Best Online Slots UK

If you’re seeking to play UK slots online, we’ve put together a list of the top 10 casino slot games, casinos to play and bonuses to claim!

UK casinos offer hundreds of slot games to play online. Whether it’s new slots loaded with features, popular favourites or old classics – your average casino is packed with real money slots and free demos. But it’s tough to find the top games. So we’ve taken the time to find the best online slots of 2021, and we’ll update this list as new games get released.

Top 10 best slots and offers

The 10 best online slots UK to play right now

  • 1Lion Gold
    Lion gold Slot
    25 Payliines
    Features include Bonus Wild, Scatter, Free Spins, Re-triggers, Wild Moon, Re-spins, Super Stake and Mega Super Stake
    Play FREE or from 10p

    Play Lion Gold at Karamba Casino
    Get 100% Up to £50 + 100 Spins
    18+, new customers only, T&Cs apply, 35x wagering, min deposit £10. #AD
  • 2Valley of the Gods 2
    Valley of the Gods 2 slot
    Yggdrasil Gaming
    240 Paylines
    Features include Re-spins, Scarab Collections, Extra Lives and Wild Reels
    Play FREE or from 10p

    Play Valley of the Gods 2 at Play ojo Casino
    Deposit £10 and Get 50 Free Spins + 30 Extra Spins (No Wagering)
    18+, new customers only, T&Cs apply, 35x wagering, min deposit £10. #AD
  • 3Beast of Wealth
    Beast of Wealth Slot
    Play n’ Go
    243 Paylines
    Features include Free Spins, Jackpot, 4x Progressive Jackpots, Scatters and Beast Symbols
    Play FREE or from 10p

    Play Beast of Wealth at Casiplay Casino
    Up to £800 Bonus + 100 Extra Spins
    18+, new customers only, T&Cs apply, wagering bonus 35x, min deposit £ #AD
  • 4Artic Empress
    Green Tube
    90 Paylines
    Features include Free Spins, Expanding Reels, Wolf Wilds and Ice Reels
    Play FREE or from 20p

    Play Artic Empress at Spin and Win Casino
    100% Bonus + up to 100 Free Spins
    New Customers Only. 18+, T&Cs apply, 30x wagering on the sum of deposit & bonus, min deposit £20, Spin the wheel for 10-100 spins on selected NetEnt slots; cash out restrictions. #AD
  • 5Feline Fury
    Play n’ Go
    20 Paylines
    Features include Feline Wild, Fury Reels and Free Spins
    Play FREE or from 20p

    Play Feline Fury at Casiplay
    Up to £800 Bonus + 100 Extra Spins
    18+, new customers only, T&Cs apply, wagering bonus 35x, min deposit £20. #AD
  • 6Spartacus Megaways
    Spartacus Megaways slot
    Up to 1 Million Paylines
    Features include Wilds, Scatter, Free Spins, Megaways, Expanding Reels, Cascading Reels and High Velocity
    Play FREE or from 20p

    Play Spartacus Megaways at Cloud Casino
    Up to £400 + up to 150 Spins on Starburst
    18+, new customers only, New Customers only, First 3 deposits only, Min Dep £10, Max Bonus £400 + 150 Spins on Starburst, Selected Slots Only, 4x Conversion, 40x wagering (Bonus + Spins), Full t&c’s apply. #AD
  • 7Octopus Treasure
    Octopus Treasure Slot
    Play n’ Go
    20 Paylines
    Features include Key Re-spins, Treasure Chest, Wild Coins, Gold Pile, Treasure Grab, Wild Reels and Treasure Re-spin
    Play FREE or from 20p

    Play Octopus Treasure at Karamba
    Get 100% Up to £50 + 100 Spins
    18+, new customers only, T&Cs apply, 35x wagering, min deposit £10. #AD
  • 8Golden Glyph
    Golden Glyph Slot
    Cluster pays
    Features include Power Wilds, Free Spins, Power Up Modifiers and Tumble Feature
    Play FREE or from 20p

    Play Golden Glyph at 888 Casino
    Get £88 Free No Deposit + Up to £100 Bonus
    18+, new customers only, T&Cs apply, variable wagering, min deposit £20. #AD
  • 9The Grand Galore
    4,096 – 1 Million Paylines
    Features include Bonus Game, Free Spins, Re-spins, Expanding Reels and Stacked Re-spins
    Play FREE or from 20p

