Top Bonus Buy Slots With The Highest Rtp

Top Bonus Buy Slots with the Highest RTP

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Updated on: 6 Jun 2024
Dean McHugh

Bonus buy slots allow you to jump straight into some of the biggest action available at online casinos. Bonus buy slots have special bonus features that can provide win multipliers and potentially massive payouts. Those bonus features are usually triggered by spinning and landing on certain combinations, but they don’t come around often. This is why some slots allow you to buy entry into the bonus rounds, so you don’t need to spin and wager your way into one.

There are lots of bonus buy slots available to play, but finding the best one with the highest return to player (RTP) percentage can be like finding a needle in a haystack. That’s why we’ve provided a list of top bonus buy slots with the highest RTP you can find at online casinos today.

Blood Suckers Megaways (Red Tiger)

Bloodsuckers Megaways logo

Brought to life by Red Tiger in 2013, this vampire-themed slot is sure to send shivers down your spine. Played across 6 reels with 2 to 7 rows, Blood Suckers features an impressive RTP of 97.6%.

Being supported by the Megaways software developed by Big Time Gaming allows this slot to provide players with up to 117,649 paylines. The game still plays with high volatility, meaning that wins will be larger but less frequent during regular gameplay. There is a monumental max win of 20,521X your initial bet, so this slot truly allows you to win big.

Landing on at least 3 Scatter symbols will trigger the Blood Suckers Megaways bonus round. This provides the player free spins and a random choice of bonus features. These are hidden behind coffins that you have a choice of opening. Bonus features can include additional free spins, win multipliers, and additional or boosted Wilds. You can buy into the free spin rounds with higher amounts, which will grant you additional picks of the bonus features. Buying in with 10x, 150x, 500x, or 1,000x your bet will grant 5 free spins, with each level granting you an additional pick.

Aztec Powernudge (Pragmatic Play)

Aztec Powernudge logo

Aztec Powernudge is a visually appealing slot by Pragmatic Play and, just like Blood Suckers, features an RTP of 97.6%. It is a much newer release, being first available in 2024. The theme and mechanics are also very different as it is played across a 6 by 6 grid with no paylines. You instead win by matching at least 8 adjacent symbols with one another in this scatter pays slot. Aztec Powernudge is another high volatility slot with a maximum win amount of 5,000x your bet.

Win Multipliers can be gathered during regular gameplay, which blends in nicely with the unique Powernudge feature. This allows win multipliers to be gathered in a bar that powers up through landing on winning combinations. It is also possible to trigger free spin rounds by landing on four or more Scatter symbols. Free spins can also be triggered by the bonus buy feature at a price of 100x your bet. Four, 5, or 6 Scatter symbols can land on your opening free spin round. This will, however, lower the RTP to 96.49% during these free spin rounds.

Dead Or Alive II (NetEnt)

Dead or Alive II logo

This is an old but gold slot by NetEnt that has been entertaining players since 2009. It wasn’t until 2020 that a bonus buy feature was incorporated into the game, allowing players to trigger free spin rounds instantly. You are granted 12 free spins when using the feature buy option with a cost of 66x your stake. Scatter symbols are guaranteed on your opening round, appearing on the first, second, and third reels. This will provide an increased opportunity to win the 2,500x jackpot, triggered by landing on 5 Scatter symbols.

Dead Or Alive II is a 5-reel, 3-row slot that has a relatively high RTP of 96.8%. There are 9 paylines and the potential for a maximum win of 111,111x your initial bet. Landing on at least 3 Scatters or using the bonus buy feature will grant you a choice of 3 different types of free spins.

Train Heist spins provide a win multiplier that is increased by landing on Wilds. This also provides you with an additional free spin round, while hitting a win multiplier of 16x will grant 5 additional free spins. Old Saloon spins give a 2x multiplier on all wins, as well as granting an extra 5 rounds when landing on at least 5 Outlaw symbols. Lastly, there are the High Noon spins, providing the potential to win the maximum amount possible in Dead Or Alive II. Landing on at least 2 Wild symbols will increase your win multiplier by the same amount of Wilds that you land on. Landing on 4 Wilds will provide a 4x win multiplier, for example.

