Best RTP Slots: 2023


Discover the top RTP slots in the UK and where to play them. This page is regularly updated and below are the slots with the highest RTP rates as of December 2023.

Furthermore, we look at the highest payout slots, how RTP is calculated and how other factors affect it. This includes theoretical RTP, variance/volatility, varying RTP rates, how they affect bonuses and why RTP is so much higher online. Enjoy!

Top 10 Best RTP Slots: Our Ranking

Want play the best RTP online slots? Here’s out list of the 10 highest RTP slots with a summary of what to expect from each of the slot games.

  1. Ugga Bugga – 99.07%
  2. Book of 99 – 99%
  3. 1429 Uncharted Seas – 98.6%
  4. Marching Legions – 98.12%
  5. Madame Mystique Megaways – 98.03%
  6. Blood Suckers – 98%
  7. Money Cart 2 – 98%
  8. Jokerizer – 98%
  9. Starmania – 97.87%
  10. White Rabbit Megaways – 97.77%

1. Ugga Bugga (Playtech) – 99.07% RTP


Created by Playtech in 2006, Ugga Bugga is a 3 reel slot with 10 individual paylines. Set in the African jungle, the aim is to form wins on as many paylines as possible (known as the Multi-Spin feature).

With 1,000 x bet max wins up for grabs, Ugga Bugga comes with a whopping 99.07% RTP rate. As a result, it’s earned cult status. You can find this game alongside other Playtech slots at:

Jackpot Casino
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T&Cs Apply

Terms and Conditions Apply. New players only. 18+. Minimum deposit and play £15. No wagering requirements. Max cashout £100. Gambling can be addictive, please play responsibly. #ad

2. Book of 99 (Relax Gaming) – 99% RTP


Powered by Relax Gaming, Book of 99 comes with 5 reels and 10 paylines. With an ancient Greek theme, it’s all about the Free Spins feature which begins with 10 free spins. With a special expanding symbol in play, expanding symbols can appear in non-adjacent positions to give you wins.

With unlimited retriggers and 5,000 x stake wins, you can also collect wilds in the base game to trigger the free spins. More importantly, the Book of 99 RTP if 99%. This is the highest return rate currently available. You can play Book of 99 at this top-rated UK casino:

LeoVegas Casino
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18+, T&Cs apply. New reg only. 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. 25 wager-free spins x10p to added to Big Bass Splash with each qualifying deposit, 3 day expiry. #ad

3. 1429 Uncharted Seas (Thunderkick): 98.6% RTP


1429 Uncharted Seas from Thunderkick is a 5 reel, 25 payline slot game which can be played from 10p per pin on all devices. With a pirate theme, this beautifully designed slot takes you back to the early years of seafaring exploration. The graphics are unique and look like an old treasure map.

It comes with expanding wilds in the base game. There’s also a Free Spins feature where you can start with up to 50 free spins and retrigger to play with up to 100 in total. With expanding wilds during the free spins, this low variance game is popular as the RTP stands at 98.6%. It also offers wins of 670 x stake on each spin or free spin. By the way, you can play 1429 Uncharted Seas here:

Casushi Casino
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T&Cs Apply

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 £10. 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

4. Marching Legions (Relax Gaming): 98.12% RTP


Powered by Relax Gaming, Marching Legions is a 5 reel slot with 243 ways to win. Based on the Roman legion, this graphically superb title comes with stacks of legionnaire symbols that give you re-spins. The re-spins continue until the legionnaire stacks shift off the reels. To help you, there’s a Nudge element where partial stacks on 2 or more reels will give you Marching Stacks.

