Outlook Spotlight

Best Bonus Round Slots in 2024 with In-Game Free Spins & Top Bonus Buy Features

Looking for the best bonus round slots? Check out our coverage of the top slot machines with epic bonus features and high RTP rates.

Bonus Round Slots

Let’s face it — you’re here to win. And if you’re tired of playing the same old games with no real return, the best bonus round slots can transform your gameplay experience.

They offer free spins bonus rounds, massive multipliers, and wild symbols that promise dozens more winning combinations.

Playing Book of Pyramids at Slots.lv is our first suggestion. This popular slot machine boasts an industry-leading 97.13% RTP, and the luckiest players can take home up to 9,999x their stake!

Explore hidden treasures in Ancient Egyptian pyramids and unlock bonus rounds for a larger payout.

Still, we’ve got 4 other slots with exciting bonus features that are worth your time. So, if you’re ready to spin for gold, let’s dive in!

Best Bonus Round Slots

1. Book of Pyramids – Best Bonus Round Slot Game Overall

  • RTP: 97.13% 
  • Theme: Ancient Egypt 
  • Maximum Win: 9999x your stake
  • Where to Play: Slots.lv 
  • Bonus: $3,000 + 30 free spins

Book of Pyramids features outstanding graphics, smooth performance, and quality design that hearkens back to Ancient Egyptian times with enchanting wilds and hieroglyphic gameplay.

This BGaming reel promises a 97.13% RTP, and players at Slots.lv could win 9,999x their bet.

You’ll enjoy medium-to-high volatility rates across 9 paylines, and seeing their “scarab” symbol appear gives you one bonus game.

Three, four, and five scatter symbols on reels 2, 3, and 4 trigger a free spins round that can give you 11, 22, or 33 spins. Of course, you can win more!

2. 777 Deluxe – Best Bonus Round Progressive Jackpot

  • RTP: 96.42%
  • Theme: Space
  • Maximum Win: 1,000x your stake
  • Where to Play: Ignition Casino
  • Bonus: 300% match up to $3,000

777 Deluxe lives up to its namesake as the industry’s leading progressive jackpot. You can wager between $0.20 and $100 per spin at Ignition, and their space-themed reels are sure to capture your attention.

Futuristic fruit symbols can spell victory worth up to 1,000x your stake.

The highest payout on 777 Deluxe to date is above $800,000; meaning their 1,000x multiplier is just the base game.

If you trigger three question mark symbols and unlock their bonus round across 5 reels and 10 paylines, you’ll have a chance to land three golden 7s and earn their jackpot.

3. Wheel Big Winner – Largest Payout Potential of Any Bonus Round Slot Machine

  • RTP: 95.76%
  • Theme: Wheel of Fortune
  • Maximum Win: 10,000x your stake
  • Where to Play: Black Lotus
  • Bonus: $7,000 + 30 free spins (200BLACK)

Wheel Big Winner puts you on TV with Pat Sajak as you spin for up to 10,000x your stake. It boasts the highest multipliers of any slot game, and Genii has sponsored numerous six-figure payouts.

Unlike the popular TV show, this slot machine has a 5 x 3 layout & boasts 20 paylines.

You could land as little as 4x your stake, earn free spins, or claim up to 10,000x your line bet if you unlock their bonus round.

With a 95.76% RTP and low volatility rates, it shouldn’t be too difficult to get “Catch 3” wilds & unlock free spins. Win their minor, major, and grand jackpots!

4. Age of Gladiators – Best Free Spins Bonus Round

  • RTP: 94.67%
  • Theme: Ancient Roman
  • Maximum Win: 5,225x your stake
  • Where to Play: Highway Casino
  • Bonus: $7,000 + 100% cashback

Fight to the death for real money on Age of Gladiators – Highway Casino’s leading colosseum-themed slot machine features a 94.67% RTP and maximum wins up to 5,225x your stake.

You will find 5 reels, 9 paylines, and classic bonus symbols that manifest as lethal Roman weapons.

Land 2, 3, 4, or 5 scatters to get 2, 6, 7, or 8 free spins. Once you’ve unlocked the bonus game, all winnings are doubled.

