99 RTP Slots Featured

Best 99% RTP Slots

While RTP 99% games aren’t as common as lower RTP releases, there are still some great options to try out. If you’re looking for somewhere to begin your epic online slot journey, you won’t go wrong with the games we’ve highlighted below.

Slot Name



Book of 99

Relax Gaming


Mega Joker



Ugga Bugga



Ooh Aah Dracula



Fruit Beats Xtream



Nemo's Voyage



Bruce Lee: Fire of the Dragon



Ocean Princess



Monopoly Big Event



1. Book of 99 – 99.00% RTP

Book of 99 slot screenshot of the reels

Relax Gaming’s Book of 99 is a modern online slot release with plenty of punch. It’s a mythology-themed game that centres around a core free spins bonus, which can deliver huge payouts worth up to 5,000x your stake.

The game is played across 5 reels, 3 rows and 10 paylines, with stakes ranging between £0.10 – £100 per spin. So it’s perfect for both low-stakes and high-stakes play. The intriguing thing is, that you can trigger the free spins bonus in one of two ways.

First, you can naturally trigger the feature by landing 3 or more Book symbols on any spin. However, what sets this apart from similar releases is that it also has a collection trigger – once you’ve collected 99 Book symbols, you’ll automatically activate the bonus. It’s a great high RTP game we’re sure you’ll love.

2. Mega Joker – 99.00% RTP

Mega Joker slot from NetEnt

Mega Joker, from NetEnt, is one of the all-time classic 99% RTP slots. It features straightforward 3-reel gameplay that awards wins across 5 paylines, with bets available from £0.10 – £10 per spin.

Just because it’s an older release though, it doesn’t mean there isn’t plenty to get excited about. You can double your wins in a gamble round, the Supermeter Mode can award even larger payouts and a progressive jackpot is up for grabs when you play at the highest bet level.

3. Ugga Bugga – 99.07% RTP

Ugga Bugga slot review

With a 99.07% RTP rating, Playtech’s Ugga Bugga is among the highest RTP slots. While it doesn’t include traditional bonus features such as free spins or multipliers, it does have a unique gameplay mechanism that introduces held reels. Each spin actually consists of two steps.

During the first part, just one of the rows will spin. Of the three symbols that land, you’ll then be able to hold one of them to potentially increase your chances of winning – you can also choose to let the reel spin if you prefer. The game also features wild symbols that play a huge part in the game’s 1,000x maximum win.

4. Ooh Aah Dracula – 99% RTP

Ooh Aah Dracula slot by Barcrest

Ooh Aah Dracula is an engaging five-reel, three-row slot game from Barcrest, celebrated for its Halloween-themed gameplay centred around the iconic Dracula character. With 10 paylines and a betting range of 0.01 to 50.00 per line, the game caters to diverse budgets.

It stands out due to the slots 99 RTP and its features including Wilds, Free Spins, and unique bonuses. The game includes a High Roller option and a Best Strategy Indicator to aid players.

However, it does have some drawbacks, such as a low jackpot and no compatibility with mobile devices. Despite these limitations, Ooh Aah Dracula remains popular for desktop players, particularly for its exciting theme and substantial winning opportunities.

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Best Casinos Offering Slots with RTP 99%

To play 99% RTP slots, finding a casino offering them is key. While these slot machines are not as common as their lower RTP counterparts, several top-notch online casinos do feature them. We’ve saved you time by selecting the top casinos where these games are available, each with a welcome bonus for new players.

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Why 99% RTP Slots Are a Game-Changer

99 RTP slots are a rarity, offering one of the highest possible returns in slot gaming. They are highly sought after by both casual and serious gamblers looking for the best odds and some of the best chances to win back their wager and more.

The thing is, 99% RTP slots aren’t particularly common. There are several big hitters around, as well as some newer releases, but compared to lower RTP titles your choices are severely limited.

What’s so good about 99 RTP slots? Well, they’re supposed to be the best games to play in terms of payouts. The gameplay is just as exciting as it is with any other release – there’s a wide range of special features and bonuses to discover, as well as free spins that can generate huge potential wins. It’s simply the fact that you supposedly have an increased chance of winning, and nobody’s going to turn down better odds, are they?

You can find more information about the best RTP slots that the industry has to offer on our page too.

Benefits of 99% RTP Slots

The primary benefit of slots with RTP 99% is their potential for higher long-term returns. If you’re seeking more than just returns, these games also offer unique features and the chance for substantial payouts:

Long-term Play Advantages: Over time, 99 RTP slots can lead to less drain on your bankroll, allowing for longer play sessions and more fun.

✅ Increased Winning Odds: The high RTP significantly increases your chances of winning compared to lower RTP slots.

Special Features: Today’s 99% RTP slots go beyond classic slots by incorporating novel bonus features for engaging gameplay. You’ll find options ranging from free spins and double-your-money gambles to unique bonuses, enhancing both the excitement and potential rewards.

