‘Bonus Buy’ Casino Slot Games – Europe, 2023

If you’ve played slot games at online casinos, you’ve likely heard of “bonus buy slots” or “bonus feature buy” options. This relatively new play invention, introduced in 2017 by Big Time Gaming, has become popular among many slot players in Europe.

In this guide, we provide a list of some of the top bonus buy slots online, test them out and take you through the principles of this gambling feature, and also address the risks involved.

Different Types of Slot Games

See the 7 different types of online slot games below to compare features and gameplay mechanics first.

Popular Bonus Buy Slots in Europe

Slot GameReturn to PlayerSoftware ProviderBonus Buy PriceMax Win
Bison Battle96.41%Push Gaming75-95x50,000x
Big Bamboo96.13%Push Gaming99x50,000x
Buffalo King96.06%Pragmatic Play75x93,750x
Chaos Crew96.3%Hacksaw Gaming129x10,000x
Dead or Alive 296.82%Netent66x111,111x
Dead Mans Trail96.29%Relax Gaming50-250x50,000x
Dinopolis96.40%, 93.95%Push Gaming96.5x50,000x
Dog House Megaways96.55%Pragmatic Play100x12,305x
Fire Hopper96.38%Push Gaming124x50,000x
Fire in the Hole xBomb96.06%Nolimit City60-500x60,000x
Folsom Prison96.07%Nolimit City68-784x75,000x
Gates of Olympus96.50%Pragmatic Play100x5000x
Robin Hood’s Heroes96.05%Just For The Win53-119x5,000x
Infectious 596.81%Nolimit City75-555x55,555x
Misery Mining96.41%-96.69%Nolimit City66-439x70,000x
Money Train 296.40%Relax Gaming100x50,000x
Money Train 396.5%Relax Gaming20-500x100,000x
San Quentin xWays96.26%Nolimit City100-800x150,000x
Starburst XXXtreme96.26%NetEnt10-95xn/a
Sugar Rush96.50%Pragmatic Play100x5000x
Sweet Bonanza96.52%Pragmatic Play100x5000x
Tombstone RIP94.08% – 96.08%Nolimit City70-3000x300,000x
White Rabbit Megaways97.39%BTG100x17,420x

Image of slot bonus feature buy on popular game Money Train 3 by Relax Gaming, costing 30 EUR and 0.30 EUR per spin

Top 10 Bonus Buy Slots Online

We’ve picked the top 10 bonus buy slots from the table above based on their return to player (RTP), bonus buy prices, maximum win potential, and overall popularity. Check out our selection below.

1. White Rabbit

  • RTP: 97.39%
  • Provider: BTG
  • Bonus Buy Price: 100x
  • Max Win: 17,420x

2. Dead or Alive 2

  • RTP: 96.82%
  • Provider: Netent
  • Bonus Buy Price: 66x
  • Max Win: 111,111x

3. Infectious 5

  • RTP: 96.81%
  • Provider: Nolimit City
  • Bonus Buy Price: 75-555x
  • Max Win: 55,555x

4. Money Train 3

  • RTP: 96.5%
  • Provider: Relax Gaming
  • Bonus Buy Price: 20-500x
  • Max Win: 100,000x

5. Sweet Bonanza

  • RTP: 96.52%
  • Provider: Pragmatic Play
  • Bonus Buy Price: 100x
  • Max Win: 5,000x

6. Dog House Megaways

  • RTP: 96.55%
  • Provider: Pragmatic Play
  • Bonus Buy Price: 100x
  • Max Win: 12,305x

7. Gates of Olympus

  • RTP: 96.50%
  • Provider: Pragmatic Play
  • Bonus Buy Price: 100x
  • Max Win: 5,000x

8. San Quentin xWays

  • RTP: 96.26%
  • Provider: Nolimit City
  • Bonus Buy Price: 100-800x
  • Max Win: 150,000x

9. Money Train 2

  • RTP: 96.40%
  • Provider: Relax Gaming
  • Bonus Buy Price: 100x
  • Max Win: 50,000x

10. Fire Hopper

  • RTP: 96.38%
  • Provider: Push Gaming
  • Bonus Buy Price: 124x
  • Max Win: 50,000x

Buying 10 Slot Bonus Features: Our Experience

While playing at BC.Game, we decided to create a YouTube video and test bonus buys on the top 10 online slot games to see if they’re worth the money. We started with Big Time Gaming’s White Rabbit. You can watch it below.

