Bonus Buy Slots – Guide and List of All Feature Buy Games

The ultimate goal in most online slots is to trigger the free spins or bonus round. With the built-in bonus buy (also called feature drop or bonus buy-in), you basically have the option to pay for the free spins, additional features or multipliers. Find out how bonus buy slots work and which games have this feature.

Key Sections to Buying a Bonus:

The Best Slots to Buy the Bonus

Best slots to buy the bonus

We looked at dozens of bonus buy slots to identify some with the highest RTPs when buying free spins. Therefore, the focus is on the buy-in RTP rather than the base game RTP. If you are new to bonus buy slots, check out the FAQ.

By the way, some developers like BGaming and Pragmatic add another side bet feature to some of their games called “buy chance” (ante bet). Simply put, this increases the chance of a successful spin. Note that the high RTP values you see below will represent the most expensive buy-ins.

Smartphone users: To view the table below in full, please scroll sideways.

Game Provider Base Game RTP Bonus Buy RTP Buy Chance RTP Volatility Buy-in (X Bet)
Aloha King Elvis BGaming 94.98% 96.87% – 98.69% 95.06% – 95.32% Medium-high 40x – 48x
Money Train 2 Relax Gaming 96.40% 98.00% High 100x
White Rabbit Big Time Gaming 97.24% 97.24% – 97.77% High 100x
Blood Suckers Megaways Red Tiger 97.66% 97.68% Medium 10x – 1000x
Savage Buffalo Spirit BGaming 97.10% 97.26% High 100x

Note that due to the increasing regulation of online gambling, the RTP rate of slot machines may vary depending on the country in which they are offered. This can lead to significant deviations of up to 5%! In fact, a real flop, to say the least! If you want to check the RTP for yourself, look for the payout table or the game rules in the respective title.

The Top Games at a Glance

Below is a brief summary of the games above. Remember, these were chosen for their high bonus buy RTP rates. There are of course several more games in this category that are recommended – see here.

Aloha King Elvis by BGaming

When was the last time you heard a frog singing songs by Elvis Presley? Really never? Then you should take a look at Aloha King Elvis, which offers three free spins rounds – one with three jackpots. The RTP of the base game is 94.98%, which admittedly doesn’t revive the King of Rock ‘n’ Roll. But just look at the feature buy options, which boost the RTP to a respectable 96.87% all the way up to 98.69%! The ante bet (buy chance) feature is also available and offers an x2.5 extra chance to land one of the bonus rounds.

BGaming Aloha King Elvis buy bonus slot

To buy a bonus in Aloha King Elvis, you have two choices. Well, three to be exact, because one of the two free spins rounds also gives you two options to choose between different special symbols. This bonus costs 48x your bet, while the so-called Coin Respin, where you can win one of three jackpots, costs 40x your bet.

  • How do we like it? Frog legs taste kind of like chicken. Does that translate to this slot machine? Let’s put it this way: it’s light entertainment. The medium to high volatility keeps you on your toes because there’s plenty happening on the reels. Of course, there’s always an emotional connection to a slot machine that gives you a big win. But if it doesn’t pay, you may be out of there sooner than you think (not to mention the RTP of the base game). Score: 3 / 5

Money Train 2 by Relax Gaming

There are three Money Train titles and they are often mentioned among the best feature buy slots. Especially the first two games of the series stand out with their impressive RTP of 98.00% in the buy feature. In the base game, the return to player of Money Train 1 and 2 is 96.20% and 96.40% respectively, which is the average for online slots. Therefore, Money Train 2 has a slight edge overall, in addition to the prospect of a juicy maximum win of 50,000x your bet. Money Train 3 is the weakest of the bunch, so to speak, with a buy-in RTP of 96.50%. Nevertheless, it’s also a decent slot machine.

Relax Gaming Money Train 2 slot free spins

Money Train 2 packs several exciting features not included in the first title. One new feature is the re-spin mechanic, which can add an unlimited win multiplier until a winning combination is landed. To buy the bonus, you have to pay 100x your bet. That is, if you don’t want to wait for the free spins to trigger randomly.

  • How do we like it? It’s good. We are also pleased that this isn’t another game with collapsing / tumbling reels. Rather, this Relax Gaming online slot is heavily focused on multipliers, which can’t be a bad thing. Score: 3.5 / 5

White Rabbit by BTG

It doesn’t get more Megaways than this! White Rabbit is considered a Big Time Gaming classic and is consistently mentioned among the best feature buy slots – the first of its kind. There are random multiplier wilds, free spins with expanding reels and even more wilds… Just try it out for yourself. And if not with real money (or crypto), then in the free play mode.

Big Time Gaming White Rabbit feature drop slot

This BTG slot also offers something that no other software provider seems to do. It has so-called feature drop symbols hat appear randomly on the reels (see above) and reduce the prize of the buy-in if you decide to pay for the bonus. However, this rarely happens, which makes this more of a gimmick. Also, if you change your betting limit, the collected coins will be reset. Of course, you can always return to your original bet and continue collecting coins. If you can’t help yourself, buying free spins will cost you 100x your bet (or slightly less if you have collected enough coins).

