Bonus Feature Buy Slots

RTP: 96%
Volatility: Unknown
Released: 2023
Provider: Endorphina
RTP: 96%
Volatility: Unknown
Released: 2023
Provider: Endorphina
RTP: 96%
Volatility: Unknown
Released: 2023
Provider: Endorphina
RTP: 96.09%
Volatility: High
Max Win: 8,208x
Released: 2023
Provider: PoggiPlay
RTP: 96%
Volatility: Medium
Max Win: 8,000x
Released: 2023
Provider: PoggiPlay
RTP: 96.60%
Volatility: Low - Medium
Max Win: 5,000x
Released: 2021
Provider: Tada Gaming
RTP: 97.04%
Volatility: Low - Medium
Max Win: 500x
Released: 2022
Provider: Tada Gaming
RTP: 96.97%
Volatility: Medium
Max Win: 2,000x
Released: 2022
Provider: Tada Gaming
RTP: 96.44%
Volatility: High
Max Win: 47,200x
Released: 2018
Provider: Big Time Gaming
RTP: 96.05%
Volatility: Low
Max Win: 6,666x
Released: 2020
Provider: NetEnt
RTP: 96% | 94.01%
Volatility: High
Max Win: 2,700x
Released: 2023
Provider: NetEnt
RTP: 88.04% - 96.05%
Volatility: Low
Max Win: 533x
Released: 2023
Provider: NetEnt
RTP: 88.01% - 96.07%
Volatility: Medium - High
Max Win: 973x
Released: 2023
Provider: NetEnt
RTP: 96.5%
Volatility: Medium - High
Max Win: 14,700x
Released: 2019
Provider: Big Time Gaming
RTP: 96.2%
Volatility: Medium - High
Max Win: 25,000x
Released: 2020
Provider: Iron Dog Studio
RTP: 96.59% - 97.42%
Volatility: High
Max Win: 26,000x
Released: 2019
Provider: Kalamba Games feat Relax Gaming
RTP: 97.66% to 97.73%
Volatility: Very high
Max Win: 20,521x
Released: 2023
Provider: Red Tiger Gaming
RTP: 96.2%
Volatility: High
Max Win: 45,000x
Released: 2020
Provider: Iron Dog Studio
RTP: 96.02% to 96.03%
Volatility: High
Max Win: 13,950x
Released: 2020
Provider: Nolimit City
RTP: 96.5%
Volatility: Medium to High
Max Win: 504x
Released: 2018
Provider: Blueprint Gaming
RTP: 96.28%
Volatility: High
Max Win: 50,000x (capped)
Released: 2019
Provider: NextGen Gaming
RTP: 96.55%
Volatility: High
Max Win: 50,000x
Released: 2020
Provider: Blueprint Gaming
RTP: 96.52%
Volatility: Medium to High
Max Win: 10,000x
Released: 2018
Provider: Blueprint Gaming
RTP: 94%
Volatility: High
Max Win: 50,000x
Released: 2023
Provider: Elk Studios
RTP: 96.35%
Volatility: High
Max Win: Up to 10,000x
Released: 2021
Provider: Slotmill
RTP: 96.08%
Volatility: Medium
Max Win: 10,000x
Released: 2021
Provider: Slotmill
RTP: 96.27%
Volatility: High
Max Win: 10,000x
Released: 2021
Provider: Slotmill
RTP: 96.16%
Volatility: High
Max Win: 7,500x
Released: 2021
Provider: Slotmill
RTP: 96.14% - 96.22%
Volatility: Medium to high
Max Win: 5,000x
Released: 2022
Provider: Slotmill
RTP: 96.21%
Volatility: High
Max Win: 20,000x
Released: 2022
Provider: Slotmill
RTP: 95.09%
Volatility: High
Max Win: 20,000x
Released: 2022
Provider: Slotmill
RTP: 96.08%
Volatility: High
Max Win: 12,000x
Released: 2022
Provider: Slotmill
RTP: 96.10%
Volatility: High
Max Win: 10,000x
Released: 2022
Provider: Slotmill
RTP: 96.18%
Volatility: High
Max Win: 15,000x
Released: 2022
Provider: Slotmill
RTP: 94.36% or 96.12%
Volatility: High
Max Win: 10,000x
Released: 2022
Provider: Slotmill
RTP: 96.19% to 96.53%
Volatility: High
Max Win: 6000x
Released: 2022
Provider: Slotmill
RTP: 96.14%
Volatility: High
Max Win: 9,797x
Released: 2020
Provider: Nolimit City
RTP: 96.40%
Volatility: High
Max Win: 17,874x
Released: 2022
Provider: Yggdrasil
RTP: 95%
Volatility: Medium to high
Max Win: 10,000x
Released: 2022
Provider: Elk Studios
RTP:96%
Volatility: Medium to high
Max Win: 25,000x
Released: 2021
Provider: Yggdrasil
RTP: 96.83%
Volatility: High
Max Win: 20,000x
Released: 2018
Provider: Push Gaming
RTP: 96.02%
Volatility: Medium
Max Win: 12,683x
Released: 2020
Provider: Nolimit City
RTP: 96.55%
Volatility: High
Max Win: 12,305x
Released: 2020
Provider: Pragmatic Play
RTP: 96.21%
Volatility: Medium
Max Win: 922x
Released: 2021
Provider: BetSoft
RTP: 95%
Volatility: High
Max Win: 10,000x
Released: 2021
Provider: Elk Studios
RTP: 95%
Volatility: Medium to high
Max Win: 50,000x
Released: 2022
Provider: Elk Studios
RTP: 97%
Volatility: High
Max Win: 10000x
Released: 2023
Provider: Tada Gaming
RTP: 96.06%
Volatility: Very high
Max Win: 60,000x
Released: 2021
Provider: Nolimit City

