Are you looking for the best online slot machines? If so, read on to find out which are the top-rated slot titles you can play at online casinos today!
The best online casino slots come in many different shapes and sizes. Some feature a simple layout with a single payline, while others have six reels and thousands of ways to win. Most offer free spins and bonus rounds, as well as special features like wild symbols and multipliers.
Slots come in all shapes and sizes, but some are better than others. The great news is that we’ve tested hundreds upon hundreds of online slot games, enabling us to rank the very best.
From classics such as , NetEnt’s mystical to , which offers 7,776 ways to win, this list has something for everyone. We have not only ranked the best online slot machines but have also provided an in-depth review of each game along with screen shots.
You will also learn the RTP of each game, house edge, minimum bet, maximum bet, and where to find the best versions online. All the online slot games listed below have been independently tested and certified as fair by independent testing laboratories such as eCOGRA.
So, if you want to know what the top online slots look like, read below for our in-depth reviews. Our expert analysis should help you decide which are the best online slot games to play in 2023.
Top Online Casino Slots
- Ugga Bugga 98.6% RTP – 0.25 - 6.25
- Starburst 96.10% RTP – 0.10 - 100
- Mega Joker 99.00% RTP – 10.00 - 0.10
- Jackpot 6000 98.80% RTP – 10.00 - 0.10
- Good Girl Bad Girl 97.84% RTP – 1.00 - 100
- Guns N’ Roses 96.98% RTP – 0.20 - 100
- Hall of Gods 95.50% RTP – 0.50 - 100
- Twin Spin 96.60% RTP – 0.25 - 100
- Blood Suckers 98.00% RTP – 0.25 - 100
- Dead or Alive 96.80% RTP – 0.25 - 100
- 108 Heroes Multiplier Fortunes 95.84% RTP – 0.01 - 100
- 300 Shields Extreme 95.16% RTP – 0.01 - 100
- Funky Monkey 96.30% RTP – 0.25 - 100
- Lucky Diamonds 95.92% RTP – 0.25 - 100
- Escape from Alcatraz 96.50% RTP – 0.01 - 100
You won’t find these return-to-player rates everywhere. One of the best things about the online casino industry is that it is competitive. Therefore, to attract custom, operators often go head-to-head by offering higher RTP games than their rivals.
That means you can often find the best online casino slots RTP at one site and not another. Yet the operator with the highest RTP slots isn’t always doing so out of the goodness of its heart. Of course, there are risks attached to operating an online casino. But when you consider how many players visit sites daily, operators generally stand to make huge profits.
This means that that the best online slots RTP is not 90% or lower, as you often found in the past. Although low RTP games can still be found, the best online casino slots RTP is generally 93% or higher. As you can see from our list above, several games clear this bar, making them great long-term prospects.
Another thing to note is that, just because a game has a high RTP, it does not mean that you are guaranteed to win. RTP is worked out over millions of games. It is a percentage of how much money the game pays out compared to how much has been wagered on it. So if a game has an RTP of 98%, this means $98 has been paid out for every $100 wagered. Easy, right?
If you want to find the online casino with the highest RTP slots, here are some tips on where to look.
How to Find the Best RTP Slots Online
- Read Reviews – Before playing online slots for real money, it is always worth reading up on the game/casino in question. Independent reviews can give you valuable insights into the RTP of a game, as well as other important metrics, such as volatility. While seeing where a casino ranks when it comes to our list of the will also give you a good idea of its overall quality.
- Use Google – Want to know the RTP of a specific slot? Search the game name + “return-to-player” + “review site” online. Most of the time, this should bring up several websites that list the RTP of your chosen game at multiple online casinos.
- Look for Audits – Independent auditing companies such as eCOGRA, iTechLabs, and Technical Systems Testing (TST) are used by trustworthy . These organizations test RNG software to ensure that it is fair. So if you see the logo of any of these firms at an online casino, you know that the RNG software has been independently verified.
- Play at Reputable Casinos – Sticking with trusted operators is always advisable. Not only are they more likely to host the best RTP slots, but they will also be transparent about their RTP percentages. On top of this, reputable sites will offer a wide range of reliable payment methods and segment their offerings across distinct categories. This level of transparency and diversity should point you in the right direction.