  • How do we like it? The Alice in Wonderland theme may not be for everyone, but the gameplay of White Rabbit is solid. Although it is a title with high volatility, there is a lot of action on the reels. So it is not uncommon for the free spins to be triggered randomly. White Rabbit also has the charisma of slot machines found in brick and mortar casinos that many titles on the internet lack. Score: 4.5 / 5

Blood Suckers Megaways by Red Tiger

Think of one of the best NetEnt online slots and Blood Suckers comes to mind. Not too volatile and with an RTP of 98%, this slot is definitely recommended. However, this is the original. Here we present the Red Tiger take of the NetEnt classic called Blood Suckers Megaways.

Red Tiger Blood Suckers Megaways buy bonus slot

The RTP in this game speaks for itself with 97.66% in the base game. With the feature buy, it increases slightly to 97.68%. So is it worth it?

For one, you can participate in the buy-in action with as little as 10x your stake. This triggers up to a 5x multiplier on all wins in the following spin. High rollers desperate to trigger the free spins with many more perks (namely random and super wild symbols as well as extra spins and multipliers) can buy the bonus for 150, 500 and 1000x their stake respectively.

Although the game is said to have medium volatility, we lean more towards high volatility (yes, potential mega wins that happen once every millennium). 😉

  • How do we like it? Truth be told, this is one of those titles where we prefer to stick to the original. Score: 2 / 5

Savage Buffalo Spirit by BGaming

It is noticeable that many games with feature buy are designed to be extravagant, i.e. many bonus specials and an all ways win reel setup. Sometimes more is not better. Savage Buffalo Spirit is a simpler game with features that make for great gameplay (namely a wild that pays double and 15 free spins with a x3 multiplier). Sound familiar? There are several other highly acclaimed slots like Mega Moolah or Lucky Lady’s Charm that follow the same principle.

BGaming Savage Buffalo Spirit buy bonus slot

Even though this BGaming slot only just makes it past the 97.10% RTP mark in the base game, we’d play it even if it were lower, because 97% is pretty darn good.

On the other hand, the volatility of this title is not for the faint-hearted. If you buy the bonus, you might feel like a herd of buffaloes is trampling your bankroll. The brave ones who decide to push through have to dish out 100x their stake. At the same time, the RTP increases to 97.26%.

  • How do we like it? No idea why, but buffaloes click with us. Jokes aside, anything that plays like Savage Buffalo Spirit and has a high RTP goes down well with us. However, the level of volatility can be quite hefty. You really need to be lucky enough to retrigger the free spins in the same bonus round. Score: 4 / 5

Other Honourable Mentions

More titles that didn’t make this list but that you should give a run for their money (PS: the list will be continuously expanded):

  • Extra Chilli by Big Time Gaming
  • Dead Man’s Trail by Relax Gaming
  • Lady Wolf Moon Megaways by BGaming
  • San Quentin by Hacksaw Gaming
  • Wanted Dead or a Wild by Hacksaw Gaming

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Bonus Buy Slots FAQ

Bonus buy slots are played like any other conventional online slot. The only thing that distinguishes them from regular titles is the option to buy the bonus round (buy-in) for a multiple of your original bet. Usually these are free spins, but they can also include some additional features or multipliers.

This concept can be a bit confusing at first, especially with the more elaborate games like those from Hacksaw Gaming. However, the bonus buy-in is always optional. In addition, a slight RTP boost is common when paying for the feature, but this is not always the case. Some games even specify a lower RTP for buy-ins.

Several slot machine providers have already introduced this add-on. These include the pioneer Big Time Gaming (BTG), Quickspin, Pragmatic Play and Spinomenal, to name just a few outstanding casino software providers. The latter two, by the way, have the largest number of buy-in slots. More about this under the FAQ point "how do I find bonus buy-in slots?".

Some popular slots with bonus buy are Extra Chilli and White Rabbit, all Megaways titles by BTG, Money Train 2 by Relax Gaming, Big Bad Wolf Megaways by Quickspin and Sweet Bonanza by Pragmatic Play. Incidentally, the so-called Megaways slots (these have thousands of "ways to win") were also developed by BTG. This game mechanic is now licensed by other game providers so that they too can publish their own Megaways titles.

Yes, once you have claimed the welcome bonus, you can buy free spins for the exclusive feature drop slots. However, we advise you to check the bonus terms and wagering requirements before doing so. You need to make sure that the bonus rules allow you to claim your winnings from the bonus and the feature buy.

This depends on the game. There are also differences between the software providers. The price starts at about 50 times a bet and can reach 2000 times for higher winning odds. This is quite expensive for many recreational gamblers. However, there are some options that are cheaper, although your chances of winning are comparatively lower if you pay less.

You might be wondering if certain slot machines pay out more. Well, yes! An RTP of around 96% is the average for online slots, but there are some that even break the 97% and 98% barrier. See the following link for our section on high RTP slots, but these are usually titles without the bonus buy feature.

