Best Slot Games

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Best Online Slot Games in the UK

Online slot games are the most popular casino games with players. Because of this, you can find thousands of slot games at countless online casinos. However, if you’re looking to play the best slot games at the best slot sites in the UK, then you’ve come to the right place.

All the online slot games we’ve recommended offer outstanding graphics, high payouts, and stand-out features such as the Megaways mechanic. 

10 Best Slot Games - Gambling.com Review

Welcome to our list of the top 10 best slot games to play in the UK. This list features the best slot games for winning real money in the UK. Slots are among the most played games at online casinos, and they are constantly evolving. Gone are the days of simple, basic 3-white reels; now, we have thrilling games with fun themes, buzzing music, flashing lights, and huge payouts.

The gameplay has also been modernised with spins and bonus rounds becoming more interactive, involving the player like never before. Read on to find top 10 slots games according to our slot expert, and why you should check them out now.

1. Double Bubble

Double Bubble is a classic game with traditional symbols and simple graphics, but it is certainly not a game to scoff at or take for granted. There are no free spins, but there is a hefty jackpot. Land 5 Double Bubble logos and this will give you 20,000x your bet!

You could also win 500x your stake if you land 5 gold bells, super sevens, pink single BAR, blue double BAR or green double BAR. That is not all - there are also 2 bonus games - Bubble Pop Bonus and Bubble Line Bonus. Both games will give you an opportunity to win multiplier rewards.

If you want to play a straightforward game without any distractions while still giving you the chance to experience multiple wins, then the Double Bubble slot is the game for you. This is a medium volatility slot with a good RTP of 96.02%. Get to popping some bubbles at our recommended slot sites today.

Software Provider
RTP
96.02%
Volatility
Medium
Maximum win
£100,000
Minimum Bet
0.10

2. Starburst

No best slot games list would be complete without Starburst. It has been over a decade since NetEnt released this classic game, yet it has consistently remained the most popular online slot.

With its simple design and rewarding payouts, it is no wonder that Starburst is such a hit with both new and experienced players. Like the gift that keeps on giving, Starburst is a low volatile slot, meaning that you get more frequent wins. Nevertheless, you can still win up to an astonishing 50,000x your bet. Just in case that wasn’t enough to cement Starburst in our #2 spot, the slot also has a Win Both Ways feature and a Starburst Wild symbol to help you grab even bigger wins.

Reach for the stars and play Starburst at any of the best online casino UK sites with the best slot games today!

Software Provider
RTP
96.09%
Volatility
Low
Maximum Win
50000
The Welcome Bonus is only available to newly registered players who make a minimum initial deposit of £10. The welcome offer can be activated only once, when making your first deposit. In order to receive the maximum of £ 200 bonus, you will need to wager an amount equal to 35 times the value of your first initial deposit within 60 calendar days from the date on which the Welcome Bonus option has been activated under the 'My Bonuses' section of your account.. Full Terms Apply.

3. Book of Dead

The prequel to the Legacy of Dead slot, Book of Dead by Play’n GO, takes you to ancient Egypt and offers many ways to boost your chances of finding treasure. Although it’s been a few years since it has come out, this slot has stood the test of time, and with good reason. When the book symbol lands in a minimum of 3 places is when the free games start. A symbol is selected at random and this will expand across any reel it lands on, meaning you receive a payout on any win. The symbol expansion takes place afterwards, getting you even more wins if new combinations are created.

Excitingly, Play’n GO also included a Gamble option, giving you the opportunity to double your win if you correctly guess the colour of a face-down playing card, or if you’re feeling particularly daring, to quadruple your win by picking the correct suit. Read our expert’s full review of Book of Dead to find out more about what makes this game one of the best slots from Play’n GO.

4. Big Bass Bonanza

Big Bass Bonanza by Pragmatic Play just had to be in our top three due to its retro style, innovative features, and its wide range of stakes making it accessible to everyone!

Although the base games are pretty simple, the slot really comes to life in the free spins round. Landing 3, 4 or 5 scatter symbols can get you up to 20 free spins. If 4 fishermen appear during this round, you can get a further 10 free spins. There's also a Money Collect symbol (the bass), and all the fish you collect in this time will pay double. Land 4 more fishermen, and the fish will triple in value!