- Gambling Community – Finally, you could ask around. The chances are that fellow players in forums such as WMG will be able to provide information on the best RTP slots to play online. At times like this, the gambling community can be incredibly helpful.
Now that you know how to find the best RTP slots, let’s look at the top ten online casino slots RTP in more detail.
#1 – Ugga Bugga
- Game: Ugga Bugga
- Software: Push Gaming
- RTP: 98.60%
- House Edge: 1.40%
- Reels: 6
- Paylines: 6
- Minimum Bet: £0.25
- Maximum Bet: £6.25
- Special Features: None
Ugga Bugga might not be the most exciting of online slots, but it has the best RTP of any game available at online casinos in the United Kingdom. Developed by Push Gaming, the game has been around since 2010 and has a classic feel.
It does not have any bonus rounds, scatter symbols, wild symbols, or free spins. What you see is a 6×6 reel set up with six ways to win. You get one coin per press of the button, and you can also choose between various coins.
Aside from the quirky Akenhead-style cavemen that serve as the game’s symbols, the other main attraction of Ugga Bugga is the wheel. Whenever you press the button, the wheels spin, and the symbols move randomly. When the wheels stop, they may enable a winning combination. If not, you can press the button again and ago.
Although the lack of extra features makes Ugga Bugga somewhat limited, it remains a hit with players due to its high return-to-player ratio and fun, engaging layout.
Where to Find Ugga Bugga
#2 – Starburst
- Game: Starburst
- Software: NetEnt
- RTP: 96.10%
- House Edge: 3.90%
- Reels: 5
- Paylines: 10
- Minimum Bet: £0.10
- Maximum Bet: £100
- Special Features: Wild symbols, Re-spins
Starburst is arguably the most popular of all , and it is easy to see why so many people enjoy playing it. With vibrant gemstones, a catchy soundtrack, and plenty of features, it stands the test of time almost a decade after its initial release.
One of the main reasons why it features so highly on our list of the best online slots RTP was designed for is its high RTP of 96.10%. Coupled with a low house edge of 3.90%, it doesn’t take much to win big on this game. What’s more, the maximum bet of £100 may encourage high rollers to play it at NetBet Casino.
When you launch the game, you will notice that it has five reels and 10 paylines. There are no bonus games, scatter symbols, or free spins. But there are wilds, which expand to cover the reel when landed. These turn the reel wild and lead to re-spins, giving you more opportunities to win.
Starburst is also one of the most mobile-friendly games around, meaning you can play it on the move. Paired with its high RTP and low house edge, these factors combine to explain why it regularly tops lists of the best online slots.
If its features and high RTP were not enough to convince you that Starburst is among the best online casino slots, maybe its payout proportion will. As previously mentioned, the RTP tells you how much a game pays out compared to how much has been wagered. In the case of Starburst, this equates to an eye-watering £96 for every £100 wagered.
By contrast, the house edge of Starburst is just 3.90%. This means that for this game, you are always getting a minimum of £3.90 for every £100 wagered. Considering that some games can yield a house edge of 10% or more, these proportions are quite remarkable.
Starburst is also one of the most , meaning you can play it on the go. It features the same layout, design, and features as the desktop version but has been optimised for mobile devices. This means that you can experience the thrill of one of the best online slots RTA at home and on the go!
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#3 – Mega Joker
- Game: Mega Joker
- Software: NetEnt
- RTP: 99.00%
- House Edge: 1.00%
- Reels: 3
- Paylines: 5
- Minimum Bet: £10
- Maximum Bet: £0.10
- Special Features: Progressive jackpots, Supermeter mode
Mega Joker is a classic NetEnt slot that was released back in 2013. Its retro design, featuring fruits and bars, harks back to the early days of slot gaming. It has just three reels and five paylines, with bets starting at £10 and going down to £0.10.
What makes Mega Joker one of the best paying online slots is its incredible RTP rate. When set to 100% RTP, this game has a house edge of just 1.00%, making it one of the lowest house edge slots around. In monetary terms, this means that for every £100 wagered, the player receives £99 in returns.
Part of the reason for this exceptionally high return-to-player rate is the fact that Mega Joker has a high-paying progressive jackpot. Known as the Mega Joker Jackpot, this prize drops regularly and can be life-changing.
