some will be highly volatile, such as “Book of” titles, and therefore they will generally provide less frequent returns with a wider range of possible outcomes.

Some, on the other hand, will have a medium-volatility rating, offering more evenly balanced wins. Each title should be checked individually and judged on its own merit, as volatility levels cater to players of all abilities. Running a game through the free-to-play demo mode can offer some useful insights.

 

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