Diamond King Gold (SpinPlay Games)

Diamond King Gold logo

Diamond King Gold takes command of the Lion’s Pride with a max win potential of 10,240x and an RTP of 96.4%. Released in 2022 by SpinPlay Games, the slot is played across 5 reels and 4 rows with 1,024 paylines. There are various different bonus features available in Diamond King Gold, as well as the potential to trigger free spins. The Power Range feature places a 3x2 box in the centre of the reels. Any Wild symbol landing in this box provides a 2x win multiplier. The Roar Feature boosts this by expanding the box to cover the middle 3 reels. The win multiplier also has the potential to increase as Wilds can provide a 2x, 3x, or 5x multiplier.

The Diamond Meter can be found on the top of the game screen. It begins to fill up with every Wild with a win multiplier you land on. Higher multipliers will fill up the bar faster. A jackpot bonus feature triggers once the Diamond Meter has been filled up. This will allow you to pick and match different gems for a potential 5,000x win. Landing on at least 3 Bonus symbols will trigger free spin rounds. Alternatively, you can purchase free spins with 100x, 200x, or 300x your bet. This will randomly grant you 10 to 20, 15 to 25, or 20 to 35, depending on the bonus buy option you choose.

Beast Mode (Relax Gaming)

Beast Mode logo

Released by Relax Gaming in collaboration with CasinoGrounds in 2022, Beast Mode is a funky slot with a max win potential of 25,000x. There are 4,096 paylines spread across 5 reels and 4 rows. During regular game rounds, Beast Mode features an RTP of 96.3%; however, this is increased to 97% when using the bonus buy option. Staking 80x your bet on the bonus buy feature will grant you a choice of 3 different free spin packages.

The 3 types of spins available in the bonus buy feature can also be triggered by regular gameplay. Landing on 3 or 4 Bonus symbols will trigger free spin rounds, although you can choose to gamble it all for additional spins or higher win multipliers. This is available when landing on 3 Scatters, as landing on 4 will automatically grant the additional spins. There’s a 50/50 chance to lose your free spins or be granted additional spins when choosing this option. Afterwards, you will be taken to the spin select screen, just the same as if you had used the bonus buy feature.

Mystery Symbols Free Spins enables 2 different special symbols. Mystery symbols drop to the lowest possible slot and remain sticky during the rounds, changing to identical symbols as other Mystery symbols. The Bomb symbols expand the game board up to a maximum of 7 rows and grant an additional 3 free spin rounds.

Multiplier Ladder Free Spins start with a 1x win multiplier. This multiplier can increase in between spins and on winning rounds. Additional free spins will be granted when reaching specific win multiplier milestones. There is a potential to reach a maximum win multiplier of 500x during the Multiplier Ladder feature.

Expanding Wild Free Spins also start with a 1x win multiplier that is increased to 10x if you trigger the upgraded free spins. Wilds are the special symbol during this feature, as each adds 1x to your total win multiplier reached during the free spins so far. Wilds also expand down from where they landed, providing a larger coverage and a higher potential to trigger a winning combination.

Fruit Duel (Hacksaw Gaming)

Fruit Duel logo

Created by Hacksaw Gaming in 2022, Fruit Duel features an RTP of 96.3%. It is played across 3 reels and 3 rows with 17 active paylines. Medium volatility provides a good balance between win frequency and payout amounts for this classic-themed slot. Following the classic theme means that this is a relatively simple slot. However, it still presents players with an interesting DuelReels mechanic. This feature allows for a VS symbol to land, which converts the entire reel it lands on into Wilds. If 2 fruit symbols land on the same reel during this feature, they will duel it out for the potential of applying a win multiplier up to 100x. The max win potential for Fruit Duel is 3,333x your initial bet.

Landing on 3 Free Spin symbols will trigger 10 free spin rounds. An alternative is to use the bonus buy feature, which allows you to choose from 2 different free spin packages. The first is purchased at 10x your bet and provides free spins with a guaranteed drop of at least 1 VS symbol during every free round. The alternative package is priced at 80x your bet and provides regular free spin rounds.

