Best Online Slot Sites 2023

How to Start Playing Slots Online

Pretty much every online casino site boasts a range of top slot games for players to enjoy. This means slots fans are spoilt for choice when it comes to picking the best site. You’ll need to be clued in on exactly what a site has to offer before you sign up to start playing. Luckily for you, Compare.bet has everything you need to know about playing slots online, from the very basics of how slots work, to claiming a bonus at online slot sites.

You can start playing online slots in just a few simple steps:

RNG Slots

Unlike other casino games, such as blackjack and poker, playing slots online involves little skill. Luck alone determines whether or not you’ll hit a winning symbol combination when the reels stop spinning. Whichever symbols appear on the reals are determined by a random number generator (RNG), ensuring that the outcome of every spin is random and, as a result, fair. Under the Licensing Conditions and Codes of Practices set by the UK Gambling Commission (UKGC), every UK-licensed casino must use this technology on all games.

This RNG technology determines which symbol will show on each reel at the end of the spin. The outcome of every spin is separate from the previous and next spin, which means you’re never ‘due’ a win. Likewise, if a slot has just paid out the jackpot prize, there’s no saying it won’t pay out again on the next spin.

How Online Slots Work

It’s pretty simple to learn how to play slots at an online casino which is why these titles are always so popular – just set your bet, hit the spin button and wait to see if you get lucky. Even if you’re playing one of the latest video slots with multiple paylines and bonus features, the basic premise is the same. Sure, you might need to set your coin size and select the number of paylines you want to bet on, but that’s pretty straight forward too.

The more paylines you bet on, the more ground you cover. Just remember that your bet will multiply by the number of paylines you bet on, increasing your overall wager for that spin.

If you do land a combination of winning symbols, you’ll know about it. Music will play and images will appear on the screen to let you know that you’ve struck lucky. You’ll then have the option to use your winnings to play again or to keep them in your casino wallet. 

How We Review Online Slots Sites

When we review online slots sites, we do so with slots players like you in mind. We take a look at everything from banking to bonuses to find the best slots sites to recommend to UK players. Here’s what’s on our hit list: 

Licensing

A current gambling licence from a reputable licensing body confirms that a slots site is a safe and fair place to play, and also that the site undergoes regular audits by third-party testing companies like eCOGRA. Here at Compare.bet, all our recommended slots sites for UK players are licensed by the UK Gambling Commission.

Welcome Bonus

Whether it’s a bundle of free spins, bonus funds or both, we love to see slots sites roll out the red carpet for new players with a great welcome offer. Our reviews take a deep dive into slot site sign-up deals to check which terms apply, highlighting restrictions such as wagering requirements and winning caps, and showing you where to find the best slots site offers. 

Choice of Games

When we undertake slots site reviews, we always hit up the game tab to see what’s in store for players. The best slots sites complement a selection of many hundreds or thousands of real money online slots with classic table games like blackjack and roulette, and many offer live dealer games too. 

Payment Methods

We think it’s important that slots sites offer a range of trusted payment methods, so our reviews always include a look at the cashier page. We expect to see options such as debit cards, Trustly and Paysafecard, as well as e-wallets like PayPal, Neteller and Skrill. Our reviews also cover deposit and withdrawal time frames, along with details of any fees. 

Customer Support

Great customer support is a must for any business, and online slots sites are no exception. When we review new slots sites, we examine what’s available in terms of help for players. At the best slots sites, a comprehensive FAQs section is backed up by a variety of ways to get in touch with the team. This might include live chat, along with email and phone support. 

Site Design

We spend time getting to grips with a slot site’s design and usability. We’re not interested in dreary sites that make it difficult to get to where you want to go. At Compare.bet, you’ll find fast-loading sites with fresh designs and straightforward navigation. 

Mobile Compatibility 

Playing slots on your mobile is great fun and also convenient, so we include detailed info about mobile compatibility in our slots sites reviews. Most sites have a mobile version of their main desktop site, but the best slots sites also offer native mobile apps. These apps come with perks like improved security and bonus code notifications, and are often available for Android and iOS mobile devices and tablets.

Slots You Can Play Online

Online slots might be simple, but there’s still plenty of variety when it comes to the games on offer. Whether you’re a fan of traditional fruit-machine style slot games, or prefer all-singing, all-dancing progressive jackpot slot games, the best online slot sites have something for everyone.

