Best Slot Games to Play Online in the UK

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If you compare the best slot games list from 10 years ago to the current list below, you’ll notice that both feature a game provider who dominates with a number of titles.

The once-mighty NetEnt was a powerhouse who, from 2010-2015, churned out hit after hit with ground-breaking slots such as Gonzo’s Quest, Twin Spin and Dead or Alive

Then around 2016, along came a young upstart studio by the name of Pragmatic Play. While it was true to say some of their earliest releases are nothing to write home about, they soon found their groove - and the rest is history.

Commanding an incredible 9 positions in the top 20 best slot games to play at slot sites in the UK, Pragmatic Play have firmly established their position as players’ #1 game provider.

1. Big Bass Bonanza (Pragmatic Play)

Proving that you can take any subject and create a successful slot by applying a little genius, Big Bass Bonanza became the launching pad for an extremely successful series of ‘Big Bass’ slots based around fishing.

Technically, Reel Time Gaming’s Fishin’ Frenzy was the first such slot having taken up residence on casino gaming floors around the world some years prior. Although a popular game in itself, it’s Big Bass Bonanza that has stolen the limelight with clean graphics, immersive sound effects and engaging game play that keeps players coming back for more.

The feature bonus is where the ‘reel’ fun starts - land 3, 4 or 5 Scatter symbols to receive 10, 15 or 20 free spins respectively. During the free spins, you’ll bank any cash prizes that land if accompanied by the fisherman collector symbol. 

The free spins bonus also offers a trail through which you progress with each Fisherman Wild symbol that lands. Every 4 steps awards a retrigger of 10 more free spins with an increased multiplier of up to 10x.

Software Provider
RTP
96.71%
Maximum win
£525,000

2. Big Bass Splash (Pragmatic Play)

Hot off the heels of Big Bass Bonanza’s success comes Big Bass Splash which follows the familiar format, but with a number of significant upgrades.

First off, the theme is given a little makeover with the bearded fisherman now taking on a redneck persona. Driving a monster truck, our redneck fisherman opts for a less eloquent method of catching fish by firing launching dynamite to blow them out of the water

The updated game is given some radical features including the random Bazooka feature plus a respin opportunity to hook a 3rd Scatter when only two drop.

Once the feature bonus is triggered by landing 3 Scatter symbols, you’ll be given the chance to net yourself additional features including More Fish, More Fishermen, +2 Free Spins, Start at Level 2 and More Dynamite, Hooks and Bazookas. 

Needless to say, the more of these you manage to collect, the tastier the bonus is likely to be!

Software Provider
RTP
96.71%
Maximum win
£1,250,000

3. Gates of Olympus (Pragmatic Play)

Ancient Greek-themed slots will never go out of fashion, and Gates of Olympus remains the most popular of all in this genre.

With similar game mechanics to Sweet Bonanza (another Pragmatic Play slot at #5), Gates of Olympus offers cascading symbols and Anywhere Pays when matching at least 8 symbols. The Tumble Feature removes any winning combinations while the remaining symbols drop down. The empty spaces are then replaced with new tiles which can include win multipliers of up to 500x.

It’s entirely possible to hit many multipliers in a single spin, which can generate truly epic payouts of up to 5,000x your stake.

The Mount Olympus Free Spins Feature awards a minimum of 15 free spins with retriggers achieved by landing just 3 Scatters during the bonus.

Another interesting feature is the Ante Bet option where you can increase the chance of spinning 3 Scatters by increasing your base game bet by 25%.

Software Provider
RTP
96.50%
Maximum win
£500,000

4. Starburst (NetEnt)

What can be said about the most iconic online slot of all time that hasn’t been said before? NetEnt’s Starburst is where many online slot players first cut their teeth. 

Most of the best UK casinos award free spins on Starburst as part of their welcome bonus offers. This all-time classic is simple, yet engaging with mesmerising graphics, animation and ethereal sound effects.

There is no complicated bonus round - the Starburst Wild symbol is present on reels 2, 3 and 4. When it lands, it expands to cover the entire reel and awards a respin. Landing an additional Starburst Wild awards another respin, but now you have two expanded Starburst Wilds which is where the big wins can occur.

