4 Reel Slots

Discover the best 4 reel slots in the UK. 4 reel slots are slot machines that have exactly four symbol reels. These slots are fun casino games with free spins, bonus features, special wilds and many other mechanics.

On this page, you can find the best games to play, learn how 4-reelers work, what kind of features these games have and see which providers make these slots.

Best 4 Reel Slots for Real Money

We have gone through the 4 reel slots that you can play for real money and picked the best ones. This is a hand-picked list of the top 4-reel online slots for you to try.

The best 4 reel slots are listed in the table below:

1. Outsourced

Outsourced takes you to the dangerous world of kid's toys, or at least the dangerous manufacturing part. The reels are filled with tat you wouldn't even find in Poundland.

The game is full of different kinds of free spins features, such as Sweatshop Spins, Sweatiershop Spins, Print Spins, Printier Spins and so on. And then the spins themselves have their own special mechanics on top of that.

Outsourced is a NoLimit City slot through and through. The game's volatility is high, the theme is crude, and the game is packed with every special mechanic known to man.

Play at Winlandia »

2. Mysterious

Mysterious is a ghost-themed game set in the Victorian era. Pragmatic Play did a great job with the visuals, and the theme feels on point.

At the start of any round, the game can change by introducing a new ghost. The Lord, The Lady and The Baron all change how the game plays out by adding their own twist.

The Lord is all about multipliers, The Lady expands symbols to fill the reels and The Baron can infect other symbols and turn them into wilds.

Play at Coral »

3. Gems Infinity Reels

Gems is one of Reel Play's Infinity Reels slots. This feature means that even though you have only four reels visible, you can get wins that are, at least in theory, infinitely long.

Whenever you get a win with a winning symbol on the rightmost reel, the reels nudge to the left and reveal a set of new symbols. If there is a new winning symbol on the right, it happens again and again.

There are also extra multipliers, which increase every time a new reel is added, or a Wild Princess is fully visible on the reels. Oh, and don't forget that you can double the number of playfields during the free spins.

Play at PlayMillion »

4. Om Nom

Hacksaw Gaming's Om Nom is one of the cutest slots out there. It's all about junk food, and you are served quite a handful. Be careful not to get too stuffed.

Om Nom is part of their POCKETZ series, meaning the game is made for mobile devices and is best played on the go. The features are simple and do not require a mouse.

So, what is there then? You get two main features, free spins and mystery multipliers. At the start of every round, one symbol is picked for a special multiplier that can be up to 100x.

Play at LeoVegas »

5. Power of Gods: Valhalla

Join the Vikings as they revel in their riches in the halls of Valhalla. This multi-tiered jackpot slot is a simple, yet intriguing game from Wazdan.

When you play the slot, you may notice that there aren't that many special features. This is by design, as all the focus is on the Hold the Jackpot bonus game.

If you get 6 or more gold coins on the reels, the feature activates. All the other symbols are removed, and you get three re-spins. Every new coin will reset those re-spins, and you play until you fill the grid or run out of spins.

Play at Thor Slots »

6. Donuts

Donuts is one of Big Time Gaming's classics. This game was released all the way back in 2018 but it manages to hold on to a top position even after all these years.

What makes this game so delicious is the free spin mode. You start by increasing your multiplier, and then you play the spins. The bonus spins are re-triggerable without any limits, so the wins can rise more than doughnut batter in summer.

If you ever thought that 4-reel slots can't have high volatility and big maximum payouts, then you need to try Donuts.

Play at Swift Casino »

7. Joker Troupe

Joker Troupe is a high-volatility slot from Push Gaming. Even though the game may look simple, it can quickly escalate to a whole new level.

The game is all about those titular Jokers. They are scatter symbols, and each will trigger their own free spins feature. Every colour is different, and everyone's got their own favourite.

The Red Joker is all about hyperspins, which count time instead of a fixed number of spins. The Blue Joker stacks new rows one on top of another. And the Green Joker has a Wheel of Fortune bonus game.

Play at Ahti Games »

8. Jackpot Builders

Wazdan has made several popular 4-reel slot machines, and Jackpot Builders is one of them. Jackpot Builders is an older slot, which is quite easy to see by looking at the game. However, there is a reason why we, and many players, still love it to this day.

It's a bit strange to have the name Jackpot in the title and have such a small maximum win, but that's not the full story.

Jackpot Builders is one of the few good 4-reel cascading slot machines. With every winning combination, those symbols get removed, and new ones fall in to create more wins. This feature is common in bigger games, but not in 4-reelers.

Play at Play Jango »

9. Folsom Prison

Folsom Prison may be a bit of a stretch when we are talking about 4-reel slots, but hear me out. The game does start with only 4 reels and 16 paylines available to the player.

As this is a NoLimit City slot, you might have already guessed where I'm going with this. If you get a wild, scatter, xSplit or xWays next to a closed cell, you unlock it and increase the size of your playfield.

The game is filled with features, bonus games, special symbols and everything you'd expect from a NoLimit slot. Just looking at the maximum payout tells you that this is no ordinary 4-reeler.

Play at Mr Vegas »

10. Boo

Boo is a slot from Big Time Gaming, and it's filled with scary ghosts. Well, cartoony ghosts, at least.

The game revolves around the cascade mechanic, and you can potentially get an endless cycle of wins. As old winning symbols are removed, new ones fill the spots and create new reactions.

Where the real magic happens is the free spins. Get three or more scatter pumpkins, and you start the free spins. During the free spins, there are persistent multipliers, and if a ghost happens to hit that square, the multiplier shines through the phantasm.