Let’s discuss bonus buy slots – what they are and what are the best games out there. Whether you’re a seasoned player or new to the world of online slots, this article is for you.

What is a Bonus Buy Slot?

Bonus Buy Slots are a popular trend in the online gambling world that allows players to purchase bonus features in slot games. This means that instead of waiting for the bonus round to trigger randomly, players can choose to activate it by paying an extra fee.

This type of slot game offers a unique twist on traditional slots and provides players with a more interactive and fast-paced gambling experience.

Top Bonus Buy Online Slots of All Time

White Rabbit MegaWays (BTG)

white-rabbit-megaways-slot

The first slot ever to feature a bonus buy – White Rabbit MegaWays by Big Time Gaming is a 5 reel slot with up to 248,832 ways to win, high volatility, and an RTP of up to 97.24%.

This Alice in Wonderland-themed game is packed with 4 bonus features:

  • Caterpillar Wilds: A snoozing caterpillar wakes up, takes a puff of his hookah pipe, and blows up to 12 smoke rings. Each ring that lands on the reels adds up to 4 bonus Wilds with 2x or 3x multipliers, which also multiply each other!
  • Down the Rabbit Hole Free Spins: The White Rabbit, which is the Scatter symbol, lands on reels 2, 3, and 4 in one spin to activate this Free Spins feature. It offers 15 Free Spins to be used in new reels.
  • Extending Reels: The Cupcake symbol lands to be substituted with 2 new symbols. Each symbol increases by +1. The feature is retriggered once the reel reaches the height of 12 symbols. This results in 3 to 12 Free Spins. This feature can be retriggered up to 5 times and has the potential for up to 75 Free Spins. White Rabbit MegaWays offers up to 248,832 ways. Imagine if each reel were to reach its full potential!
  • Queen’s Reel: When a reel in the slot reached its maximum capacity of 12 symbols, the Queen’s Reel comes into play. This upgraded reel offers an additional Wild and Red Queens.

The bonus buy feature of White Rabbit MegaWays slot is known as Feature Drop. It lets you buy your way into the Free Spins round when you pay up 100x your stake.

However, the price reduces when the Feature Drop Gold Coins appear on the reels. The deductions are of 2, 1, 0.5, 0.4, 0.3, and 0.2 credits, and can even go down to zero if you play the slot long enough.

The RTP of BTG’s White Rabbit MegaWays in the base game is 95%, which shoots up to 97.24% with the bonus buy feature. The max win is 17,420x your stake!

Read full review

Extra Chilli MegaWays (BTG)

Extra Chilli

Another BTG slot to feature the MegaWays random reel modifier along with bonus buy is Extra Chilli. The game comes with 6 reels, 117,649 ways to win, and an extra row of 4 symbols. It is a highly volatile slot with an RTP that ranges between 96.15% to 96. 82%.

Extra Chilli MegaWays is packed with 4 Free Spins bonus features:

  • Reactions: Also known as the Avalanche or Cascading mechanism, it removes the symbols from a winning combo to make way for new symbols and potentially, another win. The extra row of 4 symbols comes into play during Reactions. Each Reaction is accompanied by free re-spins until there are no more winning combinations.
  • Free Spins Gamble: Landing 3 H.O.T Gold letter symbols activates the Free Spins feature, where players receive 8 Free Spins. An extra H.O.T symbol brings another 4 Free Spins. And then, you can win up to 24 more with the Free Spins Gamble feature by spinning the gamble wheel. The odds are 50/50.
  • Unlimited Win Multiplier: Free Spins in Extra Chilli MegaWays come with the Unlimited Win Multiplier, which starts at 1x and increases by +1 after every successful Reaction. There’s no cap on how high the multiplier can reach!
  • Bowls of Chilli: They are Scatters that appear in the extra row of 4 symbols. Landing 3 or 4 of these bowls of chilies triggers 4 or 8 Free Spins.

