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How we evaluate online slots
Our team here at Gamble have a great deal of experience. We’ve in the gambling industry for more than 10 years now, so we know just what to look for in the best slots sites. Our experts follow a strict set of guidelines when reviewing online casinos and slots. So that they can bring you the newest and greatest slot games on the UK market.
What we look at
- Theme and Design: How a game looks and feels is definitely one of the most important factors when determining the quality of a slot machines. A good slot game should run smoothly and have a fun theme which makes the game entertaining.
- RTP: This stands for Return To Player, and basically tells you how much the machine pays out for every pound that is wagered on the game. We cover much more about this later in the article. Obviously, the higher the RTP, the better it is for the player.
- Features: Does the game have bonus features, or a free spins mode? Does it have wild- and scatter-symbols? These are the things that make a slots game really stand out from the crowd.
- Originality: There are thousands of slots available online. But many of them are just the same, only with slight variations. We try to find slot machines that are unique in terms of themes and features – games that you remember and want to play again!
Once they have looked at all these aspects, our reviewers can bring you the very best slots games that the UK has to offer, from the top online casino operators.
With thousands of slot machine games coming onto the market all the time, it can be overwhelming trying to choose the best ones to play. Luckily, because our experts know exactly what to look for, they do the hard work for you. So, let us go through and review all the top slots from all over the UK, so that you don’t have to.
What is a slot machine
The word ‘slot’ refers to the action of inserting a coin into a machine, and the name ‘slot machine’ is used all over the world to describe all slots games. Other names include fruit machines (named for the typical symbols on the reels), fruities, pokies and one-armed-bandits.
The history of slot machines goes back to 1891. The first known ‘gambling machine’ was invented by Sittman and Pitt in Brooklyn, New York. Effectively, it was a poker machine, where players would insert a nickel and try to get a winning poker hand. It proved to be incredibly popular, but the odds were hugely in favour of the machine, with some cards being removed in order to reduce a player’s chances of winning. The machine also wasn’t capable of paying out cash, so players would get rewarded in free drinks and cigars.
It was this machine that gave way to the Liberty Bell, which is widely regarded as being the first real slot machine. This machine used 3 reels with symbols, rather than playing cards, and the idea was to match the symbols to win a prize. This is still the premise that is used today, and although slots have come a long way, they still follow the same pattern as the Liberty Bell.
Modern-day internet slots don’t require you to insert your cash directly into a machine. And with software developers making new and exciting games every month, the possibilities are now endless. But we can still look back and thank the Liberty Bell and Sittman and Pitt’s gambling machine for the slot games we all know and love today.
Classic slots (3-Reels)
The original, and some would still argue the best, slot machine is the 3-reel slot. Back in the day, this was a physical machine, and one of the very first was named The Liberty Bell, which was invented in the USA around 1894. In fact, it’s thanks to this machine that we have all the traditional fruit symbols that are still used today.
Nowadays, the best slots UK games are much more sophisticated. And with online casino slots, developers aren’t restricted by having to build physical machines. But that hasn’t stopped the classic ‘fruit machine’ from remaining one of the world’s favourite types of slot game. Hence, you can still find tons of great 3-reel titles at all the best casinos online in the country.
Videoslots (5 reels)
With slots being so popular, it was only a matter of time before some clever designer upped the ante and added more reels to the classic game. Enter the 5-reel slot!
As you can imagine, 5 reels gives a game a lot more variety and fast-paced action. And, especially in the case of online video slots, the games coming out at the moment are visually incredible and offer exhilarating and immersive experiences. With 5 reels comes more chances to make winning combos. Plus, there’s more room to insert fun extras, like wilds and scatter symbols.
In fact, some games providers have added even more reels, with some titles having a whopping 7 reels! That being said, the classic 3-reel and 5-reel games are still the nation’s favourites.
RTP (Return to player) for slots explained
Return to player (RTP) refers to the amount of money a casino operator expects you to get back over a period of time when playing one game. This number is worked out as a percentage. So, for example, if a games says it has an RTP of 50%, this means you’re expected to get back 50p of each pound that you spend on the game. Luckily, slots RTP is much higher than 50%! In fact, some slots have an RTP of over 99%, so you have a much better chance of winning your money back.