Iron Bank (Relax Gaming)

Iron Bank logo

With 6 reels and 4 rows, Iron Bank offers players 4,096 active paylines and an RTP of 96.2%. Developed by Relax Gaming and released in 2020, Iron Bank has high volatility and a max win amount of 49,999x. The slot offers players a nice variety of bonus features, which can be triggered by landing on at least 3 Scatter symbols or by using the bonus buy feature. The price of activating the bonus buy feature is 100x your bet.

  • Mystery Symbols Feature - Provides the player with 8 free spins while randomly selecting a symbol to function like a Sticky Wild. An additional free spin is granted if you manage to cover a whole reel in Sticky Wilds.
  • Expanding Wilds Feature - Grants 10 free spins to the player and highlights an area within the 2 middle reels. Any Wilds that land in this area expand to cover the whole reel while granting an additional free spin round. Wilds also apply stacking win multipliers on winning rounds.
  • Multiplier Collect Feature - Triggers 12 free spins with reels 2 to 5 having win multipliers applied to them by dropping crates. Collecting crates from winning rounds boosts your win multiplier while providing the possibility of triggering additional free spins.

Gods of Asgard Megaways (Iron Dog Studios)

Gods of Asgard Megaways logo

Another slot game part of the Megaways network, Gods of Asgard Megaways, provides up to 200,704 active paylines across 6 reels and between 2 and 7 rows. Released by Yggdrasil in 2022, this slot has an RTP of 96.7% and a max win potential of 50,000x. The number of rows changes depending on the size of the symbols you land on. Bigger symbols can provide a better potential for winning combinations as more of the reel is covered by the same symbol. This Nordic-inspired slot features 4 special symbols represented by different Norse Gods. The special symbols can transform into other symbols, such as Wilds or multipliers.

Free spins are available in addition to the special system and can be triggered by landing on at least 3 Scatters, which will grant up to 20 free spins. You can also unlock these by using the bonus buy feature at a rate of 120x to 575x your bet. This will also affect the RTP at a rate of 96.3% to 96.5%. Winning combinations and triggering cascades will apply a stacking win multiplier with no max limit. In addition, your starting multiplier can be doubled with the Odin feature.

Wolf Howl (Just For The Win)

Wolf Howl logo

Wolf Howl was developed in partnership with Microgaming and Just For The Win back in 2020. It features an RTP of 96.4 across 10 paylines with a max win of 25,000x. The slot is played in a 5x3 format with landing on at least 3 Scatter symbols triggering free spin rounds. You can also buy your way into the bonus rounds for 90x, 159x, or 314x your bet in exchange for 8, 15, or 30 free spins respectively.

Free spin rounds feature Wild Calls, which adds a 1x win multiplier to all Wilds that land adjacent to a Scatter symbol. This win multiplier can go up to 5x and is then applied to your following game round.

Medusa Hot 1 (Reel Play)

Medusa Hot 1 logo

Released in 2021, Medusa Hot 1 is played in a 5x3 format across 15 paylines. The game has an RTP of 96.2% and a max win potential of 5,718x. Landing on 2 Scatter symbols will trigger a Respin feature that makes the reels with Scatters sticky. Landing on at least 3 Scatters or purchasing access with 100x your bet will unlock free spin rounds. You will be granted 3 randomly placed sticky Scatter symbols no matter how you manage to trigger the free spin rounds. Any additional Scatter symbols that you land on will also become sticky.

Higher-paying symbols will appear at the top of the game screen during free spin rounds. These will be ordered from lowest to highest paying symbols. At the end of your spin, the sticky Scatters will transform into these symbols. Landing no additional Scatters will cause the active Scatters to turn into the next paying symbol on the list. If you manage to land additional Scatters during the round, the Scatters will transform into the same symbol.

Net Gains (Relax Gaming)

Net Gains logo

Net Gains is a seafaring slot developed by Relax Gaming and released in 2022. Played across 6 reels and 4 rows, there are 4,096 active paylines with an RTP of 96.1%. There are 3 different bonus rounds providing various opportunities to win during your free spin rounds. Landing on 3 of the corresponding bonus symbols will unlock 1 of the 3 bonus features.