The reel symbols consist mainly of precious gems, but it’s the Red 7s and Gold Bar which top the pay table. With 10 fixed paylines paying both ways, it’s not hard to see how Starburst has remained in the Top 10 for over a decade.

Software Provider
RTP
96.09%
Maximum win
£50,000

5. Sweet Bonanza (Pragmatic Play)

Sweet Bonanza offers the same game mechanics as its more popular clone, Gates of Olympus

Featuring the same cascading reel symbols along with the Tumble Feature, it’s mainly the sickly-sweet candy theme and 21,100x Maximum Win that sets them apart.

Reel symbols consist of fruit and candy, set upon a sugar-coated backdrop that could be a scene from the next Wonka film.

The Free Spins Feature awards 10 free spins for landing 3 Scatters. Special reels are in play during the free spins which include multipliers of up to 100x. At the end of each winning spin, all the multipliers are added together and applied to the total win for that spin.

Just like Gates of Olympus, Sweet Bonanza allows the player to increase their chances of landing Scatters by applying the Ante Bet for an additional 25% of their bet.

Software Provider
RTP
96.48%
Maximum win
£2,110,000

6. Gold Blitz (Fortune Factory Studios)

If you like high-energy slots with plenty of flashing lights and thunderous explosions, then Gold Blitz from Fortune Factory Studios is right up your street.

Random cash values appear amongst the reel symbols which are collected when the Blitz symbol lands on reels 1 or 6. The Blitz symbol also collects any of the three jackpots - Minor, Major or Mega.

Land 3 or more Bonus symbols to trigger the Bonus Choice. Here you can choose between up to 30 Free Spins with multiplier Wilds or up to 7 Gold Blitz Super Spins - the latter of which will guarantee a Gold Blitz cash collector symbol on the first reel with every spin.

This supercharged slot offers 4,096 ways to pay across 6 reels with 4 rows, and is not for the faint hearted - it’s classed as highly volatile with a 5,000x Maximum Win.

7. 9 Pots of Gold (Gameburger Studios)

Surprisingly, for such a popular genre, 9 Pots of Gold is only one of two Irish-themed slots in our list - of which both are from Gameburger Studios.

With reel symbols featuring Leprechauns, harps, 4-leaf clovers and pots ‘o gold at the end of the rainbow, this wonderfully crafted slot manages to blend everything considered ‘Lucky Irish’ into one game

Landing 3 or more Pot Scatters on any reels awards a climb of the ladder and a cash prize of up to 2,000x your stake. 

The Free Spin Wheel is awarded when you land 3 or more Free Spin symbols. Each wedge on the Free Spin Wheel contains a number of free spins plus a multiplier, with up to 30 free spins and a 3x multiplier available.

Naturally, the melodic and foot-tapping background music is courtesy of a fiddle, which is punctuated by the jingling of coins falling upon a win.

8. Gold Blitz Extreme (Fortune Factory Studios)

Just when you think it couldn’t get any more glitzier (or should that be ‘blitz-ier?), then along comes Gold Blitz Extreme.

Not content with the huge success of the original Gold Blitz slot released in late 2022, Fortune Factory followed it up with a highly-anticipated sequel which offers even more high-voltage action.

Gold Blitz Extreme maintains all the popular elements of the original slot but takes it one step further with a host of exciting new features. One of which is when players land a cash symbol without a Blitz symbol in view - in this instance, a token is added to a persistent pot which increases the Rising Rewards jackpots. Collecting tokens also increases the chances of triggering the jackpot.

The Blitz game mechanic has proven to be such a big hit for Fortune Factory Studios, that they’ve added it to some of their other games including Fishin’ Pots of Gold Blitz and Blazing Bison Gold Blitz.

9. Mining Pots of Gold (Gameburger Studios)

Tapping in on a popular slot theme of gold mining, Gameburger Studios have merged it with their Lucky Irish Pots of Gold and introduced a chirpy leprechaun character called Flynn.

