If you want to know what are the best online slot games. Here at ThumbUpBonus, we are dedicated to providing our readers with the greatest and latest information on all of the best online slot games and sites! No matter whether you are brand new to spinning the reels of slot games or are a seasoned pro, slot games are for players of every budget and skill level.

Our site provides both new players and regular slot players with all the resources that they need to find their new favourite online slot game. Hopefully, our site will provide you with all the inside info that you need to choose the best slot games for you.

The Best Online Slot Games UK

When it comes to playing the best online slot games, there are a few standout games that are widely renowned in the online gambling industry. These games are incredibly popular due to their brilliant graphics, exciting bonus features, and, of course, the huge cash wins that you can potentially make when you spin their reels! We have done our research and put together for you our list of best slot games.

Starburst – 5 reel, 10 pay-line slot by NetEnt

best online slot game- Starburst Slot

Love it or hate Starburst is one of the casinos most popular slots. Blast off into outer space and enjoy the bright and colourful stars that will explode to provide you with massive wins. NetEnt’s Starburst slot is a huge favourite among slot players, with many online casinos offering free spin bonuses with this game. It doesn’t have a fancy round like many other slots but nonetheless, most players love it.

What makes Starburst so fun and unique is that the win lines run from both left to right and right to left, meaning extra chances of winning. With a 96.1% payout, Starburst also has a re-spin feature which is activated when the wild symbol lands on reels 2,3 and 4.

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Guns N Roses – 5 reel, 20 pay-line slot by NetEnt

best online slot - Guns N Roses Slot

Another NetEnt great, Guns N’Roses. Players can rock out with this legendary rock band as they welcome you to their slots jungle. Enjoy their back catalogue of music as you spin the reels. This is an all around insane slot with great features and of course great music (that’s if you’re into that genre of music). There’s a lot that can happen in this slot from The Crowd Pleaser bonus, the Encore Free Spins, legend spins, Solo Multiplier and Expanding Wilds and classic concert footage.

There’s a lot that can happen in this slot from The Crowd Pleaser bonus, the Encore Free Spins, legend spins, Solo Multiplier and Expanding Wilds and classic concert footage.


Gonzo’s Quest – 5-reel, 20 pay-line slot by NetEnt

best online slot - Gonzo Quest Slot

Join Gonzo on his South American adventure to find lost cities and big cash treasures. Expect exciting bonus features and the famous rolling reels. The graphics on this slot are amazing, you really do feel the ancient Aztec theme through the game play. What players like the most about Gonzo’s Quest is the game’s solid and unique tumbling reels and free falls bonus game. This 3D slot is certainly entertaining!

What players like the most about Gonzo’s Quest is the game’s solid and unique tumbling reels and free falls bonus game. This 3D slot is certainly entertaining!


Siberian Storm – 5 reel, 720 pay-line slot by IGT

best online slot - Siberian Storm Slot

Brace the cold winds of this IGT slot game to take home a big cash prize. With re-triggerable free spins and 720 ways to win, this is a game that you won’t want to miss out on. This is a very popular land based casino slot which has made the jump into the online slots world and has kept its popularity. its layout isn’t what you’d expect with the non-standard 3, 4, 5, 4, 3 reel layout. As mentioned what makes this slot popular is the 720 pay-lines, most common slots can vary from 20 to 100 pay-lines, which give you more chances of winning. If you haven’t played this before we definitely recommend giving it a try.

This is a very popular land based casino slot which has made the jump into the online slots world and has kept its popularity. its layout isn’t what you’d expect with the non-standard 3, 4, 5, 4, 3 reel layout. As mentioned what makes this slot popular is the 720 pay-lines, most common slots can vary from 20 to 100 pay-lines, which give you more chances of winning. If you haven’t played this before we definitely recommend giving it a try.

If you haven’t played this before we definitely recommend giving it a try.

As mentioned what makes this slot popular is the 720 pay-lines, most common slots can vary from 20 to 100 pay-lines, which give you more chances of winning. If you haven’t played this before we definitely recommend giving it a try.


Night Out – 5 reel, 20 pay-line slot by Playtech

best online slot game - Night Out Slot

If your ideal night out consists of a few drinks and a boogie on the dancefloor you will love spinning the reels of this Playtech slot game. Night Out slot is a classic online slot and is definitely one of Playtech better slots despite it being old. Night Out slot despite its feminine look at feel is a great slot for both girls and guys. Night Out slot has really good graphics (as are all Playtech casinos), the good game features with a free spins and bonus rounds. Players like this slot because you don’t need more than 20p to have a big win, also there are lots of regular wins (even though they are small) which makes this slot great to whiz through your wagering requirements.

