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Online Slots – 1,000+ Slot Reviews & the Sister Sites Where to Play Them

We’ve tested over 1,000 online slots in the United Kingdom and are far from done. Each test follows an extensive review that includes the most critical information, such as the slot’s RTP, maximum win, bonus symbols, and sister sites that offer them.

Browse the list of slot reviews below and sort by name, highest RTP, and the most recently reviewed games.

1,256 Online Slots Found

Showing 20 of 1,256 slots

A Guide to Online Slots In The United Kingdom

Online slots are online versions of traditional slot machines that follow the same rules. To score a winning combination, you must spin several reels (typically five) and match two or more identical symbols on an active payline.

You can select your betting amount on each spin, which the slot developer predetermines. For example, most online slots allow you to wager as little as five pence up to £100 or more per spin. The more you bet, the higher the reward when scoring a winning combination.

Each slot will have a different number of winning combinations, which are the lines that stretch across the slot’s reels in different directions. You’ll have to land matching symbols on these paylines to make wins, so the more paylines, the better chance you have of making wins.

In recent years, the Megaways slot range gained much attraction. Due to a new mechanic where the slot’s symbols can hold anywhere from two to seven icons, Megaways slots have up to 117,649 ways to win on a single spin.

A Selection of Megaways Slots

Here are some Megaways slots we’ve reviewed in the past. Check out the reviews, which include information on ways to win, payouts, minimum and maximum bets, and a Youtube video.

RNG and Return to Player (RTP)

Two of the most important acronyms in online slots are RNG and RTP. While both sound similar, they each have a completely different purpose.

RNG stands for random number generator and determines the outcome of each spin based on a mathematical formula with an unpredictable result. An RNG ensures that gambling operators cannot rig their games and obtain an unfair advantage over their players. The best online casinos all use RNGs as it is a requirement to obtain a valid gambling license.

On the other hand, RTP stands for Return to Player and tells you how much an online slot pays out to its customers over time. A slot machine with a 96.77% RTP will return nearly 97 pence of each £1 wagered back to its players.

It’s important to remember that RTP is measured over time, and short-term payout rates can be much lower or higher than the stated return rate. Also, while a slot’s developer typically sets a range of RTP values, online casino operators have the possibility to adjust a game to the lower or higher end of that rate. For that reason, and before playing any online slot, we recommend consulting the game’s paytable, which tells you exactly what kind of RTP you can expect from the game.

Different Types Of Online Slots

When it comes to online slots, there are different types of games, such as:

Branded slots are gaining the most attention because they use existing properties for marketing themselves. For example, at modern online casinos, you can play titles like Guns N’ Roses, Bridesmaids, Jurassic Park, and Terminator 2. These online slots will look, feel, and sound like the brand, so there is a good chance that Guns N’ Roses fans will also like the video game.

Due to the complex nature of licensing, not all slot developers make branded content, but some of the leading ones do, such as NetEnt or Play’n GO.

Next up on the popularity list are jackpot slots, which offer life-changing wins to their players. There are different types within that category, but the most-played games are so-called progressive jackpot slots.

These games, like Mega Moolah or Mega Fortune, have multi-million-pound jackpots as they grow from losses across all online casinos that have the slot in their portfolio.

As you can imagine, it’s not easy to win a progressive jackpot, but if you do, money is the last thing you have to worry about in your life.

Online Slot Features

The best online slots in the UK are jam-packed with special features, offering you more chances at making wins and making the slot more fun to play. Some of the most common features found in online slots include:

There are notable other special features which can make online slots in the UK more fun, but they’re somewhat rarer. They include avalanche mechanics which can offer lots of wins on single spins, and various wild symbol mechanics such as expanding wilds, stacked wilds, and more.

All of these special features vary depending on the online slot, which is why it’s so important to read through the game’s paytable and rules, so you know exactly what’s available and how everything works.

Online Slots Bonus

One of the benefits of playing online slots is that they are compatible with bonuses. There are two main types of an online slots bonus; free spins and bonus funds. Both of these promotions, which require deposits of real money, are compatible with slots but it’s important to note that while bonus funds can be used with all slots, free spins from a bonus are usually limited to select games.

