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Top 10 Best Slots

The best online slots to play are generally the most popular ones. Slot players are nostalgic as many online players like playing slots they can find in land-based casinos. Lots of land-based games are available to play online which players keep coming back to time and time again.

Here, we look at the top 10 most popular online slots in detail including why they are the best slot games. You will see most of them appear at the top of slot sites lobbies. Let’s dig a little closer:

San Quentin (Nolimit City)


Based on the notorious Californian prison, the San Quentin slot is by Nolimit City. With 5 reels and starting with 243 ways to win, it uses the xWays mechanic. There are Enhancer Cells which can display Razor Split symbols to give you more ways to win (up to 46,656).

San Quentin focuses on the Lockdown Spins feature where Jumping Wilds come into play. They come with a multiplier that can double all the way up to 512x if they manage to land on reels where Razor Split symbols appear.

With a 96.03% RTP and a hit frequency of 34.25%, this extremely volatile slot offers max wins of 150,000 x your total stake per spin. Released in January 2021, the huge win potential and the controversial theme makes San Quentin a must-play slot.

Book of Dead (Play ‘n GO)

Book of Dead slot Play 'n GO

Treasure hunting is one of the most popular themes in the online casino world and they don’t come more popular than the Book of Dead slot. Created by Play ‘n GO, the action here centres on the Indiana Jones-style adventurer Rich Wilde and his quest for ancient Egyptian riches.

Played using 5 reels and 10 paylines, the highlight as far as gameplay is concerned is the Free Spins feature that begins with 10 free spins. During those free spins, 1 symbol is chosen at random to become the special expanding symbol. Whenever this symbol hits, it expands to fill the whole of the reel.

Extremely volatile, it’s the simplicity that makes Book of Dead so popular. Land a high value special expanding symbol and you could be in for some payouts. However, don’t expect to win all that often. The rewards can be big when you do though. The maximum win stands at an impressive 5,000 x your stake from a single spin. Featuring classy sound and visuals, this is one of the best online slots to play if you enjoy the ancient Egyptian theme.

Starburst (NetEnt)

Starburst slot NetEnt

Many online slot players like a wide variety of extras to keep things fresh. Others prefer something a bit more straightforward. The massively popular Starburst slot sits in the latter category.

This sci-fi-themed classic comes from NetEnt and is played using 5 reels, 10 paylines and win both way technology. This isn’t a game that’s overloaded with extras. The action is based on the expanding wilds which can appear on the middle 3 reels and then award a re-spin with the stacked wild locking in position. It’s possible to fill all 3 middle reels with wilds which can lead to some potentially spectacular action.

Simple, mesmerising and massively popular, Starburst is a staple of many online casino welcome bonus offers. If an online casino new player package comes with free spins included, there’s a high chance that they’ll be for Starburst which remains one of the best slot games to play. It’s an old game but most definitely a classic.

Immortal Romance (Microgaming)

Immortal Romance slot Microgaming

This vampire romance mash up first hit the online casinos shelves in 2011 but its brand of epic back story, fantastic features and potentially massive payouts mean that the Immortal Romance slot remains among the best online slots.

Created by Microgaming, it’s a 5 reel, 243 ways to win title that comes with a quartet of free spins features which are based on each of the slot’s main characters. These come with modifiers including multipliers of 5x or 6x, rolling reels and wild transformations.

The maximum win from a single spin here is a whopping 12,150 x your stake. Highly volatile, the Immortal Romance RTP is 96.86% which is one of the best online slots payout percentage around. Come Halloween time or any other time of the year, Immortal Romance is a must play.

Bonanza Megaways (Big Time Gaming)

Bonanza Megaways slot Big Time Gaming

Big Time Gaming’s Megaways mechanic has been a real game-changer in the online slot world and there’s no better example than the Bonanza Megaways slot. The goal here is to go mining for treasure on reels where the number of symbols changes with each spin.

If you get the maximum number of symbols on all 6 reels, you’ll have an enormous 117,649 ways to create a winner. After a winner is formed, a ‘reaction’ takes place and the successful symbols are removed and replaced by new ones to give you another shot at creating a winner. The ‘reactions’ keep on coming as long as a new winner is formed.

The main extra is the Free Spins feature. Each time you land a ‘reaction’ win during the free spins, a multiplier increases by 1. There’s no limit to how high the multiplier can go and how many free spins you can play with. Medium to high variance and with 10,000 x stake wins per spin possible, Bonanza Megaways is one of the original and best online slots with the Megaways mechanic.

Age of the Gods (Playtech)

Age of the Gods slot Playtech

Ancient Greek myth and legend has provided plenty of inspiration for game developers, none more so than Playtech which is the software provider behind the epic Age of the Gods series. The flagship game is the Age of the Gods slot which was also the first release from the series.

This 5 reel, 20 payline games centres on Athena, Hercules, Poseidon and Zeus. Each of the quartet of ancient deities comes with their own free spins feature, complete with a special modifier. These include an assortment of multipliers, added wilds and stacked wilds which can deliver some massive awards. The max win is 7,000 x stake per free spin.

