Online Slots

Our online slots library is packed offering our players plenty of choices. There are many different themes, including the extremely popular Irish and Egyptian themes. You will be able to find some of the most popular online slot machines such as Rainbow Riches, Big Wheel slot and Rainbow Jackpots. You will also be able to find slots from some of the biggest gaming providers such as Red Roo from Novomatic and Vikings Go Berzerk from Yggdrasil. There are a number of fantastic gaming providers around and thanks to our great relationship with them, all of the best slots are available right here at Bet UK.


Top Online Slots

When it comes to UK casino games that players just can’t seem to get enough of, the Bet UK online slot machine collection boasts a wide collection of them. For example, the Book of Dead slot is a Play N Go classic, that has a broad appeal due to its ability to cater to the preferences of traditional land-based slot machine players as well as those that are more comfortable in an online setting. The valuable Free Spins bonus and potential wins of 5,000x your stake on every spin may have something to do with the popularity of this slot game too. If you’d like to find out more, read our Book of Dead slot review.

We also boast several instalments of the IGT Cleopatra slot series, with follow up titles such as Cleopatra Gold and Cleopatra Diamond Spins available to play whether you’re a mobile slot player or you prefer to use a desktop device for your gameplay. Beyond that, NetEnt are the developers behind one of the most sought-after slots that the world of online casino has ever seen.

There are some games that feel like they'll never be knocked off the most popular list, but there are often new online casino slots that feel as if they can challenge even the very best, as we've seen with the innovative Starburst slot. There are even some that target a particular niche, such as certain calendar events. While slots like Fun Size Fireworks and Lucky Halloween can be played all year round, they feel that extra bit relevant at certain times of the year.

What Are The Top Performing Slot Games?

What makes an online slot game so playable? Well, we have a variety of guides that explain exactly that. We also have definitive lists of the most popular games in a variety of categories, such as the best Red Tiger slots like Rainbow Jackpots, or the top NetEnt slots like Starburst. The latter even has a section dedicated to exploring that title in full, so if you’ve heard of it but never quite gotten around to playing it, you may be interested in our Starburst slot review. We also have several more of the biggest games in the online casino world, from Nolimit City’s Deadwood slot, to the genre-defining Razor Shark from Push Gaming, and we have plenty more titles in the offing to suit your preferences. Feel free to browse our range of online slots, and who knows, maybe you’ll discover a new favourite.

Features of Online Slot Machines

Bet UK online slot machines have a number of excellent features to set them apart from each other. Alongside different themes and designs of each game, the features available can help differentiate each slot. Features include tumbling reels, added bonus games where free spins or multipliers may be available, stacked wilds, and much more. There are also many games with a huge number of paylines, like online Megaways slots, as well as games that incorporate that Jackpot King feature. This means big win potential for our players.

UK Online Slots

Our players in the UK enjoy online slots in all different shapes and sizes. Some may prefer to stick to the most popular slots, and therefore could decide to go for the phenomenon that is Genie Jackpots. Alternatively, a player may judge a game on its bonus features. If you like tumbling reels then Gonzo's Quest could be on the agenda. If simple gameplay and huge winning potential are more your things then Blueprint Gaming's Fishin' Frenzy could well be the online slot for you.

Best Online Slots UK

If you've been looking for the best online slots and casino games in the industry, then look no further, as our guides will help you to source the ones that suit your particular needs. What exactly constitutes the "best" is entirely up to our players, but from feedback we've gathered that themes, bonus features, and the winning potential on offer play a huge part. Whether that be Irish slots, games with a variety of Free Spins bonus rounds, or progressive slots that have huge jackpots available, Bet UK has you covered. Consult our range of guides below to find the best online slot machines that fit your requirements, as well as to learn more about how they work.

How to Play Online Slots

Probably the most important part of online slots is knowing how to actually play them. There are a few things that are largely similar between slots, such as layout and additional functions such as autoplay, but they often vary in terms of their features. Sometimes it's simpler to go back to basics to make sure you've got all the information you require, particularly if you're making the leap from pub fruit machines, one-armed bandits, or the best live casino games to online slots, and hopefully some of our guides provide you with a bit of an education if you're new to the best online casino.