Night Out slot has really good graphics (as are all Playtech slots), the good game features with a free spins and bonus rounds. Players like this slot because you don’t need more than 20p to have a big win, also there are lots of regular wins (even though they are small) which makes this slot great to whiz through your wagering requirements.

Players like this slot because you don’t need more than 20p to have a big win, also there are lots of regular wins (even though they are small) which makes this slot great to whiz through your wagering requirements.

Night Out slot has really good graphics (as are all Playtech slots), the good game features with a free spins and bonus rounds. Players like this slot because you don’t need more than 20p to have a big win, also there are lots of regular wins (even though they are small) which makes this slot great to whiz through your wagering requirements.


Jack Hammer – 5 reel, 25 pay-line slot by NetEnt

best online slot game - Jack Hammer Slot

Delve into this fun comic book adventure as you take on the bad guys to bag yourself a giant win. Jack Hammer slot is unique in the fact that all 15 positions are their own separate reel making each spin even more random. The re-spins feature is what is most appealing and could boost your wins considerably, this happens when you hit a winning pay line, the winning symbols stick in place will the rest re spins, this continues every time there is a winning line. The free spins bonus round is also very appealing whereby you can win between 10 to 30 free spins, with all winnings won on the feature tripled.

The re-spins feature is what is most appealing and could boost your wins considerably, this happens when you hit a winning pay line, the winning symbols stick in place will the rest re spins, this continues every time there is a winning line. The free spins bonus round is also very appealing whereby you can win between 10 to 30 free spins, with all winnings won on the feature tripled.

The free spins bonus round is also very appealing whereby you can win between 10 to 30 free spins, with all winnings won on the feature tripled.


Immortal Romance – 5 reels, 243 pay-line slot by Microgaming

best online slot game - Immortal Romance Slot

Everyone loves a vampire romance and Microgaming are bringing this love story to you alongside big cash wins in a slot game format. Immortal Romance a slot which will never get old and is arguably Microgaming’s most popular online slot, a true slot player favourite and widely available at almost all online casinos.

There are 4 types of free spins features, the first despite only 10 free spins has a multiplier of 5x, meaning all winnings won at times by 5.


The Invisible Man – 5 reel, 20 pay-line slot by NetEnt

best online slot game - The Invisible Man Slot

NetEnt brings players this fun slot based on the classic 1933 film of the same name. Enjoy wilds, free spins and lots of bonus features! The Invisible Man slot has everything from great graphics and animations to decent payouts and great bonus rounds. This slot also payouts both ways just like Starburst Slot.

The bonus is unlocked when the Invisible Man symbol appears on the fifth and the policeman symbol on the first reels you activate 5 re-spin.

This is a great slot game which we are sure you’ll enjoy!


Pamplona – 5 reel, 1024 pay-line slot by IGT

best online slot game - Pamplona Slot

This game is based on the world famous bull run and you can grab up to 30 free spins and a huge multiplier!

There are 1024 lines in this game and only one feature, the El Toro Bonus which is what makes this game so popular. the El Toro Bonus allows you to choose one of 5 options containing a certain number of free spins with a determined multiplier, you can choose from 5 free spins with 20x, 10 free spins with 15x, 15 free spins with 10x, 20 free spins with 5x and 30 free spins with 3x more multiple.

All in all is a unique themed slot with a great bonus round and great potential to generate some good profits.


Book of Ra – 9 reel, 5 pay-line slot by Novomatic

best online slot game - Book of Ra Slot

Spin the reels of this Novomatic slot game which takes you back to ancient Egypt to discover the Book of the Dead and grab yourself a big cash win.

This is the only Novomatic slot game you need to know about and the slots makers top game. when it comes to features, look and feel its pretty basic, but we have seen some big wins with this slot, and that why it’s so popular! if you manage to hit the bonus round the game could offer winnings of x 2000.

Not the most standout game but certainly worth the punt to win big.


Thunderstruck 2 – 5 reel, 243 pay-line slot by Microgaming

best online slot game- Thunderstruck 2 Slot

This is one of the best slot games ever. Microgaming takes you on a Norse Mythology themed adventure where you can meet the Nordic Gods Odin, Loki, Valkyrie and Thor. It’s almost identical to Immortal Romance regarding features and bonus round. Big wins on this slot are what make it extremely popular.


Gladiator – 5 reel, 25 pay-line slot by Playtech

best online slot - Gladiator Slot

The fascination with Rome and the Gladiator fighting pits continues with this game from Playtech which offers you up to 50000x your wagering bet. The theme is a big and appealing hit to all slot players and is the best roman themed slot out there. what makes this slot an all time favourite is the free spins bonus round which has huge potential for a big win.