You can even collect more scatters to keep the action going for free. Be on the lookout for ancient artifacts, tigers, fiery Roman wives, and Colosseum wild symbols.

5. 88 Frenzy Fortune – Best Bonus Round Slot Machine for Frequent Multipliers

  • RTP: 96% 
  • Theme: Space 
  • Maximum Win: 2,368x your stake 
  • Where to Play: Super Slots 
  • Bonus: $6,000 + 100 free spins

88 Frenzy Fortune makes use of a futuristic, space-themed interface to keep your attention on the action.

You can win up to 2,368x your stake while you’re flying across the galaxy, and this machine boasts a great 96% RTP with medium volatility. Here, you’ll unlock 3 bonus rounds.

Be on the lookout for koi fish, which serve as scatter/wild symbols. Unlocking their “Frenzy 1” bonus round multiplies your winnings by 18x. If you unlock their “Bonus Frenzy 2” or “Bonus Frenzy 3” rounds, you’ll receive a 2x, 5x, or 8x multiplier. Alternatively, you’ll get a free respin!

Best Bonus Round Slots Sites 

If you’re ready to start playing the best slot games with bonus features, we’ve reviewed five top casinos that have what you’re looking for.

Our experts went the extra mile to discuss each site’s bonuses, available payment methods, and slot selection. You’ll have plenty of room to explore!

1. Slots.lv – Best Bonus Round Slots Site Overall



  • 200+ slots and jackpots
  • $3,000 welcome bonus
  • 30 free spins available 
  • Accepts 5 forms of crypto


  • Bank wire payouts take longer 
  • Nominal cash transaction fees

Slots.lv checks all the boxes with a generous welcome bonus, flexible crypto compatibility, and a stand-out selection that includes 195 of your soon-to-be favorite online slots with bonus rounds. 

Slot Selection: 4.95/5

Slots.lv is home to 195+ classic reels and 41+ progressive jackpots from 14 software providers.

Whether you’re after time-tested games or the chance to bring home seven figures, it’s easy to find your niche, as we detailed in our in-depth Slots.lv review guide! Shopping Spree is their largest progressive jackpot with $1.87 million in prizes.

Other popular games in their selection include Amazonia Bingo, Aztec’s Treasure, and 10 Times Vegas. Finally, you’ll see their newest machines listed in the top menu.

Bonuses & Promotions to Play Online Slots: 5/5

Slots.lv is giving away up to $3,000 and 30 free spins on Golden Buffalo with your first deposit!

Although Book of Pyramids is our favorite slot here, Golden Buffalo comes in close second.

Take advantage of their 96% RTP and hit winning combinations across 243 paylines to bring home a maximum of $22,500 with every spin!

Payment Methods: 4.95/5

You can use Bitcoin, Bitcoin Cash, Litecoin, Ethereum, USDT, VISA, MasterCard, and AMEX to make deposits and receive payouts with Slots.lv.

Withdrawals begin from a minimum of $10. Players can withdraw up to $3,000 per crypto transaction, but Player Transfers go up to $15,000 for high rollers.

Crypto payouts are fee-free, and they reach your account in 24 to 48 hours. Fiat withdrawals have a nominal processing fee, and you’ll see your winnings in 3-5 business days.

2. Ignition – Best Bonus Round Slots Site for Hot Drop Jackpots



  • 250+ classic slot games
  • 14+ “Hot Drop” Jackpots
  • $3,000 welcome bonus
  • 1-hour crypto payouts


  • No phone support
  • Processing fee on card deposits

Ignition might have gotten its foot in the door as an underground poker site, but they’ve since rebranded to accommodate slots enthusiasts with 250 classic reels and 14+ Hot Drop Jackpots. 

Slot Selection: 4.9/5

Ignition works closely with 13+ software providers to deliver a premium gaming experience.

You can play 250 classic reels, a handful of six-figure progressives, and 14+ Hot Drop Jackpots with guaranteed prize drops. Ignition is giving away large pots on an hourly, daily, and weekly basis.

Hot Drop Jackpots possess all the elements of a great progressive game with one key feature – they’ll never make you wait for weeks or even months before spilling the cash.