Classic Slots

These slots hearken back to the days of fruit machines, though the symbols aren’t necessarily fruit, bells and lucky 7s. Most classic slot games have three or five reels, making it pretty easy to select your paylines, which are almost always in one direction. This simplicity makes them a popular choice among slots newbies.

• Mega Joker – Released in 2013, NetEnt’s Mega Joker is a 5-reel, 3-row slot with high volatility and an RTP of 99%. The slot is designed to look like a traditional fruity and offers a max win of 2,000x the stake. 
• Cleopatra – Featuring a 95.02% RTP and a max win of 10,000x your bet, IGT’s Ancient Egypt-themed Cleopatra slot features a thrilling bonus game with up to 180 free spins available to lucky players. 
• Double Diamond – Packed with cherries, bars and lucky 7s, Double Diamond is about as simple as it gets. This 3-reel slot features a single payline, an RTP of 95.44% and a jackpot prize of 1,000x the line bet. 

Mega Joker is one popular classic slot, with an appearance akin to a real fruit machine.

Video Slots

Video slots tend to have more going on that classic slot games. Expect crazy themes, tailor-made soundtracks and graphics that could give some video games a run for their money. These games offer players multiple ways to win, with some titles offering over 1,000 paylines in every direction you could imagine. Video slots also tend to have more bonus rounds and in-game free spins than classic slots. Video slots are perfect for players looking to combine their love of online casino with their favourite films, TV shows and music genres, with software developers such as NetEnt and Playtech partnering with big production companies to create branded video slots.

• Starburst – An iconic online slot released in 2012, Starburst is a 5-reel, 3-row slot with 10 paylines and an RTP of 96.09%. This galaxy-themed online slot game features dazzling wilds, respins, a win both ways feature, and a max prize of 50,000 coins.
• Book of Dead – A 2016 release by Play’n GO, Rich Wilde and the Book of Dead is a 5-reel, 10-payline slot with a 96.21% RTP. This Egyptian-themed slot pays out a top jackpot of 5,000x the line bet. Land 5x Rich Wilde symbols to make it yours. 
• Gonzo’s Quest – Launched in 2011, Gonzo’s Quest is a 5-reel, 3-row slot from NetEnt. Set in a lush rainforest, the game features 95.97% RTP, 20 paylines, avalanche reels and a max win of 2,500x the bet. 

NetEnt’s Starburst is arguably the most popular video slot of all time, owing to its simple gameplay and inclusion in free spins offers.

Penny Slots

You don’t need to be a high roller to play online slot games, thanks to penny slots. You can bet as little as 1p per spin on these titles, which is great if you want to play real money slot games but have a limited budget. But that’s not to say that penny slots are a budget option, you’ll still get high-quality graphics, top-notch soundtracks and the chance to win big.

• Double Tigers – Set in Ancient China, Double Tigers is a 2018 release from Wazdan. This animal-themed penny slot is packed with great features, including adjustable volatility levels and a max win of 40x the bet. 
• Pirate’s Charm – Launched in 2018, Pirate’s Charm is a 5-reel, 3-row slot with 243 paylines and 96.49% RTP. This Quickspin slot offers players a swashbuckling adventure packed with mystery charms, respins, and a top payout of 1,215x the bet.
• Disco Bar 7s – Another 2018 release, Booming Games’ Disco Bar 7s is a disco-themed slot with 3 reels and 10 paylines. A low volatility game with 95.96% RTP, this slot offers scatter pays, a mix ‘n’ match feature, and a jackpot of 10,000x the bet.

Progressive Jackpot Slots

This is where real slots enthusiasts get excited. Whereas most slot games have a fixed prize for winners, the prizes for progressive jackpot slot games just keep growing! However, even progressive games come in different shapes and sizes. Whereas some jackpots are specific to the online casino at which you’re playing, others are pooled between different casinos sites. Whatever the nature of the progressive jackpot, the size of the prize pool increases as players wager. These jackpots have been known to hit the hundreds of thousands, with titles such as Mega Moolah and Mega Fortune making players millionaires!

• Mega Moolah – A safari-themed slot released in 2006 by Microgaming, Mega Moolah is a medium volatility 5×3 slot with 25 paylines and 88.12% RTP. This slot offers a max win of 15,000 coins in the base game and four progressive jackpots, the largest of which seeds at £2 million.
• Beach Life – A 2006 release from Playtech, Beach Life is a sunny slot with 5 reels, 20 paylines, and an RTP of 93.25%. Featuring scatter symbols and an exciting bonus game, Beach Life pays out the jackpot for a max bet for landing 5 wilds on the 20th winning line. 
• Arabian Nights – NetEnt’s Arabian Nights slot launched in 2013. The game features 5 reels, 10 paylines, and up to 95.62% RTP. The game packs in an exciting free spins bonus round alongside its progressive jackpot prize.

