The Best Free Bonus Slots – Play Free Casino Slots with Bonus Rounds

Do you like playing online slots with bonus rounds? Do you love getting freebies? If you've answered those two questions with 'yes,' this post is for you. We are about to give you essential info, such as game categories, best casino operators, and tips on how to play. But let's start with the best free bonus slots for 2021:
Best Free Bonus Slots Top Casino Theme RTP Paylines Rating: Secure Link:
Medieval 95.90% 243
5.0 ★ out of 5
grandivy.com
Cartoon 95.39% 40
4.95 ★ out of 5
mansioncasino.com
Music 94.20% Cluster Pays
4.90 ★ out of 5
playojo.com
Jungle 95.79% 20
4.90 ★ out of 5
partycasino.com
Magic 95.03% 25
4.85 ★ out of 5
casino.com
Music 96.91% 20 Ways to Win
4.80 ★ out of 5
mrplay.com
Cartoon 96.00% Cluster Pays
4.75 ★ out of 5
777.com
Mexican 96.84% 40
4.70 ★ out of 5
karamba.com
Irish 95.00% 20
4.65 ★ out of 5
888casino.com
Mytho­logy 96.75% 20
4.60 ★ out of 5
betway.com

As you can see, we have compiled a rather diverse collection of slot games. There are titles with various themes, including mythology, music, Irish luck, among others. But we haven’t given you just any online slots. These are the crème de la crème free bonus slots games you can find. If you’d like to find out how to make the best of online slots, have a look at our guide to the best slot sites.

Now, before we jump into a short presentation of each free slot with an emphasis on its bonus rounds, we’d like to let you know that’s not all we’ll do in this review. Read on for lots of fun facts concerning the best free bonus slots, including the greatest online casino operators for each game. Feel free to visit those safe sites and play the slots. We’d also like to let you know that you can play many of our featured games with a slots deposit bonus. And players in Canada can enjoy many of our featured slot games with casino bonuses in Canada.

Top 10 Free Slots with Bonus Features

1. Avalon II

Avalon II is a Medieval-themed slot from the gaming giant in the slots category Microgaming. It has an engulfing theme and memorable symbols, but what it really stands out with are the 8 formidable bonus rounds. These can be triggered randomly, which builds up the thrill of the game, pumping the player’s adrenaline high. If you enjoy a good adrenaline rush, have a look at the best free slots games to play for fun.

Free Demo of the Avalon II Slot Game

All eight bonus features borrow themes from the legend of King Arthur. For example, during the Lake of Legend bonus, you’ll have the chance to re-forge Excalibur, thus building a payout of up to 15x your bet. If you like playing online slots games for free with bonus rounds, Avalon II should be at the top of your list.

2. Pink Panther

Put on your rose-coloured glasses and join the famous cartoon character in this Playtech game. The Pink Panther slot boasts 5 bonus games. These can be triggered randomly, which means you’ll have a hard time staying away from the fun theme and symbols and the opportunity of a free bonus round that might be waiting at the next spin. Speaking of that, this slot can be used in conjunction with some of the best latest casino bonuses.

Play Pink Panther for Free

Instant play

You’ll have to make some important decisions. For instance, during the Pink Trail bonus, you’ll be able to follow in the footsteps of the legendary Inspector Clouseau, and you’ll have to choose whether to collect your winnings along the way or continue for a chance of a bigger reward. No matter what you decide, we’re certain you’ll have a lot of fun playing Pink Panther.

3. Twisted Sister

The Twisted Sister slot was inspired by the 1980s metal band with the same name. It is the work of Play’n GO, a game developer known to pay tribute to rock and metal bands. Despite the powerful rock theme, complete with the right sound effects and images, this slot has some entertaining bonus rounds. Triggered randomly, the Twisted Sister slot bonus rounds include the band features Scream, Go Wild, and Unite.

Twisted Sister Free Slot with Bonus Features

Rock fans will go wild for the We’re Not Gonna Take It feature, in which the Angry Dad Scatter overcharges the Angry Meter, thus raising the win multiplier by 1. Watch out for the Mega Band symbol, which also works towards amplifying your winnings. Give this Play’n GO online slot a try and see for yourself why Twisted Sister is one of our top online free slots with bonus feature. Check out also the best free casino online slots with no downloads.

4. King Kong Cash

The King Kong Cash slot from Blueprint Gaming offers a very friendly version of the famous fictional monster. Far from instilling fear, this gentle giant is cute and loveable and even voices the player’s disappointment when a spin doesn’t produce enough bonus symbols to trigger a bonus round. Speaking of bonus features, this slot game has 5.

Free Demo of the King Kong Cash Slot

Instant play

You’ll be keeping your fingers crossed for the monkey napping by the reels to wake up because that’s when the bonus features are triggered. Each of the five bonus rounds has its advantages. For example, during Barrel Blast, King Kong throws golden barrels at the reels, replacing symbols to form winning combinations. The King Kong Cash bonus rounds are worth playing for, and the beautiful imagery makes the wait all the more pleasant.