The playful Flynn will guide you through the game where the ultimate goal is to unlock the pot of gold sitting atop a stack of dynamite.

The Bonus Game consists of 3 carts - Bonus Spins, Bonus Multiplier and Bonus Prizes. Landing gem symbols will upgrade each cart’s value which will be awarded when you collect enough dynamite to ignite the Mining Bonus Feature.

Pick a four leaf clover to reveal a cash prize in the Mining Bonus, which will have the Bonus Multiplier applied. Clear the board and you’ll be awarded with the top prize in the Bonus Tower of 2,000x.

But that’s not the biggest payout available - A Wild Blackout is achieved when the Flynn Wild symbols cover all reels and awards a whopping 4,000x your bet.

10. Chilli Heat (Pragmatic Play)

Chilli Heat is unusually of low volatility - well, unusual for Pragmatic Play, that is, who specialise in ultra-high volatility slots which are favoured by streamers due to their big win potential.

Tequila, Tabasco sauce and Mariachi band members make up the reel symbols on this delightful Mexican-themed slot.

Money Bag symbols are present on all reels and are valued at between 1x and 100x your total bet. Landing 6 or more Money Bags triggers the Money Respin Feature where the bags remain sticky and you’ll receive 3 spins in which to add more Money Bags. Each success will reset the free spin counter back to 3.

Only higher value symbols are present throughout the Free Spins Feature which is awarded when at least 3 scorching sun scatters are landed. Additional free spins can be achieved every time 3 more scatters are spun.

11. Queen of the Pyramids Mega Cash Collect (Playtech)

Playtech have added their popular Cash Collect game mechanic to another great slot, this time themed around ancient Egypt which is known for its rich history and hidden treasures.

Queen of the Pyramids features vibrant graphics and immersive sounds that are typical of that era. The game screen consists of a 3-4-5-4-3 reel configuration with the Cash Collect symbol appearing on the outermost reels only. 

The Cash Collect symbol performs multiple functions as it collects all coins within view and activates the Free Games if accompanied by a +3 (spins) symbol. Additionally, it can unlock extra reels with the special key symbol.

The Dropping Wilds feature adds to the tension, along with the Cash Spreader and Sticky Cash symbols which all bring the potential for huge wins. There are 4 jackpot prizes also waiting to be won including the Mini, Minor, Major and Grand. 

There is so much going on within this great slot that Queen of the Pyramids Mega Cash Collect is best explored by playing, rather than reading.

12. Fluffy Favourites (Eyecon)

Although not personally fond of this classic slot from Eyecon, the numbers don’t lie.

Fluffy Favourites is somewhat long in the tooth and it shows. The artwork, sound effects and bonus round are as basic as you can get - even by 2016 standards. But it’s probably this simplicity that gives it the charm that appeals to many slot players.

Reel symbols consist of cuddly toy type characters, particularly those that you’ll find in the claw machines found at the fair. Which is exactly why the Claw Scatter symbols trigger the Toybox Pick bonus where you’ll receive up to 5 grabs at claiming a prize. 

Each successful pick reveals a random bet multiplier of up to 100x your bet. Up to 25 free games can be awarded when landing the pink elephant Wild symbol which also doubles any win.

Once you can get past the artwork and 8 bit sounds, the charm does eventually start to set in.

13. Sahara Riches: Cash Collect  (Playtech)

Sahara Riches: Cash Collect is another in the Playtech franchise which offers the popular Cash Collect game mechanic.

With an Arabian-inspired theme, Sahara Riches really captures the ambiance with a soothing soundtrack that you’d expect to hear in such a majestic setting.

The premium reel symbols consist of a treasure chest, camel, perfume bottle and a traditional Jambiya dagger with a mysterious Arab lady as the only Wild.

The Cash Collect symbol appears only on reel 5 and collects all coins, prizes and free games coins. Just like the other Cash Collect slots in this series, Sahara Riches offers a Mini, Minor, Major and Grand jackpot that is randomly awarded when a Prize symbol is accompanied by the Cash Collect.

The Maximum Win potential is a very low 500x your stake, but this is offset by the medium volatility and offers a great deal of play for your money.