Big Bass Bonanza is a highly volatile slot but with high risks come great rewards. The maximum win at the highest stake comes out at more than half a million and the average RTP percentage is a great 96.71%.

5. Rainbow Riches

Playing Rainbow Riches, no one would ever know that Barcrest released this game 14 years ago. This is partly due to the stunning visuals, but also due to the great number of features this slot offers.

If you find yourself on the Road to Riches, a leprechaun will spin a wheel and you move along the road, collecting win multipliers as you go along. Landing three wishing wells will trigger a different game where you can win 500x your stake if you choose the correct well. 

The Rainbow Riches Pots of Gold is yet another separate game within the slot. You will see a leprechaun surrounded by 12 pots of gold, silver and bronze. They each carry a different value and will spin around the leprechaun until one stops next to a pointer. Just like in the Wishing Well game, you can win a maximum of 500x your stake in this round.

We've gone ahead and chosen the best online casino where you can play this game. You'll even get 30 free spins on the game after your first deposit, so what are you waiting for?

Software Provider
RTP
95.00%
Volatility
Medium
Maximum win
£250,000
The Welcome Bonus is only available to newly registered players who make a minimum initial deposit of £10. The welcome offer can be activated only once, when making your first deposit. In order to receive the maximum of £ 200 bonus, you will need to wager an amount equal to 35 times the value of your first initial deposit within 60 calendar days from the date on which the Welcome Bonus option has been activated under the 'My Bonuses' section of your account.. Full Terms Apply.

6. Big Bass Splash

Pragmatic Play and partner Reel Kingdom's Big Bass Splash has been a huge hit with online slot players. With bright and colourful graphics, 5 reels, 10 paylines, and lots of fishing-themed symbols on the grid, it is no wonder why.

Players will be greeted by bold playing card symbols, a tackle box, rod & reel, a monster truck wading through the water, and even some grinning fishermen in the bonus rounds. The whole game sits within shallow waters, where animated bubbles mark out the reels, and seaweed waves in the background. 

Although Big Bass Splash has an excellent RTP 96.71%, you have to watch out as this game has a rather high volatility, so you could see several dead spins between wins. However, with great risks come even greater rewards. Big Bass Splash allows you to hit a maximum of 5,000x and due to the 250.000 stake, players can collect up to 1,250,000.00 before the feature ends.

Dip your toes from just 0.10 per spin when you play this fun, colourful game at our approved new online casinos.

Software Provider
RTP
96.71%
Volatility
High
Maximum Win
1250000
18+. UK & ROI. New customers only. Deposit & spend £10 to get a £20 Slots Bonus (30x wagering selected games, claim and use within 30 days) & 100 Free Spins (£0.10 each, selected games, use within 7 days). Restrictions and T&Cs apply.

7. Fishin’ Frenzy Big Catch Jackpot King

Deep dive into Blueprint Gaming’s Fishin’ Frenzy Big Catch Jackpot King online slot, which is compatible on both your mobile and desktop using HTML5 technology. 

This fishing themed, 5 reel, 10 paylines online slot game is a big hit with players, and for a good reason. With a medium volatility rate, players can enjoy this underwater slot machine game from only a 0.10p stake, going all the way up to 100 if you're feeling a bit more daring. 

Blueprint Gaming did not cut any corners when it came to their featured symbols. These include low-paying and high paying symbols such as a seagull, fishing rod and a box of bait. Land three matching symbols and you’re in to form a winning combination. When players collect enough fisherman symbols, the game's ‘big catch’ is activated. Every fish that you land on the reels gives you a reward of 50x your stake! 

Software Provider
RTP
93.35%
Volatility
Medium
Autoplay Option
Yes
Minimum Bet
0.10
Fishin' Frenzy The Big Catch Jackpot King

8. Secrets of the Phoenix

Gamesys has hit it out of the park with their Secrets of the Phoenix online slot game. With 5 reels and 25 paylines, players can play this Aztec-inspired slot game for only £0.25 per spin and all the way up to £200. With an RTP of 94.97%, with a medium volatility, players can walk away with up to 500x their stake, with even bigger payouts from the bonus features. 

Land a winning combination by landing 3 or more matching symbols on a payline, from left to right. Speaking of symbols, Secrets of  the Phoenix have really outdone themselves in that regard. Their low-paying symbols look as though they have just been taken straight from an ancient temple, with their high-paying symbols being that of a dragon, tiger or eagle.