Mega Moolah regularly pays out jackpots into the millions of pounds to the luckiest players.

In our January 2021 interview with award-winning game studio Blueprint Gaming, Jo Purvis, Director of Marketing and Relationships, spoke to us about Blueprint’s Jackpot King progressive jackpot series and why the genre is so popular.

“There’s a large segment of players that absolutely love the possibility of winning huge amounts of money from any spin. For them, it enhances the gaming experience and adds something extra to the gameplay. Jackpot King is so successful because players have the opportunity of winning some amazing prizes, but they also get to play quality games at the same time. It simply makes for an entertaining experience, and those fortunate enough to reach the Wheel King are always on the edge of their seat in anticipation of what awaits.”

Features of Online Slots

Today’s slots players can forget about the nudge and hold features of traditional one-armed bandits. Modern online slots leave retro fruities in the dust with oodles of exciting features that make gameplay more thrilling and can boost your wins too. Let’s look at some of the common components of online slot machines. 

Reels 

Sitting vertically on the screen, spinning reels are the bedrock of online slot games, affecting both gameplay and the number of ways to win. Classic slots like Jackpot Jester and Couch Potato tend to have just three reels, while modern video slots such as Starburst and Book of Dead have five. For certain games, however, it’s the more the merrier where reels are concerned. The Raging Rhino slot, for example, has six reels, while Jammin’ Jars has eight. 

Some developers also tinker with the mechanics of the reels, as well as the quantity, with avalanche reels being the perfect example. Also known as cascading or tumbling reels, this feature sees symbols that form part of a winning combination pay out before the symbols fall away, explode, or otherwise disappear from the payline. This allows new symbols to drop and, potentially, new winning combinations to form. 

Paylines

A payline is a line on a slot game which pays out if certain combinations of symbols appear. Traditional slots usually keep things simple with a single payline running from left to right. However, modern video slots have no such limitations, often featuring 5, 10, 20, 50 or 100 paylines which may run horizontally, vertically or in diagonal and zigzag patterns.

And that’s not the only way that paylines have evolved — games like Crazy Chameleon and Turning Totems have a Win Both Ways feature, which allows winning lines to form from left to right and from right to left. Meanwhile, Megaways slots, such as 88 Fortunes and Bonanza Megaways, use a reel modifier to alter how many symbols appear on the reels each round, creating many thousands of ways to win. In Cluster Pays slots like Astro Legends and Honey Rush, payouts are determined by the number of symbols that form clusters of five or more. 

Symbols

The latest slots feature a huge variety of themes, so you might find yourself matching anything from Irish leprechauns to Egyptian treasures. Many slot games also feature wilds and scatters. Acting as substitutes for other paying symbols to help you get a winning combo, wilds come in a range of styles, which do pretty much as their name suggests. Think sticky wilds, expanding wilds, walking wilds, multiplier wilds and more. 

Wilds might be depicted as a simple logo, as a character of the game or as something else, but all serve to ramp up the chance of a payout. Scatter symbols work a little differently from wild symbols. Landing three or more scatters anywhere on the reels will typically trigger a bonus round where you’ll find even more goodies up for grabs.

Bonus Rounds

For many players, bonus rounds are the most exciting part of slot games, as it’s these games that increase your odds of landing a big win. Many bonus rounds are triggered by landing three scatter symbols, but this does vary, so remember to check what’s what in the paytable before you jump into real money play. Some games, such as Net Gains and Super Fruit Smash, include a feature that allows players to buy into a bonus round using cash. 

You’ll find that the nature of bonus games varies between slots. Some games require you to pick from three or more things like lucky chests, wishing wells and golden eggs to win a bundle of free spins. Other bonus rounds offer multipliers that increase your final payout, and some slots will even give you a choice of bonus games.

Mobile UK Slots Sites

With so many players choosing their mobile for online gambling, slots developers often create games with mobile players at the top of the priority list. This means there’s plenty of choice when it comes to mobile slot games. If the title has been built with HTML5, it’ll function identically across any device and operating system, whether you’re playing on desktop, mobile, or tablet. Furthermore, some of the best new slot games have been created especially for play on a smaller touch screen. Not only does this mean you can benefit from improved usability, but high-definition graphics too.