The best way to compete for the jackpot is by activating the Supermetre Mode. Here, you hold all winning combinations and place a supermetre bet on top. You can bet up to 10 units of your base game bet, creating bets of up to £100. If you land two jumpers on the bottom reel, you’ll play a jackpot game where you must match three cards to win the prize.
There are no free spins or bonus games on Mega Joker, and it only has one symbol wild. However, the retro style, combined with the progressive jackpot, makes it one of the best online casino slots. It can be found at several top sites, including the excellent Mr Green Casino.
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#4 – Jackpot 6000
- Game: Jackpot 6000
- Software: NetEnt
- RTP: 98.80%
- House Edge: 1.20%
- Reels: 5
- Paylines: 5
- Minimum Bet: £1
- Maximum Bet: £100
- Special Features: Gamble feature, bonus wheel
Jackpot 6000 is similar to Mega Joker in many ways. Likewise, developed by NetEnt, it has a retro feel, five reels and five paylines. Bets range from £1 to £100, and there is a bonus wheel feature activated whenever three bonus symbols land on the 2nd, 3rd, and 4th reels.
Top Free Casino Games to Play Online for FunThe gamble feature allows you to either double or quadruple your win by correctly guessing the suit or colour of a card. And like Mega Joker, Jackpot 6000 offers a progressive jackpot. The difference is that this game does not have super meter mode. Instead, if you play five coins and all three rows of a row of bells, you’ll win the jackpot outright.
Once again, it is the RTP and house edge that sets Jackpot 6000 apart. When set to 100% by the player, the RTP of this game is 98.80%. This equates to a staggeringly low house edge of just 1.20%, making it one of the best rtp slots UK players can play online.
While Jackpot 6000 does not feature free spins or bonus games, it is still considered one of the best online slots. You could even argue that the optional gamble feature makes up for their absence. And considering that many new slots have multiple bonus games and free spins rounds, perhaps this is not such a bad thing.
What’s more, Jackpot 6000 has a classic feel that many modern games lack. It can be found at many of our , including the excellent Grand Ivy Casino.
Where to Play Jackpot 6000
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#5 – Good Girl Bad Girl
- Game: Good Girl Bad Girl
- Software: Betsoft
- RTP: 97.84%
- House Edge: 2.16%
- Reels: 5
- Paylines: 15
- Minimum Bet: $0.02
- Maximum Bet: $150
- Special Features: Good and Bad Side Bets, Jackpot Game, Five Reel Slot Game
Good Girl Bad Girl is a five-reel slot from Betsoft that gives you the chance to choose between the angels and the devil. Select the good side, and bet limits range from $0.02 per spin up to $150. Opt for the bad side, and the minimum bet is halved, while the maximum stays the same.
In terms of features, both sides of Good Girl Bad Girl are largely identical. The good side features a progressively jackpot, while the bad side has a gamble function. Either way, there is a scatter symbol, a golden hourglass that provides between 5 and 200x your bet when 2-5 land anywhere on the reels. There is also a bespoke symbol for each side. Panda and Pearl, the good guys, provide between 5 and 750x your stake, while the devil and Lucifer’s sister, Marie, delivers between 5 and 4000x your bet when 2-5 symbols land.
There is also a PEARS symbol, which delivers wilds or blanks when you land Pearls on both the good and bad segments of the jackpot wheel. Four pearls result in five random wilds; five pearls means 10 random wilds.
But the best feature of Good Girl Bad Girl is its RTP rate. Across 100 spins, this game delivers an RTP of 97.84%. This equates to a stonkingly low house edge of 2.16%, making it one of the best paying online slots in the world.
Good Girls Bad Girl also features a progressive jackpot that seed at 3,000 credits and climbs rapidly. When it is won, it resets to 3% of the slot’s total bets. Considering that this game is linked to several other Betsoft slots, it can quickly grow to life-changing levels.
Good Girls Bad Girl has everything you could want from an online slot. With dual gameplay modes, free spins, and a progressive jackpot, it is little wonder that this game enjoys enduring popularity at Betway Casino.