Bonus Feature Costs and Total Winnings

Here at Onlinecasinoinfo.eu our goal was to see if buying the slot bonus features was a smarter idea than waiting for them to trigger naturally. We share our experiences with each slot game, including how much we spent on the bonus purchase and how much money we won. Below is the sequence of the 10 slots we played, along with our results.

No.Slot GameProviderFeature CostWin
1White RabbitBig Time Gaming€20€14.92
2Dead or Alive 2Netent€24€3.24
3Infectious 5Nolimit City€15€5.44
4Money Train 3Relax Gaming€30€12.30
5Sweet BonanzaPragmatic Play€20€5.39
6Dog House MegawaysPragmatic Play€20€13.76
7Gates of OlympusPragmatic Play€20€3.52
8San Quentin xWaysNolimit City€20€0.90
9Money Train 2Relax Gaming€20€4.40
10Fire HopperPush Gaming€24.89€4.48
  • Total spent on features: €214.89
  • Total won: €68.25

Best Casinos to Play Bonus Buy Slot Games

You may be wondering why we consider these online casinos to be the best for bonus buy slots. The reason is simple and convincing – they offer high RTP slots and fast payouts. Time matters today, and real money players shouldn’t waste it on casinos with low daily, weekly, or monthly withdrawal limits.

When we hit that big win in a slot feature buy game, we want to access the winnings as fast as possible, and the following European online casino sites provide just that. Bitstarz has an average payout time of 10 minutes with no cashout limits, while BC.Game Casino pays out in cryptocurrency within 10 minutes and also has no cashout limits. Winz processes payments within an hour but has a 400,000 EUR monthly withdrawal limit.

Bitstarz Casino Logo

Bitstarz Casino

⭐ Rating: 4.8/5

  • Multi-award casino
  • Super-fast withdrawals (10 min)
  • 3800 casino slots and games
  • Offers a high-roller bonus
  • Cryptocurrencies & fiat accepted

Bonus: up to €100 + 180 Free Spins (wagering: 40 × Bonus)

Visit Bitstarz Casino ➟

BC.Game Casino Logo


⭐ Rating: 4.6/5

  • Leading crypto casino globally
  • 8000+ casino games to play
  • Fast withdrawals with no limits
  • 9 live casino game providers
  • High RTP slots

Bonus: up to 270% 1st deposit match bonus

Visit BC.Game Casino ➟

Winz Casino Logo

Winz Casino

⭐ Rating: 4.8/5

  • Best payout casino slots (RTP)
  • More than 5000 games to play
  • High cashout limits (€400K)
  • 20% unlimited VIP cashback
  • Cryptocurrencies & fiat accepted

Bonus: One ‘Wheel of Winz’ spin (no wagering)

Visit Winz Casino ➟

How to Choose the Best Bonus Buy Slots

When selecting a bonus buy slot game for playing, taking into account a few aspects can be helpful.

RTP Rates (Return to Player)

The RTP rate is a key factor to consider when choosing a bonus buy slot. It represents the percentage of stakes that a game will return to the player over an extended period of play. Generally, a higher RTP means a better chance of receiving a return on your bonus feature payment. Look for games with an RTP of 96% +. These online casino slots tend to offer more frequent payouts.

Slot Volatility Level

The volatility level is another aspect when selecting a bonus buy slot game to play. It determines the frequency and size of payouts you can expect. High volatility online slot machines offer larger payouts but less frequently. Low volatility slots provide smaller but more frequent payouts.

Depending on your playing style and risk appetite, choose a slot game with a volatility level that suits your usual playing style and risk tolerance.

The Bonus Buy Feature Cost

The cost of the bonus feature varies between games and software providers, as shown on our bonus buy slots table, and typically starts at around 100x your bet. Ensure that you are comfortable with the bonus buy cost before starting the game, as it can significantly impact your bankroll.

Check the game’s paytable and consider the potential winnings offered by the bonus game round to determine if the cost is justified.

Potential Payouts

Understanding the maximum slot win potential is highly important. Some of the top video slots in Europe, like Dead or Alive 2, offer massive payouts, reaching over 100,000x your bet or feature round, and others have more modest 5000x winning potential.

Keep in mind that high win potential, as a rule, comes with high risk and higher volatility, so play slots that balance potential payouts with your risk tolerance.