Here at Gamble.xyz, we’re dedicated to bringing you the best games from the best online casinos. So always check our lists of trusted and reviewed sites, including where is offering the highest RTP slots in the country.
High RTP slots are not only great fun, but they also give you a better chance to get your money back over time. So where can you find these RTP slots games? Right here, of course.
Without further ado, let’s get into the best payout slots in the UK that you can find today.
Top 10 online slots in 2023 by RTP
So now you know all about RTP and how our experts find the best slots online. From the best casino operators to elite software providers, our experts have carefully compiled this top 10 list of the greatest slot games online that you can play in 2023.
From classic 3 reel fruit machines, to complex slots with masses of bonus functions and paylines, we’ve gone through them all. So let’s have a look at our top 10 selection of the most awesome slots with the very best RTP available to play now:
- Goblin’s Cave
- Ugga Bugga
- Mega Joker
- Jackpot 6000
- Uncharted Seas
- Blood Suckers
- Kings of Chicago
- Couch Potato
- Golden Colts
- Cluedo Spinning Detectives
Goblin’s Cave (Playtech) – RTP 99.32%
This fun slots game from Playtech has a whopping 99.32% RTP, so you know that you have a great chance to get back your money, and more! Goblin’s Cave is a dynamic, 3 reel slot game that’s easy to play. Dive into the goblin’s mysterious cave and try to snatch as much treasure as you can!
Cool features Of Goblin’s Cave:
- Amazing graphics
- Extra bonus rounds
- Ability to ‘hold’ reels for more fun and chances to win
Ugga Bugga (Playtech) – RTP 99.07%
Another classic from the masters at Playtech. Ugga Bugga is an adrenaline-fuelled jungle adventure. This 5 reel game creates multiple paylines and chances to win. And with great visuals and exciting music, it’s no wonder that Ugga Bugga is a firm favourite with slots lovers all across the UK.
Cool features of Ugga Bugga:
- Incredible RTP
- Multiplier of up to x1000
- Fun jungle-themed symbols and graphics
Mega Joker (Netent) – RTP 99%
A classic fruit machine-style game. Mega Joker gives you those Las Vegas vibes, as you take on this traditional slots game. With a massive RTP and multiple paylines, this traditional ‘fruity’ is more sophisticated than the typical machine you’d find at your local pub!
Cool features of Mega Joker:
- Fun, classic fruit machine layout
- Progressive jackpot
- Supermeter features with even more chances to win
Jackpot 6000 (Netent) – RTP 98.8%
Another fruit machine game, with a Vegas twist. Jackpot 6000 gives you loads of chances to win on this sleek but classic looking game. With bright symbols and great sound effects, you can have tons of fun on this 3 reel traditional slot machine game.
Cool features of Jackpot 6000:
- Amazing graphics
- Supermeter mode
- Heads or Tails feature with a 50/50 chance to win
Uncharted Seas (Thunderkick) – 98.5%
Step into the boots of Christopher Columbus now, and set sail across uncharted waters in this fun and exciting game. With its olde-world layout of ancient maps and symbols, you’ll feel like you’re on a real treasure hunt! Beat the sea creatures for your chance to win big on this high RTP low volatility slot game.
Cool features of Uncharted Seas:
- A massive 25 paylines
- Free spins
- Fun poker chip feature for more chances to win
Blood Suckers (Netent) – RTP 98%
This cool vampire themed game takes all the elements from the popular vampire and werewolf films and programs that are popular right now and puts them all into one place. Sexy nocturnal beings roam around this Victorian wonderland. And the game’s graphics are a mix between fine art paintings and animation. So much fun!
Cool features of Blood Suckers:
- 5 reels with 25 paylines
- High RTP and low volatility
- Free spins, scatter wins and vampire-slaying bonus round
Kings of Chicago (Netent) – RTP 97.8%
A unique game that combines gangsters, slots and poker! Kings of Chicago is a one-of-a-kind slot game where you’ll feel like a Mafia kingpin, controlling the streets of the Windy City with your tommy gun and flapper girl on your arm. With it’s black and white interface and fun themed symbols, it’s not hard to see why this game is so popular.
