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UK Rank based on 14200+ indexed slot games

Top ranked slots UK, October 2019


Video Slot. RTP: 96.09%

Starburst is one of NetEnt’s most famous slots, and it rose to stardom soon after it was launched back in 2012. It’s a timeless classic that remains as relevant and fun today, as it was when it was first released. Starburst is among the most popular slots you’ll find online, and not seldom it’s the assigned slot for free spins promos and welcome offer free spins.

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Video Slot. RTP: 96%

Bonanza Megaways is a powerful, unusual and exciting slot from Big Time Gaming. It was first released in december 2016, and you’ll see from the get-go that you’re in for a very special ride here. It’s based on the Megaways game engine, and this means you can activate up to an astonishing 117 649 paylines. This alone should tell you that this is a must try slot, but there is plenty more at offer here also.

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Book of Dead

Video Slot. RTP: 96.21%

Book of Dead was first launched back in january 2014, and it’s among the most popular slots online for UK players. Play’n Go has done a very good job creating this adventurous game. The Indiana Jones like character, Rich Wilde, goes on a mission to Egypt to uncover some ancient artefacts, just like we’ve seen him do in Pearls of India. The treasure hunt is on, and you can lead the way, and win big on this high variance slot.

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Rainbow Riches

Video Slot. RTP: 95%

Rainbow Riches is a legendary 5-reel slots game, and the first theme from the Barcrest casino game library now available to customers integrated with the Williams Interactive Remote Game Server. Featuring the classic Road to Riches Bonus where players can win up to 500 x stake by spinning their way along the road, players can also win big on the Pots of Gold Bonus or take their chances during hte Wishing Well picking bonus.

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Wolf Gold

Video Slot. RTP: 96.01%

Wolf Gold is an enticing slot game by the renowned Pragmatic Play. Ever since its introduction in web-based casinos, this slot continues to strike both new and experienced gamers with unmatched graphics and diverse payout features. With a native American theme, the Wolf Gold slot machine is playable across devices. The designer welcomes all slot lovers as the betting range is quite elastic while free spins bonus is easily triggered.

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Gonzo's Quest

Video Slot. RTP: 95.97%

Gonzo’s Quest is nothing short of a legendary video slot, and it has long since established a worldwide cult following. The game, with the charming conquistador Gonzo in the lead role, has become synonymous with NetEnt, and acts more or less as the unofficial logo and ambassador for the famous Swedish game provider.

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Lightning Roulette

Live Casino. RTP: 97.3%

Our unique Lightning Roulette is like no other Roulette game. Not only is it visually stunning, it also adds high-payout RNG Lucky Number wins to every game round. All the familiar elements of our world-class Live Roulette are here — the live wheel, the live dealer, the full line-up of Roulette bets. But Lightning Roulette adds a whole lot more for an electrifying player experience and extra chances to win. In each game round, between one and five Lucky Numbers are struck by lightning and given multiplied payouts of between 50x and 500x. With its involving game show-style environment with advanced sound and lighting effects, Lightning Roulette is unique and electrifying spin on traditional Roulette.

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Mega Moolah

Video Slot. RTP: 88.12%

Mega Moolah is a five-reel and 25-payline slot game created by Microgaming – a popular designer of casino games and software developer for online casino games. It serves as a fine option for both people who are new to the world of slots as well as experienced gamblers who’re looking to bag the big bucks. The minimum coin bet you can place on a single payline is 1p, while the maximum is 5p. This progressive penny slot allows players to wager a maximum of 125 coins per spin.

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Mystery Reels Power Reels

Video Slot. RTP: 95.67%

Mystery Reels Power Reels is an exciting combination of our smash hit Mystery Reels and our successful Power Reels mechanic. It's a 7x6 slot where all wins pay both ways and multiple symbols can form payouts on a single win line. The Mystery Symbol is now a 2x2 Super Symbol which clones and spreads across the reels revealing the same random winning symbol for big wins! With 30 win lines and a max award of over 5,000x, players are sure to be captivated by this high volatility adventure!

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Immortal Romance

Video Slot. RTP: 96.86%

Immortal Romance is one of Microgaming's most successful slots ever, and even though it was first released back in 2011, it’s still among the most popular games in the casinos for UK players. The combination of romance and vampirism has just grown in popularity since this game first came out, and this can probably explain some of Immortal Romance’s broad appeal.

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Blue Wizard

Video Slot. RTP: Unknown

Blue Wizard comes with nice colorful symbols, and you’ll benefit from a Fire Blaze Re-spins feature where you can win a Grand Jackpot of 2,000 times your stake. The free spins feature can give you even higher wins, and this game was released by Playtech on the 2nd of July 2019.

