Bonus Buy Slots: All Games with Feature Buy Option! (2025)

Play Bonus Buy Slots At One Of These Top Casinos

Bonus buy slots are played just like any traditional game. The only thing that separates them from regular content is the option to pay for a bonus. The price starts at about 50x bet and can reach 2,000x for higher win potentials. Usually, it’s a pack of spins that’s on sale, and some extra boosters and modifiers are included. Bonus buy slot enthusiasts find these games particularly appealing as they provide a chance to maximize winnings quickly.

A slight RTP boost is common if you use a bonus buy feature. However, demo play slots are provided only to explore the content. Many such titles give punters multiple bonus choices. A bonus game round has different potentials and different volatility levels. Safer options ensure more wins will land, whereas riskier rounds have features that can award some massive payouts.

The author of this ingenious solution is BTG, a studio with major innovative bonus buy slot options behind its belt. White Rabbit, their timeless hit, was a breakthrough. It’s still greatly popular and remains a benchmark. Despite many titles flooding the market, the initial solution was so great that nothing has changed much. It was slightly adjusted in later releases to offer a more exciting gaming experience. But the core is still the same, and the free slots demo experience should prove it.

Bonus Buy Variations

Most developers integrate feature buy into their slots and add some modifications to this option. The simplest one is when players get just a single round. But there are other titles with more choices.

• The price isn’t always fixed. It can vary depending on what an online slot bonus offers. It can be more than just a tradeoff between spins and multipliers. This difference is explained by higher win potential. For instance, Deadwood by Nolimit offers two versions. One is priced at a 71x bet, and the other one is a 750x bet. The second round provides an extra boost by converting low-paying icons to wilds on three central reels.
• One more category offers players multiple free slots with bonus rounds plus the added thrill of the bonus gamble. In case they win, more slots and/or a higher multiplier are credited. When it’s a loss, players either return to the main game or have a bonus downgraded. BTG’s Extra Chilli is an excellent example. Players initially get 8 spins, and if they dare to take the risk multiple times, they eventually unlock 24 of them. To encourage risk-taking, the chances of success increase from 50% to 60% after the first successful online gambling attempt.
• Token accumulation is something everyone loves because it helps cut the cost. Not commonly used, it was introduced by BTG in White Rabbit. Instead of charging the full price of slots with a free spins feature, the developer integrated the special icon, a gold coin with the BTG logo. Whenever it shows up, it chips away a portion of the price, and if you wait enough to accumulate, the entry is free. This collection strategy is an exciting alternative whenever paying the full price seems a bit expensive.

What about the Cost?

The price ranges between 50x and 100x bets. If that sounds too expensive, there are still a few options that are cheaper. But of course, you won’t get much potential for paying less. The X-citer series by ELK Studios is probably the cheapest. There’s a range of features to buy, and the lowest price is just 5x.

At press time, the most expensive free feature buy slots are available at San Quentin and Mental. The former feature buy slot machine offers three bonuses for 100x, 400x, and 2,000x. For the maximum price, punters get a bonus packed with everything so that hardly any spin will be a losing one.

To stop bonus buy slot fans from spending too much at a time, the studio limited the max bet to 4 EUR in case of a 2,000x bonus. Meanwhile, 24 EUR and 32 EUR are the corresponding limits for 400x and 100x bonus games. The benefit of getting the most expensive version is that RTP increases from 96.26% to 96.95%.

Fans of feature-packed, expensive online slots bonus games should explore the collection of Nolimit City. This developer typically charges high amounts of money but delivers an exciting experience for the money. San Quentin is their record-breaker when it comes to price, but it isn’t the only title with expensive bonuses. Ready to risk a nice chunk of your bankroll? Check out Deadwood, Bushido Ways, Mental and other titles.

How Do Bonus Buy Slots Work?

In bonus buy slots, there’s a special button on the screen that lets you directly access the bonus features. You’ll usually see this button marked as “Buy Feature” or “Buy Bonus,” and it’s located either next to the game reels or at the bottom of the screen.

Some slots give you just one bonus option, while others have several choices at different prices.
The whole process is quite straightforward — just pick the bonus feature you want, confirm that you want to buy it, and the game will initiate the bonus round immediately.

How to Choose a Bonus Buy Slot

Bonus buy slots provide fun experiences. However, you should also keep your money in check. Here are some tips on how to select the right game:

• Consider the price. Different bonus buy slots have different costs for bonus buy features. Some might charge 50 times your bet, while others, like San Quentin, can go as high as 2,000 times. Thus, always calculate the real money cost — if you bet $1 per spin and the bonus costs 100 times, you’ll need $100 for every bonus round. Make sure you can easily afford to play bonus buy slots a few times.
• Look at the RTP in bonus buy mode. A slot might have 96% RTP in regular play but offers 97% when buying features. Look for these numbers in the game info section. This change in RTP matters since it can impact how much you get back in the long run and the overall experience you’ll have while playing.
• Review win potential. Each bonus feature comes with its own minimum and max win limits. Some games might guarantee at least 10x your bet from each bonus round, while others don’t guarantee any minimum win at all. In addition, pay attention to the maximum potential. Some bonus buy slots cap your wins at 1,000x your bet, while others let you score up to 50,000x or even more.
• Understand the bonus mechanics. Make sure you know what you’re actually paying for. Some bonuses offer you just free spins, while others include extras like expanding reels, multipliers, or symbol upgrades.
• Check volatility levels. High-volatility feature buy slots might not pay anything in several bonus rounds but then pay big wins. In contrast, low-volatility games mean more frequent wins, though they’re usually smaller. Pick the one that matches your patience and the amount of money you’re willing to spend — a high-volatility slot means you’ll need a bigger budget to withstand dry spells.
• Try the demo version first. Most bonus buy slots have free demo versions that let you check out the bonus features for free. Take advantage of this opportunity to get a feel for how the game works, see how often bonuses pay, and decide if you like the features before you start playing with actual money.

Top Titles

We’ve put together a beautiful selection of free slots with bonuses and a free spins round. Start by exploring random titles or simply trust the choice of savvy gamblers and pick the top titles for the ultimate experience. Right here, we list some of the best bonus buy slots that deserve special mention:

• Money Train 2 delivers a mind-blowing experience. It isn’t all about the thrill and eye-popping payouts, but the slot’s potential attracts punters anyway. It’s a masterpiece that exceeds the highest expectations: an extraordinary steampunk wild west environment in combination with special features. This bonus buy slot is famous for its thrilling Money Cart game. A 100x bet is charged for skipping the less thrilling part and landing right where you want to be the most, with a chance to hit up to 50,000x.
• Nitropolis by ELK Studios is another amazing title. A 100x bet unlocks up to 25 FS with locked nitro reels and one random icon that takes the scatter properties. That’s not it. Another bonus round is three times the price of the previous one, but this price increase is totally justified as one guaranteed retrigger comes in the package and ensures two scatter pay icons. An explosive title like this is either loved or hated by different categories of punters. The casino online free bonus is the culmination of the gameplay. Nitro Reels is the source of excitement. It doesn’t really expand but divides into smaller symbols and accommodates up to 12 icons instead of two. If you wondered how 85+ million ways to win are even possible, that’s the answer.
• Dead or Alive 2 has drawn massive attention from the moment it was rolled out. Initially, the studio presented a version without a shortcut to bonuses like a deposit bonus but later launched another version. It has a more traditional set of characteristics and still can appeal to gamblers across the globe.
• Extra Chilli brings a light, positive atmosphere into this otherwise dark-themed collection. BTG created it as a sequel to the all-time player favorite Bonanza. Free online slots with bonuses typically let you simply buy spins, but this one allows anyone to gamble them multiple times. It’s a fun slot that sends positive vibes and offers a thrilling experience. The initial cost is 50x, but every golden coin you accumulate chips away a small portion of the price. It’s a traditional Megaways title with 117,649 win ways, tumbling reels, and an unlimited win multiplier.
• San Quentin by Nolimit City. Even though this developer didn’t invent the feature, it wouldn’t feel right to include at least a single title from its portfolio because of the major impact it had on this category. San Quentin sparked some controversy in the gaming community after slot details were published because of its prison theme and certain imagery that some find disturbing. Its 2,000x price tag also stirred some controversy. Nevertheless, the title has a huge fan base because of its unique theme and thrilling math. A few bonus buy slots like this demonstrate the variety and excitement that can be found in modern slot games.

Should I Play Bonus Buy Slots?

For some, bonus buy slots are an appealing solution that makes gambling much more exciting. But there’s a darker side to this innovation. The feature has influenced player behavior and encouraged taking more risks, which is a major issue. Gamblers can be impulsive, and this additional risk causes legitimate concerns.

Within a short period, they can buy a bonus buy feature multiple times and go broke quite fast. This can worsen the situation with problem gambling. Jurisdictions with a firm grip on the industry don’t approve such solutions. And this probably explains why BTG, the studio that set the trend by introducing free slot games with bonus spins buy, voluntarily stopped adding the option.

So, should you play slots with a feature buy option? Yes, if you play responsibly, and no, if it’s the reason you get carried away. If you can control your behavior and gamble safely, it’s so much fun. The library continuously grows, and many epic old and new titles are available to try. But if you find it hard to control your impulses, it’s better to stay away from bonus buy offers.

Pros and Cons

Alternative Option

An alternative to buying a bonus round is to pay a bit more per spin for increased chances of naturally triggering a casino online free bonus. This option isn’t as common across the industry, but there’s at least one studio that often has integrated it into many of its slots.

Pragmatic Play has an extensive selection of titles with Ante Bet. It costs around 25% extra. The price may vary a bit, but never too much, and it is per spin. Doesn’t seem expensive, but the extra money can eventually add up to a rather significant sum. Usually, the activation of the Ante Bet throws twice more scatters that release free spins. No guarantee, though, that it’ll be hit anywhere soon.

Gates of Olympus is one example. This incredible scatter pays game can sell 15 FS for 100x and additionally offers to pay 25% extra to get to bonuses faster. Free slot demos are available to compare the options.