Mobile Slots at Bet UK

With the ever-changing nature of the gaming industry and the internet in general, it is important that all of our major slots are available via a mobile, tablet device or desktop device. Mobile slots can be accessed from wherever you are in the UK, providing that you are over the age of 18 and have a stable internet connection. Mobile technology is growing at an extremely rapid rate, meaning that players can access online casino slots while on the go.

New Online Slot Machines at Bet UK

New online slots are added to Bet UK each and every month, so make sure to keep an eye out for those recent releases, which will usually show up on our ‘Featured’ grid with a blue banner marking them out from the rest of our online slot machines. Some of the latest slots include the likes of 6 Wild Sharks - one of the most dynamic casino slots ever to arrive at Bet UK, where the Wild Choice Free Spins allow you to play the feature in the way that suits you best. Elsewhere, you can claim front row tickets to the Golden Ticket 2 slot game, where various elements from the circus combine to offer huge wins of up to 5,000x your stake on every spin of the reels.

Online Slot Sequels at Bet UK

If you’re a fan of a particular online slot game that we have at Bet UK, then it may be worth exploring our collection even further to see if there’s a sequel to that title or a related spin-off. For example, admirers of the Reactoonz slot from Play N Go may be delighted to learn of a sequel, Reactoonz 2, which offers even more winning potential than the first instalment. You may also be delighted to learn of further sequels to the best online slots available, such as Gonzo’s Quest Megaways and the Money Train 2 slot from Microgaming.

When it comes to spin-offs of existing slots, then Play N Go are once again the game developer to keep an eye on, as they continue to send their resident explorer, Rich Wilde, on a series of adventures. You may know him from Book of Dead, but you can also find Rich traversing the reels in his efforts to conquer the Tome of Madness slot and the Shield of Athena slot.

Finally, one of the most treasured online slot franchises in our collection has to be Rainbow Riches. Many different sequels have followed, including Rainbow Riches Megaways and Slingo Rainbow Riches, as Barcrest and SG Interactive have adapted with new game mechanics and features. To keep on top of the growing list of titles in this series, why not bookmark our Rainbow Riches slot guide?

Slot Betting

If you’re looking to make a slot bet, you can do worse than exploring our wide range of online slot machines, which cover various elements of pop culture. Rick and Morty Megaways is a great example of Blueprint Gaming titles that are inspired by TV shows, while IGT’s Ghostbusters Plus is based around a hugely successful film. Elsewhere, the Worms Reloaded slot takes its core elements from the world of video games. If you’re looking to progress from slot betting, you might wish to take a look at our wide range of Slingo games, which add in elements of bingo too.

7 Slot Facts

Slot machines have been around for decades, and they remain the most popular type of game in casinos around the world. They’ve survived technological advances, adapting to become online slots, and here are some interesting facts about them that you may not have known.

1. Slots Are Completely Random

Slots use pseudo-random number generators or PRNGs, so there is no cyclical system in place. Some players assume that there is more chance of winning if a casino slot has not paid out in a while, but there is no moment when the jackpot gets closer.

2. Popular Since 1891

The first slot was invented in 1891 in New York by Sittman and Pitt. It was very different to modern machines, but it was the first recognisable slot. It was based around the live casino staple of Poker, with five drums holding 50 card faces. It was an instant hit, and it became popular all over New York.

3. A Game of Many Names

Slot machines or video slots are known by many different names around the world. For example, they used to be known as 'fruit machines' in Britain and they sometimes still are. They are also called 'puggies' in some places and also known as 'Poker machines'. The classic slang name for land-based casino machines is 'one-armed bandits' because of the lever on the side that spins the reels and how they can leave the player out of pocket.

4. The Biggest Online Slot Win

There have been some big wins on online slot games over the years, but the biggest came in October 2015 when Jon Heywood from Cheshire, England won £13.2 million on the Mega Moolah progressive slot. Even more incredibly, he won with a stake of just 25 pence.

5. First Electric & Video Slots

Slots were mechanical until the second half of the 20th century, when the first electromechanical slot arrived in 1963. Its popularity led to the development of more electronic games. Video slots came along soon after. The first was created in 1976 in California by Fortune Coin Co., and it was first offered to players in the Las Vegas Hilton Hotel.