So what are the best slots to buy the bonus? There are several, but we chose Aloha King Elvis, Money Train 2, White Rabbit, Blood Suckers Megaways and Savage Buffalo Spirit based on their feature buy RTP rates - see more details here.

However, keep in mind that your winnings will always depend on luck, no matter how high the return to player rate in a slot game is.

Free spins alone are no guarantee for big winnings. In our experience, you often win back the amount you wagered for the purchased free spins. But even then, it all depends on the volatility and RTP (return to player) rate of the game and, of course, your luck! Also note that almost all of these games have high volatility.

If you are willing to pay a premium to grab the free spins right away, the bonus purchase option is an exciting way to do it. However, if you only have a small balance, the buy-in feature is not recommended. In fact, it can be considered more of a "toy" for high rollers.

Some online casinos in Asia list the bonus buy games in the navigation menu or via their search function. So just look there and you will find them. If not, it's a bit like looking for a needle in a haystack. And that's why you're here. Check out our comprehensive list of feature buy slots with their respective RTPs and buy-in rates.

If you want to go searching for yourself, the providers with more than a handful of bonus buy slots include: 1x2 Gaming, Betsoft, BGaming, Big Time Gaming, Booming Games, ELK, Endorphina, Game Art, Games Global, Hacksaw Gaming, Mascot, No Limit City, OneTouch, Playson, Pragmatic Play, Push Gaming, Quickspin, Red Tiger, Relax Gaming, Skywind, Slotmill, Spade Gaming, Spinomenal, Tom Horn, True Lab, Wazdan, Yggdrasil.

First of all, bonus buy is not supported by every casino software provider. However, it can also happen that a game with this feature is not offered in the same way at the online casino. In other words, the slot machine is available, but the buy-in may not be due to licensing/regulatory reasons.

In summary, some online casinos make it dependent on the country or region whether the games are available or not. We cannot speak for every country or region. Therefore, check the betting site of your choice first to see if they offer the bonus buy games you like. We have found that BGaming, Booming, Mascot and Zillion titles are available in just about every jurisdiction.

With 20 dollars, we would limit ourselves to the lowest wagers and stick to low to medium volatility games. However, we would not pay for the bonus. If you trigger the free spins within the first 50 or so spins, you could already be in for a handsome win. Be that as it may, in the Sweet Bonanza slot (as an example), the feature buy costs $20 if you play with the minimum stake of $0.20 (or currency equivalent). This is therefore the cheapest bonus buy-in option in this game.

Another popular slot machine in this category is San Quentin by developer No Limit City. Here you have the option to choose between three bonus buy features. These cost 100, 400 and 2000 times your bet respectively (i.e. $20, $80 and $400 if you play with the minimum bet of $0.20). For the maximum prize, you get a bonus round with all the trimmings, so hardly any spin will be a miss.

Bonus Buy Feature Variations

As already mentioned, many slot developers have already integrated the feature into their games. Well-known examples are BTG, BGaming, Pragmatic, No Limit City and Hacksaw Gaming. The simplest variant is that you only pay to trigger the bonus round, e.g. free spins (see example below).

BGaming Lady Wolf Moon buy bonus slot

However, some developers have added further buy-in options to their slots. These work as follows:

1) Choose the Buy-in You Like

Since slot gamblers have different preferences, simply buying free spins may not cut it. Therefore, there are also games that offer different buy options with adjusted levels of volatility. This again applies to the more elaborate titles such as those from No Limit and Hacksaw. The drop feature of the BTG, Pragmatic and Quickspin titles is kept rather simple.

There are three main variants:

  • Some games offer more than one type of free spins. By paying for the bonus, you can choose which one you want to go for. This is often the case with games from Hacksaw Gaming and NoLimit City.
  • With the different buy-in options available to you, you might pay a similar price, but you would compromise on the number of spins or multipliers.
  • Deriving from the previous example is the option to pay for a different number of spins, as with BTG’s Vegas Megaways slot (see below).
Big Time Gaming Vegas Megaways feature drop slot

What is volatility in slot machines? Roughly summarised, high volatility means that games pay out less frequently but promise higher winnings in the long run. Low to medium volatility games have the opposite effect, namely more frequent payouts with comparatively lower winnings.

2) Cheaper Buy-in Options for a Smaller Bankroll

We would argue that the buy bonus feature is for high rollers and seasoned players. However, players with a smaller bankroll can also enjoy it. Games that offer more than one option to buy the bonus may have much cheaper options. The tradeoff is that you get significantly less for your dollar.