There are other limitations imposed on online slots bonuses like this, including maximum bet size, expiry dates, wagering requirements (Meaning, the number of times you’ll need to wager something before it can be withdrawn), and sometimes maximum win or withdrawal limits. All of these limitations can be found in the terms and conditions of an online slots bonus so you can easily read up on what is expected or required of you.

Alongside the above online slots bonus offers, there are other promotions which are compatible with online slots, and they include wager-free bonuses which do not have wagering requirements, online slots no deposit bonuses, and slot tournaments too.

Online Slots No Deposit Bonus

An online slots no deposit bonus is a special type of promotion which offers you either bonus funds or free spins without you having to make a deposit. To claim these online slots bonuses, you usually just have to sign up with the website and claim them. However, online slots no deposit bonuses tend to have stricter terms and conditions including shorter expiry times, lower maximum win limits, higher wagering requirements, and they can only be used on very select games.

Online Slots Tournaments

Alongside online slots with no deposit bonuses, another popular type of promotion are online slots tournaments which are competitions where you play specific online slots against other players and try to top a leaderboard to win exclusive prizes. Some online casinos offer these regularly while others offer them as rare promotions. Regardless, you’ll usually have to purchase tickets to enter slot tournaments and will have a select number of spins to use to rank up points for the leaderboard.

The UK’s Top 5 Slot Sites

Slot Site # of Slots Review
Spin Genie 1,500+ Review
Slots Million 3,680 Review
SpinStation 500+ Review
Queen Vegas 1,280 Review
Gala Spins 2,000+ Review

How To Pick The Best Online Slots

Generally speaking, the best online slots will vary person-to-person as they’re all dependent on preference. Many users enjoy playing online slots that are basic and easy, while others will prefer games that have more special features and complicated gameplay mechanics to hold their interest.

We’ve found that the best online slots will have some special features to help you make more wins, have a fun theme with good visuals and animations, and will feature a good number of paylines with a high RTP. All of this should help create the best online slots in our experience.

However, we suggest you try different online slots out to discover which mechanics you prefer, what kind of gameplay you enjoy, and so on. Remember, only you can determine what the best online slots are, and you’ll have to play to find out!

Top-Rated Online Slot Machines

Due to the sheer number of online slots in the UK, it can be difficult finding the best online casino slots, even if you research every game available. Luckily, we’ve spent lots of time reviewing and checking out different slots and have compiled our list of the best online casino slots available right now. Take a look at our recommendations below:

Book Of Dead By Play’n GO

Book Of Dead is one of Play’n GO’s most famous games and one of the best online casino slots around. The Egyptian-themed slot follows adventurer Rich Wilde as he attempts to uncover the ancient Book Of Dead. The game uses a 5×3 layout with 10 paylines, has an RTP of 94.25% and comes jam-packed with plenty of special features including wild symbols, expanding symbols, and a gamble mechanic to boost your winnings.

Gonzo’s Quest By NetEnt

Gonzo’s Quest is widely regarded as one of the best online casino slots of all time. The game, which follows a conquistador named Gonzo, features stunning South American-themed visuals. It uses a 5×3 layout with 20 paylines and it has an RTP of 95.97%. If that isn’t enough, you can enjoy numerous special features such as free spins, multipliers, wild symbols, and more.

Mustang Gold By Pragmatic Play

Mustang Gold is an online slot by Pragmatic Play, and one of the developer’s most popular video slots. The Wild West-themed slot uses a 5×3 layout with 25 paylines and it has an RTP of 96.53% which is high, making it one of the best online casino slots to play. Special features in this game include a free spins mode, scatter symbols, a pick-an-object mode, and plenty more to help you make wins.

Bonanza By Big Time Gaming

Bonanza is a mining-themed slot from Big Time Gaming and one of the first games to use the MegaWays game mechanic. This exciting slot uses a 6×7 layout with 117,649 paylines and it has an RTP of 96%, which is great. Some of the special features in the game include free spins, an avalanche mechanic, cascading wins, multipliers, and more.