Enjoy fast-paced action as you play 777 Deluxe, A Night With Cleo, and Year of the Rabbit for hourly cash prizes.

Bonuses & Promotions to Play Online Slots: 4.9/5

Use the promo code “IGWPCB100” with your first cash deposit and score a 200% bonus up to $2,000.

Alternatively, use the code “IGWPCB150” with your first BTC deposit and claim a more generous 300% match up to $3,000! Only half your bonus up to $1,500 can be used for slots.

Casino bettors will have 30 days to satisfy their 25x playthrough and request a bonus payout. 

Payment Methods: 4.9/5

Ignition accepts Bitcoin, Bitcoin Cash, Litecoin, Ethereum, VISA, MasterCard, AMEX & voucher payments.

Withdrawals start from $10 and reach up to $9,500 per bank wire or Bitcoin transaction.

Just keep in mind their 4% processing fee on card deposits. If you’d rather skip the costs and the wait, use Bitcoin to request a maximum of $9,500. Payouts are delivered in just a few hours.

3. Black Lotus – Highest Multipliers of All Bonus Game Slots Sites



  • Fee-free withdrawals
  • Optimized for smartphone users
  • 200+ high-limit slots
  • $7,000 deposit bonus
  • 30 free spins available


  • $150 minimum withdrawal amount
  • Bonus cashout limits apply

Black Lotus has paid out massive sums in winnings since it was launched, and they haven’t changed their tune. Explore 200+ high-limit slots and take home six-figure prizes now.

Slot Selection: 4.85/5

Black Lotus has partnered with Realtime Gaming to host 200+ high-limit slots. Their library is loaded with progressive jackpots, 3D slots, video slots, and graphics-intensive reels that will make you wonder if you stumbled into Caesar’s Palace by accident!

Wheel Big Wins features a 10,000x multiplier, and it’s just one of the many progressives you’ll find at Black Lotus.

To top it all off, you’ll benefit from a high RTP rate across their entire selection.

Bonuses & Promotions to Play Online Slots: 4.8/5

Use the promo code “200BLACK” and claim up to $7,000 in bonuses!

High rollers can also get 30 free spins on Big Game.

There are various other promos available, including slot-specific and crypto offers.

Payment Methods: 4.8/5

Black Lotus exclusively accepts Bitcoin, VISA, and MasterCard deposits. You can deposit just $20 to get started, but all payouts begin from $150.

On the bright side, you won’t spend a dime in processing fees! Crypto and bank wire transactions are sent to your account within 2-5 days.

4. Highway Casino – Best Welcome Package for Slots Players



  • $7,000 welcome package 
  • 100% cashback insurance
  • 250+ slots and jackpots
  • Fee-free transactions


  • Fewer cryptos accepted
  • Cashback only applies to your first deposit

Highway Casino offers the best welcome package for new sign-ups. Aside from giving away $7k in bonuses with your first four transactions, you’ll score 100% cashback on your initial deposit!

Slot Selection: 4.75/5

Highway Casino is jam-packed with 250+ online slots from Realtime Gaming, Rival Gaming, BetSoft, and more.

They launched in 2022, and they’ve flooded their collection with machines not found elsewhere! Play Arabian Tales, Band Outta Hell, After Night Falls & Almighty Dollar.

Bonuses & Promotions to Play Online Slots: 4.9/5

Use the promo code “RACETRACK” and claim a 250% bonus up to $2,500 on your first deposit.

You’ll also get 100% cashback insurance, so your gaming losses are completely covered by the casino! Come back for three 150% reload bonuses up to $1,500 each and get a max of $7,000.

Payment Methods: 4.7/5

You can use a VISA/MasterCard/Discover/AMEX card, BTC, ETH, LTC, NeoSurf, and Interac to make deposits at Highway Casino.

Payouts are issued via debit card, Bitcoin, and bank transfer. New players must fund their accounts with $30 or more to play online slots and claim bonuses.

However, you must withdraw at least $100 per transaction regardless of your payment method. On the bright side, all payouts are fee-free and delivered to your account in 2-4 working days.