Cool features of Kings of Chicago:
- Playing cards replace classic slots symbols
- Joker card acts as wild multiplier for more chances to win
- Graphics and attention to detail are incredible
Couch Potato (Microgaming) – 97.43%
Back to basics now, with this classic 3 reel slot game. If you like your games fun and straightforward, then Couch Potato is the game for you! Classic symbols and an easy-to-use colourful interface makes Couch Potato one of the most effortless slots games to play.
Cool features of Couch Potato:
- Easy to play but very versatile
- Fun graphics and layout
- Classic format with lots of chances to win
Golden Colts (Play’n Go) – RTP 96.55%
Step back into the Wild West now, and feel like Clint Eastwood with this fun gun-slinging game. Golden Colts brings you stunning visuals and graphics. Wild, desolate stretches of American countryside make this game look like a classic Western film. And you can walk through the landscape feeling like the new Sheriff!
Cool features of Golden Colts:
- A mammoth 40 paylines
- Golden Colts bonus round for even more chances to win
- Amazing graphics and mobile-optimised gameplay
Cluedo Spinning Detectives (SG Interactive) – RTP 96%
We all remember the classic board game of Cluedo. And now you can be Professor Plum or Miss Scarlet on this fun and exciting slot game! The classic mansion serves as the backdrop to the game. And the symbols are a combo of the classic murder weapons we all know and love from the original board game. Set during the night, you really get the feel that you’re walking around the creep mansion looking for a murderer!
Cool features of Cluedo Spinning Detectives:
- 5 reels and a huge 40 paylines
- 5 different bonus rounds
- Unlock free spins bonus
Bonuses and promotions for online slots sites
As you probably already know, one of the best parts of finding a great new slots casino is the bonus deal that comes with it.
The best online slots UK sites all want you to play with them. And each one will offer an incredible bonus, to entice you in. So, what exactly are these bonuses? And which one is the right one for you?
Let’s find out!
Freespins no deposit
No deposit bonuses are incredibly popular with casino players, as they mean you can play games for free. ‘No deposit’ literally means you don’t have to make a deposit in order to get this bonus. So you’re effectively playing for free.
You can be offered either cash or slot machine spins as part of a no deposit bonus. And, needless to say, free spins no deposit deals are most popular with slots fans.
So, if you love slots and want to try out some of the best UK slots for free, then you should consider a free spins no deposit bonus. That said, don’t expect to pick up tons of bonus spins with this deal. Remember, you’re getting these spins for free. So, naturally, you’re only going to get a few. However, no deposit free spins are the perfect way to try out a new site and its games, without any financial risk on your part.
Deposit based freespins
Another great online slots bonus is free spins when you make a deposit. But why would you choose a deposit bonus over a no deposit bonus? The answer is simple! With a deposit bonus, you get a lot more free spins than if you choose a no deposit deal. And some sites give out well over a hundred free spins when you make a deposit with them.
And the best part is that the deposit amount isn’t huge. In fact, you can unlock tons of bonus spins with as little as £10 or £20, depending on the site.
Therefore, this type of bonus is better for people who are happy to make a small financial commitment. And who wants loads and loads of free spins!
Traditional casino bonus
While free spins are great for slots fans, they’re not the only way to play slots at an online casino. Traditional casino bonuses usually give you bonus cash to play with. And this cash can be used to buy spins. So, if you don’t see a spins-based bonus, don’t worry! You can still use your casino bonus to play the best online slots at these sites.
Typically, a classic casino bonus is a ‘match deposit’ bonus. And this is where the casino will match your deposit amount with a percentage. The UK average is 100% or 200%. Meaning that, if you were to put down £50 and pick up a 100% match deposit bonus, then you’d have £100 to play with in total.
Therefore, this type of bonus is best suited to players who are willing to make a larger deposit. As the more you put in, the more you get out. And using a great match deposit offer, you can get your hands on plenty of bonus cash, which can be used on slot games and many other titles, too.
If you can’t get enough of slot games, then it’s time to sign up for a slots tournament! All the top online slots UK providers offer regular slots competitions. And not only can you get your hands on thousands of spins, but you can also win some serious cash prizes.