If you can’t wait to activate the Free Spins, Extra Chilli MegaWays offers a bonus buy feature called the Feature Drop, which gives you direct access to the Free Spins round for 50x your stake! But remember that this feature will be available only if the casino supports it.

The RTP in the base game is 96.15% which slightly increases to 96. 82% with the Feature Drop. The max win in Extra Chilli MegaWays is 20,000x your stake!

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Dead or Alive 2 (NetEnt)

dead or alive 2

Dead or Alive 2 follows the footsteps of the iconic NetEnt slot Dead or Alive, but with a twist: it comes with a feature buy! This 5 reel, 9 payline slot comes with low to medium variance and an above-average RTP of 96.82%.

The game is packed with 3 bonus features:

  • Train Heist: This is the low-volatility option where Wild symbols landing on the reels cause the multiplier of the game to increase by +1 and trigger Free Spins. The Train Heist feature has the potential to push the multiplier to x16, which would further trigger 5 additional Free Spins.
  • Old Saloon: This is the medium-volatility option retained from the original game. Winnings are increased by an x2 multiplier with which, players stand a chance to win bigger payouts. Also, the Wilds are sticky in this feature, which raises the chance of one landing on all 5 reels. When this happens, it triggers 5 extra Free Spins.
  • High Noon Saloon: This is the high-volatility option, which has the potential for huge payouts. In this feature, 2 Wilds landing on the same reel turn into an x2 multiplier, and 3 Wilds turn into an x3 multiplier. They also multiply each other to award an x6 multiplier if any of them contribute toward the same win.

Fire up the Free Spins bonuses by spending 600 coins on the Feature Buy option and guarantee yourself Scatters on reels 1, 2, and 3. This will further increase your chance of landing 5 Scatters in the base game for a guaranteed win of 2,500x your stake!

Please note that the RTP in Dead or Alive 2 doesn’t change even when you make your entry into the bonus round. The max win in NetEnt’s Dead or Alive 2 is 100,000x your stake!

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Money Train 1, 2, and 3 (Relax Gaming)

money-train-slot

Relax Gaming’s legendary Money Train slot series needs no introduction to slot players. Based on the Wild West and heist theme, each is a bonus buy slot worth spinning!

The original Money Train slot is a 5 reel, 40 payline game with high volatility and 96.20% to 98% RTP. It comes with the Money Cart Bonus round, which is triggered when bonus symbols appear on reels 1, 3, and 5.

The game then shifts to a different train where the configuration of the reels is different with positions for 20 separate symbols. Every time a new symbol hits one of these positions, a spin count of 3 needed for the bonus round is reset.

As long as new symbols keep appearing on these new reels during the 3 spins, the bonus remains active. Each symbol has a discrete role:

  • Money Safe reveals an xbet value.
  • Payer reveals an xbet value and adds it to the visible symbols on the reels.
  • Persistent Payer reveals an xbet value and adds it to the visible symbols on the reels for that spin and the upcoming spins.
  • Widener reveals an xbet value and opens an extra reel.
  • Collector reveals an xbet value and collects all visible values on the reels to add them to its own value.
  • Persistent Collector reveals an xbet value and collects all visible values on the reels to add them to its own value for that spin and the upcoming spins. This symbol does not collect its own value.
  • Tumbleweed does not carry a value and does not reset the spin counter.

You can switch to Money Train’s Buy Feature option to enter the bonus round for 80x your stake. This will shoot the RTP from 96.20% to 98%! The max win potential is 20,000x your stake!

Money Train 2 also features 5 reels and 40 paylines. This high-volatility game has an RTP of up to 98%. It, too, is packed with the Money Cart Bonus round, which kickstarts when you land 3 or more Scatters. An additional Respins feature gets triggered when two bonus symbols land on the reels.

With the buy function, you can enter the Money Cart Bonus round for the price of 100x your stake! The base game has an RTP of 96.40%, which riches 98% with the buy bonus option. The grand prize in Relax Gaming’s Money Train 2 is 50,000x your stake!

Last in the series is Money Train 3, which is a 5 reel, 40 payline slot with high volatility and an RTP of up to 96.5%. This slot, too, comes with the Respins feature and the Money Cart Bonus round with a few tweaks in the symbols.