You’ll also have a shot at landing 4 progressive jackpots via the Age of the Gods Jackpot feature. The Ultimate Power Jackpot averages a payout of £488,000 every 45 days.  

This fantasy-themed epic has spawned a whole tranche of sequels. Common to all of them is superb sound and visuals, top features and of course, the potential riches on offer from the progressive jackpot network. When it comes to popular franchises, Age of the Gods is among the best online slot series you’ll find.

Dead or Alive 2 (NetEnt)

Dead or Alive 2 slot NetEnt

If you like high risk, high reward action, you won’t find many better slots than the Dead or Alive 2 slot. This virtual trip to the Wild West comes with volcanic volatility and offers enormous payouts of up to 111,111 x your total stake.

Boasting NetEnt’s usual design flair, this sequel is played using a 5 reel, 9 payline game engine and features outlaws Apache the Kid, Della Rose, Jesse James, Bell Star and Billy the Kid on the reels. Gameplay highlights are the 3 free spin rounds.

In the Old Saloon Free Spins feature, all payouts are doubled and wilds are sticky. The sticky wilds and multipliers can combine in the High Noon Free Spins feature. For example, 2x and 3x multiplier wilds deliver a bumper 6x boost. The wilds in the Train Heist Free Spins feature aren’t sticky but they do increase a multiplier by 1 each time they appear.

With its sky-high variance, Dead or Alive II has become a real cult favourite. With the potentially massive rewards on offer, it’s easy to see why.

Gonzo’s Quest (NetEnt)

Gonzo's Quest slot NetEnt

It might be have been NetEnt’s first Platinum release in 2011 but the Gonzo’s Quest slot is still among the best slot games to play online. The action centres on Gonzalo Pizarro, aka Gonzo, and a group of Spanish conquistadors on a hunt for Amazonian treasure and a lost city of gold.

Played using Avalanche Reels, winning symbols are removed following a successful spin and are replaced by new ones. Avalanches continue until no new winner is created. Successive avalanches bring multipliers of 2x, 3x and 5x into play.

Trigger the Free Fall feature and you’ll get 10 free spins. The multipliers on offer during the feature are even bigger, boosting payouts by 6x, 9x and 15x. Those multipliers take the maximum win in the Gonzo’s Quest free spins round up to a whole new level. The top payout is 37,500 x your total stake with the potential 15x multiplier.

Gonzo remains one of the most enduringly popular slot characters around. So much so, that a Gonzo’s Quest Megaways slot hit the online casino shelves in 2020.

9k Yeti (4ThePlayer)

9k Yeti slot 4ThePlayer

Sometimes you look for a slot that offers good value and when it comes to RTP rates, the 9k Yeti slot is up there with the best. This maiden release from 4ThePlayer comes with an impressive return to player rate of 97% which is one of the best online slots payout percentages.

That on its own probably wouldn’t be enough to give 9k Yeti a best slot games tag. Thankfully, it comes with top-drawer design as well as some cracking extras. With the setting being Mount Everest, it’s a 6 reel, 4,096 ways to win game.

The highlight is the Snowstorm Free Spins Bonus feature where you can look forward to 8, 15, 40 or 88 free spins initially. You can also win more free spins with up to 880 free spins in total. The other extra is the Snowstorm feature. This can hit on free spins that include Yeti and wild symbols but don’t result in a winner. A storm blows across the screen, shifting symbols in its wake to create a new winning combination.

The 9k Yeti max win is 9,012 x stake per spin which is high. You can also play using 4ThePlayer’s Big Reel Portrait Mode where the reels are stacked to occupy 60% of your mobile screen. Volatile with a high RTP and a couple of top features, 9k Yeti is among the best slots UK players can pick.

Jammin’ Jars (Push Gaming)


Get on the dancefloor and get into the groove with the Jammin’ Jars slot. Played on an 8×8 grid and using a Cluster Pays engine, you can spin away from 20p a spin across all devices. When get a winning cluster of 5 or more matching symbols, you will get a collapse. The collapses continue as long as you get a new winning combination.

A cult favourite amongst slot players, it has a 70s disco theme and comes with an upbeat soundtrack. When you get a losing spin, a rainbow appears and adds a colossal fruit symbol to the reels. Known as the Rainbow feature, matching symbols attached to the colossal symbol which can give you a win.

There are also Jam Jar wilds that shift to random positions when part of a win. Called the Jam Jar Multipliers feature, each cascade sees the multiplier increase by 1 each time, with no limits.

Then you have the Free Games feature where the multiplier increases with each collapse. Any base game multipliers are carried over and can only increase. This can lead to 20,000 x stake wins on each spin. Jammin’ Jars also boasts a high RTP rate of 96.83%.

Features of the Best Slots

There’s a massive variety of themes to pick from when it comes to online slots. From historic China to buccaneering pirates, futuristic space stations to ancient Rome, there’ll be a game with that theme.

What makes a slot a good one though? Take ancient Egypt for example. Players have an enormous number of slots with that theme to choose from. What makes one more playable than another? Personal preference comes into it of course but there are other factors to weigh up too, which we’ll look at in more detail below.