6. The Way Slots Work Hasn't Changed

Mechanical slots look completely different to modern video slots, but they actually work on the same premise. They both use a random generator, but one is mechanical and one uses a computer.

7. Slots Are Big Business

Of all the online casino games in the world, slots make up about half of them. Granted, there are many different slot games, but as a category of casino games, slots are by far the largest.

Online Slots FAQs

What is a Slot Machine?

A slot is a gambling machine that consists of three or more reels that spin when a corresponding button is pushed. A staple of land-based casinos, slots have developed in line with technological advances, and an online slot is a game that can be played over the internet, hosted by an online casino. Online slot machines have become very popular over the last few years, with online casinos such as Bet UK having collections that incorporate hundreds of the most popular slot games.

How Do I Play Online Slots?

We now know that online slots play just like physical fruit machines. Here are some simple steps to follow for those new to playing online:

  1. Deposit the money you're willing to play with and set a budget.

  2. Set the total amount you'd like to play with per spin. This can vary from game to game.

  3. Decide whether you'll play with autospins or spin manually. To spin automatically just set your total number of spins and limits.

  4. Hit play to trigger your automatic spins or hit play manually as you choose.

  5. Watch as the reels spin in hope of aligning prize-winning symbols.

Are All Slots the Same?

The short answer to this is no, as bonus features, structure, and theme can all play a huge part in determining if a slot is right for you. Recent years have also seen changes in the online casino game industry, with many slot game providers turning to Big Time Gaming's patented innovation.

What Are Paylines?

Paylines are your ways of winning. The aim is to align your symbols in winning combinations. In a classic slot, this may be lucky 7's aligned horizontally. In online slots, symbols vary as well as paylines working in multiple directions. As you align different symbols the prizes can be different. Paylines featuring high paying symbols payout more. More paylines provide more opportunities to win. A great example is the increasingly popular 'Megaways' feature, which provides 117,649 different ways to win.

If Megaways slots have grabbed your attention be sure to check out, Deal or No Deal Megaways, or Aztec Gold Megaways.

What Are Reels?

Reels are the vertical sections of a slot machine that create the traditional spinning motion and display symbols. Classic slots use levers or buttons to set the reels in motion, while online slots use virtual versions of these. There are now all sorts of reel functions, including cascading reels, expanding reels and wild reels, all of which can create valuable winning opportunities as you play slots online.

What Does RTP Mean?

RTP stands for 'Return to Player’. It's a term used to describe the percentage of all wagered money that an online slot will pay back over time. The higher the RTP, the more chance players have of seeing wins.

Are Online Slots Really Random?

The short answer is yes. Online casino slots use a random number generator often, which is often shortened to RNG. They are totally random. They don't get hot, or cold, or become due. Every spin is calculated randomly meaning any player could win on any spin.

Is There a Way to Tell When an Online Slot Will Pay Big?

No, as mentioned in the previous section, online slots are based on computerised algorithms known as RNG to ensure each spin is totally random.

Are Online Slots Rigged?

One of the biggest worries of casino players is whether or not the game they are playing is rigged. However, for peace of mind, you can be certain that slots and other casino games at Bet UK are not rigged. Any online slot that was rigged would be instantly shut down. Gaming jurisdictions are in place in the UK to ensure that online slot machines are fair and secure, providing a safe gaming environment for their players.

Is There a Best Time of The Day to Play Slots Online?

With online slots being totally random and based on a random number generated (RNG) algorithm there's no way for there to be a best time to play. It's a misconception that is often discussed between online slot players.

Is There Any Truth Behind The 'Beginners Luck Theory'?

It's a known fact that winning for the first time is often more memorable. A first-time win will leave players with a clouded judgement. As we now know, slots are based on RNG, meaning the odds are the same for every player at all times.

How to Win at Online Slots

First, and most importantly, find an online slot that you like. It may take trying out a few different online slot machines at first but you'll soon find a slot to suit your needs. That could be by varying the theme, available bonus rounds, or something else.

Online slots, as with many games in the casino, are based on luck. There is no definitive way to win every single time or always come out on top. However, there are some methods you can use to give yourself the best chance.

