Best Online Slots UK

Best For...	Game	Provider
🎰 Best for the jackpot	Mega Moolah	Games Global
🎲 Best for payout	Rainbow Riches	Gamesys
💎 Best for variance	Big Bass Bonanza	Pragmatic Play
⚡ Best for features	Money Train 2	Relax Gaming
💳 Best for betways	Bonanza Megaways	Big Time Gaming
📋 Best for graphics	Book of Dead	Play 'n GO
🤵 Best for mini-game	Chicken Game	Pragmatic Play
🏆 Best for music	Reactoonz 2	Play 'n GO
✔️ Best for high-rollers	88 Fortunes	SciPlay
🚀 Best for our team	Wolf Gold	Pragmatic Play

The UK’s Most Popular Online Slot Casinos in 2024

Whenever I’m looking to play real slots online I always check to find those contenders that are actually being played, and played a lot. Here are the most popular online slots in the UK:

40 Super Hot (Euro Gaming Technology)

Simple and exciting EGT knows exactly what it's doing with 40 Super Hot bringing an exemplary example of a classic online slot. Bringing fresh improvements from EGT's 20 Super Hot, this classic slot presents 5 reels and 40 fixed pay lines. Prepare to enjoy smooth gameplay where winning combinations are set alight on your reels. The slot offers various bonus features, including big win symbols, a jackpot game, and a gamble feature as well as a top prize of 400,000 coins.

• Reels: 5

• Paylines: 40

• Bet Range: £0.40 - £ 100.00

• RTP: 95.81%

• Volatility: Low

Fruit Party (Pragmatic Play)

Pragmatic Play's Fruit Party has a funky fun vibe and a 7x7 grid screen with a total of 49 blocks. This brings the feature of a cluster pay system where 5 or more matching symbols, touching horizontally or vertically, form a winning combination. A relatively new game, Fruit Party's unique style has been received extremely well and for good reason in an online gaming industry that is hungry for new concepts. The game comes with some great bonus features including the random multiplier making the gameplay more thrilling.

• Reels: 7

• Paylines: Cluster Pays

• Bet Range: £0.10 - £ 100.00

• RTP: 96.5%

• Volatility: Medium

White Rabbit (Big Time Gaming)

Based on the popular tale of Alice in Wonderland, White Rabbit Megaways is a true gateway to a fantastic experience. Big Time Gaming has gone to extensive lengths to create a forward-thinking online slot machine, one in which UK players can potentially win up to 17,420x their stake in this slot game. It's also stuffed with bonus features including many Caterpillar Wilds, a good amount of Down the Rabbit Hole Free Spins, and a Feature Drop.

• Reels: 5

• Paylines: 248,382

• Bet Range: £0.10 - £ 20.00

• RTP: 97.72%

• Volatility: Medium-to-High

All the best real money slots bring the biggest jackpots and the most free spins while featuring top-of-the-line gambling features such as new mechanics, and the best bonuses out there.

Which Are the Best Free Slots?

Here are just a few of the best slots available for free at CasinoTopsOnline;

• Mega Moolah

• Rainbow Riches

• Big Bass Bonanza

• Money Train 2

• Bonanza Megaways

As a player who has had my fair share of poor experiences, I cannot stress enough how testing a free slot allows you to ensure that you enjoy every minute of your gaming sessions once you’ve decided to place your first deposit.

Remember you can play all the top online slot games for free on our website, without risking any of your money. If you head to our cutting-edge games lobby, you’ll be greeted with the opportunity to try out some of the industry’s most exciting online slots for free! If you run out of credits, just refresh the page to receive new ones.

The Best Mobile Real Money Slots

• Mega Moolah

• Rainbow Riches

• Big Bass Bonanza

• Money Train 2

• Bonanza Megaways

• Chicken Game

• Book of Dead

• Reactoonz 2

• 88 Fortunes

• Wolf Gold

Playing games on your mobile makes for an easier experience all around. You can play on the go - so you're not confined to playing solely on your desktop computer. Today there are often dedicated games or sites for mobile devices, with most game providers keeping this in mind. Many games are mobile-ready from the beginning now as they include features like:

• Designs meant for a smaller screen, so it's easier to read;

• Larger buttons for tapping on your mobile;

• Adaptable games for any screen size.

With new games being put out every week keeping your finger on the pulse can give you the chance to enjoy exclusive new features, more creative themes and in many cases a more well-rounded package. I would advise having a look at the CasinoTopsOnline review of each of the slots featured to find out how sharp the industry’s cutting-edge really is from some of the world’s leading experts.