How do slots tournaments work?
Slots tournaments are super fun, and very easy to get the hang of. Simply find out when your favourite slots online UK site is having its next tournament and sign up.
You’ll have to pay a small fee to enter. And you’ll be competing against other players from up and down the UK, and possibly other countries around the world too.
Once you enter, you’ll get a certain number of spins to use within a specific amount of time (e.g. 24 hours), during which time you have to win as many coins as possible. And that’s it! When the competition ends, the player with the highest number of coins wins. But be careful! If you run out of spins before your time is up, then you’re out.
Slots tournaments are perfect for people who adore slot games and who like playing for long periods. Plus, the top prizes are incredible! And there are also prizes for the second and third runner-up.
Progressive jackpots at top slots online
Progressive jackpot slot games are some of the most popular around. This is because some titles offer the chance to become a millionaire overnight! Progressives work by each player putting a small percentage of their stake into one giant prize pool with every spin. So the jackpot increases until somebody wins it. So, if nobody wins the top prize for a while, the jackpot keeps going, and can exceed a million pounds quite rapidly.
Some of the best casino slots that are progressive titles include Mega Moolah and Mega Fortune. And the latter was in the Guinness Book of World Records, when someone scooped a record-breaking jackpot of €17.8 million!
Finally, the great thing about progressives is that the pot starts to grow again from the moment it’s won. So there’s always an absolutely amazing prize waiting for you on a progressive jackpot slot game.
Mobile casino slots online
Mobile casinos are the latest technological trend to revolutionise the gambling industry. It’s now possible to get the same great experience that you’d normally have on a PC or laptop on your smartphone or tablet. And with mobile-optimised sites you get top-notch graphics, seamless gameplay and some of the most user-friendly interfaces on the market.
Mobile casinos are also great if you’re a slot fan. As all the best UK online slots have been fully optimised for the best gaming experience possible.
Finally, there are specific bonuses for mobile players available at some sites. These bonus deals are offered out as an incentive for you to try the mobile version of a site. Or if you download a casino’s app. So keep your eyes peeled for these types of deal!
Playing in your browser
One of the best ways to play UK slots online is by using your phone’s internet browser to access your favourite mobile-optimised casinos.
It won’t take up any of your internal memory, like apps do. And by saving your login information, you can be in your account and playing games within a minute.
Plus, you can pick up some great bonuses when you use a mobile-friendly site. So there’s never been a better time to start using your phone for your favourite slots.
Playing with a mobile app
Even quicker than your phone’s internet browser, a great casino app will give you direct access to all the best online slots in seconds. Super quick and easy to use, dedicated apps give you the perfect mobile gaming experience.
Plus, apps offer little extras, like push notifications. So that you know when a new game comes out straight away. As well as other additions you won’t get with a browser-based site.
If we had one complaint about apps though, it would be that they do take up a lot of memory on your device. Plus, they need regular updates. That being said, they’re by far the quickest and easiest way to play slots on the go.
What are low/high volatility slots?
When we talk about volatility in slots, we’re referring to the frequency with which a game pays out, as well as the size of the prizes.
Slot games are usually advertised as low, medium or high volatility. And they work like this:
- Low volatility: a game pays out frequently, but in small amounts
- Medium volatility: a game pays out sporadically, in decent amounts
- High volatility: a game pays out rarely, but it very high amounts
There isn’t one type of game that’s better than another. Some players love the thrill of chasing a big win on a highly volatile game, and others enjoy regular, small wins on a low volatility title. So which games you like comes down to personal preference.
That being said, titles with the biggest cash prizes tend to be highly volatile. So, if you’re after a massive cash injection, then you’re probably better off going for a high volatility slot.
However, if you love playing for longer periods of time, then perhaps a low/medium volatility slot is the one for you. As the small wins can accumulate to large prizes, and they will fund more and more spins along the way.
Important when choosing an online slots casino
So now we know all about slot games, tournaments, progressive titles and the top bonuses on the market for slots players. Now, let’s take a look at what you should think about the next time you’re looking for a great new slots casino.
Our experts have put together a simple checklist. So that you can find the best online slots providers in the UK.