In the Free Spins feature, you begin at ‘Wave 1’. Collect horns to move to the next ‘wave’. When you do this, the Marching Stacks is 2 reels wide. With 5 levels of waves, you could play with 5 Marching Stacks at once. It offers 7,458 x stake max wins and a 98.12% RTP rate. Check it out at:

Duelz Casino
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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! #ad

5. Madame Mystique Megaways (Pragmatic Play): 98.03% RTP


Madame Mystique Megaways is by Pragmatic Play and comes with 6 reels and up to 200,704 ways to win. Based on a fortune teller, it offers tumbles but the main attraction is the Free Spins feature. Here, you spin the Wheel of Fortune which can reward you with up to 12 free spins and a win multiplier up to 25x. More free spins can also be won.

With 5,000 x bet max wins, the Madame Mystique Megaways RTP is 98% which is very high. The gameplay is rather simple but the high RTP rate is definitely appealing. It can be played at this UKGC licensed casino:

  • 50% Bonus (£150) + 150 Bonus Spins
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T&Cs Apply

18+. New players only. 50% bonus on first deposit up to £150 & 150 Bonus Spins (50 Bonus spins per day for 3 days) on Book of Dead slot only. Min first deposit of £20. Max bonus £150. 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. Further Terms Apply #ad

6. Blood Suckers (NetEnt): 98% RTP


Powered by NetEnt, Blood Suckers is a 5 reel, 25 payline slot title which can played on all devices from as little as 25p a spin. Released in 2009, this vampire themed slot has an eerie soundtrack and has classic graphics. It offers a hit frequency of 44.9%.

It comes with a Vampire Slaying Bonus feature where you pick from coffins to win cash prizes. It focuses on the Free Spins feature where you begin with 10 free spins and a 3x multiplier. You can also win 10 more free spins. The max win is 1,014.6 x your total stake on ever free spin. The RTP is 98%. It’s available to play here:

Casumo Casino
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18+. New customers. Opt-in required. 20 Bonus Spins on “Sahara Riches Cash Collect” at 10p per spin and 100% Deposit Bonus up to £100 on first deposit (payment method and play restrictions apply). Min. deposit £10. 30x wagering for Bonus Spins and Deposit Bonus (game weighting applies). Max. £5/spin or £0.50/line. 30 days expiry. Please gamble responsibly • #ad

7. Money Cart 2 (Relax Gaming): 98% RTP


Powered by Relax Gaming, Money Cart 2 is a bonus feature version of Money Train 2. Played on a 5×5 grid, there is no base game as it focuses on the Re-Spin feature (triggered every 10 spins on average).

With various special symbols in the Re-Spin feature, you can expand the grid to 6×5 in size. With 5,000 x bet max wins, Money Cart 2 boasts an impressive 98% RTP rate as standard.

Playzee Casino
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18+ New players only. Min Dep £20. Max Bonus Bet £5. Offer: 100% of 1st deposit up to £300 + 150 Zee Spins on Starburst (first 60 credited on 1st deposit; rest credited at 07:00GMT at 10/day) + 500 Zee Points. Spins expire after 23:59GMT on day they’re credited. Winnings from each set of spins capped at £50 & credited as bonus. Bonus funds expire after 30 days, are separate to Cash funds, & subject to 35x wagering of bonus + deposit amounts. Affordability checks apply Full Terms Apply #ad

8. Jokerizer (Yggdrasil Gaming): 98% RTP


Jokerizer is by Yggdrasil Gaming and has 5 reels and 10 paylines. Playable from just 10p per spin on all devices, it’s based on classic fruit machines. There’s an enhanced portrait mode for play on mobile devices.

There’s a Mystery Win when you can win up to 600 x your total stake if you land 3 or more Joker symbols. You can opt for the Jokerizer Mode for extra prizes too. The RTP is 98% and can play be played at this top UK site:

NetBet Casino
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T&Cs Apply

18+. New UK certified players | Valid mobile number required | No minimum deposit | 20 Book of Dead spins allocated | 40 times wagering on winnings | Ends 30.06.24 | T&Cs apply #ad

9. Starmania (NextGen Gaming): 97.87% RTP


Powered by NextGen Gaming, Starmania was released in 2015 and comes with 5 reels and 10 paylines. A win both ways slot game, this space themed adventure can be played, on all devices of course, from just 10p per spin.

