Playtech's new
Buffalo Blitz Megaways slot
New
Slots
Best
Slots
megaways-icon
Megaways
Slots
Jackpot
Slots
Best RTP
Slots
Slot
Sites

About Online-Slot.co.uk

Online-Slot.co.uk is the home of online slots in the UK. With over 4,000 slot game reviews, this is also a great resource for free slots in the UK. You’ll also find detailed online slots reviews as well as the best slot sites to play them at. Experienced player? Check out the latest slots. Newbie? Start with the best slot games in the UK.


GamblingComission GamblingComission
Chris Taylor
Playing slots since 2004

Chris is a slots expert that has reviewed and played over 10,000 slots online. Having being in the iGaming industry for over 17 years, he knows how slots work, how bonus features are triggered and how the RTP and variance affect the gameplay.

New Slots

If you want new slot reviews, Online-Slot.co.uk is the place to come to. We add the latest slot reviews as quickly as anywhere else. This includes exclusive slots and details of where to play them. We cover slot reviews from the best online slot providers including NetEnt, Play ‘n GO, Microgaming and Playtech. We also list the slots sites where the latest slots are available.

More New Slots

Best Slots

Want to read reviews on the best online slots? You’ve come to the right place. With 1,000s of online slot games to choose from these days, we’ve hand-picked only the very best for you. These are popular with casino players and we highlight the reasons why in the in-depth slot reviews. This includes the best free slots as there are demos versions of these favourite titles.

All The Best Slots

Megaways Slots

The Megaways game mechanic by creator Big Time Gaming has taken the online casino world by storm since it was made popular by the iconic Bonanza Megaways slot. With so many moving parts, our detailed Megaways slot reviews explain the engine behind our Megaways game which can vary as well as a look at the various exciting features they come with.

Megaways Slots List

Jackpot Slots

Looking for a life-changing win? Check out our list of jackpot slot games which offer you the chance to win progressive jackpots. These include games with the highest online jackpots that have 7-figure payouts.

All Jackpot Slots

Best RTP Slots

If you want the highest RTP slot games, you’ve come to the right place. Find out which slots have the best return rates which give you more winnings back per spin on average. You’ll also find a list of the best payout slots.

Top RTP Rates

The Best Slots Sites (UK)

All slot sites found here at Online-Slot.co.uk are UK licensed and trustworthy. They also adhere to the strict and fair policies set out by the Gambling Commission (UKGC). We’ve personally played at these top slot sites which have a wide selection of the best slot games.

  1. Casino Lab
    • New Slot Site -November 2020
    • Regular Promotions + Bonuses
    • Fast Withdrawals
    100%
    up to £100
    300
    Free Spins
    1,500+
    Slot Games
    T&C Apply

    18+. New players only. £10 min deposit. £5 Max Bet using bonus. 40x wagering applies. Bonus valid for 14 days. 30 spins will be credited instantly upon qualifying deposit + then 30 per day for 9 days on pre-selected games. Free spins valid for 72 hours from credit. Max free spins winnings £100. Ewallets excluded. www.begambleaware.org #ad

  2. LeoVegas Casino
    • 10 No Deposit No Wager Spins
    • PayPal Casino
    • Award-Winning Casino with Impeccable Reputation
    30
    Wager-Free Spins
    £100
    in Bonuses
    2,100+
    Slots
    T&C Apply

    New reg only. Claim 10 free spins x10p each on Book of Dead (no deposit needed) within 3 days. Opt in & deposit £10, £25 or £50 within 7 days & further 7 days to wager cash stakes 35x to unlock reward (£50 on 2 deposits). 3 day exp. Wagering/game contributions vary. 10 wager-free spins x10p to added to Book of Dead with each qualifying deposit, 3 day expiry. 18+ BeGambleAware.org #ad

  3. Betway Casino
    • Founded in 2006
    • Trusted UK Brand
    • iOS/Android Mobile Apps
    100%
    up to £50
    + 50
    Bonus Spins
    PayPal
    Accepted
    T&C Apply

    *New Customer only. Opt in required. This offer is valid for selected customers only, until 28th February 2022 23:59 UTC. 50 Bonus Spins are awarded upon successful first deposit. 100% match bonus up to £50 on 1st deposit of £10+. 10 bonus spins credited on a daily basis for 5 days. Winnings from bonus spins are subject to wagering of 30x playthrough requirements. Irregular gameplay may invalidate your bonus. Debit card deposits only. This offer is valid 7 days from when your new account being registered. Other conditions apply. 18+ Bet the responsible way – begambleaware.com. Terms apply #ad