  • This could be a special symbol on the reels for a spin, as in the example of Harvest Wilds (see below) and Rotten by Hacksaw Gaming. To activate the feature, you need to wager 5x times and 20x your bet respectively.
Hacksaw Gaming Harvest Wilds buy bonus slot

  • Another example is Red Tiger’s Blood Suckers Megaways, where you can trigger a multiplier (up to x5) for all wins in the following spin. This costs 10x your bet (see below).
Red Tiger Blood Suckers Megaways buy bonus slot

  • There are also games where you can pay to increase the chances of a successful outcome. This type of side bet is called “buy chance” or “ante bet”. By doing so, you either increase your odds of winning and/or trigger the free spins round, as in Sweet Bonanza by Pragmatic Play. Buy chance can be found in many titles from Pragmatic and BGaming, but also in some titles from Hacksaw Gaming (it is just designed slightly differently).
Pragmatic Play Sweet Bonanza bonus buy slot

The Cost of Paying a Bonus

Buying a bonus usually costs between 50x and 100x your bet. There is a wide selection, so you can also find cheaper options and equally challenging prices for high roller gamblers – list of games and betting limits.

Some of the most expensive slot machines with bonus buy are:

Game Provider Buy-in (X Bet)
Best bonus buy slot San Quentin No Limit City 100x – 2000x
Book of Duat Quickspin 150x – 1600x
Legion X No Limit City 70x – 1200x
Mental No Limit City 80x – 1000x
Tiger’s Glory Ultra Quickspin 80x – 1000x
Blood Suckers Megaways Red Tiger 10x – 1000x

There are of course other examples (in the range of 200x upwards) that would also be considered expensive by many players. However, as you can see, No Limit City and Quickspin stand out with the majority of high-priced bonus buy-in slots. Nevertheless, the buy-in entry point for NoLimit games can be considered reasonable, as it usually starts at 60x your bet.

What’s the Benefit of Buying a Bonus?

The reason players buy a bonus is 1) the thrill, 2) using it as a shortcut to trigger the free spins and 3) potentially better odds and a higher RTP!

Ideally, the latter is also true. However, not all titles play out the purchased free spins at a higher RTP. Some stay at the same RTP or there is only a marginal difference. But there are also various slots where the RTP is lower in the feature.

A good example is Marching Legions by Relax Gaming with an impeccable RTP of 98.12% in the base game. However, when you buy the bonus, it drops to 97.13%. Still great, but there are better ones out there.

Try Out the Games in Demo Mode

Many online casinos offer the option to play the slots in demo mode (free play). The free play mode is not an indicator of the odds of winning with a buy-in. But at least you can get a feel for the feature and of course see how a game’s free spins round is build up.

If you play with real money, you can of course win a lot with this feature, but apart from the fact that you have to enjoy the game, it ultimately comes down to pure luck. This brings us to the next point.

The Controversies of This Betting Feature

The downside this feature might have is that it can burn a hole in your bankroll… But jokes aside. As exciting as it is to trigger the free spins with the press of a button, it can be quite addictive. In other words, you have to be able to control yourself, because if you get carried away, you can lose a lot of money in a short time. Problem gamblers should look into the responsible gambling tools provided by the casinos in the account area, where you can set betting limits, among other things.

There Are No Guaranteed Winnings

It is normal to want to win back at least the stake for the buy-in. If the free spins round doesn’t go well, it is still possible to win back the full or close to the amount you wagered. However, this does not happen every time.

In addition, the games become more volatile over time. Not only that, but most buy-in games are highly volatile to begin with. This screams of a possible losing streak. As with anything to do with gambling, you should do it in moderation. If you feel lucky and have the bankroll, go for it. It’s like roulette, everything on one colour! If you are reluctant to lose large sums of money gambling or have a small bankroll anyway, you should refrain from buy-ins.

Feature Buy is Not Available in Every Country

In conclusion, this is why feature buy and other betting options (such as auto play) are banned in strictly regulated countries. You can think what you like about it.

The actual games are offered in the casinos, but the buy-in as well as the ante bet feature may be missing. Fortunately, we do not yet have this problem in Asia and Oceania, at least as far as online gambling is concerned (of course, there are exceptions like China). In Australia, on the other hand, is more complex, because strict regulations prevail there as well. So even if you open a player account at a bonus buy casino, the feature drop pokies or entire groups of games or software providers may not be available.

Bonus Buy Tip – Do the Maths

You could try playing a slot machine at the same bet until you trigger the free spins. Make a note of the amount you spent from your initial balance and see how much you would have spent if you had simply paid for the bonus.

The price for the buy-in is usually between 50 and 100 times your chosen stake. This reflects the average number of spins that would be needed to trigger the bonus round in the natural way.

Then see how much you win when you either trigger the bonus randomly or when you pay for it (although there is no guarantee of reliable numbers as it is pure chance). However, you can get a better feel for how much you are willing to risk by either playing with higher bets (perhaps using the ante bet feature) or simply buying the free spins. Just a thought…

How to Choose a Bonus Buy Casino

Admittedly, the term bonus buy casino is a bit misleading, because every site that offers the games of the providers mentioned here has them automatically. So it’s almost every gambling site (give or take a software provider or two).

Basically, it boils down to what we talked about earlier in terms of local gambling regulations. First, you need to make sure that the online casino of your choice supports player registrations from your country. Via our casino list, you can find out both about the accepted countries/regions and which currencies are supported. Another common option is to use cryptocurrencies for betting.