Jackpots: Games like Mega Joker offer not just high payouts but also the opportunity to win progressive jackpots, adding an element of life-changing possibilities to your gaming experience.

Negatives of 99% RTP Slots

No casino game is perfect, and 99% RTP slots are no exception. To help you make an informed choice, we’ve outlined some potential downsides:

❌ Limited Choice: The variety of 99 RTP slots is relatively small, as providers often hesitate to release many games in this high-payout category. While enjoyable, the limited selection can lead to repetitiveness.

Casino Bonus Wagering: Meeting wagering requirements is essential for converting online casino bonuses. However, high RTP games often contribute less towards these requirements, making it challenging to take advantage of such offers.

What is RTP in Slot Games?

RTP represents the percentage of total bets a slot machine will return to players over time. It’s something developers decide upon before release and then simulate billions of spins to ensure a game’s theoretical RTP and actual RTP match up over the long term. Take, for example, a slot game with an RTP 99%. This means, theoretically, you should expect £99 back for every £100 wagered. However, this is an average calculated over countless spins. Short-term play might see variations from this percentage.

Something that we should point out though is that online slots can come with a multi-RTP setup. This means there are different versions of the game, generally for different markets, that will have different RTP percentages. So, because of this, we strongly advise you to check which version is available at your chosen casino before playing. All you’ll need to do is load up the game and take a look at the information panel, the RTP should be listed.

If you’d like to learn more about RTP and how game developers calculate the figure for each game, you can find more info on this UKGC article about How to Calculate RTP.

Difference Between Volatility and RTP

Understanding the difference between volatility and RTP is crucial as they have a huge impact on the resulting gameplay of any online slot. While RTP estimates your theoretical returns over time, volatility indicates the frequency and size of payouts: low volatility means small, frequent wins and high volatility leads to larger but rarer payouts.

If you play a low RTP but highly volatile slot, you’re facing a higher risk. Conversely, a high RTP slot with low volatility can yield impressive results. Below, we’ve detailed the differences between volatility and RTP in a table for clarity.



Refers to the expected frequency and value of payouts

Refers to the theoretical returns a game will award

Evident in the short-term

Only evident in the long-term

Best Providers with 99% RTP Slots

Among the leading providers offering slots with a 99% RTP, the following three stand out for their exceptional offerings:

PlayTech is renowned for its innovative designs and engaging themes, consistently delivering high-quality gaming experiences.

Barcrest has a reputation for classic slot designs with a modern twist, appealing to both traditional and contemporary players.

NetEnt, known for its cutting-edge graphics and immersive gameplay, offers a range of slots that not only boast high RTPs but also provide captivating storylines and features.

Logo image for Playtech logo
Logo image for Barcrest logo


99% RTP slots offer a unique blend of exciting gameplay and improved winning odds. While they may be rare and come with certain considerations, their potential for higher returns and engaging features make them a worthy addition to any slot player’s repertoire. Whether you’re a seasoned player or new to the world of online slots, exploring these high RTP games could lead to a rewarding and thrilling gaming experience.

Your 99% RTP Slot FAQs Answered

Still have questions about these high-payout slots? Our FAQ section covers everything from their worthiness to specific game recommendations.

A 99 RTP slot is a slot game that has a Return-to-player rate of 99%, meaning it returns £99 for every £100 wagered over time.

99% RTP is a figure that applies to certain online slots that are theoretically the best games to play online. That’s because the value relates to a game’s expected payout rate over the long term, so the higher it is, the better.

If you want to give yourself the best chance of winning, slots 99 RTP are certainly worth playing. Statistically, they have the best-expected payout rates of any type of online slot. Remember though, RNG and luck play a pivotal role in any spin. Therefore, even though the odds might be slightly more favourable, there’s no guarantee that you’ll win.

When it comes to recommending the best slots, it’s difficult to pick one specific option. That’s because a game’s appeal comes down to individual preference. What one player might love, may not appeal to another. Still, we think Relax Gaming’s Book of 99 is a great 99% RTP slot. It’s modern, it has some great bonuses and it has great payout potential.

The size of your bet has no impact on a game’s RTP. To illustrate, betting more doesn’t boost the RTP. Therefore, if you wager £50 on a slot with a 96% RTP, the RTP stays constant at 96%. In essence, your bet size only alters the possible payout, as it’s proportional to your wager. However, the RTP percentage remains unchanged.

No. It’s a common misconception that online casinos can alter the RTP of slot games on their platforms. In reality, the slot games are hosted on the developers’ servers, making it impossible for casinos to modify their RTP statistics.

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Online Slot Expert

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Leanna Madden is an expert in online slots, specializing in analyzing game providers and evaluating the quality and variety of slot games. With her extensive knowledge, she guides players to the best slot options, including high RTP slots and those with exciting bonus features. Leanna's insights help players make informed decisions and enjoy rewarding slot experiences at online casinos.

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