This is the most up-to-date list of popular slot games for real money in the UK. The list of the 20 best slots to play has been produced using a combination of 2 sources:
- iGaming Tracker: they calculate the content share by counting all positions slots occupied as a percentage of total game positions at online casinos or slot sites.
- Chris Taylor, our King of Slots at OLBG, also weighs in with some of his favourites, which are amongst the most played at UK casinos and slot sites.
1. Sweet Bonanza (Pragmatic Play)
Sweet Bonanza is Pragmatic Play’s most popular game and also takes the top spot in our best slot games to play list for UK players.
With a sweets theme, it’s played on a 6x5 grid and uses Scatter Pays to award wins (8+ matching symbols anywhere on the grid). It’s playable from just 20p a spin.
With tumbles that lead to successive wins, the focus is on the Free Spins feature where Rainbow Bomb Multipliers up to 100x can land. There are also unlimited extra free spins to be won in this sugar-filled world. Sweet Bonanza serves up a high 96.49% RTP rate as well as 21,175 x bet max wins.
2. Book of Dead (Play ‘n GO)
Book of Dead is the most popular of all ‘Book of’ slots and is an iconic game that has spawned a whole series of Rich Wilde slots from Play ‘n GO
Countless spin-offs and clones and prompted most other studios to create their own ‘Book of’ titles. With 5 reels and 10 paylines, you head to ancient Egypt with an intrepid explorer from just 10p per spin.
All about the Free Spins feature, you begin with 1 randomly chosen special expanding symbol which occupies the whole reel when 3 or more land on the same free spin. Depending on the value of the chosen symbol, you could pocket up to 5,000 x bet on each free spin. With unlimited additional free spins up for grabs, it comes with a 96.21% RTP rate. It’s also the subject of many free spins offers.
3. Starburst (NetEnt)
An iconic release from NetEnt, Starburst is a simple game that has remained one of the most played amongst UK players since its release in 2012. 
With 5 reels and 10 paylines, this legendary favourite is simple, hypnotic and a superb choice for mobile play. No top slot games list is complete without this game!
Playable from 10p a spin, Starburst Wilds can land on any of the 3 middle reels. They expand to give you a fully wild reel and a free re-spin. Multiple Starburst Wilds can lead to 3 re-spins and/or 3 fully wild reels. With 500 x bet max wins, its smooth gameplay and stunning animations will keep you reaching for the stars time and time again.
4. Rainbow Riches (Light & Wonder)
Released way back in 2009, Rainbow Riches is arguably the most popular UK slot game on this list. 
Available online as well as in pubs and arcades, this Irish luck-themed favourite has 5 reels and 20 paylines. Playable from 20p a spin, its upbeat soundtrack and bright visuals make this a must-play game.
With a 95% RTP and 500 x bet max wins, it’s the gameplay that has stood the test of time. The Road to Riches feature sees you spin the wheel to move along the golden road whilst the Wishing Well feature sees you pick from the wells for a cash prize. In the Pots of Gold feature, bronze, silver and gold pots spin to reveal cash prizes. Light & Wonder also offers a huge number of Rainbow Riches slot games which we’ve compared in our detailed guide.
5. Fluffy Favourites (Eyecon)
Despite its dated graphics, Fluffy Favourites has earned cult status amongst UK slot players. This animal/toys-themed game has 5 reels and 25 paylines.
It’s playable from 25p per spin. Offering a high 41.51% hit frequency rate, the Elephant Wild/Scatter symbol substitutes and doubles wild wins.
In the Toybox Pick feature, you head to the fair and use a fairground grabber to grab up to 5 toys which can result in 500 x bet prizes. With the Free Games feature, there’s a 3x multiplier on up to 400 free spins. With a 95.39% RTP rate, Fluffy Favourites can pack quite the punch with 5,000 x bet max wins.
6. Big Bass Splash (Pragmatic Play)
The subject of many free spins promotions and offers, Big Bass Splash is a fishing/Wild West-themed favourite in the UK and all over the world.
With 5 reels and 10 paylines, this upbeat banjo soundtrack will have you ‘hooked’ in no time at all. With a high 96.71% RTP rate, it’s playable from just 10p per spin.