The game’s Buy Feature options are interesting:

  • 1 Spin Feature triggers the bonus round with 1 starting spin. New symbols reset the spin counter to 1. You can buy this feature for the price of 20x your bet.
  • 2 Spin Feature triggers the bonus round with 2 starting spins. New symbols reset the spin counter to 2. You can buy this feature for the price of 50x your bet.
  • Original Feature triggers the bonus round with 3 starting spins. New symbols reset the spin counter to 3. You can buy this feature for the price of 100x your bet.
  • Persistent Feature triggers the bonus round with 1 Persistent symbol. New symbols reset the spin counter to 3. You can buy this feature for the price of 500x your bet.

The RTP in the base game is 96.1%, which goes up slightly to 96.5% when you buy the bonus feature. Relax Gaming’s Money Train 3 has a max win potential of 100,000x your stake!

Jammin’ Jars 1 and 2 (Push Gaming)

Jammin’ Jars slots

Push Gaming’s Jammin’ Jars features 8 reels and Cluster Pays. It is a highly volatile slot that offers an RTP of 96.83%. This fruit-themed slot comes packed with the following bonus features:

  • Rainbow: It is randomly activated after a no-win spin. A rainbow lands on the reels leaving a large fruit behind to form a winning cluster with its adjacent matching symbols.
  • Free Spins: Landing 3 or more Jam Jar Wilds in one spin triggers a random number of Free Spins.

With the bonus buy feature of this slot, you can enter the Free Spins round. The price for 3 Jam Jar Wilds is 100x and that for 4 Jam Jar Wilds is 200x your stake! The RTP becomes better in the Free Spins round so buying your way into it is totally worth it! The max win potential is 20,000x your stake!

Read full review of Jammin’ Jars

Nitropolis 2, 3, and 4 (Elk Studios)

Nitropolis 2 slot

Elk Studio’s steller series Nitropolis comes with 4 online slots. Of them, 3 games – Nitropolis 2, 3, and 4 offer the feature buy option.

Nitropolis 2 is a 6 reel game with up to 191,102,976 paylines! Its RTP is 95% and volatility high. This online slot brings with it the following features:

  • Wilds: They replace symbols that can create a winning combination to enhance existing wins or save a losing round.
  • Nitro Reels: They cover 2 symbol tiles and contain 4, 6, 8, 10, or 12 paying symbols. Nitro Reels are the wildcard of Nitropolis 2 slot. They land randomly in the base game as well as the Free Spins round to boost paylines.
  • Scatters: They are represented by Hot Rod symbols and land on 3, 4, 5, or 6 reels to unlock 10, 15, 20, or 25 Free Spins.
  • Free Spins: 3 or more Scatters trigger the Free Spins bonus round. Activated Nitro Reels remain sticky during this game, which can be retriggered.
  • Nitro Booster: It is a reel modifier that adds features to the main reels. Green Nitro Boosters impact the Nitro Reels of the same column and Gold Nitro Boosters impact all Nitro Reels. Nitro Boosters in Nitropolis 2 bring about 8 different kinds of reel modifiers, which are as follows:
    • Nitro Wild – Wilds on Nitro Reels
    • All Premium – High-paying symbols on Nitro Reels
    • Nitro Upgrade – Additional symbols on Nitro Reels
    • Nitro Match – A symbol matched on the left reel of Nitro Reels
    • Re-spin – Nitro Reels locked in with remaining symbols re-spining.
    • Pay Both Ways – paylines working in both ways

Nitropolis 2 slot has its feature buy option termed X-iter. It lets players choose from 5 predefined game modes and pick their favorite scenario over and over again.

  • 100% Trophy Guaranteed Winning Spin: For 5x your bet, you can purchase a spin with a guarantee of winning something.
  • Max Nitro Booster: For 25x your bet, you get 3 spins that guarantee the feature or bonus symbols landing on every position of the Nitro Reels.
  • Buy Bonus: For 100x your bet, you get a spin with 3 Scatters.
  • Big Bonus: For 200x your bet, you get a spin with 4 Scatters.
  • Super Bonus: For 500x your bet, you get the Super Bonus, which gives you Free Spins with 12 Nitro Reels per spin.

Elk Studio’s Nitropolis 2 has a maximum win potential of 10,000x your bet. However, the RTP remains the same even with the bonus buy feature.

Nitropolis 3 has a similar layout with 6 reels, but offers up to 1000,000 paylines, which is lower than the previous version. The bonus features are the same. Its volatility ranges from medium to high while its RTP is a fixed 95% with or without the X-iter feature. The max win is 50,000x your stake.

Nitropolis 4 is the new kid on the block, but as they say, the apple doesn’t fall far from the tree. This slot, too, comes with 6 reels, but offers up to 46656 paylines, which is even lower than what it was before in the earlier versions.