  • Australia: It’s complicated, the choice of available providers is slim. These include: BGaming, Booming, Mascot, Zillion. We recommend creating a player account at the following sites: BitStarz, Kosmonaut
  • Countries where most bonus buy slots are offered (exceptions reserved): Cambodia, India, Indonesia, Japan, Malaysia, New Zealand, Philippines, Singapore, South Korea, Thailand, Vietnam

List of Bonus Buy Slots 2024

Below is a list of various developers and some of their bonus buy-in slots (in alphabetical order). The list is constantly being expanded. Games that reach the ninety-seven percent RTP threshold are marked accordingly.

Best Bonus Buy Slots Compilation

Smartphone users: To view the table below in full, please scroll sideways.

Game Base Game RTP Bonus Buy RTP Buy Chance RTP Volatility Buy-in (X Bet)
Best bonus buy slot Aloha King Elvis 94.98% 96.87% - 98.69% 95.06% - 95.32% Medium-high 40x - 48x
Best bonus buy slot Money Train 2 96.40% 98.00% - High 100x
Best bonus buy slot Dead Man's Trail 96.29% 98.00% - High 100x
Best bonus buy slot Money Train 96.20% 98.00% - High 80x
Best bonus buy slot White Rabbit 97.24% 97.24% - 97.77% - High 100x
Best bonus buy slot Blood Suckers Megaways 97.66% 97.68% - Medium 10x - 1000x
Best bonus buy slot Savage Buffalo Spirit 97.10% 97.26% - High 100x
Best bonus buy slot Lady Wolf Moon Megaways 97.04% 97.25% 96.87% High 90x
Best bonus buy slot Miss Cherry Fruits Jackpot Party 94.65% 96.90% - 97.13% 94.77% - 94.83% Medium-high 40x - 48x
Best bonus buy slot Book of Cats Megaways 96.95% 97.07% - 97.11% 97.18% High 100x
Best bonus buy slot Maneki 88 Gold 96.79% - 97.06% 96.90% - 97.00% - High 45.5x
Best bonus buy slot Tiger's Glory Ultra 96.51% and 96.71% (two game modes) 96.76% - 97.00% - High 80x - 1000x
Best bonus buy slot Hazakura Ways 96.37% 97.00% - High 80x
Best bonus buy slot Wild Chapo 96.36% 97.00% - Medium-high 60x
Best bonus buy slot Beast Mode 96.32% 97.00% - High 80x
Best bonus buy slot Helios' Fury 96.27% 97.00% - High 90x
Best bonus buy slot Volatile Vikings 96.23% 97.00% - High 100x



There are many bonus buy slots from BGaming, a casino software provider also known for its crypto-friendly games. These include some well-designed slots like Aztec Magic Megaways, Lady Wolf Moon Megaways as well as some pub-style slots like Wild Cash, but thematically they come across a little more playful. Judge for yourself.

BGaming slots are known for offering both the buy-in and the double chance or buy chance option (not all, but most titles). To buy the free spins or the bonus round, you have to dish out between 40 and 100 times your bet. Activating the double chance usually costs half of your bet extra.

Smartphone users: To view the table below in full, please scroll sideways.

Game Base Game RTP Bonus Buy RTP Buy Chance RTP Volatility Buy-in (X Bet)
Best bonus buy slot Aloha King Elvis 94.98% 96.87% - 98.69% 95.06% - 95.32% Medium-high 40x - 48x
Aztec Magic Megaways 96.72% 96.71% 96.76% High 100x
Beer Bonanza 95.97% 95.99% 96.00% High 100x
Big Atlantis Frenzy 96.65% - 96.77% 96.76% - 96.77% 96.65% - 96.78% High 80x
Book of Cats 94.00% 94.00% - Medium-high 94x
Best bonus buy slot Book of Cats Megaways 96.95% 97.07% - 97.11% 97.18% High 100x
Elvis Frog True Ways 96.79% 96.70% - 96.72% 96.82% High 100x
Gangsterz 96.25% 96.02% - High 100x
Gold Rush With Johnny Cash 96.14% 95.94% - 96.03% - High 50x
Halloween Bonanza 96.11% 96.52% 96.19% High 100x
Joker Queen 96.00% 95.72% 96.38% Medium-high 84x
Best bonus buy slot Lady Wolf Moon Megaways 97.04% 97.25% 96.87% High 90x
Best bonus buy slot Maneki 88 Gold 96.79% - 97.06% 96.90% - 97.00% - High 45.5x
Best bonus buy slot Miss Cherry Fruits Jackpot Party 94.65% 96.90% - 97.13% 94.77% - 94.83% Medium-high 40x - 48x
Road 2 Riches 96.27% 96.27% 96.27% High 100x
Penny Pelican 95.99% 95.94% - High 75x
Best bonus buy slot Savage Buffalo Spirit 97.10% 97.26% - High 100x
Sweet Rush Megaways 96.72% 96.71% 96.76% High 100x
Wild Cash 96.23% 95.99% - High 80x
Wild Cash X9990 96.12% 96.07% - High 100x

Big Time Gaming (BTG)

Big Time Gaming

Big Time Gaming, the pioneer of Megaways slots, was also the first to introduce the bonus buy option they call "feature drop". BTG's slots, however, do not usually have the double chance feature for side bets (also called ante bet). Their hallmark in terms of a high RTP title is White Rabbit (up to 97.77% RTP). Incidentally, this is the first feature drop slot of its kind. All other games hover around the 96.50 percent mark.