Set a Budget

By setting a budget, you know your limits. It can be easy to fall susceptible to the trap of a losing streak and continue trying to claw your way back. Online casino slots are random and based on luck, meaning each player stands an equal chance of winning as well as losing. Never risk anything you can't afford to lose.

Read The Rules of Your Online Slot of Choice

Each game will come with its own set of rules. To find out exactly how your online slot of choice works, refer to the in-game rules. There you will find explanations of bonuses, paylines and depositing amounts.

Check Which Online Slots Have The Best Odds

Simple slots often have better odds of winning but offer smaller prizes. Slots with flashy bonus features and complex rules usually offer worse odds but with huge prize potential.

Explore the Bonus Features on Offer

As online slots become more sophisticated, so do their bonus features. Bonus features provide additional ways on top of matching symbols on the reels to win. With a gigantic choice of slot games to choose from, players are continually looking for more engaging and complex bonus round features.

Bonus rounds will usually be awarded by matching certain symbols on the reels. They'll run for a short time before returning you to the main game, however, they offer opportunities for increased winning. Online casino slots are slowly but surely becoming more like video games with a huge influx in features, storylines and gameplay.

Choosing what to play can be daunting so we have broken down what each bonus feature means to help you with your decision.

What is the Free Spins Feature?

The free spins feature is exactly what you'd think it is. Matching a certain combination will give you a free spins bonus offering the opportunity to boost your winnings at no cost. It's a simple but lucrative bonus round. The number of free spins on offer vary per game. A hugely popular online slot with a free spins feature is Rainbow Riches Free Spins.

What Are Multiplier Symbols?

Another self-explanatory online feature is multiplier symbols. Landing a multiplier will increase your winnings by the given amount which can be as little as 2x but range into the thousands. Book of Dead offers players up to 5000x the winnings!

What Are Scatter Symbols?

Scatter symbols are a friend of the online slot player. As you spin the reels you're normally on the lookout for matching symbols. Scatter symbols help with this as they can appear in any position on the reel to reward you with a win or give access to a bonus round. Scatter symbols will generally be one of the higher paying symbols and match the overall theme. Wish Upon a Jackpot is an online slot packed with visuals, bonus rounds and of course, scatters.

What Are Wild Symbols?

Wild symbols can become a substitute for any other symbol to complete a winning line. As an example, if you land 3 matching symbols and 1 wild you'll get a payout equal to matching 4 symbols. There's a variety of wilds such as shifting wilds, sticky wilds, expanding wilds and stacked wilds. The Wild Hatter is one of the best slots if you're after wild features.

What Are Sticky Wilds?

Wilds are a common feature found in many of the biggest titles. Sticky Wilds take Wilds one step further by putting a symbol on the reel that stays in place for additional spins. In turn, there is more opportunity to win on the reels.

What Are Expanding Wilds?

If wilds are a player’s friend, expanding wilds are a best friend. An expanding wild can stretch across the whole reel turning everything into a wild offering huge winning potential. Starburst is a hugely popular slot that includes the expanding wilds feature.

What Are Shifting Wilds?

Shifting wilds work just like normal wilds, however, they move in relation to the spinning reels. With each spin, the wild will move 1 spot until it eventually leaves the reels.

What Are Stacked Wilds?

Stacked wilds are a wild symbol that covers the entire reel when they drop. They'll usually appear in bands of two, three, four, or five symbols. However, some online slots have the possibility of getting stacked wilds on every reel.

What Are Transferring Wilds?

Transferring wilds move across one reel to another with the aim of providing more chance of winning. They do this by aiming to create one or more winning combos.

Cascading Reels Explained

Cascading Reels are a visually exciting feature. Instead of the reels spinning the symbols drop, or cascade, down to make room for a new symbol to land in empty slots. This also includes winning symbols.

What is The Gamble Feature?

The gamble bonus feature has long been a part of slot games, going back to the days of old fruit machines. It provides the chance to 'gamble' any winnings which will usually be doubled if you win. However, if you lose, winnings will be gone. The Book of Ra series is a popular choice with the gamble feature in the form of Book of Ra Deluxe 6 and Book of Ra Deluxe 10.

How Does The Retriggering Bonus Feature Work?