Mobile Slots Apps

Every slot site on our list has a mobile-friendly website, but the best offer native mobile casino apps for Android and iOS, which makes playing mobile slot games a breeze. Once you’ve downloaded the app, you’ll be able to sign into your casino account, ready to get from your home screen to your favourite title in just a couple of taps. As these apps are stored on the device, you’ll use less mobile data and won’t have to wait as long for pages to load. And if you’re looking to keep everything at your fingertips, pay by mobile slot sites could be a great option — you’ll only need your phone number to make a deposit. Here’s a roundup of the benefits of playing real money slots on a mobile app:

• Accessible in a few taps from your home screen, with no need to fire up a browser
• Locally stored data offers quicker loading times and smoother gameplay
• Real money slots and casino games available to play 24/7
• Available for Android and iOS mobile devices
• May offer app-exclusive slots bonuses and promotions
• Optional push notifications to alert you of new bonus codes
• New UK slots apps coming online all the time, providing players with plenty of choice

Other Games at UK Slot Sites

When you’re looking to vary it up a bit, the best UK slot providers also offer their customers a range of other games to try out. This can include table games such as blackjack, roulette and poker, in addition to a selection of live casino games. But which is best for you? Let’s break down the choices and find out.

Table Games 

Blackjack is one of the most popular table games to play at online casinos.

Table games are probably the games most people think of when they hear the word ‘casino’ and include the familiar favourites of baccarat, roulette, craps and blackjack sites. Baccarat and blackjack are classic card-based table games with very simple rules. Craps and roulette have more complex betting options, but you can get a handle on them fairly quickly. 

But there’s a question many people ask — how can an online casino deal cards, spin wheels or roll dice and ensure everything is fair? This is where RNGs or random number generators come in. They’re vital for the online gaming industry with all respectable online sites using them to ensure clarity and fairness. They work by replacing the manual card shuffle with a mathematical algorithm to ensure each dice roll or wheel spin is random and unpredictable. It provides the all-important chance factor with table games, ensuring gamblers feel confident that nothing is fixed. 

Live Casino

Live roulette is massively popular in the live dealer category.

Live casino games add a real spark of magic by bringing another element into your game play, streaming from studios across the world. This means you can play games with a top class live dealer from the comfort of your own home. Typically, live casinos offer the classic games you would typically find in a land-based casino. However, the content range is always growing, and has been taking inspiration from popular game shows such as Deal or No Deal. Something to be mindful of when choosing your live casino game is that while these titles are enjoyably immersive, they can sometimes require a higher minimum wager. 

Poker 

If you prefer a game requiring skill and strategy, poker might be up your street.

Poker is an iconic casino game that has developed over time to adapt to current themes and gaming trends. Typically one of the best parts of poker is watching the people around you for a tell-tale reaction, and while this may not be possible with online poker, the live dealer version provides the atmosphere of a real casino through your laptop, phone or tablet. There are many variants of online poker, including the most widely recognised Texas Hold’em, Omaha, and Seven Card Stud. Though each follows different rules, all have the aim of creating a strong hand to win the game.

Claim Your Bonus for Online Slots

The best online slot sites reward players for choosing their site. A welcome bonus is the most common offer, but there are also other slots bonuses up for grabs through other promotions, such as happy hours and VIP rewards. You can get your hands on these bonuses at the top slot sites:

Free Spins

Free spins are the ultimate bonus for online slots. This bonus is as simple as it sounds: you can play real money slots using these tokens — no need to dip into your own wallet. Some new online casinos offer a set number of spins when you make a qualifying deposit, whereas others offer free spins in relation to how much you deposit. 

Also known as bonus spins or extra spins, free spins will almost always be for selected games, such as Valhalla or Book of Dead, though some offers allow you to take your pick from a range of games from the same developer. Time limits often apply too, with most sites giving you 24–72 hours to use your free spins and between three and 30 days to complete any wagering requirements. Not all sites attach playthrough requirements to free spins winnings and other casino bonuses, but, where they do, 35x is about average. 

The welcome bonus for new players at Mr Q provides a real-world example of a free spins offer. This site gives you 20x free 10p spins on Fishin’ Frenzy: The Big Catch when you make your first deposit of £10. Free spins are credited automatically, so you won’t need to opt in or use a promo code. You just need to remember to use your free spins within the two-day expiry time. There are no wagering requirements to worry about, nor a winning cap, with any winnings from these free spins credited as cash to your casino wallet. Mr Q will also give you 10 extra spins for free when you verify your mobile phone number.