  4. NetBet Casino
    • Up to 500 Free Spins
    • Regular Promos
    • 3,000+ Slots
    Up to 500
    Free Spins
    Regular
    Promos
    3,000+
    Slots
    T&C Apply

    18+, New players, £10+ deposit, no e-wallets/prepaid cards, up to 500 Free Spins, 40x PLT on Free Spins winnings. T&Cs apply #ad

  5. Duelz Casino
    • NetEnt, Nolimit City + BTG Slots
    • 6 minute average cashouts
    • Duelz Prizes Loyalty
    100%
    up to £100
    100
    Free Spins
    800+
    Slots
    T&C Apply

    18+ new players only. Minimum deposit: £20. Maximum £100 bonus. Max bet with an active bonus: £2. Wagering requirement 100% match bonus: 30 times sum of deposit + bonus. Max redeemable from welcome bonus: £500. 100 Free Spins are given out 20 per day on Book of Dead for 5 days in a row, log in each day is required. Max Free Spins winnings: £100. Winnings from Free Spins are credited as bonus money with a wagering requirement of 45 times. Free Spins expire after 3 days. Some games may not be played with a bonus. Games may contribute differently when wagering a bonus. Play Responsibly! www.begambleaware.org. #ad

  6. Casushi Casino
    • Play on Mobile, Tablet + Desktop
    • PayPal Casino
    • Loyalty Programme
    750 +
    Slots
    £50 Bonus +
    50 Bonus Spins
    PayPal
    Cashouts
    T&C Apply

    T&Cs: 18+. New players only. 100% bonus on first deposit up to £50 & 50 Bonus Spins (30 spins on day 1, 10 on day 2, 10 on day 3) for Rich Wilde and the Book of Dead slot only. Min first deposit of £20. Max bonus £50. Max bonus bet £5. Max bonus cash-out £250. 40x wagering requirements. Bonus expiry 30 days. Bonus spins expiry 2 days. Game restrictions apply  Further Terms Apply #ad

  7. PlayFrank Casino
    • 6 hour cashouts with no fees
    • Daily challenges & rewards
    • 1,000+ slots
    50
    Bonus Spins
    100%
    up to £100
    1,000+
    Slots
    T&C Apply

    New players only. Min deposit £20. Bonuses to a max of £100 + 50 bonus spins. Wagering bonus 35x. Wagering bonus spins 35x. The winnings must be wagered within 21 days #ad

Why Online-Slot.co.uk?

Online-Slot.co.uk is dedicated to providing the best online slots reviews. With a focus on UK slot reviews, our team of experts have worked in the online gaming space for close to 40 years combined. We work closely with slot providers so we know the thinking and all the ins and outs of a particular online slot which helps up write detailed slot reviews for you to read.

How do we conduct our slot game reviews?

Comprised of a team of slots players primarily, we’ve played thousands of casino slots both online as well as in land based casinos, pubs and arcades. As slot lovers, we look at every detail in the slot reviews to give you a details insight of how the slot game works. Our aim is to arm you with the necessary information so you can pick the right online slot for you. How’s here we review slots:

Slot Providers/Developers

We only write slot reviews on the best and most reputable slot providers. They all need to be trustworthy and licensed by the Gambling Commission. For example, we cover over 40 providers like NetEnt, Play ‘n GO, Microgaming and IGT (amongst others).  New and upcoming providers are also covered if they bring slots that are worthy to the table.

If you take Big Time Gaming for example, they were unknown only a few years ago. Since the introduction of the Megaways engine, they have become a household name and have licensed their innovation to other and bigger providers. In 2020, they released their first Megaclusters slot (Star Clusters Megaclusters). With other providers keen to create their own Megaclusters slots, it will lead to top slots which are innovative and enjoyable.

Slot Details

A slot review will firstly look at the number of reels and paylines. You will mostly find 5 reel slots with between 10 and 243 ways to win. Slot developers are working out new engines and ways to give payouts to players so have more rows, reels and symbols on the reels with some games offering over 1 million ways to win. Providers like ReelPlay have developed an Infinity Reels engine where the number of reels is, well, infinite.