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Who Wants To Be A Millionaire Megaways

Video Slot. RTP: 96.24%

Who Wants to be a Millionaire Megaways is Big Time Gaming’s first branded slot, and - of course - it’s based on the world famous TV game show by the same name. It runs on the Megaways engine, and every win benefits from the Avalanche feature to give you more winning chances. If you ever wanted a shot at becoming a millionaire on the show, this is your big chance right here!

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Rainbow Jackpots

Video Slot. RTP: 95.24%

In a magical world of colour and sound where four leaf clovers and golden horseshoes spread their luck around, the magical treasure of the Leprechaun is hidden and awaits to be uncovered. The Leprechaun himself occasionally appears to guide the players in their journey of fortune and wealth. Blowing surprises out of his pipe he makes sure that this experience will be the most exciting that players could have.

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Pirates Plenty Battle for Gold

Video Slot. RTP: 96.12%

In the world of online slots, pirate themes certainly are plentiful! In fact, clicking on the “pirates” tag at SlotCatalog will return a search result of well over a hundred pirate-themed games. Of course, not all pirate slots are created equal, but in our opinion, the Pirates’ Plenty series ranks up there with the best of them!

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7's To Burn

Video Slot. RTP: 95.1%

7’s to Burn is a classic fast paced three reel jackpot slot game with five win lines. This exciting game also features the exciting new Hi Roller feature. To win spin 3 matching symbols on a win line.

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Pirates Plenty The Sunken Treasure

Video Slot. RTP: 96.12%

Pirates Plenty The Sunken Treasure starts out as a 5-reel slot, but you can unlock a 6th reel by landing enough treasure map symbols. It’s very important to get this done, as you will benefit from more features and higher potential when you do. This is a great looking (and sounding) pirate game from Red Tiger, and it was released on the 15th of November 2018.

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Reel King Mega

Video Slot. RTP: 96%

Reel King has been a favorite physical slot machine in the UK, and it has a legendary status amongst many players. This new version from Red Tiger is true to the brand, and it comes with some interesting bonus features. This is a game with low volatility, and the potential max win is 500 times your stake.

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Age of the Gods God of Storms

Video Slot. RTP: 96.14%

Video Slot 'Age of the Gods God of Storms' from the software provider Playtech is a 5*3 game with 25 betways. Slot has RTP=96.14% and MED? level variance. Main game features are: Wild, Expandind wild with re-spin, Multiplier, Jackpot, Respins.

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Buffalo Rising Megaways

Video Slot. RTP: 96.5%

Buffalo Rising Megaways is a very idyllic looking game from Blueprint, and you’ll find plenty of action as you might expect with this kind of game engine. The game was launched on the 19th of October 2018, and you’ll benefit from both cascading reels and up to 117,649 ways to win.

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Twin Spin

Video Slot. RTP: 96.55%

With Twin Spin, NetEnt has combined the excitement of the classic fruit machine with a high-powered, hypermodern video slot. First launched back in December 2013, this slot remains as popular as ever. Every spin comes with two identical and adjacent reels that are linked together, hence the name Twin Spin. These twin reels can also expand and become triplet, quadruplet or even take over all 5 reels at the same time.

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Age of the Gods

Video Slot. RTP: 95.02%

Video Slot 'Age of the Gods' from the software provider Playtech is a 5*3 game with 20 betways. Slot has RTP=95.02% and MED level variance. Main game features are: Wild, FreeSpins, Bonus Game, Jackpot, Scatter symbols, Feature: Substitution Symbols, Bonus symbols.

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Buffalo Blitz

Video Slot. RTP: 95.96%

On the fruited planes and below the purple mountain majesties, are a pack of buffalo. (With other furry friends such as bears and moose.) These buffalo stampede their bulky bodies constantly, blitzing in all directions. For you, that means that Buffalo Blitz is an all-ways slot with 4,096 ways to win!

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Golden Leprechaun Megaways

Video Slot. RTP: 96%

Golden Leprechaun Megaways comes with up to 117,649 ways to win, and 3 different reel modifiers in the base game. These can be triggered on any spin, just look out for the green, little leprechaun to present you with his magic mushrooms. Red Tiger has made a good-looking and charming game, and it was launched across all casinos on the 5th of September 2019.

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Giant Grizzly

Video Slot. RTP: 96.19%

Catch the bears for Giant Expanding Wilds and instant cash prizes! Grab your camera and hunt down the ultimate apex predator of the lush northern forests in this game with 432 win ways. Follow the footprints of this majestic creature for fantastic winnings with a large variety of different giant Expanding Grizzly Wilds and instant Grizzly Action Wild cash prizes. During Grizzly Free Games the reels with turn into tumbling reels with even bigger chances for Expanding Grizzly Wilds and Grizzly Action Wild prices occurring at the same time.