Moreover, the slot’s RTP has been lowered to 94%, which is a disappointment given the already low RTP in the previous version. To add to that, the RTP doesn’t change in the Free Spins round whether you trigger it organically or buy your entry into it using the X-iter feature. The maximum win potential is 50,000x your bet.

Space Wars 2: Powerpoints (NetEnt)

space wars 2 slot

NetEnt’s Space Wars 2: Powerpoints is a highly volatile online slot with an RTP of 96.05%. It means, on average, the game pays out $96.05 for every $100 you bet for a period of time.

This 6 reel space-themed slot with ClusterPays comes with the following bonus features:

  • Powerpoints: They are generated whenever winning combinations occur. They are added to a Power meter, which helps players level up and increase the win multiplier of the slot.
  • Column and Row Blaster: Whenever 4-symbol horizontal winning lines are scored in the base game or bonus game, a Column Blaster symbol lands to remove all symbols except Wilds and Feature symbols from the corresponding row and add Powerpoints to the Power meter. Similarly, a Row Blaster works when 4-symbol vertical wins are scored. It removes all symbols except Wilds and Feature symbols from the corresponding column and adds Powerpoints.
  • Zapper: Whenever a 5 or 6 symbol winning line in the base game occurs, it generates a tile called Zapper that removes 1 to 4 symbol types if triggered by a 5-symbol match, or 3 to 4 symbol types if triggered by a 6-symbol match. In the Free Spins round, Zappers are generated when 5, 5, 6, or 8 symbol winning lines happen.
  • Bomb: Whenever a win with a vertical or horizontal matching symbol is hit, a Bomb symbol is added to the game grid. Once the wins are paid out, the Bomb explodes to remove itself and all symbols around it. This, in turn, adds Powerpoints to the Power meter. Should a Bomb explosion remove a Multiplier Wild, the number of awarded Powerpoints are multiplied as well.
  • Wild + Multiplier Wild: When a 3-symbol match in the base or bonus game happens, a Wild symbol is positioned in one of the empty spaces. In the Free Spins round, these Wilds might carry multipliers of 2x, 3x, 4x, 5x, 10x, or 25x value. If a winning line occurs in this round, the awarded Powerpoints are multiplied.
  • Combos: If Column/Row Blasters, Bombs, and Zappers happen to be adjacent to each other, their power increases as follows:
    • Combo 1: A Bomb is positioned next to a Column/Row Blaster, which, when triggered, removes 3 reels of symbols except for Wilds and Feature symbols (in case of a Column Blaster) or 3 rows of symbols except for Wilds and Feature symbols (in case of a Row Blaster).
    • Combo 2: A Bomb is positioned next to a Zapper, which, when triggered, causes 1 to 3 symbol types to change into Bombs and Zapper, after which the Bombs explode.
    • Combo 3: A Zapper is positioned next to a Column/Row Blaster, which, when triggered, transforms 1 to 3 symbol types into Column/Row Blasters.
  • Free Spins: Collect 1000 Powerpoints to trigger the Free Spins bonus round where the grid expands to 8 rows and offers additional Free Spins.

In NetEnt’s Space Wars 2: Powerpoints, players can buy their entry into the Free Spins round for a price of 75x, 140x, or 250x their bet, which offers 8, 12, or 16 Free Spins. Please note that the RTP of 96.05% remains fixed whether you buy the Free Spins on not. Max win is 10,200x your stake.

Read full review

The Dog House MegaWays (Pragmatic Play)

the dog house megaways slot

The Dog House MegaWays is one of Pragmatic Play’s most celebrated MegaWays titles. This 6 reel slot offers 117,649 ways to win. It is a highly volatile canine-themed game with a higher-than-average RTP of 96.55%, which means it pays out $96.55 for every $100 you bet in the long run.

The game is filled with the following bonuses and features:

  • Wild: Kennels represent Wilds in the game, which can replace regular symbols to form winning lines. Wilds may or may not come with a 2x or 3x multiplier attached to them.
  • Free Spins: Scatters are represented by dog paws, hitting 3 or more of which triggers two different Free Spins rounds. You can choose only one of them:
    • Sticky Wilds:
      • 3 Scatters award 7 additional spins and 2-7 Sticky Wilds on each reel.
      • 4 Scatters award 12 additional spins and 2-7 Sticky Wilds on each reel.
      • 5 Scatters award 15 additional spins and 2-7 Sticky Wilds on each reel.
      • 6 Scatters award 20 additional spins and 3-7 Sticky Wilds on each reel.
    • Raining Wilds:
      • 3 Scatters award 15 additional spins and up to 6 Raining Wilds on each spin.
      • 4 Scatters award 18 additional spins and up to 6 Raining Wilds on each spin.
      • 5 Scatters award 25 additional spins and up to 6 Raining Wilds on each spin.
      • 6 Scatters award 30 additional spins and up to 6 Raining Wilds on each spin.
  • Multipliers: All Sticky Wilds can carry a random multiplier of up to 3x, which remains locked in to the reels. Also, all Raining Wilds can carry a random multiplier of 1x to 3x value.