Where to Play Good Girls Bad Girls
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#6 – Triple Seven
- Game: Triple Sevens
- Software: NetEnt
- RTP: 99.15%
- House Edge: 0.85%
- Reels: 3
- Paylines: 5
- Minimum Bet: £1.50
- Maximum Bet: £150
- Special Features: High symbols
Triple Sevens is another simple yet effective slot from NetEnt. It has three reels and five paylines. Bets start at £1.50 and go up to a massive £150. There are no bonus games, free spins, or wild symbols. In fact, the only symbols are bars and sevens. The bars come in different colours, and the greens are low-paying symbols. Yellow, purple, and blue bars are high-paying symbols. Red, magenta, and orange sevens are the highest-value symbols in the game.
So unless you luck into a jackpot, big wins are relatively rare. When they do occur, however, it justifies the high stake players embrace. Considering that this game has an RTP of 99.15%, it is little wonder that it remains a hit with players. When set to 100% RTP, the house edge of Triple Sevens is just 0.85%.
Poker Bonuses (2023) - Top Online Bonuses + How-toOver time, this means that you will get back £99.15 for every £100 wagered on Triple Sevens. If you prefer simple slots with few frills and a high RTP, Triple Sevens could be right up your alley. You can play this game and many others like it at Cashmio Casino.
Where to Play Triple Seven
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#7 – Jack Hammer II
- Game: Jack Hammer II
- Software: NetEnt
- RTP: 97.04%
- House Edge: 2.96%
- Reels: 5
-
- Paylines: 99
- Minimum Bet: £0.50
- Maximum Bet: £250
- Special Features: Free Spins, Sticky Wins, Wilds
NetEnt’s comics book-styled follow-up to the original Jack Hammer is a visually stunning game with plenty of features. Set over five reels and 99 paylines, bets start at just 50p per spin or up to £250.
Like the original game, this instalment is based on the comic book adventures of a private detective named Jack Hammer. The graphics are fantastic, and there are plenty of bonus features to keep you entertained.
For example, when you land five free spin symbols, you trigger the Free Spin Round. You receive 14 free spins, but during the round, sticking wins come into play. Whenever a symbol is part of a winning combination, it becomes sticky and remains in place for the duration of the free spins.
Wild symbols also appear on reels 2, 3 and 4 during the free spin game. They replace all symbols aside from free spin and wild symbols. Furthermore, it is possible to retrigger the free spin game by landing three scatters during the sticking wins feature.
All these features make Jack Hammer II an entertaining game. However, it is the game’s RTP that really sets it apart. When set to 100% RTP, this slot has a house edge of just 2.96%, making it one of the best online slots RTP.
Pair this high RTP with the sticky wins feature, and it is little wonder that Jack Hammer II is so popular. You can activate these features and benefit from a high RTP at Casumo Casino.
Where to Play Jack Hammer II
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#8 – Hall of Gods
- Game: Hall of Gods
- Software: NetEnt
- RTP: 95.55%
- House Edge: 4.45%
- Reels: 5
-
- Paylines: 20
- Minimum Bet: £0.50
- Maximum Bet: £50
- Special Features: Three Progressive Jackpots, Wild Symbols, Free Spins
Hall of Gods is a five-reel, 20-payline progressive jackpot slot from NetEnt. It is based on Norse mythology and features Thor’s hammer, Odin’s ravens, and the midgard serpent amongst its symbols.
There are three progressive jackppts—the Mega, Major, and Minor jackpots. To win the Mega jackpot, which seed at £200,000, you need to fill five reels with scrambled eggs during the jackpot game. The Major jackpot requires four reels to be filled with scrambled eggs, and the Minor jackpot is awarded when three reels are filled with eggs.
Even if you do not win the progressive jackpots, Hall of Gods offers plenty of entertainment. The free spins bonus game can be re-triggered, and expanding wild symbols can cover all positions on their reels. There are also scattered bonuses symbols that award up to 20 free spins when five land anywhere on the screen.
Free spins also feature multipliers worth 3x, 6x, and occasionally up to 15x when more than one free spin symbol is part of the combination that triggers the feature. Plus there is a gamble feature that allows you to treble or quadruple your win by correctly guess the suit or colour of a card.
Overall, Hall of Gods is a highly enjoyable game. It offers three massive jackpots and plenty of bonus features. Better yet, Hall of Gods has an RTP of 95.55%, which equates to a house edge of just 4.45%.