The feature drop purchase costs between 50 and 300 times your bet on BTG slot machines.

Smartphone users: To view the table below in full, please scroll sideways.

Game Base Game RTP Bonus Buy RTP Volatility Buy-in (X Bet)
Extra Chilli 96.15% - 96.41% 96.26% - 96.82% High 50x
Castle Of Terror 96.72% 96.73% High 70x - 200x
Christmas Bonanza 96.00% 96.11% High 90x
Gifts of Fortune 96.29% 96.29% High 70x - 200x
Golden Catch 96.53% 96.53% High 100x
Max Megaways 96.37% 96.37% High 75x - 200x
Outlaw 96.10% 96.16% High 70x - 300x
Over The Moon 96.55% 96.55% High 70x - 140x
Rasputin Megaways 96.68% 96.68% High 100x
The Race 96.27% 96.36% High 100x
Vegas Rush 96.44% 96.45% High 60x
Vegas Megaways 96.29% 96.30% High 75x - 150x
Best bonus buy slot White Rabbit 97.24% 97.24% - 97.77% High 100x

Hacksaw Gaming

Hacksaw Gaming

Hacksaw Gaming delivers very polished looking games with generally more mature themes (Egyptian gods, mythologies, etc.). However, they fall a bit flat in terms of their RTP rates, which barely reach the 97 percent mark. In any case, their titles are a real eye-catcher with generally large reel grids (not the typical 5x3 reel video slot). As a result, these games are often more elaborate and offer a high winning potential in the order of 10,000x your stake and more. Popular titles include Chaos Crew and Wanted Dead or a Wild. The volatility of these titles is also high across the board!

The buy-in feature is an integral part of many Hacksaw Gaming slots. The buy chance option can also be found in various titles. It also works like a feature buy, i.e. the option to activate special symbols on the reels like scatters or wilds. In short, you have more options than just buying a free spins round. If you buy any bonus, it will cost you 3 to 400 times your stake.

Smartphone users: To view the table below in full, please scroll sideways.

Game Base Game RTP Bonus Buy RTP Buy Chance RTP Volatility Buy-in (X Bet)
Aztec Twist 96.36% 96.57% - Medium 115x
Born Wild 96.20% 96.28% - 96.35% - Medium 80x
Buffalo Stack 'N' Sync 96.36% 96.46% - 96.50% 96.40% High 100x - 250x
Chaos Crew 96.30% 95.92% - High 129x
Cubes 2 96.33% 96.30% - High 109x - 129x
Dork Unit 96.24% 96.35% - 96.38% 96.41% Medium 100x - 200x
Double Rainbow 96.39% - 96.32% - 96.42% Medium-high 10x - 50x
Frutz 96.40% 96.37% - 96.79% - Medium-high 93x - 200x
Gladiator 96.31% 96.43% - 96.46% 96.40% - 96.45% High 10x - 400x
Hand of Anubis 96.24% 96.18% - 96.29% - High 129x - 200x
Harvest Wilds 96.35% - 96.27% - 96.38% Medium-high 5x - 100x
Magic Piggy 96.19% 96.26% 96.07% - 96.34% Medium 3x - 200x
Stack'Em 96.20% 96.20% - High 129x
Rocket Reels 96.30% 96.34% - High 129x
Rotten 96.27% 96.26% 96.16% - 96.26% High 3x - 250x
Stormforged 96.41% 96.24% - 96.34% 96.24% - 96.43% Medium-high 3x - 200x
Temple of Torment 96.20% 96.28% - 96.29% 96.25% - 96.43% High 3x - 200x
The Bowery Boys 96.41% 96.35% - 96.48% - High 80x - 300x
Wanted Dead or a Wild 96.38% 96.27% - 96.43% - High 80x - 400x
Warrior Ways 96.33% 96.44% - 96.51% - High 100x - 400x

No Limit City

No Limit City

No Limit City slots are comparable to those from Hacksaw Gaming, as they are also quite extensive. Titles like San Quentin (with one of the most expensive bonus games of 2000x) and Mental just look sleek and await you with pretty interesting themes that are often dark, apocalyptic and sarcastic in a funny way. There are no fruit symbols and cute characters here (okay, except for Bonus Bunnies).

As with Hacksaw Gaming, the bonus buy-in feature is an integral part of many No Limit City slot machines. Sometimes there are up to six bonus buy options, including many special features. Due to their nature, the games offer some great maximum wins in the range of 30,000x your bet and more.