It comes with a Free Games feature where up to 20 free spins can be won. More importantly 30 extra stacked wilds will be added across the 3 central reels. This makes it easier to win the max 1,000 x stake payout per spin. More impressive is the RTP which stands at 97.87%. It can be found at NetBet Casino:

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10. White Rabbit Megaways (Big Time Gaming): 97.77% RTP


White Rabbit Megaways has 5 reels and offers up to 248,832 ways to win. Powered by Big Time Gaming, this Alice in Wonderland inspired slot comes with a Caterpillar Wilds feature which can add bonus wilds with multipliers.

In the Down the Rabbit Hole Free Spins feature, Cupcake symbols will expand the reels which can reach 12 high for 248,832 Megaways. With an RTP of 97.77%, it offers 17,420 x stake wins per spin. You can play this game, along with lots of other Megaways slots, at:

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RTP and Payout: What is the connection?

You will see the term ‘best payout slots’ mentioned and this can be confusing. It’s all down to how you define payout. You can define payout as:

  1. The return to player rate (RTP)
  2. How much a slot game pays back per spin
  3. How often you win (known as hit frequency rate)

In this section we take a look at the online slots that payout the most per spin, or the best paying slot games. This can also be referred to as max win per spin, maximum exposure or the highest payout rate.

Contrary to the best RTP rates, big payout slots don’t necessarily offer a high RTP. It also works the other way in that a top RTP rate can mean small max wins per spin.

Our focus here is the maximum win per spin in terms of stake or bet multiplier. This may mean these particular high payout slot games are often excluded from wagering requirements for a casino bonus including no wager free spins offers.

Best Payout Slots

Here are 5 best paying slots, jackpot ones excluded, that offer the best payouts per spin or the slots that payout the most on every spin. Each of them can pay over 100,000 x bet on a single spin:

  • Tombstone RIP (Nolimit City): Created by Nolimit City, Tombstone RIP is the most brutal slot ever made (to date). With 5 reels and 108 paylines initially, this Wild West massacre features amputations, hangings and murder. It comes with xNudge Wilds, Reel Split Wilds, xSplit Wilds, increases ways to win and 2 free spins features. The Boothill free spins has cowboy multipliers up to 999x but there’s a 9.08% hit frequency rate meaning wins will be few and far between. That said, these notorious outlaws can deliver payouts of up to 300,000 x bet wins per spin. The RTP is 96.08% with the volatility classed as insane.
  • Starburst XXXtreme (NetEnt): Powered by NetEnt, Starburst XXXtreme is their sequel to the most popular slot game of all time (Starburst). With 5 reels, 9 paylines and an outer space theme, it is playable from 10p a spin and has a 96.26% RTP rate. Expect a win ever 5 spins. Available on all devices, it comes with Starburst Wilds which lock in place with re-spins to follow. These wilds come with multipliers up to 150x which can combine up to 450x (for 3 of them). This can lead to 200,000 x bet max wins per spin.
  • Peking Luck (Pragmatic Play): Powered by Pragmatic Play, the 5 reel, 25 payline Peking Luck has a Chinese luck theme. It has a high 96.5% RTP rate. Very volatile, it comes with a high value wild symbol which pays 400 x stake for 5 in combination. If a wild is part of a win, your payout is subject to a 2x multiplier. Like a lot of other high payout slots, it’s all about the Free Spins feature. You pick from fans to win up to 38 free spins. Then pick from 6 dragons to reveal a multiplier up to 18x. Unlimited extra free spins can be won but the potential 18x multiplier can give you wins of 180,000 x bet per free spin. To win this, you need a screen full of wilds with the 18x multiplier.
  • Money Train 4 (Relax Gaming): The last in the Money Train series by Relax Gaming, Money Train 4 is the the bandits’ last ride of the rails. Played on a 6×6 grid with Scatter Pays, it benefits from random respins with multipliers in the base game. It’s playable from just 10p per spin across all devices. The RTP is up to 96.1%. The focus is the Money Cart Bonus feature which comes with a new Arms Dealer bandit, other new special symbols and even bigger payouts. Money Train 4 can deliver 150,000 x bet max wins
  • San Quentin (Nolimit City): Powered by Nolimit City and with 5 reels and 243 ways to win, San Quentin is a prison themed slot. Using their xWays mechanic, the RTP is 96.03%. There are Enhancer Cells that can reveal Razor Split symbols for up over 13 million ways to win. xWays symbols display 4-high stacked symbols. There’s also a Split Wild feature which gives you up to 46,656 ways to win. The main attraction is the Lockdown Spins feature which comes with Jumping Wilds. Moving about on each free spin, they can combine with Razor Split enhancers to give you 512x multipliers. This can lead to 150,000 x bet wins on each free spin.