No Deposit Free Spins

You don’t even need to make a deposit to claim a free spins no deposit bonus. Simply sign up, verify your account and opt-in. Once the free spins are credited to your account, you’ll be in with a chance of winning real money on slots, without spending a penny of your own.

Matched Deposit

Matched deposit bonuses are one of the most common casino offers. You’ll receive a percentage of your first deposit as free casino credit. Percentage matched will vary between online casinos, ranging from 25% to as much as 200%, though there’s almost always a limit to how much credit you can actually claim. These bonuses are ideal if you’re interested in other casino games, besides slots. Of course, you can play slots with this credit, but you can also use it on the likes of online roulette and blackjack games.

Some online casinos spread the matched deposit bonus across your first two or three payments rather than in one lump-sum.

No Deposit Casino Credit

These bonuses work in a similar way to matched deposit deals, but you won’t need to dip your hand into your own pocket first. Much like no deposit free spins, you have a chance to win real cash even though you’re playing for free. No deposit bonuses are usually more modest than matched deposit deals— usually £5 free no deposit at most— but you can play a whole host of casino games, including online slots, with your rewards.

Bonus Terms and Conditions

There will be terms and conditions attached to whichever online slots bonus you choose and you’ll need to factor these in when comparing bonuses. Wagering conditions apply to pretty much every offer bar no wagering bonuses, and you can’t withdraw any bonus winnings until you complete these.

On top of wagering requirements, there are also other terms to consider. Some slots bonuses may only be used for selected titles, such as the newest games. Sites may also restrict how much you can win with your bonus, how long you have to complete any wagering requirements and how much you can withdraw at once.

Here are a few of the most common T&Cs to be aware of:

• Wagering requirements – you’ll need to meet these to withdraw the bonus and any resulting winnings
• Time limits – bonuses expire after a given period so make sure you use them before they run out
• Game restrictions – most free spins offers will be for a specific slot game, while matched deposits can be used on a wider choice
• Payment exclusions – if your offer requires a deposit to claim it, make sure you use an eligible payment method; e-wallet deposits will often disqualify you from receiving a bonus
• Winnings caps – there may be a maximum amount of money you can win from a bonus

Offers for Existing Customers

While the most generous offers are reserved for new customers and first-time depositors, the best online slots sites provide plenty to reward returning customers. You’ll often find free daily spins, cash giveaways, free spins promotions that coincide with holidays or the release of a new game, lucrative slots tournaments, and loyalty programmes. 

Loyalty Programmes

The best slot sites offer loyalty programmes that allow players to collect points to swap for rewards. It’s generally simple enough to earn loyalty points at online slot sites, with most schemes handing out loyalty points every time a player places a real money bet on slots or casino games. When it comes to the loyalty rewards, these can vary between different slots sites. One of the most common treats is a bundle of free spins for a popular online slot like Starburst or Book of Dead, but some sites also offer players the chance to exchange loyalty points for cash. 

Slots Tournaments

Slots tournaments don’t actually cost extra for entry. It’s simply a promotion that adds the element of competition to a game designed for solo play. Each online slot site will have different rules, formats, and prizes but a typical tournament format will see any winnings on slot games in a predetermined period of time converted into a point score for a leaderboard. When the event ends, the top-ranked players will win a prize in the form of bonus cash, real money, player points or — in some instances — some sort of exclusive gift. 

Playtech is just one of the software providers that give slots players an opportunity to compete against each other for prizes. The developer partnered with Buzz Bingo to launch slot tournaments. In the partnership announcement, Playtech Casino Director, James Frendo, said:

“Tournaments offer a whole new way to engage players, as well as add an extra level of enjoyment for players at no extra cost to themselves. Also, because points are awarded based on the size of the win in proportion to the bet, players who prefer to stick to lower stakes are not disadvantaged, encouraging them to stay within their limits.”

Player vs Player Features at Slot Sites

Some sites might offer player vs player features to add an extra layer of excitement, where you’ll compete against real people for the biggest wins. Voodoo Dreams and Duelz are two examples. In both cases, you’ll be paired up with an opponent when you play slots at the site, casting spells and dealing damage every time you win. Knock your enemy down and you’ll net bonus points and experience which can be used to unlock rewards including free spins and bonus credit. It’s a bit like a loyalty scheme — the more you play, the more you’ll benefit. Each site has their own take, so it’s important to check the FAQs so you know how to take part. 