High Variance Slots

When considering whether to play an online slot, 1 of the most important factors is variance. Does a slot deliver a steady stream of small value wins? Or is it volatile? These slots might offer wins very rarely but they have the potential to be big ones on the rare occasions they hit.

The high risk but potentially high rewards on offer from volatile slots sees many of them develop cult status. They’re certainly chancy but if luck is pointing in the right direction, they can deliver some knockout action.

High Max Win

Closely tied in with high variance slots are those that offer how maximum payouts or max win. The big rewards have made these some of the most popular slots around. Players love to chase huge wins and the bigger the potential rewards, the more appealing they become.

Take for example, Dead or Alive 2. It might not be the most innovative slot in the world but the fact that one of its features has a maximum win of 111,111 x your total stake means that it’s become one of the best slots online and a firm fan favourite.


Players who will be staring at a screen for a decent amount of time want something that’s easy on the senses. Many of the best slot games come with high-class sound and visuals. Players expect more than ordinary bars, bells and oranges found in an old-school fruity.

Combine impressive design with high variance and big win potential and you’re well on the way to creating a classic. Immortal Romance is a prime example. Packed full of back story, it has its own uniquely-developed soundtrack. It also offers super volatile gameplay and potentially massive payouts. Put that together with the classy sound and visuals and you can see why it’s become one of the best slots to play online.


For the uninitiated, the RTP is the Return to Player rate. That is, the amount that a slot pays out on average. The higher the percentage figure, the more that the game returns. For example, a slot that has a 96% RTP pays out £96 out of every £100 wagered.

Most slots have an RTP of round about the 96% mark. There are some outliers in both directions though. Some jackpot slots can have a lower RTP rate. Slots with an RTP of in excess of 97% are understandably popular with slot players.

9k Yeti has a 97% RTP. Set sail on a voyage in 1429 Uncharted Seas and the RTP is a massive 98.6%. You can usually find a slot’s RTP in the paytable or game info section. Is the return to player % a factor for you? Check out the best RTP slots.

Bonus Features

Some players are happy with slots that hammer home a limited range of extras (like Starburst). Others demand more in the way of bonus features. Thankfully, there are loads of online slots available that offer both styles.

Take Playtech’s Age of the Gods slot for example which comes with 4 different free spin features, each one based on one of the ancient deities. They all offer decent winning potential too.

Other examples of the best slots for features include games from Blueprint Gaming. Take Ted for example. Based on the hit movie about the foul-mouthed talking bear, starring Mark Wahlberg, it’s brimming with base game modifiers and a massive collection of triggered features.


Slots have come a long way from their one-armed bandit roots. We still enjoy playing a simple, classic fruity from time to time but most players expect a bit more in the way of originality.

The best slots deliver that in spades. The prime example in recent years has been the explosion in popularity of slots using the Megaways game mechanic. Big Time Gaming isn’t resting on its laurels though. The developer behind Megaways has also launched the Megaclusters and Megaquads game engines.

Another good example of innovation is ReelPlay’s Infinity Reels game engine where an extra reel is added with each successive win. The best slot games often feature the best new gameplay.


The goal of many slots players is to scoop an enormous, life-changing sum. With their multi-million pound paydays, progressive jackpot slots certainly offer that. NetEnt’s Mega Fortune and Microgaming’s Mega Moolah might be relative veterans but their eye-watering jackpots mean that they remain some of the most popular slots in UK.


More and more people are giving up on their desktop computers and using ever more powerful tablets and mobiles as their primary devices. The online gaming world has kept up with these technological changes to create superbly designed slots that are fully optimised for mobile play.

A prime example of this comes from developer 4ThePlayer which has created the Big Reel Portrait Mode which uses 60% of the screen for the game interface. They are some of the best slots for iPhone you’ll come across.

Land Based to Online

Many of the best online slots available started life as land-based slots found in casinos, arcades and pubs and bars up and down the land.

Some of the top rated slots are ones that have been around long before online slots even existed. Some players will stick to the games they’ve played for years and even decades.

The likes of IGT’s Cleopatra, Barcrest’s Rainbow Riches and WMS’ Zeus all became popular in live venues before making the transfer to the online slot world. These are the best slots in Vegas meaning their online presence remains constant.

Best Slots FAQs

What are the best slots?

The best slot games are down to your personal preferences. Some prefer games with high win potential whilst others like ones with superb design. Check out the most popular slots in the UK which offer a variety of different attributes.

What makes a good slot game?

Different elements of an online slot appeal to different players. Some like high variance games whilst others like ones with high RTP or an innovative game mechanic. Check out the 9 features of the best slots you should consider before you play.

What are the best slot games for iPhone?

Nowadays, all slot games can be played across various devices including smartphones and tablets. All our best slots can played on Windows, iOS, Android and MAC powered devices, including iPhones.

Which online slots payout the most?

The best slots in the UK tend to be the ones that offer big potential payouts. Games like Dead or Alive 2, Bonanza Megaways and Book of Dead can pay out huge stake multipliers from just 1 spin. Check out our list of the best slot games where most of them are popular due to the max win they offer