Other slot review details include the stake limits (pretty self-explanatory), the Return to Player % (what you will get back in theory), hit frequency (how often you land a win) and the variance or volatility. The latter is important as some players want to make their balance last as long as possible whilst others are looking for that big payout. This leads up to the max win or max payout which is the most you can win from a particular spin or bonus feature. We also explain how that can be won.

Lastly, we look at whether an online slot game can played across multiple devices. With most games now been made using HTML5 technology, they are all available on iOS, Android and Windows operated devices. Some providers, like 4ThePlayer for example, have developed Portrait Mode versions of their games so they look better and occupy more space on smartphone screens.

Theme, Graphics & Audio

Whilst an online slot may have the best bonus features ever made and been creating by a top provider, a slot game needs to be appealing visually primarily. This depends on personal preferences of course with some players liking high definition graphics and animations and others opting for classic slot machines that remind them of an experience at a land based casino or arcade.

Our slots reviews look at the theme (such as ancient Egyptian, Norse mythology, Irish luck) and what they are inspired wise graphically. Some themes will tell a story behind the slot which captivates players which makes them come back for more. A classic example is Microgaming’s Immortal Romance which tells a dark story of love and intrigue. It’s 1 of the most popular slot games ever.

A certain themed slot will have symbols to match. With technology advancing all the time, the quality of the graphics has improved drastically over the last few years. This lead to an immersive playing experience and provides much more than just a slot game. The soundtrack/audio is an important factor as this reinforces the theme and adds to the playability.

Bonus Features & Mechanics

Whilst classic casino slots had 1 or 3 paylines and a limited number of paylines, newer slots have various ways to win. As a result,  bonus features are a vital part of a slot’ appeal. Most slot games offer free spins of some variety and wild symbols.

The most popular slots come up with some unique and innovative to make them stand out from the crowd. For example, the Megaways engine from Big Time Gaming unleashed bonus features never seen before. Other providers like NetEnt and Play ‘n GO regularly introduce new types of wild symbols into the mix which add to the excitement of a release. Our slot reviews look at all bonus features, what they can pay out and the mechanics and engines behind them.

Slot Review Analysis/Verdict

At the end of our slots reviews, we combine all the elements above and bring it together to give our feedback on the slot game. This can be good or bad as not all slots are great or amazing. Reputable providers still release slots that are simply unappealing. Whilst we tend to focus on the best slot reviews, we compare to similar titles and provide our recommendations if you’re looking for games that offer a similar bonus feature or theme.

Free Slots

Alongside our extensive online slots reviews, you will find free slots. This means you can play slots for fun here at Online-Slot.co.uk. This gives you the chance to sample the best slots to play and get a feel for when you play for real money at your chosen slots casino.

With over 4,000 online slot games available, finding the right one(s) can be daunting. You can play demo versions before visiting an online casino to see if you like it or not. With no download or signing up to complete, you can browse at your leisure and spin away till your heart’s content.

The play for fun free slots are exactly the same as you’d find at an online casino site so you can play without losing any money in order to find the right game for you. Obviously it’s play money so you can’t cashout your winnings but it gives you the chance to play your favourite slot when you like or try something new. If your balance reaches zero, just refresh the page to play again, and again.

With new slots being released daily, new concepts, themes, bonus features and game mechanics are being released all the time so our free demo slots are a good way to keep on top of new innovations.

In summary, Here are 10 reasons why should try our demo slots:

1 Spin the free online slots to see if you like it or not
2 See how the graphics, animations and theme look
3 Inspect the paytable and rules
4 Sample the bonus features and gameplay
5 Free play slots allow you to become familiar with the game before playing for real money
6 Try the free play slots on desktop, mobile or tablet devices
7 Play the most popular slots online
8 Try brand new free slots
9 The free slots are no download
10 Play Vegas slots online

How to Play Slot Demos at our Free Online Casino

1 Visit the Online Slots page
2 If you have a slot game in mind, use the Search function
3 Click on the New Slots tab to find the latest releases
4 Click on the Best Slots tab to access the most popular slot games
5 Click on the Megaways Slots tab to find all games using the Megaways engine

Perhaps you want the slots with the best payouts. Our best RTP slots page gives you the 10 games with highest return to player rate. The RTP rates are all above 97.71%!