Cleopatra – 5 reel, 20 pay-line slot by IGT

best online slot game - Cleopatra Slot

Turn back the sands of time and visit the last Pharaoh of Egypt with this exciting game that also includes a massive jackpot prize. This slot is a big favourite both online and in main land casinos.

When this game online to become an online slot game, it was ground breaking, it was one of the first slots to combine big wins, free spins and multiplied winnings. Good wins ins both in free spins and in normal play is what keeps this slot extremely popular.


What to Expect from the Best Online Slot Games

Online slot games started off simply mimicking the classic land-based counterparts and players could expect to find retro symbols on their reels including cherries, melons and lemons. These slot games are still incredibly popular today, however, they can seem a little dated compared to the latest major slot game releases.

Players will tend to find that all of the best online slot games come from a few key developers. This includes big hitting names in the gambling industry such as NextGen, NetEnt, Blueprint Gaming, Thunderkick, Rabcat, IGT, Microgaming and Playtech. The number of slot games available to play online has exploded in recent years due to the advancements in technology that these gaming developers have brought to the table. The best slot games are fast, feature high-quality graphics, amazing sound and incredible bonus features, many of which are unique to the game that you are playing and will help you make massive wins!

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2.8 / 5
TOTAL SCORE

100% up to £200+ 200 Free Spins

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18+ Full T&C's Apply. New players Only. £10 min deposit. £5 max bet using bonus. 40 x wagering applies. Bonus valid for 14 days. 20 Spins on Starburst will be credited per day for 9 days after qualifying deposit/wager is met. Free Spins valid for 72 hours from credit. Max Free Spins winnings £100. Skrill + Neteller excluded. Always refer to Bonus Terms - www.begambleaware.org
38
3.7 / 5
TOTAL SCORE

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18+. New players only. One bonus offer per player. Minimum deposit £20. Max bonus bet is £5. Bonus spins on selected games only and must be used within 72 hours. Bonus funds must be used within 30 days otherwise any unused bonus shall be removed. Bonus funds are 100% match up to £300 on your 1st deposit, 50% match up to £500 on your 2nd deposit, and 75% match up to £500 on your 3rd deposit. Bonus funds are separate to Cash funds, and are subject to 35x wagering the total bonus & cash. Only bonus funds contribute towards any wagering requirements. Terms apply. BeGambleAware.org.
39
2.6 / 5
TOTAL SCORE

100% Welcome Bonus up to £300 + 50 Bonus Spins

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18+. New players only. One bonus offer per player. Minimum deposit £20 Max bonus bet is £5 Bonus spins on selected games only and must be used within 72 hours. Bonus funds must be used within 30 days otherwise any unused bonus shall be removed. Bonus funds are 100% match up to £300 on your 1st deposit, 50% match up to £250 on your 2nd deposit, and 100% match up to £250 on your 3rd deposit. Bonus funds are separate to Cash funds, and are subject to 35x wagering the total bonus & cash. Only bonus funds contribute towards any wagering requirements. Terms apply. BeGambleAware.org
40
3.4 / 5
TOTAL SCORE

1 Free Spin For Every £1 Deposited (Max 50)

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First Deposit Only. Min. deposit: £10. Game: Vikings Runecraft, Spin Value: £0.50, Max Free Spins: 50. WR 60x free spin winnings amount (only Slots count) within 30 days. Max bet is 10% (min £0.10) of the free spin winnings amount or £5 (lowest amount applies). Free Spins must be used before deposited funds. Bonus Policy applies. Bonus Policy applies.
41
3.1 / 5
TOTAL SCORE

Deposit £10, Get 25 Slot Spins [Promo Code: Play25]

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First-time depositors only (UK exc NI 18+). Min Deposit: £10. Max Offer: 25 Free Spins on Sharknado. Free Spins Winnings will be capped at £2.50 and credited to your real money balance. Promo code: PLAY25. Valid until further notice. Wagering, Withdrawal restrictions & T&C apply.
42
3.3 / 5
TOTAL SCORE

77 No Deposit Free Spins + £200 Welcome Bonus

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New players only. 18+. Predefined bet amount of £0.25 per spin. Free Spins (FS) must be claimed within 48 hrs of receiving the email and expires after 14 days. FS wins are capped at £20 Bonus, excJP win. Deposit Bonus Offer: 100% up to £200 FreePlay (FP). FP wins are capped at the amount of FP received, excJP win. FS & FP wins are credited as bonus. Bonus wins are capped at £500. To withdraw bonus & related wins, wager 30 x (bonus amount) within 90 days. Wagering reqvary by game. This offer may not be combined with any other offer. Wagering, Withdrawal restrictions & T&C apply.

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