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The Best Ranked Online Slots

In this section you`ll find our always up-to-date list of the top ranked online slot machines. We provide unique and distinct lists for all different regions, and the ranking system is based on data collected from more than thousand online casinos. 

If you want to see the top 100 slot ranking for another region, all you have to do is change the language in the drop down menu in the top right corner of the page. Our ranking system is based on exposure, and by that we mean the average lobby position each slot has across all the casinos we sample.

We hope you find this information useful, and you can always click on any game to get the full details and ranking calculations. We also provide all available technical data for each slot, and you can read our full slot review and play each game for free right here at SlotCatalog.

SlotCatalog's ranking over casino slots

As previously mentioned SlotCatalog`s ranking describes slot game exposure in online casinos, by region. Simply explained we crawl over a thousand online casinos daily to see what games they expose the most. During each casino crawl, we go through all the online slots that you can play in the casino. Each online slot will get an average lobby position score. This means that:

    • Higher placement in the lobby will give a stronger score.
    • If a game is absent in a casino lobby we will give it the maximum lobby position.
    • Larger online casinos have more weight than smaller ones. The weight is calculated by the geographical strength of the online casino compared to other online casinos in the same region).

This means that our ranking method is based on an average score / lobby position for each slot game. A lower average means a better, more exposed game.
Our SlotRank metric is based on all online slots average lobby position scores, but in relative terms. This means that the game with the lowest average lobby position will get SlotRank #1. The game with the second-lowest avg score will get SlotRank #2 etc.
As new games are released daily we update our ranking each day. This way we make sure that you as a player will have the latest ranking available, including the 0-day releases.

What is a slot machine?

Online slots is a term that covers a vast and diverse array of features, themes and setups, and it`s also a field that is in constant development.  One thing all casino slots have in common is that they require no real skill to play. As long as you`re able to press the spin button, you`re basically good to go.

Slot machines (both physical and online) are operated by a Random Number Generator (RNG) that`s been certified by third party agencies for fairness and functionality. The theoretical payout potential - usually called Return to Player (RTP) - can vary significantly from game to game online, but the industry average hovers around 96%. This means that the average House edge for online slots is around 4%, and thus significantly lower than most physical slot machines.

Another thing that varies a lot for online slots is something called volatility (or variance). Even though the RTP can be very similar (or even the same) for 2 slot machines, you`ll find that some games payout seldom but big, while others payout smaller wins almost all the time. There is also a middle way here, and it`s up to each player to decide what they prefer.

Generic Slot features

There`s almost no end to the creativity of game providers when it comes to slot features. Still, some basic features tend to be included in almost every online slot out there. Here we shall briefly explain these generic slot features for you.

Tells you everything you need to know about winning symbols, and the payout for each combination.

Bet Limit and Paylines
All slots have a minimum and a maximum limit for how much you can bet, but this limit can vary somewhat between each game. Usually, the limits are both low and high enough to suit most players, though. 

The number of paylines will vary between 1 and all the way up to several hundred thousand (in rare cases). Usually, there will be between 1 and 100 paylines (or ways to win as it`s sometimes called), but there are many exceptions out there too.

Wilds, Scatters and Multipliers
Almost all online slots come with a wild symbol and a scatter symbol. The wild symbol will act as any symbol (except the scatter) to maximize your winnings. The wild can come in many forms and combinations, including stacked wilds and sticky wilds (which are the most common).

A certain number of scatters (normally at least 3) randomly spread across the reels will trigger the free spins feature on most slots. A multiplier will boost your winnings by a factor of at least 2x, and can sometimes be combined with wilds.

Free spins and bonus games
The number of free spins you get will usually be tied to how many scatters you land, and sometimes you can get additional free spins by landing more scatters. Many slots also come with bonus games that can take many forms. However, some sort of click-and-pick game is common.

Video Slots

Video slots are by far the most common type of slot machines you`ll find in online casinos. They have at least 5 reels (sometimes more), and are characterized by sophisticated graphics, sound effects and sometimes 3D intros of almost cinematic quality. There are simpler video slots also, but usually they come packed with innovative bonus features and exciting special effects.

Classic Slots

Classic casino slots have 3 reels, and they are usually a lot simpler in all possible ways than the video slots. Many times classic slots will resemble - or be exact replicas - of physical fruit machines or one-armed bandits. They have a nostalgic appeal for many, but some also just prefer the simplicity the Classic slots offer.


Play Free Slots And Casino Games For Fun

Sometimes you don`t feel like risking real money to play slots or other casino games. That`s not a problem. At SlotCatalog you can enjoy a moment of joy and excitement by playing the casino games, for fun. We have the largest database of Slot Games and most of them are available in demo mode here at our site. This means you can try as many as you like, for as long as you like, without betting a cent.