If you don’t fancy grinding your way to the Free Spins, The Dog House MegaWays offers the option to buy your way into them instead. Use the ‘Buy Free Spins’ button available in the slot and cough up 100x to guarantee activation of the bonus round in the next spin.

However, note that getting to the Free Spins round has zero effect on the RTP, which remains fixed at 96.55%. The max win potential in The Dog House MegaWays is 12,305x your stake.

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Let it Slide (Yggdrasil Gaming)

let it slide slots

Yggdrasil Gaming’s Let it Slide is one of the best bonus buy slots out there. This 6 reel game with 20 paylines is highly volatile and offers an above-average RTP of 96.40%. It means, for every $100 you stake, you’ll get back $96.40.

The game comes packed with 3 bonus features:

  • Let it Slide: Stacked Wilds in the game represented by trees full of acorns and covering 3 positions on the board land on reels 1 and 6, triggering the Let It Slide feature. This, in turn, triggers Free Respins, which bring along a Sliding Wild that moves to the opposite side of the screen in each respin.
  • Frozen Frames: A Sliding Wild passes through special Ice Frames, which turn into Sticky Wilds. Once the Sliding Wild has arrived, it can bounce indefinitely to offer more Respins, meanwhile also increasing its win multiplier.
  • Free Spins: 2 fully visible Stacked Wilds trigger the Free Spins round where more Ice Frames turn into Sticky Wilds. There’s no cap on the number of Free Spins.

Let it Slide slot game offers the Bonus Buy option for 57x your stake, which gets you right into the Free Spins round. However, doing so decreases the theoretical RTP to 95.10%, which can be a letdown. The max win potential of the game is 17,874x your stake.

Read full review

Taco Brothers Derailed (Elk Studios)

taco-brothers-derailed-slot

Another gem from Elk Studios, Tac Brothers Derailed is a 5 reel slot with 466 paylines. This game is medium to highly volatile and offers an RTP of 95%, which means, you’d get $95 for every $100 you bet in the long run.

This Mexican Gold Rush-themed game offers the following bonus features:

  • Walking Wilds: All Taco Brother bonus symbols can appear as Walking Wilds to trigger Walking Wilds for respins.
  • Walking Multiplier Wilds: These are Walking Wilds that come with a 5x multiplier and appear only on the top row.
  • Taco Train Heist: Landing 3 Taco Brothers bonus symbols trigger the Taco Train Heist bonus round. Here, Walking Wilds will appear inside a train carriage to offer respins and turn the corresponding Taco Brothers symbols into Wilds. Captain Diaz on the reels imprisons a Walking Wild while Senorita unlocks it or pulls it back to reel 6 to offer more respins. Captain Diaz and Senorita appearing on the same respin leads to the latter blocking the former from the Walking Wild and transforming him into a Wild.
  • Taco Smash N’ Grab: Landing 4 Taco Brothers bonus symbols triggers the Taco Smash N’ Grab bonus round. Here, Walking Wilds and Walking Multiplier Wilds move simultaneously and eventually spin out on reel 1. Captain Diaz is the Wild and cannot imprison any Walking Wild. Senorita, however, can pull back Walking Wilds to reel 6 for more respins, which continue until all Walking Wilds are gone from the reels.

Elk Studios’ X-iter is the feature buy of this slot. It offers these 5 options:

  • Bonus Hunt: 2x your stake doubles the chance to trigger the bonus round.
  • Walking Wild Taco Brother: 10x your stake guarantees Walking Wilds.
  • Walking Multiplier Wild: 25x your stake guarantees Walking Multiplier Wilds.
  • Bonus: 100x your stake triggers the bonus game.
  • Super Bonus: 500x your stake triggers Taco Smash N’ Grab.

The RTP of the game, however, does not budge from 95% – whether you use the bonus buy or not. The maximum you can win off a spin in Elk Studios’ Tac Brothers Derailed is 10,000x your stake.

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Bonus Bunnies (Nolimit City)

bonus-bunnies-slot

Bonus Bunnies by Nolimit City is an online slot with 4 reels and 30 paylines, although it looks more like a Cluster Pays game. It is a medium-volatility game with an above-average RTP of 96.14%, which means players get back $96.14 for every $100 they stake in theory.