In the Free Spins feature, up to 5 modifiers are randomly awarded which give you more fish money symbols, extra Fisherman Wilds, triggers of other features, starting with a 2x multiplier and more free spins. The aim is to land the Fisherman Wild with fish money symbols which collects their values. Fisherman Wilds are also collected which will see you win more free spins and a fish money multiplier up to 10x. This can lead to 5,000 x bet max wins.
7. Bonanza Megaways (Big Time Gaming)
Released in 2016, Bonanza Megaways was the game that started the Megaways revolution. With a mining/gold rush theme, it has 6 reels and up to 117,649 ways to win (randomly determined on each spin).
Playable from 20p a spin, the Hillbilly soundtrack is one of my personal favourites.
With a 96% RTP rate, Bonanza comes with Reactions for successive wins and a Free Spins feature where every reaction/win increases the win multiplier infinitely. Offering 26,000 x bet max wins, it’s the go-to of all Megaways slots for many and has inspired sequels, spin-offs and hundreds (yes, that’s right) of attempted clones (none have got close in my opinion).
8. Big Bass Bonanza (Pragmatic Play)
Big Bass Bonanza is the slot game that started the Big Bass series back in December 2020. With 5 reels and 10 paylines, this simple fishing-themed favourite can be played on all devices from 10p per spin. 
Boasting a high 96.71% RTP rate, the focus is on the Free Spins feature.
Fisherman Wilds will collect the values from Fish Money symbols. The former are also collected to reward you with additional free spins and a multiplier of up to 10x. With the chance to ‘reel’ in 2,100 x bet max wins, Big Bass Bonanza is a UK mainstay at all casinos and slot sites with lots of welcome offers including this Pragmatic Play flagship game.
9. Cleopatra (IGT)
Take a trip down the Nile to unravel ancient Egyptian mysteries in IGT’s Cleopatra. With 5 reels and 20 paylines, it’s a favourite in Las Vegas casinos as well as online.
Playable from 20p a spin and with a 95.02% RTP rate, the Cleopatra Wild doubles your payout when part of a winning combination.
In the Cleopatra Bonus Game feature, you begin with 15 free spins and a 3x multiplier. With retriggers that can lead to 180 free spins, a win involving the Cleopatra Wild gives you a 6x multiplier essentially. This can lead to 10,000 x bet max wins on each free spin.
10. Immortal Romance (Stormcraft Studios)
Released in 2011, Immortal Romance is a vampire-themed slot game that tells a dark tale of love and intrigue. With 5 reels and 243 ways to win, it’s Games Global’s most popular game and my personal favourite.
It comes with a very high RTP of 96.86%.
With the best soundtrack ever produced, it benefits from 4 free spins features based on each of the characters. Offering various extras and modifiers, there are 12,150 x bet max wins to be won in this timeless classic.
11. Mega Moolah (Microgaming)
Mega Moolah was released in 2006 by Microgaming (now Games Global) and is the undoubted king of progressive jackpot slots. This African safari is played with 5 reels and 25 paylines from 25p per spin. 
Colourful, this low variance game comes with a high 46.36% hit frequency rate.
There are up to 30 free spins with a 3x multiplier as well as the infamous Progressive Jackpot Bonus Game. With 4 progressive jackpots to be won, the Mega Jackpot pays at least £2 million and an average of €6.69 million every 49 days. Paying up to €19.4 million in April 2021, there is now a Mega Moolah jackpot network with over 15 titles to choose from.
12. Tombstone RIP (Nolimit City)
Tombstone RIP is a Wild West-themed slot featuring murder, amputations and hangings. Brutally volatile, this controversial release comes with insane volatility and a 9.08% hit frequency rate.
It was also the first NLC game to use the xRIP mechanic where wins smaller than your bet are not awarded.
With xNudge Wilds, Reel Splits and xSplit Wilds, there are 2 free spins features. The Boothill Free Spins feature comes with Cowboy multipliers up to 999x. With 300,000 x bet max wins, it’s the highest max win slot game online!
13. Gonzo’s Quest (NetEnt)
The first slot game to use the Avalanche feature, NetEnt’s Gonzo’s Quest remains as popular today as when first released in 2011.
With 5 reels and 20 paylines, each win triggers Avalanches which increase the multipliers up to 5x in the base game. The RTP rate is 95.97%.
In the Free Falls feature, there are up to 20 free spins to be won. Avalanche Multipliers also apply but can reach 15x. This can lead to 37,500 x bet max wins on each free spin. A classic amongst classics, Gonzo’s Quest inspired spin-offs as well as Cascading Wins and Tumble features.