5. Super Slots – Best Variety of Bonus Game Slots 


  • 573+ unique slot games
  • $6,000 welcome bonus
  • 100 free spins available
  • Accepts 16 forms of crypto


  • Needs better game categorization
  • Must deposit $100 for spins

Super Slots offers the largest selection of video slots, 3D reels, jackpot games, and time-tested classics for new bettors. Play 88 Frenzy Fortune or expand your horizons with 573+ machines!

Slot Selection: 4.8/5

Uniquely, Super Slots doesn’t have any pop-culture-themed slots. They don’t host repeat titles from other casinos, and their selection of real money online slots is entirely exclusive.

Dragon, Magma, Concept Gaming, and Fresh Deck Studios have put their heads together to host 528+ classics and 45+ jackpots.

Bonuses & Promotions to Play Online Slots: 4.6/5

Use the promo code “SS250” and claim a 250% first deposit match up to $1,000.

If you deposit $100 or more, you’ll also receive 100 free spins on Trinity Reels! Players who come back and use the bonus code “SS100” will see their next five transactions doubled up to $1,000 a piece.

Payment Methods: 4.7/5

You can make deposits with a VISA/MasterCard debit card, money order, P2P transfer, cashier check, and 16+ forms of cryptocurrency at Super Slots.

While their fiat transaction limits are a bit more restrictive, crypto bettors can deposit & withdraw between $20 and $100,000 at once.

All crypto payouts are fee-free and delivered within 24 hours. Cash payouts have a nominal fee, and they reach your account within 1-3 business days.

How to Choose the Best Bonus Round Slots Sites 

Bonus Game Slot Selection 

You should choose online casinos with an expansive selection of slot machines. It’s best to keep your options open!

While our reviews feature the best slot machines with bonus games, you’ll find countless progressive jackpots, top Bitcoin slots , and time-tested reels with any of the casinos we discussed.

Bonuses and Promotions 

We gave a higher ranking to online casinos with generous bonuses and promotions. One of the biggest “selling points” for new players is not needing to spend all their own hard-earned cash.

Our team prioritized cash matches & free spins bonuses with easy-to-unlock wagering requirements.

Payment Options

You should never have to worry about where your money is going when you gamble online, and that’s why our top picks accept a variety of secure payment options.

Players can use numerous cryptocurrencies, several e-wallets, and major debit cards to bank their funds or receive payouts.

Bonuses to Use on the Best Slot Machines With Bonus Rounds

  • Slots.lv: $3,000 bonus + 30 free spins on Golden Buffalo 
  • Ignition: 300% casino & poker bonus up to $3,000 (IGWPCB150)
  • Black Lotus: $7,000 bonus + 30 free spins on Big Game (200BLACK) 
  • Highway Casino: $7,000 bonus + 100% cashback (RACETRACK) 
  • Super Slots: $6,000 bonus + 100 free spins on Trinity Reels (SS250)

How to Sign Up and Play Bonus Slots Online

If you want to play slot games online but don’t know how to get started, you’re not alone. Our experts created a simple, step-by-step guide for beginners. Follow our process to get started! 

1. Create a New Online Casino Account

  • Choose an online casino (our top pick is Slots.lv ).
  • Click the “Sign Up” button and fill out the form.
  • Enter any required personal information/details.
  • Once finished, accept the T&Cs and click “Sign Up.”

2. Verify Your Email Address

  • Check your email inbox for a new message.
  • If you don’t see it, check your spam folder.
  • Click the link inside to verify your email.

3. Make a Deposit & Claim Your Bonus

  • Go back to your chosen casino’s homepage.
  • Click the “Deposit” button and select a payment method.
  • Toggle the switch or enter the code to activate your bonus.
  • Follow the on-screen instructions to make your first deposit.

4. Start Playing Slots With Bonus Rounds!

  • Navigate to the “Slots” category or choose a game from the home screen.
  • That’s it! Now, you can start playing the best online slots with bonus rounds.

Different Types of Bonus Round Slot Machines You Can Play Online 

Online slots might look the same, but there are many different kinds of slot machines you can play. We’ve discussed the differences between seven popular types of slots you’ll find online.