Another aspect that stands out is that although the games are in the 96% RTP range, the bonus buy RTP in relation to the base game RTP is comparatively higher than other providers' games. Buying a free spins round or feature in No Limit City slots will cost you between 60 and 2000 times your bet.

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Game Base Game RTP Bonus Buy RTP Volatility Buy-in (X Bet)
Barbarian Fury 96.06% 96.32% High 70x
Bonus Bunnies 96.14% 96.43% Medium-high 60x
Buffalo Hunter 96.01% 96.34% - 96.41% High 100x - 600x
Bushido Ways 96.01% 96.13% - 96.82% High 75x - 700x
Deadwood 96.02% 96.06% - 96.12% High 71x - 750x
Dragon Tribe 96.07% 96.24% - 96.71% High 80x
East Coast vs West Coast 96.04% 96.20% - 96.89% High 80x - 420x
El Paso Gunfight 96.05% 96.12% - 96.79% High 80x - 800x
Evil Goblins 96.14% 96.03% - 96.81% High 60x - 666x
Fire in the Hole 96.06% 96.07% - 96.96% High 60x - 500x
Hoarder 96.14% 96.38% - 96.68% High 95x - 777x
Infectious 5 96.02% 96.12% - 96.81% High 75x - 555x
Kiss My Chainsaw 96.10% 96.03% - 96.48% High 66x - 155x
Legion X 96.04% 96.24% - 96.71% High 70x - 1200x
Mental 96.08% 96.17% - 96.68% High 80x - 1000x
Pearl Harbor 96.21% 96.12% - 96.33% High 60x - 712x
Remember Gulag 96.08% 96.56% - 96.94% High 78x - 486x
San Quentin 96.03% 96.26% - 96.95% High 100x - 2000x
Serial 96.07% 96.04% - 96.38% High 78x - 480x
Warrior Graveyard 96.16% 96.21% High 72x - 666x

Pragmatic Play

Pragmatic Play

Pragmatic Play has been a staple of online casinos for years, both in terms of slots and Asian live dealer games. They were also early to support the bonus buy-in feature in their slots, which is why you can find it in so many titles (as long as the online casino can offer them too). Ante bet can also be found in various trademark games such as Sweet Bonanza and Gates of Olympus.

Buying free spins in Pragmatic Play games is extremely straightforward. In almost all slots, 100x your bet is required to make a buy-in. Considering the many options available in No Limit City or Hacksaw games, this is a little uninspiring (as are the RTPs), but it's not a deal breaker!

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Game Base Game RTP Bonus Buy RTP Buy Chance RTP Volatility Buy-in (X Bet)
Barn Festival 96.45% 96.45% - High 100x
Big Juan 96.70% 96.53% - High 100x
Buffalo King 96.06% 96.06% - High 75x
Drago - Jewels of Fortune 96.50% 96.50% - High 100x
Fruit Party 96.47% 96.47% - High 100x
Gates of Olympus 96.50% 96.50% 96.50% High 100x
Great Rhino Megaways 96.58% 96.58% 96.58% High 100x
Jewel Rush 96.47% 96.47% - High 100x
John Hunter and the Book of Tut 96.50% 96.50% - High 100x
Lucky Lightning 96.45% 96.48% - High 100x
Power of Thor Megaways 96.55% 96.97% - High 100x
Release the Kraken 96.50% 96.50% - High 100x
Rise of Giza 96.49% 96.49% - High 80x
Starlight Princess 96.50% 96.50% 96.50% High 100x
Sugar Rush 96.50% 96.50% - High 100x
Sweet Bonanza 96.48% - 96.51% 96.51% 96.51% High 100x
The Dog House Megaways 96.55% 96.55% - High 100x
Wild West Gold 96.51% 96.51% - High 100x
Wild West Gold Megaways 96.44% 96.45% 96.41% High 100x
Yum Yum 96.43% 96.67% - High 100x



Quickspin, which in our opinion is not so well known for feature drop games, also has some good titles. Some great examples are Sticky Bandits, Wild Luchador and Big Bad Wolf Megaways, although the latter certainly gets its reputation from the original (with its RTP of 97.34%). Speaking of RTP, similar to No Limit City, Quickspin slots are more generous in terms of their bonus buy RTP (again, in relation to the RTP of the base game).

The games are generally more straightforward and so are the buy-in options. Simply purchase the free spins and off you go (a bit like BTG and Pragmatic)! There is generally nothing fancy here in terms of chance buy. Nevertheless, even with Quickspin games you can buy in at a high price. A bonus buy costs between 50x and 1600x your bet.