No registration or download is required to play the games for free. But, some of the older games need Flash software to run.

Here is how you play a game for free on SlotCatalog:

  1. Pick the game you would like to in the list, or search for the game name or providers name in the search box up top.

  2. On the game page itself, click the button “Play for Free on SlotCatalog”

  3. Load and start the demo-game by clicking the green “Play For Free” button.

  4. Voila! The game starts and you can start spinning!

If you encounter any problem or questions regarding the play for fun functionality we recommend that you read our FAQ below. If you can`t find the answer there make sure to send us an email.

SlotCatalogs Play For Free FAQ

Different casino game types available for free at SlotCatalog

As you`ve probably guessed by the name of our company, our focus is Slots. That is by far the most common game type in our free to play arsenal as well. We have several other categories of casino games, although not as popular. The data below (11 September 2019) describes the amount of games for each game type and how many of these that are available as a demo on SlotCatalog.

Video Slots - About 10.000 of our 14.000 slots are available in demo mode.

Classic Slots - 220 out of our 240 classic slots can be played for free.

Card Games - More than 500 of our 650 card games is playable for fun.

Scratch Cards - Play 170 of 220 scratch card games for fun.

Roulette - We have demo functionality for 120 of the 200 roulette games in our database.

Other Types - 30 out of our 400 games in this category is accessable in free to play mode.

Dice - More than 20 dice games is playable in demo mode. Our database consists of 30 dice games in total.

Live Casino - Only 3 out of the 250 live casino games can be played for free.

As you can see you will find Roulette, Blackjack, Video Poker, Baccarat, Bingo and Slingo in our arsenal of demo games. If you`re looking to sort these games by one of these categories you click on “By Type” in our main menu.

Restrictions on free to play games in some countries

Most countries allow casino games in demo mode, as long as the visitor is above the legal age of gambling in that country (usually 18+). But due to legislation`s and regulations, some countries do not allow this, without certain requirements.

A proper age verification check is required to provide this service in the United Kingdom. This is why our free to play games are temporarily disabled for UK visitors. We`re working on a solution for this which is expected to role out during 2019.

Game providers with demo games at SlotCatalog

At SlotCatalog we have 290 game providers in our database. These include some of the super popular game providers like:

  • NetEnt
  • Play`n Go
  • Red Tiger
  • Playtech
  • Blueprint
  • Microgaming
  • Big Time Gaming (BTG)
  • IGT
  • Yggdrasil
  • Merkur
  • Novomatic
  • Nektan

It`s not only the well known, already established high-end game providers that are available to play for fun here at SlotCatalog. We put a lot of effort to add the demo games of the lesser-known, new studios but with just as high-quality games like:

  • All41 Studios
  • Rabcat
  • Just For The Win (JFTW)
  • Triple Edge Studios

And many more...

Technical requirements for playing the demo games

Although a lot of work has been done to phase out Flash from the web there are still older games that use this outdated technology. To play these titles your need Flash installed at your computer. Some of the new browsers (like Chrome) also requires you as a user to give permission to the site that wants to run a Flash application.

Enough about the older titles. The new games are released in HTML5 format which doesn`t require anything from you as a visitor, except a web browser. However, we recommend you to update your browser to one of the recent releases to avoid any problems.

Mobile Compatibility

Thanks to the HTML5 standard, the new casino games are playable in demo mode on your mobile devices. Without prerequisites or limitations by screen size etc.

With that said it`s not impossible to play the Flash demo games from your iOS or Android device. However, it would require you to install Flash on that device as well as a browser that supports it.

Free to play game availability at SlotCatalog

As previously mentioned we have about 14.000 casino games listed in our database. About 10.000 of them are available to play for fun here at our site.

Our content team works hard at acquiring demo games for all new releases that we add to our database. We do the same effort if the game provider is a highly established one or one of the new challenging ones. Our vision is that all games should be available for free here at SlotCatalog.

Moving over to real money

If you`ve decided that you would prefer to play the games for real money instead, you`ve come to the right place. Why? Because we guide you to popular casinos for your country. Popularity (measured by estimated traffic) is a good indicator that the casino is safe. In addition to this, we have reviews to cover most of the operators listed at our site.

That`s not all. SlotCatalog also makes sure you have the tools to find the right casino according to your preferences. You can compare welcome bonuses and properly verify that the casino in question has your favourite game providers or slot titles in their catalogue.

There are several ways to go about it when looking for the right casino for you. Either you search by bonuses, check out our casino page or if one slot game title is the most crucial to you, just search for it in our search box.

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