Types of Real Money Slots

There are many ways to categorise the sheer volume of slots today, these are;

By Theme

When it comes to designing a game, providers want it to be fun, appealing, and effortless on the eye. That encompasses the music, the visual design, and the gameplay symbols so whether you want to spin the reels on a marine pirate-themed slot or uncover potential riches in an adventure-themed slot game, there are plenty of different theme options to pick from.

By Payline

Payline numbers can vary in slot games - keep it simple with a one to five options or increase the number to as many as 50 for more ways to win. Picking a slot for its payline options means there are a few more chances when it comes to hitting a winning spin. A few slots only have a select few ways to win, while others will let you have thousands of potential lineups for winning symbols, as well as options for wild symbols and more.

By Reels

The number of reels on a slot can vary greatly from your classic three-reel slots such as Wild Diamonds and Super 7s, or go as high as five or six reels to increase the paylines such as on Book of Dead or Fruit Party.

By Volatility

The volatility of a slot is how the symbols on the reels change with each spin. So a greater variety of slot symbols means a higher potential number of wins, whereas a lower volatility slot will potentially mean a more consistent number of lower-value wins.

By Features

Each slot game comes into its own when you actually get down to playing. Each one will have its own great gameplay style, such as giving players scatter or wilds features which launch the symbols across the reels, or bonus rounds which give players free spins. Given these can totally transform slot gameplay, they're worth factoring in for your slot choice!

• Wilds

• Scatters

• Free Spins

• Multipliers

• Bonus rounds

Which Are the Best Online Slots in The UK by Payout Percentage?

According to our game reviewers, here is a list of the best 10 payout slots.

Top Payout Slots	Provider	Payout Percentage (RTP)	Volatility
Book of 99	Relax Gaming	99%	Medium
Ohh Ahh Dracula	Barcrest	99%	High
Jackpot 6000	Netent	98.75%	High
1429 Uncharted Seas	Thunderkick	98.6%	Medium
Tropic Reels	Playtech	98.5%	High
Joker Strike	Quickspin	98.11%	High
Moon Shadow	Barcrest	98.1%	High
Blood Suckers	Netent	98%	Medium
Starmania	NextGen	97.87%	Medium
Golden Tour	Playtech	97.71%	High
Pile 'Em Up Frosty Sweets	Snowborn	96.22%	High

Understanding RTP Rates

The RTP is the potential amount a player could hope to get back if they play over an extended period of time. So if a game has an RTP percentage of 96%, you could theoretically assume that if you play £10, you would get 96% of that - £9.60 - back over a larger gaming session.

It cannot be stressed enough that this is an indication and there is no guarantee you will win anything when you spin the reels. Through my own experiences, I would recommend you steer clear of slots with an RTP lower than 96%, with higher scores always being something to look out for. An industry standard, this is beneficial in that it not only suggests a higher chance of winning but also allows you to manage your bankroll and play for longer.

You should always consider many other factors when choosing a slot to play on. So if you’re choosing between Book of 99 and Gold Blitz Extreme it’ll be clear that the RTP will make a significant difference to the gameplay as Book of 99 has an RTP of 99% to the others 96%. However, when picking out slots with similar to identical RTPs such as Moon Shadow and Blood Suckers on 98%, this by no means the gameplay will be all that similar at all. Volatility, the game provider and even the theme will make the difference here in many ways determining how significant and how beneficial the RTP actually is to your gameplay.

What Is An RNG?

Another factor that is distinctly unique to online slots is the random number generator (RNG). This ensures that every spin has a randomly decided outcome when you hit the button to start the game. This keeps the game fair and makes certain that it isn't predetermined. 

Tested by third parties and officials to ensure that all its functionalities are fair, RNGs are also a good indicator of the value and significance of an online slot’s RTP percentage.

Tips For Choosing the Best Real Money Slot Sites in the UK

A fiercely competitive market yielding a great variety for any UK player, here are some tips to help you choose the best real money slot for you:

Mechanics of the Game

This factor encompasses all the specifics of the game during play, this includes the min/max stakes you can wager, the number of bet levels, the amount of pay lines and reels, along with the combinations to watch for that increase your chances no end.

Huge Jackpots

You can find different types of jackpots when playing the best online slot games to win: local jackpots, network jackpots, fixed jackpots, and progressive jackpots. I would suggest the highest chances come from the progressive jackpots, which could reach simply eye-watering amounts.

Fun Bonus Games

Bonus games bring a secret extra twist to the best casino slot games. Sometimes, you'll spin symbols that trigger an extra round or a new gameplay mode. For example, a bonus round might start with the correct symbols that multiply your win or give you a certain number of free spins to add to your total.

References

• Math with the best slot machines (Forbes)

• The first slot machine ever (ThoughtCo)