Free Mobile Slots

Touched on above, more and more players are playing free slot games on their mobile and tablet devices. All our demos are available to play across multiple devices that use iOS, Android and Windows operating systems. You can of course play free slots on your desktop device such as your laptop, Mac or PC.

With most slot games being produced using HTML5 technology, you can enjoy free slots for fun wherever and whenever you desire. Some slot providers are now mobile-first meaning they have mobile slot players are the forefront of their minds when it comes to production. This means more enjoyable playing experiences, sharper graphics and better functionality and gameplay.

Free Jackpot Slots

Whilst jackpot slots are found on our site, playing demo slots doesn’t allow you to win the progressive jackpots on offer. As you’re playing for free, the jackpots sometimes won’t show or won’t be available to win. With the exception of the Mega Moolah slot (Microgaming doesn’t allow players to play for free), all jackpot slots can be played for fun here at Online-Slot.co.uk.

Free Vegas Slots

Ever played slot games in land based casinos (like Las Vegas), arcades or pubs? Known as Vegas slots or slot machines, there are plenty of Vegas favourites here at Online-Slot.co.uk. Classics such as Rainbow Riches, Zeus, Cleopatra and Raging Rhino can be played for free.

Free Slots Age Verification (UK)

If you’re playing in the UK, you will need to verify your age before playing demo slots online. As of the 7th of May 2019, the Gambling Commission stipulates that affiliate sites must ensure that they have verified the age of any customer before they can access to free slot games.

Online-Slot.co.uk is proud to have been the first slots portal in the UK to introduce age verification. We’ve teamed up with age verification solution Verime to provider a simple and free process for all our UK visitors. When you open up a free slot page, here’s what you need to do:

1 Click on the blue Verify Age button
2 Enter your UK mobile number
3 Check your text messages + reply with ‘VERIFY’
4 The demo slot should load within a few seconds

As mentioned, our age verification process is free and only needs to completed once. If you come across the verification popup again, enter your mobile number and the free play slot will load automatically.

Slot Sites Rankings

Now you’ve found the slot games you want to play, you’ve read the details reviews and tried in demo mode, you need a place to play them at. With a clear focus on the games, we recommend the best slot sites for UK players.

With years of playing slot games online, we take our slot site reviews very seriously as this is where ultimately you’re going to be enjoying the games themselves. Our focus is to provide clear and accurate information on the following aspects:

  • Slots Offering: we look at the range of slot providers and the games available. A slot site needs to have a wide range of titles to play from the most reputable providers. Regular new releases are also just as important as the most popular/best ones. Some slot sites are better for certain slots – for example: Paddy Power Casino specialises in Playtech games whilst NetBet Casino has a range of providers. This is something we consider in our slot sites rankings.
  • Bonuses + Promotions: the better slot site reviews will have lots of details on promotions, bonuses and offers for players. You’ll be happier at a site that focuses their attention and efforts on slot games rather than table games like blackjack for example. Those slot sites with slot tournaments, free spins, leader boards and cash giveaway fair highly with us.
  • Payment Methods + Withdrawal Times: whilst playing slots is what we want to do, winning is the ultimate aim. Whilst we can’t always win, making sure you can withdraw your funds when you do win is just as important. We look at the major options for depositing and cashing out as well as how long it takes to withdraw and if they are any other things to consider such as pending periods and fees.
  • Customer Support: playing at slots sites with good customer service is important. If you have any issues or queries, you want to be able to get in touch and get an adequate response quickly. Testing a site’s responsiveness indicates how well they treat their customers.
  • Track Record with the Gambling Commission: all slot sites here at Online-Slot.co.uk are licensed and regulated by the UK Gambling Commission. That’s not enough though. We look at their reputation, if they’ve had any issues in the past and how they conduct themselves in regards to responsible gaming and compliance.

New Slot Site Reviews

You may be a seasoned player and have played at the top slot sites recommended here at Online-Slot.co.uk. In that case, you should consider our new slot sites.

With a UK focus, new slots casinos are reviewed more critically than established brands as they don’t have the longevity and reputation of older sites. We look at anything new they bring to the table including specialised promotions, new slot providers and slot games, more payment methods and mobile apps/sites.

We also go behind what you see and delve into the companies behind these new slots sites. It’s important to know where a new slot site is a white label, a new brand from an established operator or a brand new site with a good reputation in other markets.