Finding RTP Rates

As per requirements set out by the UK Gambling Commission, gaming machines (whether a fruit machine, slot machine or FOBT) are required to clearly display the percentage return-to-play figure (RTP %) or the odds of winning a prize.

The RTP is normally found in the slot’s paytable. Most slots will have an ‘i’ or ‘Paytable’ button or icon where you can find the payouts for individual symbols, information about the bonus features, how winning combinations are created and what the RTP % is.

Other ways include checking the detailed reviews here or by calculating it yourself. Here are 3 ways to find a slot’s RTP rate:

  1. best-rtp-slots-how-to-step-1 1
    Open the slot’s Paytable

    Click/press the ‘i’, ‘?’, menu or Paytable button to open the Paytable. Scroll through the Paytable or Help section where the game’s RTP rate will be listed.

  2. best-rtp-slots-how-to-step-2 2
    Check our reviews

    All our reviews include RTP rates as well as max win potential, volatility, hit frequency rate, reels, paylines and bonus feature details.

  3. best-rtp-slots-how-to-step-3 3
    Calculate RTP yourself

    The total amount won divided by the total amount bet is your actual RTP

How is RTP in slots calculated?

A slot RTP is the Return to Player rate you will get when playing that slot game. It’s also known as the online slots payout percentage. If an online slot has an RTP of 95% for example, you will win back 95% of your stakes on average (so £95 for a £100 wager).

If the RTP is 50% and wagered £100, you’d win back £50 on average. The bigger the RTP, the more you’ll win back. In theory, the best paying online slots are the ones with the highest RTP.

The difference between 100% and the RTP is the house edge or profit an online casino will make. If a slot has a 95% RTP, the online casino will benefit from a 5% house edge or margin.

The higher the RTP, the less the online casino wins on average per spin. This is why players will prefer to play the top RTP slots as their chances of winning are higher.

To calculate a slots’ Return to Player rate, you need to get the amount returned divided by the total amount staked or wagered. For example:

Total amount returned = £97
Total amount stake = £100
RTP = £97/£100 = 97%

What is Theoretical RTP?

The RTP does not mean you will get £95 from wagering £100 for a 95% RTP slot game. The theoretical RTP is the Return to Player rate that a particular online slot pays out on average across lots of spins. In summary, theoretical RTP is the guaranteed RTP across millions or billions of spins.

If you take Quickspin for example, they calculate their RTP rates across a billion spins. If you wager £100 and lose every single time, your RTP will be 0%. For a winning player, the RTP could be 200% or even 5000%.

The RTP set by slot providers is the average of all spins in a cycle of a set number of spins. On average (this being the key word), the RTP for a particular online slot will be what they showcase in the paytable. To summarise:

RTP is the return a slot will pay out over lots of spins – i.e. 95%
Your RTP rate is based on randomness and may be 0% or over 100%
RTP is calculated over millions or billions of spins

RTP and Variance: why it's important to understand the difference

Your RTP % is connected to a slot’s variance or volatility. If all payouts (RTP) from a slot are distributed evenly in terms of small and medium size wins, the slot will be a low variance slot. If a slot pays the majority of the RTP in bigger wins, the slot is a high variance slot.