Three-Reel Slots

Three-reel slots are your classic, Vegas-style machine: they’re a bit old-fashioned and simplistic, but there’s still plenty of fun to be had. Their layout features three reels that “spin” after clicking the button. Many three-reel slots include a bonus round that can help you win real money faster.

If you’re a beginner on a strict budget or you’re looking for a game that reminds you of Caesar’s Palace, you’ll have a blast with three-reel slots.

However, they can get boring for high rollers & people who desire a more “in-depth” gaming experience.

Five-Reel Slots

Five-reel slots have a bit more “oomph” with modern-day graphics, more paylines, and more opportunities to unlock bonus rounds with trigger symbols.

Most of the online slots you’ll find have 5 reels that spin once you push the button, and they often boast higher payout potential.

This is because you’ll have more chances to win real money with every spin. Although betting minimums can be a smidge higher than 3-reel slots, it’s a worthwhile investment for gamblers who desire immersive gameplay. Plus, you only have to match three or more symbols to win!

Multi-Payline and Multi-Reel Slots

Multi-payline slots and multi-reel slots give you full customization over your gaming experience. You’ll get to decide how many paylines you want to spin for according to your budget. These kinds of slot machines often contain between 25 - 200 paylines, allowing for loads of flexibility.

Multi-payline slots also feature paylines that work both ways, horizontal and diagonal paylines, and rich bonus features that can elevate your experience with massive payouts.

Although you will need to manually adjust your bets, it’s worth learning how to operate the controls online.

Video Slots

Video slots feature thematic graphics, realistic sound effects, and eye-catching animations. The best part about playing video slots is feeling like you’re inside the casino!

Most online slots are video slots, and they usually feature four to five reels alongside multiple levels and bonuses.

Three-reel slots promise a retro gaming experience, but video slots guarantee immersive play with all the bells and whistles. If you’re not easily distracted by flashy lights, give these a shot!

3D Slots

3D slots are even more immersive than video slots. They’re designed in such a way that gives them a three-dimensional appearance. You can also enjoy outstanding sound effects, amazing graphics, vivid animations, and in-depth bonus games that transport you to another universe!

3D slots take advantage of the latest technologies from top-rated software providers to deliver a gameplay experience like no other. Even their 3D symbols appear to “pop out” from the screen.

Progressive Slots

Progressive slots often come with a high volatility rating, which means that they dish out wins less often. However, when someone does win a progressive jackpot, they’re showered with gold and riches. Not accounting for their massive prizes, they also have a lower-than-average RTP.

As such, progressive jackpots are intended for high rollers who don’t mind spending big to win big.

Although you can place smaller bets on a jackpot machine, they respond more positively to larger spins. Ignition has the best progressive jackpot (777 Deluxe) with six-figure cash prizes!

Branded Slots

Branded slots target a recognizable theme within pop culture – they’re often inspired by movies, TV shows, musicians, and even board games.

Branded slots usually have five reels, and they feature bonus rounds. From Super Mario to Arnold Schwarzenegger, your options are endless!

You might not find the highest RTPs with branded slots, but they’re designed to offer a unique experience based on your favorite pop culture icons.

Tips and Tricks for Playing Bonus Round Online Slots 

Before you get started with our top online casinos, take a moment to make the most of your experience. We’ve discussed three simple tips and tricks that can help you win more often!

  • Play Free Slots First: Playing free slot machines might seem like a waste of time, but doing so can help you get acquainted with the controls and understand how the game’s mechanics work. Most online casinos have a free selection of “demo slots” to whet your appetite for the real thing.
  • Check RTP Percentages: RTP, otherwise known as “return-to-player” percentages, indicate the likelihood of winning real money over time. Seasoned players and game traditionalists swear by slot machines with a 96% RTP or higher. The sole exception here is high-limit jackpot machines.
  • Stay Within Your Limits: When you’re playing online slots with bonus rounds, it’s easy to get caught up in the mix. Keep an eye on your bankroll, do your best to place small bets, and stick with your budget. Once your bankroll disappears, chasing a loss probably won’t get it back up.

Best Bonus Round Slot Machines – FAQ Guide

What Is the Best Bonus Round Online Slot Game? 

Book of Pyramids is the best bonus round online slot game!