The slot comes with the following bonus features:

  • Wild Expansion: A bonus symbol appearing in the presence of a Wild on the reels triggers this bonus round where the Wild expands vertically across the reels. In the presence of two or more bonus symbols triggering the feature, the Wilds expand vertically as well as horizontally.
  • Carrot Link Spins: Landing 3 bonus symbols triggers the Carrot Link Spins round, which is similar to the re-spin bonus in Narcos and Money Train. Please do not mistake this for a Free Spins round. It starts with 3 lives and turns all symbols triggering it into carrots with attached multipliers. The more you spin, the more carrots you get. Rounds without carrots steal a life. New carrots reset the lives to 3. The round also sees 3 bonus bunnies offering these special treats:
    • Harvester: collects multipliers and adds their total value to the current multiplier
    • Fertilizer: adds new multiplier to all wins
    • Settler: makes way for additional spins by adding a row to the current bonus screen
  • Golden Key: Fill the entire grid on the bonus reels and you’ll unlock the Golden Key, which in turn, unlocks a chest with a multiplier of 2x, 3x, 4x, or 5x your stake’s value.

To bypass the tedious base game, use the bonus buy feature of Nolimit City’s Bonus Bunnies slot and access the Carrot Link Spins round directly for 60x your stake.

The default RTP of 96.14% gets a boost of up to 96.43% in the bonus round, which is why choosing to buy your entry into it can be a good idea. The game has the potential to pay out a max win of 6950x your stake.

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Stay Frosty (Betsoft)

stay frosty slot

Betsoft’s Stay Frosty is a 5 reel online slot with 100 paylines. The volatility of the game is medium and it offers an RTP of 96.21%, which is higher than the average. It means, theoretically, the slot game pays back 96.21% of your total wager or $96.21 per $100 you stake.

Stay Frosty has the following bonus features in it:

  • Stay Wild!: They can land on reels 2, 3, and 4 to replace regular symbols and form winning combinations. If a Stay Wild appears on the winning payline, it remains sticky for 2 spins. If a sticky Wild is able to form a new win, its remaining sticky spins counter doesn’t increase.
  • Merry Reindeer: Landing 3 or more Reindeer Scatters triggers this round. You can win 10, 15, or 20 Free Spins when you land 3, 4, or 5 Scatters. The round also awards you with Scatter wins of 5, 10, or 50x your stake. Wilds that are part of winning combinations remain sticky throughout this Free Spins round.

If you can’t wait to trigger the Free Spins bonus round, use the Buy feature of the game to access it directly. You can purchase your entry for 65x, 135x, or 225x your stake, which gives you 10, 15, or 20 Free Spins respectively.

Please note that the availability of this bonus buy feature in Bonus Bunnies depends on your jurisdiction. Also, triggering the bonus round has no impact on the game’s RTP, which remains stable at 96.21%.

Additionally, the max win potential is a disappointing 922x your stake, which makes this bonus buy slot not so appealing.

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Sweet Bonanza (Pragmatic Play)

Sweet Bonanza slot

Pragmatic Play’s Sweet Bonanza slot is a candy-themed slot with 6 reels and the All Ways game engine. Its variance ranges from medium to high and the game offers an RTP of 96.51%, which is above the industry average.

In other words, for every $100 you bet, the game gives you back $96.51 in theory and in the long run. Here are its bonuses and features:

  • Tumble Reels: Upon hitting a winning combination, the Tumble Reels are triggered, which replaces the winning symbols in the grid with new symbols. The process repeats itself if this triggers yet another win. The Tumble Reels remain active until no winning line is created.
  • Free Spins: Landing 4, 5, or 6 Scatters (represented by lollipops) in the same spin triggers the Free Spins round. You receive 3x, 5x, or 100x your total stake and additionally a bonus of 10 Free Spins.
  • Candy Bomb: During the Free Spins, rainbow-colored Candy Bombs appear, which come with multipliers ranging from 2x to 100x. If you land a winning combination along with 20x Candy Bombs and 10x Candy Bombs, the multiplier values add up to become 30x. This feature can be retriggered
  • Ante Bet: If you increase your bet from 20 to 25 coins per spin, Scatters will be added to the reels to double your chances of triggering the Free Spins.

Sweet Bonanza’s Bonus Buy feature lets you enter the Free Spins round if you put in 100x your stake. However, the RTP remains the same – 96.51%. The max win potential of this sugary extravaganza of an online slot game is a whopping 21,000x your stake.

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Fire in the Hole (Nolimit City)

Fire in the Hole slot

Nolimit City’s Fire in the Hole is a 6 reel mining-themed slot with up to 46,656 paylines by dint of the collapsing reels mechanic. Its volatility is super high, which makes it a high-risk slot game.