Play at Betrino »

4 Reel Slot Sites in The UK

There has been a huge increase in the number of 4 reel slots in recent years, and also in the number of 4 reel slot sites in the UK. With more slots with four reels there are, the more sites are going to have them.

Back in the day, these slots were hard to find. Now, every one of the top online slot sites will have a good amount of 4-reelers waiting for you.

The 4 reel slot sites in the UK are listed below:

What is a 4 Reel Slot?

A 4 reel slot is a slot machine that has four reels of symbols. The reels spin and stop at random positions creating combinations that may lead to a payout.

Slots with 4 reels are somewhat rare, with the most common sizes being 3 and 5 reels. In recent years, the number of 4-reelers has gone up significantly.

4 reel slot machines often have mechanical designs that mix both smaller and larger games. They can usually have major bonus features, but at the same time have higher RTP values similar to 3-reelers.

How Do 4 Reel Slots Work?

4 reel slots work by spinning four reels with symbols to create combinations on paylines. If you get the right symbols, you win according to your bet.

Slots with four reels are considered small, however, there are smaller games out there. When a slot has fewer reels, the payouts happen more often but are not as big. This is also reflected in the slot's volatility.

While most 4 reel slots operate just like any other online slots machines, there are games that change the formula. The smallest grid-based games have a 4x4 field, which is basically four reels.

Free 4 Reel Slots

There are a few ways you can play 4 reel slots for free. The first is to get free spins, which are real money bonuses, and the second is to try the games in demo mode.

Free spins are a bonus offer online casinos have that are in place to entice players to try out the casino. You can check our list the free online slot spins, which shows you all the casinos that offer these bonuses.

The second way to play for free is to join a casino and play in the demo mode. Age verification is mandatory, but you get to familiarise yourself with the games this way. It's good to try out a game first before playing it with real money.

Features On Four Reel Slots

Four reel slots are filled with special features and different bonus mechanics. Because the games are physically larger, the potential for unique features grows.

Although the games are very different, they share some similarities. The RTP values of four reel slot machines are generally high compared to other reel configurations.

Some of the more popular special features you find in 4-reel slots include:

• Free spins
• Increasing multipliers
• Special wilds
• Scatter symbols
• Changing layouts

Popular Types of 4-Reel Slots

You have a good amount of choice when picking a 4-reel slot. Here are some of the popular types of slots that have 4 reels:

Game Providers For 4 Reel Slot Machines

There are numerous game providers that create 4 reel slot machines in the UK. Even though they are not as common as 5-reelers, you have a lot of options when it comes to suppliers and different kinds of slots.

Check out the following game providers for 4 reel online slots:

NoLimit City

NoLimit City is known for the extremely volatile slots that go beyond anything others are releasing. The games feel very unique and are easily recognisable.

It has been great to see how NoLimit City slots UK are getting more variety. Their experiments with different reel combinations and sizes have definitely yielded fruit.

Wazdan

Wazdan is a provider with a versatile game library. They have done it all and tried everything, so it's not a surprise that they have 4 reel slots in their game library as well.

It is also easy to find Wazdan casinos, as surprisingly many casinos have picked their games. You have a lot of options when it comes to where to play and what to play.

Big Time Gaming

Big Time Gaming hit it big time, pun intended, when they created the Megaways mechanic. These games are one of the most popular slots there are.

However, there is more to this developer than just those games. You can find some amazing Big Time Gaming slots in UK casinos that satiate your hunger for variety

Pros & Cons of 4 Reel Slot Games

Every slot category has its own strengths and weaknesses. Some games are better for one type of player, while others enjoy the complete opposite.

These are the pros and cons of 4 reel slots:

Alternative Slot Games

In the UK, there are slots of different sizes available. While 4 reel slots have their own unique feel, you can try other slot games as well to see if they are more up your alley.

Here are some alternative slot games.

3 Reel Slots

When you think of 3 reel slots, the first thing that comes to mind is probably fruit machines and Vegas-style slots. However, in online casinos, that is not the whole story.

There are a lot of amazing modern online slots that have 3 reels and wild features. This is a design space that providers have just started to crack.

• Popular 3 reel slots: Fire Joker, Charlie Chance in Hell to Pay

5 Reel Slots

5 reel online slots are the default slots at online casinos. Most of the slot machines you find at online casinos have five reels, and many of the special features you see these days were perfected in these games.

Even though it is fun to try out different sizes, a classic is still a classic. When you play 5-reelers, you know you are getting a balanced slot that is not too big or too small.

• Popular 5 reel slots: Book of Dead, Rise of Olympus 100

6 Reel Slots

Slots with 6 reels are quite common, especially due to one specific game mechanic. Most Megaways slots have 6 reels, and they are extremely popular games.

Now, there are other 6-reelers out there for you to play, but it is obvious which games rule this category.

• Popular 6 reel slots: Bonanza Megaways, Dragon Champions

FAQ

About the Author

Article by:

Ville Saari

Ville is an iGaming industry veteran who has written thousands of gambling-related reviews and articles since 2009. He is an IT engineer with a passion for game and strategy optimisation and for teaching the world to play better.

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Edited By:

Elmo Kukkonen

Elmo began his career in the gambling industry in 2019. Over the years, he has gained extensive knowledge of casinos, offering a unique insider perspective. With his passion for information and writing, he provides accurate and honest reviews to help players make informed decisions and confidently navigate the world of online casinos.

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