PvP features are not the only way that online casinos and slots sites encourage interaction between players. Multiplayer games with chat features that make the gaming experience more realistic are becoming increasingly popular. PokerStars and Megaways Casino both offer chat in their online poker rooms, though you’ll be limited to emojis and set phrases. For full chat options, you can also swing by online bingo rooms. Here, players chat freely while playing real money bingo.

Slot Tournaments

Slot tournaments are another PvP feature, although you’re not directly facing off against anyone. Rather, all players are competing to top the leaderboard for the most wins or the biggest win relative to the stake in a specific game. Place in the upper ranks when the time runs out and you could walk away with a cash prize. 

Tournaments are often hosted by games developers, which means that you won’t be up against players on the same slot site. Instead, you’ll play against players from lots of different sites. One tourney that’s popular with players is Pragmatic Play’s Drops & Wins, which offers random cash drops and huge weekly prizes.

Slots Tournaments Pros and Cons

Play Slots Online Without Spending a Penny

You don’t need to spend a penny to play online slots. Pretty much every slot game, with the exception of progressive jackpot titles, are available in free play mode. Free online slot games are ideal if you simply want to play slots for fun or try out a new slot game before you put real money on the line.

Of course, you can’t win real money when you play free slots, but you do get to sample all the same bonus features as real money games. Whether your title features expanding reels, walking wild symbols and scatter symbols, you get to see what all the fuss is about without dipping into your own wallet.

Try Out the Freshest Online Slot Sites

The great thing about online slot games is that there are always new titles popping up. There’s plenty to keep online slots players entertained as multiple brand new slot games are released each month. With each new release, online slots developers wow players, be that with bigger brand partnerships, higher definition graphics or bigger progressive jackpots.

Understanding High RTP Slots

It’s important to understand the return to player (RTP) percentage of a slot game before you start playing, as this gives you an idea of how much you could theoretically win. These percentages are calculated over an infinite number of spins, which means you could win more or less than this percentage of wagers during your period of play.

When it comes to RTP, the closer to 100% the better. Most online slot games have an RTP of around 90% and those over 96% RTP are generally considered high payout slots. However, some of the highest paying slots offer even higher payout percentages.

What is Volatility?

A level of volatility is placed on slot games as an indicator of risk, with the rankings of high, medium and low correlating to the amount you can expect to win. For example, a low volatility slot game is likely to offer regular wins but usually of smaller amounts. A high volatility slot might see bigger winners but achieved less frequently. Overall, high volatility equals higher risk and low volatility equals a lower risk. 

Because of the level of risk involved, it’s advised that you take your own personal bankroll into account when choosing between a high or low volatility slot. If your budget is smaller then you may want to stay with the lower level volatility games. You’ll find that before you start playing, the best UK slot providers will declare a game’s volatility so you can be sure it’s the right one for you.

Best Slots by Software Developer

It was over two decades ago that we saw the first online slot casino. Ever since then, the number of UK slot sites has expanded, boasting a vast array of exciting and often elaborate games. Over the last few years, developers have really brought their A-game to aspects such as design, entertainment, and ease of use. With this in mind, here’s a breakdown of some of the slot providers whose wares you’ll find at the best slot sites, along with an overview of the top titles they offer to UK players.

Best NetEnt Slots

Gonzo’s Quest is one of the best-known NetEnt slots, and the titular conquistador has since become the mascot of the company.

Established in Sweden in 1996 as one of the first online gambling companies, NetEnt has grown internationally to become a top iGaming provider. The company prides itself on popular innovative games and cutting edge platforms, with its repertoire including popular slots and video slots, as well as classic table games such as roulette and blackjack. One unique feature of NetEnt is its avalanche mechanic, developed back in 2010. Activated when you hit a winning combination, the mechanic makes the matched symbols disappear, with cascading symbols filling their place to potentially create new combinations and lead to more winnings. Be sure to try some of the following titles:

• Gonzo’s Quest  – Displaying beautiful graphics, this game is based around the charismatic Gonzo, a Spanish explorer who is looking for the lost golden city of El Dorado. Offering a medium-high volatility and an RTP of 95.97%, Gonzo’s Quest was the first slot to feature NetEnt’s avalanche mechanic feature.
• Starburst – First released in 2012, this highly popular and iconic slot has five reels and three rows with ten paylines. Starburst offers a low volatility and a 96.09% RTP.
• Silverback Gold – One of the latest games to come from NetEnt, Silverback Gold has a high volatility and an RTP of 96.11%. This game is jungle-themed and involves high and low value jungle animal symbols, free spins, and the gradual collection of tokens that transfer low value symbols into high value. 