The RTP is 96.06%, which is decently above average. It means the game has the potential of paying back 96.06% of what you invest over a period of time.

When it comes to bonuses and features, Fire in the Hole offers the following:

  • Collapsing Mine: Every time a win is registered, winning symbols are removed and replaced by new ones with the help of the game’s Collapsing Mine feature. This activity continues if another winning line is formed from the new symbols and doesn’t stop until no winning line is formed. Winning combinations add additional rows, which can increase the number of ways to win to as high as 46,656!
    • 3 Rows – 486 ways to win
    • 4 Rows – 4,096 ways to win
    • 5 Rows – 15,625 ways to win
    • 6 Rows – 46,656 ways to win
  • xBomb Wild Multiplier: A dynamite detonator, which is the Wild, forms the xBomb Wild. Upon landing, it triggers the xBomb Wild Multiplier feature. It explodes and removes all adjacent symbols except for the bonus. Additionally, it increases the multiplier by +1. Please note that the xBomb Wild need not be part of the winning combination to get triggered.
  • Wild Mining: This feature is activated in the base game when 3, 4, or 5 symbols of the same type land on the reels to horizontally align without making a winning combination. They offer 1, 2, or 3 Wilds respectively. After that, all the symbols except the Wilds and bonus symbols explode to activate a new Collapsing Mine and thus, another chance for a winning combination.
  • Lucky Wagon Spins: Land 3, 4, or 5 bonus symbols to trigger the Lucky Wagon Spins feature. On average, 200 spins are required to activate it. This round starts with 2, 3, or 4 rows getting unlocked, which then fetch you 3 Free Spins. At this point, the reels will be formed of blanks and coins, with each coin resulting in a cash prize and resetting the Free Spins count to 3.

The bonus buy feature in Fire in the Hole slot by Nolimit City lets you enter the Lucky Wagon Spins feature for 60x, 157x, or 500x your stake. Meanwhile, the RTP rises from 96.06% to up to 96.96%! The max win is a staggering 60,000x your stake, which makes this online slot worth a spin.

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RTP and bonus buy

SlotsRTP in base gameRTP in bonus buy
White Rabbit9597.24
Extra Chilli96.1596.82
Dead or Alive 296.8296.82
Money Train96.298
Money Train 296.498
Money Train 396.196.5
Jammin’ Jars94.2596.83
Nitropolis 29595
Nitropolis 39595
Nitropolis 39595
Space Wars 296.0596.05
The Dog House96.5596.55
Let it Slide96.495.1
Taco Brothers Derailed9595
Bonus Bunnies96.1496.43
Stay Frosty96.2196.21
Sweet Bonanza96.5196.51
Fire in the Hole96.0696.96

History of Slots with Feature Buy

The concept of Bonus Buy Slots first emerged in the online gambling industry in 2017 with the release of Big Time Gaming’s White Rabbit MegaWays. This game type has since become a popular choice for players.

Controversies Surrounding Feature Buy Slots

The introduction of the feature buy option in slots has sparked much controversy, particularly due to concerns over player vulnerability and the potential for excessive spending.

The ban on this feature in the UK serves as a testament to the level of concern surrounding it. Critics argue that it puts players at risk of spending large amounts of money within a short amount of time.

On the other hand, supporters argue that they appreciate the freedom of choice offered by feature buy slots. They may often spend more in pursuit of a bonus, but they believe that buying the bonus directly offers a sense of control and reduces the unpredictability associated with slots.

How Slots with Bonus Buy Work

When playing Bonus Buy Slots, players have the option to purchase a bonus round by paying an additional fee. This fee is usually a multiple of the player’s initial bet and can range from 1x to 500x the base bet or even more.

Once the bonus round is activated, players can enjoy additional features such as free spins, multipliers, and other bonus games.

These bonus rounds offer players a higher chance of hitting big payouts and can be a lucrative option for those looking for an exciting gambling experience.

Advantages of Bonus Buy Slots

One of the main advantages of Bonus Buy Slots is the increased control they give players over the gameplay. Players can choose to purchase the bonus round whenever they feel ready, rather than having to wait for it to trigger randomly.

Additionally, the chance for a higher payout and the excitement of the bonus round makes for a more thrilling gambling experience as more often than not, the RTP of a slot increases in the bonus round. Of course, plenty of exceptions exist.

To conclude, Bonus Buy Slots provide a fresh take on conventional slot games and offer players a more engaging and speedy betting experience. By allowing players to buy bonus rounds for a higher payout, these games give players more control and an opportunity for larger payouts.

Whether you are a seasoned slot player or just starting in the world of online gambling, Bonus Buy Slots are definitely worth a spin.