This popular BGaming reel features a 97.13% RTP, a maximum win multiplier of 9,999x your stake, and immersive gameplay that lets you find hidden treasures in Ancient Egypt.

Trigger their scarab symbol and get 11, 22, or 33 free spins!

Can I Play Bonus Round Online Slots on Mobile? 

Yes, you can play bonus round online slots on mobile devices. Our top picks have optimized their collections for busy bettors.

You’ll have hundreds of appropriately sized games in your back pocket with Slots.lv, Ignition, Super Slots, Highway Casino, and Black Lotus. Play brand-new online slots from anywhere!

Which Bonus Round Online Slots Pay Out the Most?

Book of Pyramids (Slots.lv) and Wheel Big Winner (Black Lotus) pay out the most, respectively. Book of Pyramids has a 97.13% RTP and maximum winning multiplier of 9,999x.

Wheel Big Winner puts you on Pat Sajak’s famous TV show with a 10,000x multiplier and RTP of 95.76%. Sign up with Slots.lv or Black Lotus to start playing and claim generous bonuses.

Can I Win Real Money Playing Online Slots? 

Yes, you can win real money playing online slots. Our top picks are authorized to accept real money wagers from new players, and they’re all licensed by reputable online gambling authorities.

You’re guaranteed legitimate bonuses, fair games, and timely payouts with our top casinos! 

Comparing the Top 5 Best Online Slots Sites for Bonus Game Slots

Slots.lv : Slots.lv is equipped with 195+ classic slots, and you can play Book of Pyramids for real money. Take advantage of their industry-leading 97.13% RTP and win up to 9,999x your stake! But first, claim up to $3,000 and 30 free spins on Golden Buffalo with your first deposit.

Ignition : Aside from hosting 777 Deluxe, Ignition features 14+ Hot Drop reels with guaranteed prizes. If you need a break from traditional progressives, try something a bit more fast-paced! Claim your 300% casino and poker match up to $3,000 using the promo code “IGWPCB150”.

Black Lotus: Black Lotus promises an average RTP of 97% across their entire slots library, and they’re the best casino site for high rollers. Wheel Big Wins boasts a 10,000x winning multiplier. Get up to $7,000 in bonuses and score 30 free spins on Big Game using the code “200BLACK”.

Highway Casino: Highway Casino features 250+ cutting-edge slots, and they have the best welcome package for new sign-ups. Use the code “RACETRACK” with your first 4 deposits. Then, claim up to $7,000 in bonuses and score 100% cashback on your initial transaction!

Super Slots: Super Slots has the largest selection of classic slots, video slots, and progressive jackpots for new players. After you play 88 Frenzy Fortune, enjoy 573+ reels from 6+ software providers! Use the promo code “SS250” to claim their $6,000 bonus and receive 100 free spins.

Ready to Play the Best Bonus Round Slots?

The online gambling industry is growing rapidly, and more sites than ever have slots with bonus rounds.

Elevate your gaming experience with insane multipliers, immersive graphics, and huge payouts! Book of Pyramids has a 97.13% RTP, and you can win up to 9,999x your original bet.

Slots.lv hosts this Egyptian-themed slot machine, and they’re our primary recommendation for new players. Your options are limitless with 195+ reels and counting! They also have generous bonuses in store for players – you can get $3,000 and 30 free spins right now.

At the same time, we’d suggest playing any of the best slot games with bonus rounds. Just be sure to have fun and gamble responsibly!

DISCLAIMER: 21+ only. The information on this site is for entertainment purposes only. Online gambling comes with many risks. Players are advised to gamble responsibly and only use funds they can afford to lose. Remember, gambling is only intended for entertainment purposes and is not a solution to any financial difficulties.

Gambling laws and policies vary from one region to another. Some sites mentioned in this review may not be accessible in your area. Always do your due diligence and check your local gambling policies. It is always better to be safe than sorry.

If you suspect you’re becoming addicted to gambling, seek help immediately by contacting the National Gambling Helpline at 1-800-522-4700.

The following resources may be helpful as well:




Disclaimer: The above is a sponsored post, the views expressed are those of the sponsor/author and do not represent the stand and views of Outlook Editorial.