14. Jammin’ Jars (Push Gaming)
Jammin’ Jars is a fruit/disco slot game from Push Gaming that is played on an 8x8 grid with Cluster Pays. With a high 96.83% RTP rate, this funky favourite has set the standard for Cluster Pays slots. 
Offering plenty of bonus features, Jam Jar Multipliers increase when part of winning clusters.
In the Free Games feature, Jam Jar Wild Multipliers are carried over from the base game and move to random positions with each win as well as the multiplier increasing. Offering 19,998.5 x bet max wins Jammin’ Jars has prompted Push Gaming to create a sequel and many spin-offs.
15. Buffalo Blitz (Playtech)
Stampede your way to big wins in the prairies of North America with Playtech’s Buffalo Blitz. With 6 reels and 4,096 ways to win, you can spin away from 40p per spin. The RTP rate is 95.96%.
You can begin with up to 100 free spins in the Free Games feature. Look out for Diamond Wilds which come with multipliers up to 5x. Combining on multiple reels, you can benefit from unlimited retriggers for infinite free spins. Offering 13,373 x bet max wins, this cult favourite slot game is also very popular in land-based casinos.
16. Gates of Olympus (Pragmatic Play)
Join the Greek god Zeus in Pragmatic Play’s Gates of Olympus. Played on a 6x5 grid with Scatter Pays, you can spin away from 20p a spin with a high 96.5% RTP rate.
Beautifully designed and very popular amongst UK players, it comes with tumbles and multipliers up to 500x.
In the Free Spins feature, you venture to Mount Olympus where multiplier Orbs see their values added to the total win multiplier when part of a win. Not resetting, there are unlimited free spins to be won as well as 5,000 x bet max wins. It’s very similar to Sweet Bonanza (at the top of our best slot games list).
17. Age of the Gods (Playtech)
Head to Mount Olympus and join ancient Greek deities in Playtech’s Age of the Gods. The first in the series, it’s played with 5 reels and 20 paylines.
With a 95.02% RTP rate, it comes with 4 free spins features based on each of the gods: they offer multipliers up to 5x, increasing multipliers, stacked Wild reels and wild symbol transformations. This allows up to 50,000 x bet max wins.
With 4 progressive jackpots to be won, the Ultimate Power Jackpot pays a minimum of £100,000 and an average of £499,000 every 44 days. Age of the Gods has spawned a whole series all offering 4 jackpots.
18. Money Train 4 (Relax Gaming)
Relax Gaming’s Money Train 4 sees you join the bandits for the last ride of the rails. With a futuristic/steampunk theme, it’s played on a 6x6 grid with Scatter Pays. 
Playable from 10p a spin, this must-play slot game introduces new bandits and special symbols in the all-important Money Cart Bonus feature.
Offering superb animations, high-definition graphics and a superb soundtrack, Money Train 4 is Relax Gaming’s most popular title and is considered one of the greatest of all time. With a 96.1% RTP rate, it comes with 150,000 x bet max wins.
19. Dead or Alive 2 (NetEnt)
Dead or Alive 2 is a Wild West classic from NetEnt that has 5 reels and 9 paylines. Playable from just 9p a spin, this high volatility favourite has a very high 96.8% RTP rate. 
Your aim is to take down outlaws Apache the Kid, Della Rose, Jesse James, Belle Star and Billy the Kid.
With 3 free spins features, you pick the volatility level to suit your preferences. In the High Noon Saloon Free Spins, you’ll see sticky multiplier wilds which can lead to 111,111.11 x bet max wins in the feature as a whole. Considered the benchmark for Wild West slots, DOA2 is a must for gunslingers.
20. Razor Returns (Push Gaming)
Head to the depths of the Big Blue with Push Gaming’s Razor Returns. With 5 reels and 40 paylines, you can spin away in this shark-themed slot game from 10p per spin.
Offering a 96.55% RTP rate, this superbly-designed favourite has 11 bonus features.
With Mystery symbols, Nudges and Reveals, the Razor Reveal feature can award instant prizes up to 5,000 x bet, multipliers and lots of other prizes. In the free spins, there is a multiplier up to 25x as well as nudging Mystery symbols that increase the total multiplier. Razor Returns comes with 100,000 x bet max wins.