Hit frequency also plays a part. Some slots will have a hit frequency of 10% meaning 1 in 10 spins will result in a winning combination. A slot game with a 40% hit rate means 4 in 10 spins will give you a win. The higher the hit frequency, the more likely you are to win.

Whilst you may be tempted to play slots with high hit frequency, 1 win from a slot can pay a lot more than 10 wins from another slot game.

  • Low variance slots: Many high RTP slots are actually low variance. This is because the slot provider will want to limit the risk and return paid out to players. It doesn’t mean these slots can provide big wins though.
  • High variance slots: Most of the wins will come in the bonus features which may require 100s or 1,000s of spins to trigger. This is because the wins in these features can be very high – i.e. 50,000 x your stake per spin.

Playing high variance slots is risky as your chances of winning are much lower on average. This is because big wins will be few and far between with most wins likely to be small in size. More often than not, a high variance slot will eat up your bankroll and give you very little, if anything, in return.

RTP Rates in Jackpot Slots

When you play a progressive jackpot slot, a portion of the RTP is reserved for the jackpots. This is why the RTP rate for a jackpot slot is typically lower than for an online slot with no jackpots.

In order to offer a progressive jackpot, part of what is wagered on the jackpot slot going into the progressive jackpot pool or fund. That is then won by the lucky player when the jackpot is hit. If you take NetEnt’s Mega Fortune jackpot slot, it has an RTP of 96.5% overall. The RTP is distributed as follows:

Base game 62.8%
Free Spins 16.8%
Bonus Game 9.3%
Jackpots 7.6%

This means that 7.6% of what is wagered on the Mega Fortune slot goes towards the progressive jackpots you can win. Without the progressive jackpot element, the RTP is 89%. If you compare this to another of NetEnt’s slots, Starburst, which has an RTP of 96.09%, there is a difference of 7.09% which is quite significant considering the chances of winning the progressive jackpots are pretty remote.

Another example would be IGT’s Cleopatra slot. There’s the standard version and the jackpot version, MegaJackpots Cleopatra. The slots offer exactly the same bonus features but just the jackpots separating them. Here’s how the RTP varies from one version to another:

Cleopatra 95.02% RTP
MegaJackpots Cleopatra 88.98% RTP (without progressive jackpot)
Difference 6.04% RTP

If you look at the most popular jackpot slots, here’s their RTP with and without the progressive jackpot element:

Slot RTP with Jackpot RTP without Jackpot
Mega Fortune (NetEnt) 96.6% RTP 89% RTP
Hall of Gods (NetEnt) 95.7% RTP 88.7% RTP
Mega Moolah (Microgaming) 93.42% RTP 88.12% RTP
Jackpot Giant (Playtech) 94.22% RTP 91.24% RTP
Age of the Gods (Playtech) 95.02% RTP 94.03% RTP

Varying RTP Rates


Whilst most slot providers will advertise the highest RTP % possible, some providers offer different options to their clients, the online casinos. For example, Play ‘n GO have 5 different RTP options for all their slots. If you were to take the popular Legacy of Dead slot, the RTP ranges from 96.58% at the top end of the scale right down to 84.55%.

Check at the online casino you play with prior to playing a particular slot. Most established and new online casinos will offer the highest RTP option on the whole which is beneficial.

If you are playing at a casino regulated by the Malta Gaming Authority, the RTP for a particular slot game may be lower than in the UK. The MGA requires licensees to abide by a minimum average return to player rate of 85% or higher.

For more information on varying RTP rates, check out our dedicated blog post which highlights the casino which offers the best RTP rates for their slots.

High RTP Slots and Casino Bonuses

Most slot sites offer bonuses to new and existing players. This is an incentive to get players to sign up and deposit or to keep on playing. Whilst good UK casino bonuses are welcome, they come with wagering requirements.

If you were to get a 100% bonus up to £100 for example with 40 x wagering requirements, you would need to wager the bonus (£100) 40 times = £4,000 in wagering.