Game Theme, Sound and Design

The slot’s theme, sound, background music and design can also impact your enjoyment while playing. Choose a slot game with an appealing theme and non-annoying sound effects, as these elements can enhance your gaming experience. Some popular online slot machine themes include mythology, adventure, branded and Egyptian, among others.

Look for games from reputable European igaming software developers; they tend to deliver high-quality gameplay.

Special Game Features

Apart from the bonus buy option, consider in-base game features like cascading reels, ‘Cluster Pays’, and expanding or sticky wilds with multipliers. The more and better quality features a game has, the more interesting and potentially rewarding gameplay can be.

Pros and Cons of Bonus or Feature Buy Slots

The feature buy slots games have rapidly gained popularity across Europe, providing unique gameplay to online casino patrons while also presenting some challenges that you should be aware of. Let’s dive into the main pros and cons of bonus buy features from a slots gambler’s perspective.

Pros: Instant Access to Bonus Rounds

One of the most enticing aspects of bonus buy slots is the ability to skip right past the base game and jump directly into the bonus round. This option suits players with limited time or those who prefer a quick gamble. It simply eliminates the wait and anticipation for 3 or 4 scatter symbols triggering bonus features during regular play.

Consequently, you can get to the most lucrative part of the game instantly for a predetermined fee.

Cons: High Costs

The price to purchase a slot bonus feature comes at around 100x your wager, as mentioned above, which can rapidly drain your bankroll if not managed carefully. Consequently, the higher feature costs can make it less appealing to players with limited funds or those who simply prefer low-rolling or lower-risk gaming.

Cons: Heightened Volatility

Bonus buy online slots are often characterized by high volatility, meaning that the frequency and magnitude of payouts can be erratic. While high volatility can result in massive winnings, it also raises the risk of losing your entire real money balance.

Slot gamblers who favor regular 100x payouts may find the increased volatility of bonus feature buy less desirable.

Legal Restrictions in Certain Jurisdictions

In some jurisdictions like the UK, bonus buy slots are not allowed due to concerns about their potential impact on problem gambling. However, many UK online gamblers express frustration with UK regulations that have banned bonus buys, as they believe this has negatively impacted their online casino game play

Answers to FAQs on Feature Buy Slots

What are bonus buy slots, exactly?
When you play the feature buy slots, you’re gambling using their built-in feature that enables you to directly purchase access to free spin bonus rounds. This way, you skip waiting for the right number or combination of scatter symbols in the base game.
How do bonus buy features work?
With bonus buy, you’ll pay a predetermined cost—usually between 50x and 150x your bet—to immediately trigger the game bonus round or free spins feature of 3, 5, 8, 10 or 15 spins, depending on the game. This allows you to bypass the need for landing the necessary 3 or 4 scatter symbols on the reels during the base game.
When was the bonus buy feature introduced?
The bonus buy feature made its debut in 2017 with White Rabbit, a game released by Big Time Gaming.
Does the bonus buy feature work with active casino bonuses?
To be sure, contact your casino’s live chat directly. However, typically, most European online casinos prohibit players from using their bonus balance to purchase the feature bonus rounds, as stated in the terms and conditions.
How to choose the perfect feature buy slot game for playing?
When picking a bonus buy slot, think about factors such as the RTP rate, volatility, bonus buy cost, possible payouts, game theme and design, unique features, and player reviews on gambling forums like Casinomeister.com. This will help ensure you have the best playing experience.
Is feature buy more costly than playing slots as normal?
Using our video as an example, we spent €214.89 on 10 features and only won back €68.25. While this could be attributed to bad luck, we believe that if we had played slots in a traditional way at €1 per spin, we might have had better chances of doubling our money (€214.89).
Where can you play bonus buy slots for free?
You can test bonus buy slots and how their features work for free using demo versions available on any European online casinos listed above as well as official game developer websites.
How to tell if a slot feature buy is worth the cost?
To figure out if it’s worth the cost, take into account factors like the game’s RTP, volatility, possible payouts, and the overall enjoyment you gain from the game’s extra features.
What’s the link between feature buy slots and volatility?
Most online slots with integrated bonus game feature buy options exhibit high volatility, meaning that the frequency and size of payouts can be unpredictable. High volatility can lead to significant winnings, but it also increases the risk of losing your casino account balance quickly.
How to find the best bonus buy slots?
To discover the best feature buy slots to play, consider factors such as RTP rate, volatility, potential payouts, and special features (number of free spins and types of wild symbols). Also, try demo versions of the games to see which ones suit your playing style.