Software Provider
RTP
95.67%
Maximum win
£250,000

14. Sugar Rush  (Pragmatic Play)

There’s enough jelly babies, gummy bears and other sickly sweets to bring on serious tooth decay just by glancing at the screen. If your blood sugars are not about to shoot through the roof, then Sugar Rush is a real treat.

Offering the popular Tumble Feature that can be found in quite a few other Pragmatic Play slots, Sugar Rush is a 7x7 cluster pays slot - but with a low requirement of just 5 matching symbols to produce a win.

The Sugar Rush free spins bonus features Multiplier Spots where winning symbols explode to leave a multiplier behind. If that spot becomes part of another win during that spin, the multiplier is doubled each time, all the way up to an incredible 128x. Multiple multipliers can occur for a single win and it’s fair to say that this mechanic can offer some truly big wins.

The Maximum Win is capped at 5,000x which may seem low for a highly volatile slot, but when you see the number of maximum wins Sugar Rush has created, you can understand why!

Software Provider
RTP
96.50%
Maximum win
£500,000

15. Gates of Olympus 1000 (Pragmatic Play)

Pragmatic Play’s dominance of the best slot games list continues with the second iteration of its hugely popular Gates of Olympus franchise.

Gates of Olympus 1000 brings some significant upgrades on the original, the most obvious of which is the mammoth 15,000x maximum win potential.

This is mostly thanks to the increased multipliers which can boost your wins by up to an incredible 1,000x. 

Otherwise the game mechanics and game assets, such as artwork, sounds and animations are largely the same, with only a few minor updates.

Software Provider
RTP
96.50%
Maximum win
£1,875,000

16. Book of Dead (Play’n GO)

Play’n GO created this modern day classic nearly a decade ago, and since then it’s been the inspiration for hundreds of similar ‘Book of’ slots.

That’s mostly down to the extremely popular Expanding Symbol mechanic which is randomly selected during the free spins bonus.

To trigger the bonus and receive 10 free spins you need to land at least 3 Tomb Scatters. The Book is revealed and a random Expanding Symbol is selected. The premium symbols pay more, but are less likely to hit, while the lower ones hit more frequently, but pay less.

Rich Wilde, the leading character, is ‘devilishly handsome with an innate sense of adventure’ according to Play’n GO. In fact, he’s so adventurous that you’ll find a whole series of Rich Wilde slots of a similar theme including Rich Wild and the Amulet of Dead, Rich Wild and the Shield of Athena and Rich Wilde and the Tome of Insanity, to name just a few.

Software Provider
RTP
96.21%
Maximum win
£500,000

17. Big Bass Amazon Xtreme (Pragmatic Play)

Big Bass Amazon Xtreme brings all the best elements of the Big Bass series of slots, but this time it receives an Amazonian makeover.

The bearded fisherman sits snoozing in his canoe waiting on a big catch that appears in a randomly thrown net, where he’ll leap into action. Other random features include a Waterfall that adds additional fish during the Free Spins.

The Free Spins feature starts with the opportunity to take a pick from 13 clay pots - each one adding a free spin modifier such as more fish, more fisherman or guaranteed fish. Keep choosing until you hook the dirty old boot, upon which the spins start.

Big Bass Amazon Xtreme maintains the bonus trail which is climbed by landing the Fisherman Wilds. Each level achieved awards more free spins, and true to the Xtreme title, up to 70 extra free spins are available along with a massive 50x multiplier.

Software Provider
RTP
96.07%
Maximum win
£3,750,000

18. The Dog House Megaways (Pragmatic Play)

Incredibly, The Dog House Megaways is the only slot on the entire list to feature the Megaways game mechanic.

Created by Big Time Gaming in 2015, this hugely popular 117.649 ways to win reel configuration has been licensed and applied to many games since.

The Dog House Megaways retains the colourful charm of the original, but has received a number of improvements that really make the latest iteration stand out.

Apart from the obvious addition of Megaways, the biggest difference is that players now have the opportunity of choosing between two Free Spins Bonuses - Sticky Wilds Free Spins and Raining Wilds Free Spins.