Best Microgaming Slots

Game of Thrones is one of Microgaming’s many branded slots.

Based on the Isle of Man, Microgaming was founded in 1994. It stands as one of the first online casino platform providers and creators of online casino software. Specialising in slots and boasting some of the top jackpot games around, Microgaming’s titles are available at many of the best slot sites in the UK. There are over 2,500 games integrated into its platform, so this slot provider has something for every taste. Here’s a few of our favourites:

• Mega Moolah – First released in 2006 and holder of the world record for the highest slot payout, this game offers 5 reels and 25 paylines. It’s safari-themed with comical animals spinning along each reel. Great for playing on mobile, it holds an impressive RTP of 97%.
• Game of Thrones 243 – Including 5 reels and 3 rows, its name points to the fact there are 243 ways to win. This is an exciting game based on the popular TV show with the highest paying symbols based on the main characters.
• The Vault – Offering 96% RTP, a high volatility and x5000 win potential, this game is ideal for gamblers who enjoy an exciting gaming experience with dynamic graphics.

Best Play’n GO Slots 

Book of Dead is frequently featured in free spins offers and is the second title in the Rich Wilde series.

Since its launch as an independent company in 2005 in Sweden, Play’n GO now has a presence at online casinos in over 25 jurisdictions internationally. Known for its state-of-the-art visuals, creative features and unique, fun game design, it caters to every player’s needs with a slot portfolio of varying volatility ranges. All games are optimised for smartphone and tablet use, meaning they are easily accessible on the go via iOS and Android devices.

Play’n GO works with a strong sense of community, holding customer safety at the heart of its work. The company even has plans to be climate neutral by 2025 and net zero by 2030. Try some of these best Play’n GO slots:

• Book of Dead – With a maximum win potential of x5000, this flagship game offers 5 reels and 10 paylines. It offers a free spin feature which can lead to unlimited spins, and an expanding symbols mechanic that can unleash bigger wins.
• Honey Rush – Released in 2019, this cascading grid slot is set across four levels, each of which can be reached through winning combinations. Reach the top level and you have the chance of a x9000 payout. 
• Animal Madness – One of the latest games from Play’n GO, this slot is perfect for newcomers with its simple and clear goals. It offers an RTP of 96.2% and a maximum win of x2250.   

Best Playtech Slots

Playtech achieved huge success with its Age of the Gods franchise which now totals over 30 different games.

Playtech has created over 200 slot games since its launch in 1999. Through its pioneering casino game development, the company has evolved into the biggest online gaming software supplier. One of its latest creations is Playtech ONE, a system allowing gamblers to access any game on any platform through a single account. Playtech caters to every level of casino player, offering everything from live dealer games to the latest slot technology. Its range of slots is a huge appeal, with creative themes and even the introduction of a shared jackpot style slot game. Some of their top slots titles are:

• Age of the Gods – With 5 reels, 3 rows, and 20 paylines, this Ancient Greek God-themed game is a popular choice for gamblers. There’s a chance for a x10,000 payout if you consecutively reveal five of the six high-scoring God symbols.
• Beach Life – A sunshine-themed game with 5 reels, 3 rows, and 20 paylines. Look out for the treasure chest symbols which activate the Sunken Treasure Bonus game and leave you with the opportunity to land a progressive jackpot.
• Everybody’s Jackpot – The concept behind this popular progressive jackpot is that every player who has placed a minimum deposit in the last 24 hours will take a share of the jackpot. It offers a traditional 3-row and 3-reel appearance, with 8 permanent winlines that independently move left to right or up and down, uniquely increasing a gambler’s chances of success.  

Best Yggdrasil Slots

Double Dragons is one of Yggdrasil’s most popular slots.

Yggdrasil has been winning awards ever since it debuted on the scene in 2013. In 2022, the company added to its list of gongs with the Platform Supplier of the Year accolade from the EGR Nordics Awards, and RNG Casino Provider of the Year from the Gaming Awards. Licensed in 24 jurisdictions, Yggdrasil hosts a selection of slot games that hit the highest levels of quality in artwork and design. Try out some of the following:

• Jungle Books  –  This popular game holds an RTP of 96.1% and a low volatility, and its maximum pay out is £500,000. The creativity of this game is huge, with 45 possible feature combinations. Through this game, Yggdrasil introduced Fusion Realms, a new mechanic that mixes a range of different reel structures and design features into the game.
• Spina Colada –  A cocktail-themed slot game with a host of re-spins, multipliers, and four bonus features. The respin feature is available throughout the game. Symbols that match are frozen and the others replaced, each spinning until the right combinations are achieved. There’s also the benefit of a bonus round that guarantees a win each time.
• Double Dragons – With 5 rows and 25 paylines, this aesthetically impressive game contains dragon’s eye symbols on the reel. If you achieve four consecutive wins, you’ll open up the Double Dragon feature, unveiling two high-stack wilds that can be up to 28 symbols long. 