    Play The Grand Galore at Pots of Luck
    Get up to £100 Bonus + 100 Free Spins on Starburst
    18+, new customers only, T&Cs apply, 30x wagering, min deposit £10. #AD
  • 10Golden Ticket 2
    Golden Ticket 2 slot
    Play n’ Go
    Grid Payline
    Features include Cascading Symbols, Increasing Multipliers, Multiplier Wilds and Free Spins
    Play FREE or from 20p

    Play Golden Ticket 2 at BGO Casino
    Win up to 500 Free Spins on First £10 Deposit
    18+, new customers only, UK only. Win up to 500 spins from Mega Wheel on 1st deposit. 24-hour expiry. Max bet £2.50, Max Spins win £8 per 10 spins, Max Bonus win £150, selected games & 65x wagering on winnings. Min deposit £10. No Neteller/Skrill. Full T&Cs apply. #AD

How we select the Top 10 casino slot games

Online slots have a host of features – some exciting, and others less so. Use these pointers to check what features are a ‘must-have’ if you want to play the best online slots UK players could ever need.

Make sure you play slots online worth playing. Discover the 10 most important factors when selecting the top casino slot games in 2021.

Slotsquad Slots Check List
Safe and trusted UK casinos offer responsible gambling tools
Real Money and Free Play
Max Bet Vs Min Bet
Pay Table
Bonuses and Features
Quality and Speed
New Casino Offers

1. Free Play and Real Money Play

Slotsquad looks at both free online slots UK and real money games

If you’re like most of us, you’re going to end up playing your casino slot games for real money. While free play has its moments, there’s a lack of prize money and rewards when your spinning demo slots. That said, free play allows you to test an online slot before you even deposit. That’s why you’ll find hundreds of free games in our best online casino reviews UK line-up.

We give weight to new slots that come with practice play and free demos; it shows that both the casino and developer have confidence in their products/games. Importance Percentage 70%

2. Gameplay

The best UK slots online keep us coming back. We call it gameplay, and it’s what makes the difference between entertaining games and boring ones. How the slot plays is very important. This is where the developer brings together graphics, RTP, features and paytable – a combination of elements, code and mathematics that makes the magic happen; or not happen.

Gameplay is the way players interact with online slots, how the game is played, the rules and any features. The best casino slot games in the UK will offer players more than just bet and spin. Excellent gameplay is about what comes next.James | Slotsquad

Online casino slot games in 2021 offer some of the best interaction between player and paytable. It’s not just about spinning the reels and lining up three of the same symbol. That’s why we focus a lot of our attention on gameplay. The better the gameplay, then the better the features, paytable, RTP and graphics – the overall experience and potential rewards will likely be better too. Importance Percentage 90%

3. Developer

Once upon a time, slots online resembled arcade fruit machines, bandits and very basic slot machine games. But today’s best online slots are rewriting the rules with improved design, code and gameplay. If you want to build excellent slot games, you need good developers, development tools and experience. That’s why some slots developers are better than others. In 2021, we see the top UK slots come from big companies or smaller firms backed by larger investors.

Our list of the top 10 online slots for UK players to play is updated regularly. This list includes games from some of the best developers in the world – it’s important to play slots created by reputable developers. We want legit slots, licensed games and fair play on the reels, not rigged slots from unknown sources. We created this list, so you know which casino slot games you can trust. Importance Percentage 68%

Slotsquad looks at both free online slots UK and real money games

4. RTP

RTP, return-to-player is a payout percentage and the odds of winning a prize when playing online slots, FOBTs, fruit machines or other electronic gaming systems that involve waging real money. RTP is an average achieved over a significant number of game plays and not each time the gaming machine is played. That’s why you shouldn’t look squarely for the highest RTP slot games.

The best RTP slots are the highest RTP slots, or so you might think. iTech Labs is just one of the world’s independent testing agencies when it comes to audits of game outcomes. If an online casino tells you that this game is 96.5% RTP, they check. If a developer promises 98.2% RTP on this particular slot, they verify the maths.

While we do look at casino slots with high RTP numbers, we don’t pay too much attention to the value. High isn’t always better. For instance, a high volatility slot with a low RTP might be more exciting than a low volatility game with a higher RTP.

But can we trust RTP? Thankfully, as of 1 September 2016, the UK Gambling Commission requires that all remote operators (online casinos) with a UK license must monitor the performance of the games they offer. Even though games must be tested before use, over time, they might be underpaying or even overpaying players. RTP is important, but don’t always look for the highest RTP slots. Importance Percentage 59%

5. Max Bet vs Min Bet Slots

Low bet slots, max bet slots – if you’re playing for real money, betting limits come into play. But why do we look at bets when ranking the top 10 online slots in the UK? We’ll talk about the paytable, free spins bonus and features later, it’s all linked to betting; however, we’ll talk about betting limits at this point.