  • Sticky mystery - This feature unlocks the possibility of landing on mystery symbols that will fill up a bar, which will grant additional free spin rounds when full.
  • Stacked Wilds - Boost your Wilds in this bonus feature by making them sticky during the next 3 rounds with winning combinations. Alternatively, Wilds can come with win multipliers attached.
  • Coin Collection - Collection Chests will appear during your rounds in this feature. These chests can be full of coins that will fill up your coin meter. A full meter will grant additional free spins.

Landing on 3 Scatter symbols or paying 100x your bet will unlock free spin rounds. Buying your way into the free spin rounds will allow you to choose between the 3 bonus features. The free spins can randomly unlock Hot Mode when first triggered. This will provide a greater opportunity for higher payout combinations.

Book of Power (Relax Gaming)

Book of Power logo

A relatively recent release by Relax Gaming, Book of Power became playable in 2023 with an RTP of 96.1%. Five reels, 3 rows, and 10 paylines make up this Egyptian-themed slot providing a max win potential of 15,000x.

There are 2 different book symbols, which both act as Wilds and Scatters simultaneously. The regular book symbol will unlock free spins, while the Power Book provides Power free spins. You must land at least 3 of the same book symbols to unlock up to 20 free spin rounds. Hot Mode is available for both bonus features, which provides a higher potential for bigger winning combinations.

A 10x, 100x, or 500x win multiplier will be applied to your regular free spin rounds. One of the game symbols will be randomly selected to become an expanding symbol. Landing on 2 book symbols during any of these rounds will trigger an additional symbol as expanding, as well as unlock 5 extra spins. Unlocking additional expanding symbols will provide a stacking win multiplier of up to 9x.

Power free spins function much like regular free spins but with an added feature. If a Power Book symbol lands on reels 2, 3, or 4, it will turn those reels gold. This means symbols will expand even if no selected expanding symbol is landed during the round.

Fire in the Hole 2 (NoLimit City)

Fire In the Hole 2 logo

NoLimit City released Fire in the Hole 2 in 2024, providing players with a 6x6 slot with a max win of 65,000x. The RTP varies from 87% to 96%, depending on the bonus round you unlock. There are 46,656 paylines and a wide variety of bonus features. You can buy your way into the Lucky Wagon Spins at a rate of either 70x, 200x, 600x, or 3,600x your bet. This will grant you 3, 4, or 5 spins respectively. The 3,600x option grants a guaranteed collector for the bonus feature. Alternatively, you can land on at least 3 Scatter symbols to trigger the Lucky Wagon Spins.

Lucky Wagon Spins come with a variety of features that can enhance your win potential. This includes increased coin values, win multipliers, and Dynamite, which can expand the game board. There’s a lot going on in Fire in the Hole 2 and it is definitely one of the most feature-rich games we have played!

Sugar Supreme Powernudge (Pragmatic Play)

Sugar Supreme Powernudge logo

A sweet treat provided by Pragmatic Play since its release in 2023, Sugar Supreme Powernudge features a max RTP of 96% in a 6x6 format. This is a Cluster Pays slot, so it has no active paylines, but it does have a max win potential of 5,000x. There is a Powernudge feature that will randomly trigger and provide the opportunity for win multipliers.

Free spin rounds can be purchased at a race of 100x your bet or be triggered from landing on at least 3 Scatters. This will grant up to 20 free spins with the Powernudge feature triggering on every spin. Landing on another 3 Scatters will unlock an additional 10 free spins.


As you can see, there are a lot of top bonus buy slots with high RTP. These slots vary greatly in both their formats and the features available to players. While many of them provide the player with a few different options for free spins, others limit the player to a single package.

The trick is to determine for yourself whether buying into a bonus round is worth your time and money. A bonus buy option of 3,600x does seem a little extreme, but 100x can be quite reasonable. It all depends on how comfortable you are with the added risk and reward potential. Whatever slot you decide on, a higher RTP is usually a great starting point for choosing a game that is right for you.

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