Retriggering is an exciting feature that allows you to extend the duration of a bonus round. Generally, repeating the action that triggered the bonus in the first place will set off a retrigger. In a Free Spins round, for example, landing scatter symbols could add further Free Spins to your remaining tally. Eye of Horus slot is a popular choice that includes the retrigger feature!

What Is The Tumbling Reel Bonus Feature?

Landing matching symbols that lead to a win in a tumbling reels casino slot can create even more wins. The winning symbols disappear before turning into different ones. Match more symbols again for even additional prizes. Pixies of The Forest and Pixies of The Forest 2 are popular online slots that include the tumbling reels bonus.

Progressive Jackpots

Progressive jackpot slots have a total jackpot prize that increases as more players spin the reels across multiple instances of the game. Head over to our jackpot slots to see our selection as well as find out more. Check out Slots O' Gold or Paws of Fury if you're looking for a jackpot game to play.

Types of Online Slots

Classic 3 Reel

Based on the original style fruit machines played over three reels, they are easy to play and the perfect choice for slot game beginners.

5 Reel Online

Similar to three-reel slots, but with the welcome addition of two extra reels, there's more opportunity to win.

Progressive Online Slots

On each spin, a small amount is added to the total jackpot prize for each instance of a game. Having more players means bigger prizes.

Mobile Slots

All of the games you'll find at Bet UK are available on mobile, desktop and tablet. This means you can play your favourite online slot game wherever you choose and get the exact same experience.

What are Multi-Payline Online Slots?

Multi-payline games differ from original slot games by adding more ways to win. They could be straight, diagonal, or even zig-zag. Slots that are based on the Megaways play style have an enormous total number of ways to win - generally as many as 117,649. Popular Megaways titles include Piggy Riches Megaways, Dragon's Fire Megaways, and Buffalo Rising Megaways.

Online Slot Game Key Terms

Total Bet - how much you are set to wager on the next spin of the game.

Autoplay - a function that means you can set the game to play through spins automatically.

Wild - a symbol in the game that can substitute for most other symbols.

Jackpot - the maximum amount you can win from one spin in that slot game.

Popular Online Slot Machine Themes

Irish slots and Egyptian slots are often talked about, and while they are undoubtedly some of the most popular motifs that are implemented, there are some themes across our collection that could be considered to be "under the radar". For example, animals seem to be a very popular slot theme here at Bet UK, perhaps surprisingly, but they cover classic games such as King Kong Cash, innovative games like Beehive Bedlam, and modern releases including Raging Rhino Megaways. Pop culture also plays a significant role, with online casino slots inspired by TV and film often being in demand - for example The Goonies Jackpot King and Beavis and Butthead slot.

Irish Online Slots

Irish slots have always been a familiar sight on the reels. That popularity has continued to grow and is used on some of the biggest slots of all time such as Rainbow Riches. On Irish-themed reels you will find a variety of good luck charms such as horseshoes, four-leaf clovers and pots of golds.

Fancy trying an Irish-themed game? Take a spin on Wish Upon a Leprechaun, Irish Riches Megaways or Rainbow Riches Pick 'N' Mix.

Egyptian Online Slots

Another hugely popular theme is Egyptian. With a wealthy history that has been shrouded in mystery, it's easy to see why this theme was been an extremely popular choice for bringing to the reels.

If you're ready to dig deep into the depths of Egyptian history have a look at playing Eye of Horus Megaways, Valley of The Gods slot or Legacy of Ra Megaways.

Animal-Themed Online Slots

Everybody loves a fluffy companion, which makes it no surprise that animals have taken over the spinning reels. From bunnies to buffalos there'll be an animal slot that suits you.

To stampede across the reels alongside your favourite animals try Wolf Gold and Great Rhino Megaways.

Video Game Slots

As slot games have become more developed with complex themes, bonus features and playing styles they have become like their video game counterparts. Video game slots have incorporated some of the biggest characters of all time in titles such as Worms Reloaded slot.

TV & Film Online Slots

Another theme that fits perfectly on the reels are TV & Film themed games. With a plethora of storylines and characters available as well as soaring popularity, they make the perfect addition to the reels.