Rick And Morty MegaWays By Blueprint Gaming

Rick And Morty MegaWays is an online slot by Blueprint Gaming based on the hit sci-fi comedy Rick And Morty. The game uses the MegaWays engine under a license from Big Time Gaming. It uses a 6×7 layout with 117,649 paylines and it has an RTP of 96.55% which means it’s one of the best paying online slots. The slot is also packed with features including an avalanche mechanic, scatter symbols, a bonus wheel, free spins, random wilds, and more.

Online Mobile Slots Explained

Another benefit of playing online slots is that almost all of them are compatible with mobile devices. This means that you can easily play all of your favourite slots on mobile and while on-the-go as long as you have an internet connection. Unfortunately, there will be some online slots that cannot be played on mobile, but there are enough online mobile slots to keep you busy for a very long time.

Generally speaking, there are two ways of playing these online slots on mobile devices; either by downloading a dedicated casino app to your phone or playing online slots at a casino website in your smartphone’s browser. It couldn’t be easier to access and play online slots!

Online Slots Real Money Vs Free

When it comes to playing online slots, there are two main ways; playing online slots with real money and playing for free. In the UK, you cannot play online slots for free, nor can you demo slots. This is due to the tight rules surrounding slots imposed by the UK Gambling Commission. The main way to play online slots is real money, meaning you’ll need to use real money to play online slots.

One way around this limitation, however, is by registering with a casino site offering a no deposit bonus, essentially allowing you to play for free. Unfortunately, it can be extremely hard to find a casino website offering no deposit bonuses, so most gamers just play online slots with real money anyway.

Best Paying Online Slots

As we’ve already mentioned on this page, all online slots have varying RTPs, and it’s a good idea to try and find a video slot which has a high RTP to provide you with a better chance at making wins. We’ve reviewed countless slots and have decided to put together a list of slots with the highest RTP rates so you can easily find the best paying online slots and start playing.

Are Online Slots Better Than Other Casino Games?

The answer to this question will generally depend on your personal preference. Many people enjoy playing online slots because they are simple to understand and learn but can offer big wins and be extremely exciting to play. Other users, however, prefer playing online versions of classic casino games like poker, roulette, blackjack, and more.

You can also enjoy playing all of those games too. If you’re unsure about what type of game you might prefer, we suggest you try playing different casino games to figure out what entertains you the most. So go ahead and try, you might find that you’re a big slot lover or someone who just prefers other casino games!

How To Play Slots Online

Playing online slots is easy. Generally speaking, all you have to do is find an online casino offering the online slots you want to play and then register with it and verify your account. Once you’ve done this, you can make a deposit, claim any associated bonuses, and then open up the online slot you want to play.

Once you’ve loaded up the online slot, you’ll need to adjust your bet by using the buttons at the bottom of a slot. After adjusting it to your desired size, you simply need to hit the ‘Spin’ button to start the game or use the online slot’s autoplay function, allowing you to select how many times you want the slot’s reels to spin automatically.

Online Slots UK: A Summary

Online slots are incredibly fun to play, and they’re widely available in the UK. You shouldn’t have any trouble finding the best online slots, and since there are so many special features, gameplay mechanics, and themes, you’re unlikely to ever get bored. If you’re new to slots, we suggest you check out some of the best online slots we’ve recommended on this page and sign up with some of the casinos here too, and within no time you’ll be playing!

Online Slot FAQ

How Can I Find The Best Paying Online Slots?

The best way to discover what the best paying online slots are is by heading over to a slot developer’s website and check the RTP rates listed there. However, since there are so many online slots in the UK, this can be rather time-consuming. That’s why we suggest you look through the list on our website which easily provides you with the information you need.

How Do Online Mobile Slots Work?

Online mobile slots work just like their desktop and laptop counterparts. As explained, you just need to load up the casino either in-browser or through an app and start playing. Most websites are now compatible with touch devices, so you can easily play while on-the-move.

How Do I Play Online Slots With Real Money?

All you have to do to play online slots with real money is register with an online casino, verify your account, and make a deposit. After that, you’ll simply have to load up your slot and play! It’s that simple!

Can I Play Slots For Free?

Unfortunately, due to UK regulation, you cannot play online slots for free. All online slots must be played with real money and you must be a verified and registered user at a licensed casino website.
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Online Slots – 1,000+ Slot Reviews & the Sister Sites Where to Play Them
Last updated
15 April 2024

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