Best IGT Slots

Wheel of Fortune is one of IGT’s best-known slot games.

Around since the 1950s and now employing more than 10,000 people across the globe, IGT is one of the biggest players in the gaming industry, offering land-based gaming machines and lottery products, as well as sports betting and digital gaming. Headquartered in London, the company is the holder of some pretty impressive silverware, not least Casino Supplier of the Year from the 2022 Global Gaming Awards London.

Give some of these titles a go:

• Wheel of Fortune – IGT is behind the popular Wheel of Fortune slot. The original game, based on the TV show, is now joined by new variations like Wheel of Fortune Elegant Emeralds and Wheel of Fortune Megaways. Gameplay and RTP varies between the different titles, so there are plenty of different ways to enjoy the game. 
• Medieval Money – Slots players were first introduced to Medieval Money in 2016, though this is a slot that takes you much further into the past. Cartoon-style graphics, jousting knight wilds and huge potential payouts of up to 25 million coins all add to the fun. The standard RTP is 96.30% but some casinos might set this lower, so be sure to compare UK casinos and slots sites before making your first deposit.
• Silent Movie –Silent Movie transports players to the roaring twenties where an old movie theatre takes centre stage. Unlike many IGT slots, Silent Movie doesn’t offer a progressive jackpot. However, with 30 paylines, winnings multipliers, wilds, scatters, and free spins galore, that won’t be a deal breaker.

Responsible Gambling at UK Slot Sites

While gambling and playing online slot games can be a great form of entertainment, it’s important to be mindful of knowing your limits and to recognise when it’s becoming a problem. 

At Compare.bet we keep responsible gambling at the forefront of everything we do, and we have a few tips that we recommend all of our users follow. 

• Only play slots at licensed UK online casinos 
• Set a budget and keep to your limits
• Be mindful of why are you gambling and recognise when it’s no longer for fun 
• Set a time limit for your play sessions
• Never chase your losses – you can quickly find yourself in an even deeper hole, and it’s not worth the risk
• Avoid drinking alcohol while gambling, or playing while tired or upset
• Understand the game you’re playing before you place a wager
• Don’t be tempted to view gambling as a way of earning money

Where To Get Help

It’s a huge step to recognise when gambling is no longer fun, or has become a problem that’s affecting other areas of your life. Thankfully in the UK, there are many fully-trained professionals working for organisations who offer support for problem gambling and addiction. If you feel it may be beneficial to seek help for yourself or someone close to you, take a look at the list below to see who may best suit your support needs. 

• GamCare – this national charity is ideal if you need information or advice relating to problem gambling. It offers 24/7 support via web chat and hosts a National Gambling Helpline (0808 8020 133).
• GAMSTOP – the best way to immediately control your online gambling is with GAMSTOP. Once registered with the service, you will be self-excluded from gambling websites and apps relating to companies licensed in Great Britain for a period of your choosing. 
• www.BeGambleAware.org – another great charity offering information while supporting people in making informed decisions about safer gambling.
• Gamblers Anonymous  – locally run groups that hold regular meetings to help support those affected by problem gambling.
• National Problem Gambling Clinic – this forms part of the National Gambling Treatment Service and is commissioned by both NHS England and GambleAware. It looks to advance and develop psychological therapies for people struggling with problem gambling.

Compare Slot Sites and Sign Up

Now that we’ve taken you through the ins and outs of online slots, you’re ready to head to the casino and spin the reels! Not sure where to play? You’re sure to find your best bet from our carefully curated list of top online casinos. It’s jam-packed with casinos that offer the best slots, promotions and bonuses you’ll find online. Simply compare and sign up to claim your welcome bonus!

Top 10 Best Licensed Slots Casinos for UK Customers:

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playtech.com – Buzz Bingo and Playtech partner to launch slot Tournaments

gamblingcommision.gov.uk – New rules to make online gambling in Britain fairer and safer

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