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Game Base Game RTP Bonus Buy RTP Volatility Buy-in (X Bet)
Azticons Chaos Clusters 96.26% 96.49% High 150x
Beastwood 96.11% 96.38% High 120x
Big Bad Wolf Megaways 96.05% 96.44% High 90x
Book of Duat 96.27% 96.50% - 96.91% High 150x - 1600x
Book of Inferno 96.15% 96.65% High 125x
Cabin Crashers 96.18% - 96.19% 96.49% - 96.52% High 75x
Cash Truck 96.00% 96.56% - 96.83% High 90x - 360x
Crown of Valor 96.16% 96.48% High 80x
Eastern Emeralds Megaways 96.04% 96.29% High 90x
Golden Glyph 2 96.09% 96.30% - 96.60% Medium-high 50x - 275x
Midas Coins 96.02% 96.56% Medium 50x
Mine & Melt 96.09% 96.35% - 96.59% High 60x - 330x
Primal Spirits 96.02% 96.53% High 150x
Raven Rising 96.07% 96.57% High 100x
Sakura Fortune II 96.03% 96.24% - 96.72% High 55x - 320x
Slugger Time 96.18% - 96.19% 96.49% - 96.52% High 75x
Sticky Bandits: Trail of Blood 96.23% 96.36% - 96.68% High 100x - 400x
Sticky Bandits 3: Most Wanted 95.82% 95.82% High 60x
Best bonus buy slot Tiger's Glory Ultra 96.51% and 96.71% (two game modes) 96.76% - 97.00% High 80x - 1000x
Wild Harlequin 96.27% 96.50% - 96.76% High 80x - 200x
Wild Luchador 96.00% 96.54% High 70x

Red Tiger

Red Tiger

Red Tiger bonus buy slots are a little monotonous. Not in terms of gameplay or design, but in terms of the return to player (RTP) rate. If you're specifically looking for the best bonus buy slots, Red Tiger doesn't come to mind with the exception of one title: Blood Suckers Megaways, and this one even positions itself closer to the 98% percent mark. Yes, Blood Suckers is a NetEnt slot and a good one at that, but in this case Red Tiger was commissioned to develop this title.

The good thing about the Red Tiger bonus buy slots is that they are also suitable for gamblers with a small bankroll. Some features can be activated with as little as 3x your bet. On the other hand, Blood Suckers Megaways, with a maximum feature drop buy of 1000x your bet, may be just the thing for high roller players.

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Game Base Game RTP Bonus Buy RTP Volatility Buy-in (X Bet)
Ancient Disco 95.74% 95.75% High 15x - 90x
Best bonus buy slot Blood Suckers Megaways 97.66% 97.68% Medium 10x - 1000x
Cake and Ice Cream 95.81% 95.72% Medium 10x - 75x
Happy Apples 95.70% 95.70% High 3x - 70x
Knights Of Avalon 95.69% 95.70% High 25x - 100x
Pinatas and Ponies 95.66% 95.74% High 5x - 80x
Red Hot BBQ 95.66% 95.75% High 5x - 70x
Sheep Gone Wild 95.72% 95.72% High 8x - 100x
Wolfkin 95.72% 95.72% Medium 10x - 80x
Wrigley's World 95.72% 95.71% High 70x

Relax Gaming

Relax Gaming

The developer Relax Gaming is a good choice if you are looking for slot machines to pay for a bonus. Many of the games reach the 97% RTP mark. In the case of the well-known Money Train slot series, it is even an astonishing 98% for the feature buy. Dead Man's Trail is another good one, but see for yourself in the list below.

To buy the free spins in Relax Gaming online slots, you have to spend between 50 and 100 times your bet. Money Train 3 makes an exception and offers the option to bet up to 500 times your stake.

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Game Base Game RTP Bonus Buy RTP Buy Chance RTP Volatility Buy-in (X Bet)
Banana Town 96.12% 96.16% - High 100x
Best bonus buy slot Beast Mode 96.32% 97.00% - High 80x
Chip Spin 96.36% 96.21% - 96.73% - High 70x - 90x
Best bonus buy slot Dead Man's Trail 96.29% 98.00% - High 100x
Best bonus buy slot Hazakura Ways 96.37% 97.00% - High 80x
Best bonus buy slot Helios' Fury 96.27% 97.00% - High 90x
Hellcatraz 96.30% - 96.83% 96.83% - High 200x
Holy Hand Grenade 96.45% 96.82% 96.64% High 95x
La Fiesta 96.19% 96.55% - Medium-high 50x
Best bonus buy slot Marching Legions 98.12% 97.13% - High 120x
Best bonus buy slot Money Train 96.20% 98.00% - High 80x
Best bonus buy slot Money Train 2 96.40% 98.00% - High 100x
Money Train 3 96.10% 96.50% - High 20x - 500x
Multiplier Odyssey 96.50% 96.50% - High 70x
Ramses Revenge 96.15% 96.15% - High 80x
Snake Arena 96.25% 96.25% - High 70x
TNT Tumble 96.11% 96.11% - Medium-high 70x
Top Dawgs 96.10% 96.71% - Medium-high 90x
Best bonus buy slot Volatile Vikings 96.23% 97.00% - High 100x
Best bonus buy slot Wild Chapo 96.36% 97.00% - Medium-high 60x
Wild Chapo 2 96.10% 96.50% - Medium-high 70x