Venture into the south of America and play The Secrets Of the Phoenix at the best online casinos today.

Software Provider
RTP
94.97%
Volatility
Medium
Autoplay Option
Yes
Minimum Bet
0.10
Secrets of the Phoenix

9. Monopoly Paradise Mansion

Gamesys steal another spot on our top 10 slot list with Monopoly Paradise Mansion. Released in 2015, this legendary board game-inspired slot game has a RTP of 96.29% with a medium volatility and is mobile friendly so you can join in on the fun from anywhere. 

Players can play this 5 reel, 20 paylines online slot from as little as £0.20 up to £40 per spin so this game is sure to fit a lot of players' budgets. Players can also walk away with up to 10,000x their stake at the Monopoly Paradise Mansion. 

Although Monopoly Paradise Mansion does not have a progressive jackpot, with bonus games, multipliers and free spins, you can be sure you will be getting your money’s worth with this online slot game. 

Take a walk down memory lane and play Monopoly Paradise Mansion video slot at the best online casinos today.

Software Provider
RTP
96.29%
Volatility
Medium
Autoplay Option
Yes
Minimum Bet
0.10
Monopoly Paradise Mansion

10. Fishin' Frenzy Megaways

Rounding off our list at #10 is another game from the Fishin' Frenzy series. For this slot, Blueprint Gaming has added the Megaways mechanics, bringing the ways to win up to 15,625.

The setting of Fishin' Frenzy Megaways is similar to the other slots in the series but you will still find some new twists. A smiling fisherman acts as a wild symbol and can act as any other symbol bar the sailing boat. If the boat lands in 3, 4, 5 or 6 spots, you will be awarded up to 25 free spins. In the bonus round, the fisherman can help you catch some pretty big wins when he catches some fish. The fish comes in 7 different sizes and each size carries a money value that ranges from 2x to 50x your bet. It is also possible to multiply your wins if more than one fisherman appear at the same time.

Enjoy fishing for prizes today at the recommended casino below!

Software Provider
RTP
96.10%
Volatility
High
Autoplay Option
Yes
Minimum Bet
0.10

Recommended Slot Games

Playing Slots Online

Brick-and-mortar casinos just wouldn't be the same without the electric buzzing and beeping of slot machines. Winners jump for joy as their winning coins rattle against the payout tin and the whole thing has a certain old-school charm about it. But whether you are young or old, playing slot games brings fun, excitement and of course chances to win great prizes regardless of your age and gender.

Thanks to the best online slots, you can now spin the reels at any time and from anywhere. There is no longer the need to book a trip and wait for your next holiday to go and spin the reels at a land-based casino. The best casino slots in the world are now available on your computer or mobile device. So you can play from your couch in the evening, from the office during a lunch break, and even on the train on your way home.

If are an experienced slots player that is familiar with the gameplay and settings, you will find in our Gambling.com guide insights that will take your slot experience to a whole new level. If you are new to slots, our guide will teach you everything you need to know in order to jump into the exciting world of online slot games.

Start today with online slots and play on the device of your choice. You just need to sign up with an online casino and verify your account, and thousands of the world’s greatest slot games will be ready and waiting for you 24/7 no matter where you are. Online slots are simple, convenient, mobile friendly, and give you the chance to win real money. No wonder online slot games are increasing in popularity with players of all ages and experience levels across the UK.

How We Review The Best Slots Games

Our slot experts at Gambling.com review new slot games every week. They have years of experience having played the best online slot games in the UK. Although every slot provides an entirely different gameplay experience, we put each game through a rigorous review process that allows us to bring you objective conclusions. We also add to our reviews the subjective opinions of our experts and their likes and dislikes of each casino slot. Here are a few areas we look into when writing our reviews.

Most Common Types of Online Slot Games

Slot games have come a long way from the early day fruit machines. The move from slot machine cabinets sitting on a land-based casino floor, to online slots on a website or app continues to push change and innovation. Beyond the benefit of playing anywhere and at any time, now players can also enjoy many different online casino slot options. For example: 

Online video slots allow for a diverse range of gameplay. From games that imitate classic slots, to more hi-tech video slots that offer an immersive experience. Players can now enjoy titles that boast 3D graphics, state-of-the-art animation and cinematic sounds. Whereas classic slots often feature recognisable symbols from fruit machines, video slots mostly create their own symbols and icons based on a game theme and storyline.