Slots promotions and bonuses
First of all, our experts recommend looking at what type of bonus you can get your hands on at a fun new site. You already know that there are plenty of ways to play slots using free spins deals, or a match deposit bonus, so take this into account when shopping around.
Remember, welcome bonuses can be extremely generous. So don’t just go for the first one you see. Make sure you’re getting a great deal, with lots of free spins on and/or bonus cash to play slots with. And don’t forget to read the T&Cs attached. So that you can use your bonus properly and get the most out of it.
Things like wagering requirements and game weighting can affect your winnings. So it’s important to know exactly what’s required of you before you take on any bonus deal. Our experts recommend staying away from offers that have heavy wagering requirements attached. Especially if you only play slots occasionally. As these requirements can make it difficult to withdraw any real-money winnings.
Finally, make sure to look at other important terms, such as expiry dates. So that you don’t miss out on cashing out any of your winnings!
Next, we recommend looking at where a site gets its games. In the UK, we’re lucky enough to have access to the leading software developers in the world. And the best online slot sites will have a wide selection of amazing new slots from all these different providers.
Games companies like Novomatic, Playtech and Microgaming have been around for decades. And make some of the best-known classic titles, as well as incredible progressive jackpot games. And then there are companies like Thunderkick and Boomerang Studios, who have only been around for a few years, but who are bringing out the most cutting-edge slots and fresh ideas that we’ve seen in a long time.
Therefore, when you look for a fantastic slots website, you want a wide range of games from all these providers. So that you never miss out on a great new slots title again!
The next thing you should look for in any casino site is that it’s licensed and legal. If you’re playing on a UK site, then look for the UK Gambling Commission (UKGC) logo.
Every real-money site that operates in the UK is legally obligated to show the UKGC logo, as well as their licence number, on their website. So that it’s easy for players to see that the website has the correct credentials to operate in the UK.
So, if you can’t see the UKGC logo, then it’s possible the site you’re on isn’t licensed in the UK. And you should leave the site immediately.
Alternatively, you can simply select a slot provider from our lists of trusted and reviewed casinos. We only work with UK-licensed sites, so you never have to worry about landing on an unsafe site ever again.
When it comes to depositing and withdrawing at any casino, you want the most convenient option for you. There are lots of great payment platforms on the market, so the top slot sites in the UK will offer their players a wide range of options.
Our experts advise looking for sites that offer more than one way to pay. As you may want to deposit or withdraw using a different method from time to time.
Therefore, be on the lookout for sites that offer convenient and modern payment options, such as:
- Debit card: use your debit card for free deposits and withdrawals
- e-Wallet: make extra-safe deposits and withdrawals using a free e-Wallet account
- Prepaid debit cards: load your card with funds specifically for using at casino sites. Available through e-Wallet providers, and perfect for monitoring your spending
- Pay-by-mobile: use your mobile phone number, credit and/or end-of-month bill to deposit. Available through services like Boku, Payforit and direct from the casino
All of these payment methods have their own perks. So it’s a good idea to look for a site that offers lots of different ways to pay in and take out your winnings.
Just keep in mind that a lot of them come with small fees attached for moving your money around. And some services, like a lot of pay-by-mobile options, will only let you make deposits, but not withdrawals. So it’s important to do your own research into each one before using them. So that you don’t get any surprises!
As mentioned, mobile casinos now offer some of the best online slots experiences around. So, when you’re looking for a fantastic new site, make sure they also offer a great mobile-friendly casino as well.
The top sites in the UK will offer a dedicated app, that you can download directly to your phone. Or they’ll have a brilliant, fully-optimised site that can be accessed via your phone’s internet browser in seconds.
Either way, mobile-friendly slot sites mean that you can play your favourite games any time, any place.
Free slots games
There are lots of ways that you can play slots for free! Whether you want to try out new games that have just been released, or you want to practise your skills before taking on a highly volatile titles, there are a few different avenues to be explored with free slots.
Playing slots games in demo mode
First up, we have demo slots. ‘Demo’ is short for ‘demonstration’, so these versions are designed to be played by people who want to try a new game out.