Choosing which bonus to take depends on your attitude to risk - both have their merits with different levels of volatility, so choose wisely! 

Software Provider
RTP
96.55%
Maximum win
£1,230,500

19. Wolf Gold  (Pragmatic Play)

The North American wilderness holds a calming charm and Wolf Gold from Pragmatic Play reproduces that beautifully.

Picture yourself amongst the backdrop where the sun sets over a rocky canyon, casting a rainbow of colours across the screen. Bliss.

If that isn’t enough Americana for you, the reel symbols consist of bison, stallions, mountain cats and of course, the American Eagle.

To trigger the free spins feature you need to land 3 Scatters. During the free spins, the howling Wolf symbol is Wild and reels 2, 3 and 4 are locked together to form one giant symbol.

Land at least 6 of the Moon symbols to trigger the Money Respin Feature, where the Moon symbols hold random cash values, the Mini or Major Jackpots.

Software Provider
RTP
96.00%
Maximum win
£312,500

20. Burning Wins (Playson)

Our final slot on the list of 20 Best Slot Games is the simplest game of them all.

With a classic 3 reel and 3 row configuration reminiscent of a pub fruity from the 80s, you could be mistaken for thinking this is the oldest slot on the list. But you’d be very wrong.

The traditional reel symbols consist of cherries, plums, oranges, melons, bars and bells. And although dated in concept, the artwork is anything but. Vibrant colours and clever lighting create a realistic array of delicious looking fruit.

Not much needs to be said about this timeless classic. Simply spin the reels and enjoy.

Recommended Slot Games

How We Review The Best Slots Games

As slot experts at Gambling.com, we review new slot games every week. We 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.

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. Don't miss our list of the highest paying casinos, which also features the top 15 highest paying slots.

Online Slots RNG

Similar to land-based casinos, online slot machines have a Random Number Generator (RNG) which  makes sure that the symbols on the reels land in random positions with every spin. All the 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.

How Many Reels and Paylines Do Online Slots Have?

The most basic slot games usually have 3 reels and a single payline that typically goes through the centre of the reels. However, 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 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 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 check the paytable to 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. 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 paylines 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. 

Mobile Slot Games

With most slot players preferring to spin the reels on mobile, the majority of online slots are coded in HTML5, optimising them for mobile devices. Most developers use a mobile-first approach, ensuring new releases are designed for immersive mobile casino gameplay. Even classic online slots have been updated for mobile play, with most available instantly via mobile casino browsers or apps on Android, iOS and Windows Phone.

Slot Games RTP (Return to Player)

When you place a bet on a slot machine, it's natural to wonder how much you could potentially win. While slot payouts are random, each game's expected return is calculated through a precise mathematical model known as RTP, or Return to Player.

Understanding RTP

RTP is a percentage that shows how much money is returned to players over time. For example, if a slot has an RTP of 96%, it pays out £96 for every £100 wagered by all players collectively. However, since wins are random, one player might lose £100 while another hits the jackpot with just a few pounds.

Free Slot Games Online

Many websites let you play the best casino slots in demo mode, allowing you to try them out for free without spending your own money. This is a perfect way to explore different slots, getting a feel for the game’s theme, design, and features before betting real cash. Experienced players often use free slots to learn about bonus features, RTP, volatility, and betting limits. 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 offer attractive bonuses to entice new players and reward loyal ones. These include no deposit bonuses, which let you play top slot games for free. No deposit bonuses might give you bonus money when you sign up, free spins on featured slots, or both. Unlike demo mode, no deposit bonuses allow you to win real money, although you’ll usually need to deposit and meet wagering requirements to withdraw any winnings.

Online Slots Software

Top-tier software providers have had to up their game in recent years, facing ever-increasing competition from smaller studios eager to push the boundaries of innovation. 

This has led to an evolution in the online slot experience for UK players, who have access to an unprecedented selection of online slot software, each aiming to deliver a distinct and memorable gaming experience. 

Below we have listed the current top online slots game software providers, if you want to dig even deeper check out the Gambling.com guide for leading gaming software providers in the UK:

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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