Classic slots are more traditional and usually offer 3 or 5 reels and follow the popular 25-playline structure with some variations. Video slots tend to come with 5, 7 and sometimes 9 reels. They offer multiple paylines, bonus rounds, and players can enjoy 243, and in newer slots even 1024 ways to win. Many video slot developers license the rights to use of characters from hit movies, popular TV shows, and even comic books. There are also many slots with epic themes and storylines, for example the Age of Gods game series brought by leading software developer Playtech. Another major slots game supplier is Swedish developer NetEnt that produced some of the most popular slot titles in the industry.

Most casino slots are played individually where the prizes depend solely on the player’s bets and spins. A progressive slot is different, featuring a jackpot that grows with every bet that any player makes on that slot. Although the odds of winning a jackpot are slim, the payouts are epic and can get to millions of pounds.

Another innovative type of slot that is taking the UK by storm is the Megaways slot. Different from traditional slot games that have a fixed number of reels and paylines, Megaways slots have a random reel modifier that changes the number of symbols and the layout with every spin – providing hundreds of thousands of possible ways to win.

How Slot Games Work Online

Understanding the features, game mechanics and logic of online slot machines will help you create your own slot strategy  and better prepare for success when spinning those digital reels. Read our Gambling.com guide further to better understand the ins and outs of online slot machines, and for a hands-on learning experience check free slots reviews and try them out.

Understanding Slot Reels

The virtual "reels" of online slot games are generated by the software program that randomly delivers the symbols with each spin. The symbols of online slots can appear in any random order.

Online Slots UK RNG

Similar to land-based casinos, online slot machines have a Random Number Generator (RNG) which as the name suggests, makes sure that the symbols on the reels land in random positions with every spin. All the online casinos we recommend on Gambling.com are licensed by the UK Gambling Commission (UKGC), which requires the RNG to be certified and tested regularly. So you can be sure that no casino slot we feature on our site is rigged and the symbols always land in a random order.

What are Paylines?

Being one of the core elements of any slot machine, paylines mark the all the possible winning symbol combinations. The number of paylines on a casino slot will determine how many ways you can win while spinning the reels. You can choose how many lines you wish to play and in which combinations, as well as decide how much money to bet on each line. For example, if a slot offers 25 paylines, you can choose to bet on 10 and select any combination you want like paylines 1-5 and 14-19, etc.

How Many Reels and Paylines Do Online Slots UK Have?

The most basic slot games usually have 3 reels and offer just one payline that typically goes through the centre of the reels. But technology has come a long way, and today’s game designers offer online video slots that feature 5, 7 or 9 reels and hundreds of paylines. Some UK online slot games feature 243 ways to win, while there are even slots with 1024 possible winning combinations.

5-reel slot games have become the standard for many online casino slots, while a game can offer anywhere between one to hundreds of paylines. The innovation and creativity of online slot designers recently brought slots with 1024 ways to win where, instead of traditional paylines, wins are given for any left or right-aligned symbol combination that lands on the reels.

How Much Can You Bet On an Online Slot Game?

The amount you can bet on a slot game will depend on its min/max bet limits, number of paylines and other game rules. You must bet at least the minimum and remember before betting to check the paytable and understand how winning combinations occur. In standard slot games, the winning combinations read from left to right, but there are many new and innovative slots that award wins for symbols clustered or grouped in multiple directions.

Every wager you make will deduct coins from your balance. And for every payline you select, you will need to make an extra bet. The minimum bet is 1 coin, so if you would like to bet on a slot with 25 playlines for example, you will need to bet a minimum of 25 coins. The values of coins changes from one slot game to another. While some slots allow you to place a few pence per bet, others will require £1 per for each wager. Payouts can range from 10x to 2000x. The ‘x’ figure is the number of times your single line bet will be multiplied. Match 3, 4 or 5 symbols and you’re a winner.