If you'd like to delve into the world of TV and Film themed games join Sloth in The Goonies slot, get cheeky in the Ted slot or try and save the foodstuffs in Sausage Party slot.

Fantasy-Themed Online Slots

The fantasy theme is perfect for players looking to explore a whole new world. Scourer enchanted forests, mythical creatures and fantastic characters in fantasy-themed games that could lead to your craziest dreams becoming reality.

Ready to join the fantasy world? Spin the reels of Lucky Lady's Charm Deluxe, Lucky Lady's Charm Deluxe 10, or Immortal Romance.

Historical-Themed Online Slots

History provides a rich timeline for the world we live in with stories packed full of drama. For that reason, it's no shock to see history finding a place on the reels with many slots featuring war as the main theme.

Leap into a time machine and see the world as it once was in online slot games such as the Centurion slot, Vikings Go Wild or Rise of Maya.

Pirate-Themed Online Slots

Arr me Hearties! The history of pirates is packed with stories of hunting for long lost treasure. Take to the seven seas and walk the plank in one of Bet UK's pirate-themed slots, Pirates Plenty Battle for Gold.

Oriental/Asian-Themed Online Slots

The oriental/Asian theme has, like the Irish theme, long been a popular choice for game developers. Known for good luck charms, it's easy to see why this theme has emerged as being one of the most popular.

Try 88 Fortunes Megaways, Dragon's Luck, or Dragon's Luck Megaways.

Arcade-Themed Online Slots

For lovers of the classic fruit machine popular in pubs throughout the UK the arcade-style theme is the ideal choice. Expect diamonds, lucky 7's, Double Cherries and more! Simple to play but fun nonetheless, explore one-armed bandits in Mystery Reels slot, Sizzling Hot Deluxe or Reel King Mega.

Jewel and Gem-Themed Online Slots

Like arcade-style slots, the jewel and gem theme will resonate with old fruit machine lovers. Match precious gems for a chance to win. A great example of this type of online slot is IGT’s Da Vinci Diamonds.

Board Game/Game Show-Themed Online Slots

The game show and board game theme has become hugely loved among casino players in recent years with slots like Deal or No Deal Megaways entering our online casino. We don't think this trend will stop any time soon!

Try Battleships Direct hit or Snake Rattle and Roll for more slots based on board games.

The History of Slots

The idea of a slot was thought of all the way back in the late 19th Century, with the first gambling machine being developed in Brooklyn, New York, in 1891. Based on the game of Poker, the machine contained five drums and a total of no less than 50 cards. There were no set payouts either, with a good payout depending on the establishment in which you were playing in. For example, if you were playing in a bar and spun a pair of Kings you might have been given a drink on the house.

However, as there were so many ways to win it was practically impossible to create a set payout for combinations achieved, but this changed c.1893. Enter Charles Fey of San Francisco, the man behind the first machine that was capable of offering an automatic payout system depending on combinations achieved. Indeed, the ‘Liberty Bell’ was the first slot machine that offered an automated payout system and it’s fair to say it took the country by storm, with rudimentary live casino playing card suit symbols and symbols of luck featuring prominently, which games such as Wild Frames show have stood the test of time.

It stayed like this until 1963, when Bally Manufacturing (now Bally Entertainment) created the first fully electromechanical slot machine named ‘Money Honey’. It featured a bottomless hopper and this allowed for automatic payouts of up to 500 coins at a time. It was 13 years later that the first video slot machine was developed in California by the Fortune Coin Company. Debuting in the Las Vegas Hilton Hotel, the slot machine was approved by the Nevada State Gaming Commission and found itself on the Las Vegas strip as well as other surrounding casinos.

What are Slots Like Now?

With the successful introduction of video slot machines, coupled with the ever-growing technology industry, the crossover was always going to happen between land-based slot machines and the online world. Gone are the days of playing with 50 cards, or even five symbols for that matter, as slots have developed a lot over the years. Even the foundation of the more conventional slot back in 1963 has been given a serious makeover, as there have been considerable changes to the reel system, amount of symbols, value of symbols and the paylines. Due to these changes, we at Bet UK understand that getting an initial understanding of online slots may be difficult, so we’re going to go through the core foundation of what makes up a slot so you can be confidently spinning the reels in no time.