Demo versions are exactly the same as their real-money counterparts. The only difference is, you can’t take out any winnings. But they’re the perfect ‘try before you buy’ slot. As, if you like the demo, then you can switch to the casino version and play for real money in an instant.
And the good news is that most games providers make a demo version of almost all of their games. The only exceptions tend to be progressive titles, as they work by players paying into a price pool. Therefore, they aren’t usually available to play in demo mode.
No deposit slots bonuses
Another way to play slots for free is via a great no deposit bonus. As we’ve seen, the best online slots sites will offer new players some incredible bonus deals. And by picking up a no deposit bonus, with either cash or free spins, you can play slots games without paying into the casino.
Plus, unlike demo versions, you can win real money prizes with your bonus. However, depending on the bonus you collect, you will only have a finite number of spins to use. But, if you end up loving a game that you’ve played with free spins, then you can always make the decision to continue playing and make a deposit with the site.
New top slots online in 2023
Here at Gamble.xyz, we adore slots! They’re fun, exciting and each one is totally different. And that’s why you can be sure to find the most up-to-date news and reviews on all the top new titles in 2023.
Our experts love it when a new slot is released. And they’re ready and waiting to put these new games through their paces, using their rigorous review process.
So, the next time you’re on the prowl for an amazing new slot experience, make sure you come to us! We’ll keep you posted about every new title from the top software developers on the planet.
Featured slots game providers
Online gaming has seen many smaller casinos come and go over the years and the same can be said for software providers. It’s a tough industry to break into for anybody. Competition is fierce and those without a watertight business model fall by the wayside.
Today, the industry finds itself in an interesting moment where there’s a huge opportunity for growth. There are several big names that have made it all the way since casinos first went online 25 years ago and also some smaller independent studios who are proving that there’s still room for newcomers.
For more than two decades, NetEnt has been providing some of the most popular slots to casino sites across the globe. They focus on engaging games with incredible graphics and gameplay to create an immersive experience, which is much more than simply gambling. Starburst has been one of their most popular titles along with Gonzo’s Quest. The arrival of their new ‘Rome – The Golden Age’ slot is eagerly anticipated this year.
Playtech is one of the biggest software providers in the online gambling industry. They claim to be the largest casino software provider listed on the London Stock Exchange, which does go to show that they are certainly a force to be reckoned with in this arena. Their games have been entertaining the masses since the turn of the century, and they have grown in strength and statute during that time. Titles such as Age of The Gods and Batman Begins were both from this studio.
Microgaming has been around since the idea of online gambling was first thought up. They created their famous Gaming Club, which many believe to be the first online casino, in the mid-90s. Over the last 20 years, they have designed some hugely successful slots. They have constantly pushed the boundaries over the years, and are at the cutting edge of many new introductions to the sector. Back in 2006, they brought out their incredibly popular Mega Moolah progressive slot that has gradually turned into an entire range of machines all linked together to bring punters some of the biggest jackpots imaginable.
The Novomatic brand started out life in the early 80s as a physical slot machine manufacturer. Their products can be found all over the world and some say that they are now the largest in the business. They came a little later to the online party —so to speak— when they bought Greentube Internet Entertainment Solutions about 10 years ago. They are now highly regarded in the industry and players will often seek out their games.
Play’n go’s software has worked itself into a nice little niche in the gaming world. Their Omny-Channel Magic product means that a player’s game progress can be transferred through both digital and land-based casino devices instantly. A profile system stores your data and lets you enjoy the same gaming experience wherever you are. They have also created some amazing slots including The Faces of Freya and Thunderscreech.
SG has been involved in all areas of the casino business over the years. From lotteries to slot machines, there’s not much that they haven’t done. Several smaller brands have been taken under their wing giving them the ability to have a huge influence in every aspect of the gambling world.
This small Swedish studio has built itself a good reputation for breaking away from the traditional. Where many slots follow the same pattern, Thunderkick games add their own take on how things should look. Have a few spins on their fabulous game Esqueleto Explosivo and you’ll see how they’ve done it. Not only have they created an amazing graphical display with skulls flying out of the screen rather than simply spinning reels, but they have also introduced a ton of innovative ways to multiply bonuses and enjoy different types of features.
If you need a little more info, then look no further!