Slot Games Bonus Features

Traditional slot machines used to offer very limited features. You had to spin 3 reels with a handful of symbols on each reel, and if the symbols lined up in certain combinations, you would win. In today’s online slots, the reels and symbols are just the foundation for many more bonus features and special symbols that beyond making gameplay a lot more exciting, give you many more chances to win. Below is a list of just some of the features your may find:

Mobile Slot Games

With mobile gambling becoming increasingly popular and common in the UK, all the new online slots are coded in HTML5 technology which makes them optimised for any mobile-browser device. Nowadays, most software developers implement the mobile-first approach when building new online slot games. So nearly all the new casino slot releases are developed with mobile-device players in mind, thus including game features and settings that make for an immersive mobile gameplay experience. But don’t worry if you are into online slot classics, as most of the popular older games have been updated and made available on mobile casino sites too. Most online slots are available for instant play using any mobile device browser, and many casinos nowadays also offer slots on mobile apps available on Android, iOS and Windows Phone versions.

Slot Games RTP (Return to Player)

If you spend money to place a bet on a slot machine, you probably want to know how much money you could potentially win back. Of course all slot machine payouts are random and every player has great wins and poor losing streaks. But although it may sound confusing, a slot’s expected return is based on a very precise mathematical model to determine the payount. The Return to Player, known as RTP, is the measure of how much money is returned to players over time as a percentage of the total wagers of all players.

So if for example the RTP of a certain slot is 96%, it will pay winnings £96 for every £100 wagered by all players. Note however that this is the statistical rate of payout over the long run and given that wins are completely random, it does not mean that any one player is expected to win or be paid back. Following the example above, one player may wager £100 and lose the entire sum, whilst another can wager a few pounds and win a jackpot – this is actually what makes casino slots so exciting.

Online casino slots are known to have higher RTPs than land-based ones, probably due to the fact that online casinos incur less expenses on rent, equipment, staff, etc. which leaves more of a profit margin that can be paid back to players. Most online slot games offer RTPs higher than 96%, but there are some with even higher returns such as Rainbow Riches Pick ‘N Mix by Barcrest with 98%, Mega Joker by NetEnt with 99%, and Ugga Bgga by Playtech with an RTP of 99.07%.

Free Slot Games Online

Many websites offer the best casino slot games in demo mode, where you can play for free and try slots without spending your own money. This is a great way to test different slots and understand the game theme, design, sounds and features before playing for real money. Beyond getting an initial feel for the slot, many experienced players play free slot games in demo mode in order to learn the bonus features, understand the RTP and volatility, betting limits and devise their slot game strategy before placing bets for real money. Note that due to UKGC regulations, UK players can access and play casino slots for free only once they sign up and verify their account with the casino.

Slot Games with No Deposit

UK casinos provide generous bonuses to lure new players to sign up as well as reward the loyalty of their existing punters. Promotions range from different deposit match bonuses, free spins and attractive no deposit bonuses that allow you to play the best slot games for free. No deposit bonuses may include bonus money added to your casino account when you sign up, free spins awarded on featured slots, and in some cases a combination of both. In addition to all the advantages of playing slots for free on demo mode, no deposit bonuses give you a chance to take home real money with every winning spin. But in most cases you will still need to deposit and complete wagering requirements before you can withdraw your winnings.

New Slot Games Online

New and exciting slot games are being released in the UK every week, and our slots experts at Gambling.com are in touch with all the major software developers to get you the first glance at the newest casino slots as soon as they are ready. Our game section has a search functionality that lets you find the newest slots based on software provider, game type, slot features and even slot name. The newly-released slots will always appear on the top of the page, so it’s easy for you to stay up to date. We constantly update our new slots page with new and innovative online slot games, so make sure you bookmark our page and check it regularly.

Advantages of Playing The Best Online Slot Games

Beyond the obvious advantages of playing the best slots online which has to do with the convenience and ability to play from anywhere, there are a few more benefits that make online slots grow in popularity with gamblers in the UK and beyond.

Slot Game Variety

Higher RTP

More Innovation

More Money to Wager

Quiet Game Settings

Play Slots on Your Mobile

Common Misconceptions about Casino Slots Online

There are myths and rumours about online slot machines that come from common suspicions that people have about online activities. Are online slots programmed to pay out at specific times? Do they pay out less after a player wins the jackpot? Are online slot games rigged and fraudulent? Let’s have a look at some these misconceptions.

Final Words on Online Slots

Now that you know so much about slots, why not try to spin the reels and dive into the exciting world of UK slots online? While at it, don’t forget to claim the great bonuses available to players that come through Gambling.com!

FAQ

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