Considering that this rate is across 100 spins, it means that for every £100 wagered, you receive £95.55 in returns. Few slots offer such a high RTP alongside massive progressive jackpots. Unsurprisingly, this game can be found at many top sites, including the Rainbow Riches Casino.
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INTERCASINO REVIEW UK - GAMES & SLOTS RATED AND PROVISED#9 – Dead or Alive
- Game: Dead or Alive
- Software: NetEnt
- RTP: 96.80%
- House Edge: 3.20%
- Reels: 5
-
- Paylines: 9
- Minimum Bet: £0.09
- Maximum Bet: £13.50
- Special Features: Free Spins, Sticky Wilds, Low Variance
Dead or Alive is a classic NetEnt slot that has proven enduringly popular since its release in 2009. Set against a backdrop of a deserted Western street, this game features wanted dead posters, cowboy boots, cattle skulls, and four characters—two males and two females.
The female outlaws provide up to 1200x your stake for a line of five, while the male thugs deliver up to 600x. The highest-paying symbol is a ‘wanted dead or alive’ sign featuring the highest-paying symbol, providing up to 2,500x for a line of five.
However, the most valuable symbol in this game is the free spins symbol. Land 3 or more of these scatters anywhere on the reels, and you’ll receive 12 free spins. But unlike most slot machine free spins games, the sticks in Dead or Alive.
This means that whenever a stuck wild is part of a winning combination, it remains in place for the duration of the free spins. As such, it is possible to amass mega wins from a single spin. In fact, the advertised max win of 3000x your stake is only possible during the free spins feature.
But to unlock this element of the game, you need to land three scatters. Most slots require four or five scatters to trigger their free spin rounds. By reducing the cost of activating free spins, NetEnt have offset some of the huge wins you can achieve during the feature.
In fact, Dead or Alive has a low variance, making it ideal for beginners. It also has a high RTP of 96.80%. When set to 100% RTP, the house edge of Dead or Alive is just 3.20%, making it one of the best rtp slots available today.
These attributes have helped Dead or Alive become a cult classic. It is available at many leading sites, including the impressive Mr Green Casino.
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#10 – Hell Boy
- Game: Hell Boy
- Software: NextGen
- RTP: 95.46%
- House Edge: 4.54%
- Reels: 5
-
- Paylines: 20
- Minimum Bet: £0.20
- Maximum Bet: £250
- Special Features: Expanding Wilds, Re-Spins, Five Progressive Jackpots
Based on the movie of the same name, nextGen’s Hell Boy features the eponymous hero, leaping around the reels accompanied by ABC’s of Heaven. There are also five high-paying symbols, including Hell Boy himself, a sea monster, and the movie’s two lead actresses.
Low-paying symbols include 10, J, Q, K and A, accompanied by fire and smoke animations whenever they form part of a winning combination. There is also a scattering symbol that awards up to 500x your total bet when five land anywhere on the screen and a wild icon that expands to cover all thirteen positions in a reel.
Expanding wilds trigger a re-spin, giving you another chance to land additional wilds on other reels. If you are lucky enough to get all five reels wild, you’ll trigger the Supermode feature, which rewards you with 15 free spins.
Aside from these features, Hell Boy offers five progressive jackpots—the Rapid, Regular, Rapidmax, Super, and Mega progressive prizes. To win any of these prizes, you must enter the Wheel of Fortune bonus game by landing three jackpot symbols on the second, third, and fourth reels. Once there, Hell Boy spins a wheel that seeds at modest amounts but can climb rapidly.
Across 100 spins, the house edge of this game is just 4.54%, meaning you receive 95.46 in returns for every £100 wagered on Hell Boy. Throw in expanding wilds, free spins, and five progressive jackpots into the mix, and it is little wonder that this game is so popular.
Hell Boy can be found at many of the , including the impressive Casimba Casino.
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#11 – Hercules Son of Zeus
- Game: Hercules Son of Zeus
- Software: IGT
- RTP: 95.44%
- House Edge: 4.56%
- Reels: 5
-
- Paylines: 100
- Minimum Bet: £0.50
- Maximum Bet: £500
- Special Features: Wild Ancients, Free Spins, Wild Huskies, Wild Hercules Reel
IGT’s Hercules Son of Zeus is