Max bet vs min bet slots is very much down to player preference, but the best casino slot games offer the biggest range between the two. For example, an online slot with a min bet of £1.00 and a max bet of £50 is less appealing than a min bet of £0.10 to a max bet of £500. Min bet slots are better for responsible gaming; max bet slots might attract high rollers and less conservative players.

High volatility slots with a minimum bet make some of the best slot games you can find, low volatility games with a higher minimum bet can cost players the earth to trigger even the smallest win. When we rank our top slots, we’re looking for online slots with the lots of features, but also a low min bet so that players can take their chances with less of the betting cost. Importance Percentage 83%

6. Slot Paylines

Paylines on Slot Machines

Paylines on slot machines can start from 10 and go up to many thousands; they’re also advertised as ways to win. Our best online slots UK list includes a variety of games with both high and low numbers of paylines. But remember, a slot game with 99 paylines doesn’t necessarily mean winning more prizes than you would on a game with 25 paylines.

The slot’s volatility, features and the amount given to symbols on the paytable are more important than paylines. Importance Percentage 62%

7. Pay Table

If you want to understand slot machine pay tables, it’s basically the rules of the game. Often consisting of high paying symbols, mid-paying symbols and low paying symbols, a pay table along with RTP and pay lines is the mathematical stomach of any casino slot game.

Line up three cherry symbols; it’s the pay table that awards the prize, trigger the bonus game, again you can thank the slots pay table. Pay tables will often contain bonus features, multipliers and free spins games as well.

Pay tables are the most important piece of any online slot game, especially if your playing for real money. Not volatility, not RTP, and not betting limits – as it’s the pay table that directs how much you can win!James | Slotsquad

New UK online slots in 2021 feature complex and significant pay tables, the key is finding games with more rewarding pay tables. We can now talk about the betting limit, paylines, RTP and volatility once again. To find the best slot games, we rank our list based on strong pay tables. At first, we want a good number of symbols. Second, we look at the value of those symbols. Finally, we look at the RTP, volatility, min bet and max bet.

Regardless of volatility or RTP, it’s the slots pay table and what’s on it that controls the amount of wins. RTP and volatility direct when you might win, but it’s the pay table that says how much. That’s why list our best slot games based on the pay table first, and the other factors second. A pay table is the most important thing to look at if you want to play slots online for real money. Importance Percentage 94%

8. Bonuses, Free Spins and Features

From free spins to multi-level pick and win games, the best bonus feature slots are getting an upgrade in 2021. Now more than ever before, we’re looking at the best slot bonus features when we rank online slots. Other than standard pay line wins, features are any additional part of the game that can help generate wins.

If you play slots online, online slots with bonus features are the way to go. They offer the best prizes, entertainment and gameplay. When you’re looking for your next casino slot game, consider one with lots of in-play features and extras – it changes the game completely.

You’ll find loads of games with features in our top 10 UK slots to play in 2021, including:

  • Gamble Feature Slots
  • Free Spins
  • Different game modes (see image above)
  • Multipliers
  • Stacked Symbols
  • Super Symbols
  • Tumbling Reels
  • Megaways™
  • Pick and Win
  • Random Games
  • Wild
  • Expanding Wild
  • Walking Wild
  • Nudges
  • Multiple Jackpots
  • Expanding Reels
  • Wild Reels

Importance Percentage 90%

9. Quality and Speed

When it comes to graphics and quality, resolution and frame rate are the key factors that online slots developers struggle to balance. How does the online slot look? How does it spin? Is the animation any good? How blown away are you by the visuals. With new online slots, we see smoother and more immersive graphics on screen, that’s precisely what we want. The problem with casino slot games is repetition, watching the reels spin over and over.

If you look at our best Grosvenor slots list, you’ll find some of the highest resolution games on the planet. On the other hand, our best 888 slots list focuses on frame rate. How a game looks and how a game moves are two very different things, but done well together, it can really entertain. That’s what makes our best online slots UK rankings – casino games with both a high resolution and a high frame rate. Importance Percentage 85%

10. New Casino Offers

Finally, any new casino offers related to new online slots is a good indication of quality. Whether it’s free spins, game of the month or a deposit bonus – new games won’t get the full promo treatment if the product is sub-standard. Promotions and bonuses tell us that the casino and developer have confidence in their latest release – and that it’s likely one of their best online slots UK players might find entertaining. Importance Percentage 70%