Playing high RTP slots in theory makes it easier for players to clear wagering requirements allowing them to cashout the bonus. As a result, online casinos don’t allow wagering from certain games for their slots welcome bonus. These tend to be slots with the top RTP rates. Please check the casino bonus’ terms and conditions prior to playing a high RTP slot for a bonus offer. Note that you won’t come across really high RTP slots with new no deposit bonuses.

Land Based Slots

If you’re wondering whether playing slots at a land based casino is more lucrative, think again. In Nevada (home to Las Vegas casinos for example) the minimum RTP must be at least 75% whilst it’s at least 83% in New Jersey. Online, the average RTP is around the 95.5% mark.

If you take Novomatic and WMS for example, many of their slot games originate from the land based environment. This is why their RTP rates tend to be around the 95% mark. Newer releases though are 96% or over on average.


This guide to high RTP slots is updated regularly and as soon as a slot game with a high return rate is released basically.

With over 5,000 slots reviewed, the RTP rate is something we report on in all of our detailed reviews as well as theme/design, slot details, bonus features and expert analysis. You’ll also find free demos to try the game before playing for real money as well as the top slot sites you can play them at.

Online since 2011, our team has over 20 years of combined experience. As slots players ourselves, here are some facts as to why you’re in good hands:

✅ Founded in 2011
✅ Independent site
✅ First UK portal to introduce slot demo verification
✅ 5,000+ slot game reviews
✅ 200+ British-licensed casino sites reviewed
✅ Exclusive welcome bonuses/offers
✅ Blog: regular news articles + interviews

To summarise, here are a list of pros and cons when it comes to playing the highest RTP slots:

  • Better long-term chances of winning
  • Lower house edge/margin
  • Widely available at UK casinos
  • More frequent wins
  • Lower or no contributions to bonus wagering requirements
  • Smaller max wins available on average

RTP Slots FAQs

What are the best RTP slots?

Any slot with an RTP % of 97% or higher is considered very high. Check out our list of the highest RTP slots with the likes of Book of 99 (99%) and 1429 Uncharted Seas (98.6%). In theory, you will win back more per wager as the house edge is smaller for the online casino.

What is RTP on slots?

RTP (Return to Player) is the terms used to describe the percentage/rate of money won versus money wagered on a slot game. If a slot advertises a 95% RTP rate, you will theoretically win £95 back for every £100 you wager, on average. Playing high RTP slots will give you a bigger return in theory.

How is RTP calculated?

The Return to Player rate is calculated by the total amount return to players divided by the total amount wagered by players. The RTP is calculated over 100 of thousands, millions or billions of spins on average – not 1 particular session.

Where can I find RTP for slots?

If playing slots in the UK, the UK Gambling Commission stipulates the Return to Player % must be clearly displayed on all slots offered. The RTP % can be found in Paytables or help sections of the slot game. Expect a RTP of 95% or higher on average.

What is the average RTP of slots?

The average RTP in online slots is around the 96% mark. With increased regulation and more restrictions for online casinos, average RTP rates are decreasing all the time. Nearly all slot providers offer alternative/lower RTP versions of their slot games which may be used at your chosen casino.

Does RTP matter in slots?

Yes, the higher the RTP rate, the more you’ll win back theoretically. Taken across an average of billions of spins, a 98% RTP slot will pay back £98 if you stake/wager £100 on average whilst a 95% RTP slot will pay back £95/£100.

Does bet size affect RTP?

In theory, no! The RTP is calculated over billions of spins so it’s completely random whether you win or lose. Playing with a low or high bet size doesn’t affect the outcome of the online slot game you’re playing.

What is the highest payout rate online slots?

The highest payout rate for online slot games is 99%, at the time of writing. This RTP rate is for the Book of 99 slot by Relax Gaming. Anything above 96.5% is considered high in reality.

Chris Taylor
Review by
Last updated: November 23, 2023

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