5. Miss Fortune

Playtech’s Miss Fortune is no misfortune. In fact, it centres on a feisty good witch teaching magic – Miss Fortune. The magic theme is developed masterfully. There are all kinds of symbols that recall magic and sorcery. Even the spin button is placed over a black cauldron. Far from spooky or scary, the game has a cute and charming atmosphere.

Miss Fortune Demo Game

There are a few bonus features to look forward to. Perhaps the most interesting one is the so-called Teacher’s Pet bonus round. This interactive feature is triggered by three bonus symbols landing on the reels. During the bonus game, you’ll have the chance to help Miss Fortune find her cute pet baby dragon that’s hiding in a locker. You’ll be awarded 10 picks. The more times you find the dragon pet, the higher your reward. Depending on this game’s availability, it can be played in conjunction with a top gambling bonus.

6. Jimi Hendrix

This NetEnt slot was launched in 2016, but it manages to bring the good vibes of the 1960s to the 21st century. Jimi Hendrix, who has inspired this game, needs no introduction. You’ll hear his easily recognisable voice and guitar throughout the game, while the symbols, such as the peace symbol, a flower, and a heart, call on the flower power generation.

Free demo of the Jimi Hendrix Slot game

The Jimi Hendrix slot has a number of excellent bonus games, including Purple Haze, Red Guitar Re-Spin, and Pick and Click. The last one is triggered by 3 Scatter symbols. The Pick and Click game consists of a coin win and three types of free spins – Crosstown Traffic, Purple Haze, and Little Wing. During the bonus round, players click on loudspeakers to reveal four types of symbols – three of the same symbol award the respective prize.

7. Reactoonz

If you want to play free casino slots with bonus rounds, this player favourite from Play’n GO is a must-try. The Reactoonz video slot uses the typical for this game developer 7×7 grid, but that’s where anyone’s predictions end. Nothing could prepare you for the cuteness of the aliens that are anything but scary and the fun time this slot promises. That’s why we won’t even try.

Free Demo of the Reactoonz Slot

Instant play

We’ll focus on the awesome Reactoonz bonus features. The bonus round is called Quantum and is awarded randomly after winning on 25 symbols. It may trigger up to four Quantum features – Implosion, Incision, Demolition, and Alteration. But then, if the four features are followed by a fifth charging, you’ll get the bonus Gargantoon feature, during which you’ll see a 3×3 monster that serves as a Wild and substitutes all symbols.

8. Spiñata Grande

Are you looking for a free slot with lovely bonus features to play on your mobile? If the answer’s yes, Spiñata Grande is what you need. This NetEnt classic is favourite for many players, but does it have what it takes in terms of features? Also, can you play it for free? Indeed, this piñata-themed slot game has got it all.

Spiñata Grande Demo Slot

Spiñata Grande will keep you entertained with beautiful graphics and cheerful audio, while keeping you excited for your upcoming wins. Launched in 2015, the game is just as exciting as it was in the beginning. It is a sight for sore eyes, a unique combination of colossal symbols, free spins, and a mini-slot feature. And all these come frequently enough. If you like being awarded free spins, here are the top free spins bonus offers.

9. Rainbow Riches

When the theme of Irish luck is mentioned, many fans of slots think of this particular game. But it’s not just one of the most popular Irish-themed slot machines. Rainbow Riches is also your go-to title when you want to play online slots games for free with bonus rounds. This Barcrest game has all the symbols you’d expect – a pot of gold, a rainbow, and an impish elf. Keep in mind that this game is often eligible for many of the best casino bonuses for Indian players as well.

Rainbow Riches by Barcrest Free Demo

Judging from the graphics and audio, Rainbow Riches might seem a bit dated, but that’s exactly what some players would appreciate. Moreover, it has 3 bonus features, so you have something to look forward to. The bonus rounds have appropriate names – Road to Riches, Wishing Well, and Pots of Gold. As soon as you trigger a bonus feature, you’ll forget whatever drawbacks the Rainbow Riches graphics might have.

10. Hot as Hades

We’ve got one last recommendation for fans of online free slots with bonus feature, so if you’d like to have more, check out our blog post about the top slots with bonus games. Hot as Hades is a Microgaming slot inspired by Greek mythology. And yes, Hades is the name of the Greek god of the dead and by association – hell. But don’t expect anything scary. The whole game setup is very positive and playful.

Play Hot as Hades for Free

The Hot as Hades slot is a lovely game, but more importantly, it has some lovely features. There’s a Super Mode option that rewards you with free spins. However, we’re interested in the Quest for the Crystal Helm bonus round, which can be triggered by 3 crystal skull symbols on the reels. There are 5 levels, and you’ll have to make lots of choices that could potentially bring you big wins.

How to Play Free Casino Slots with Bonus Rounds

We love getting freebies, and there’s nothing wrong with that. It’s just that the human brain is wired that way. So, if you enjoy spinning the reels, online gaming is the place to get the most out of bonus rounds. If you’re new to iGaming, you’d better start with our extensive online slots guide for everything slots related.

But how do you play slots with free bonus rounds? There are so many slots online that if you were to look for them yourself, it would take you forever. That’s why the first step is getting info on which particular slots to play and where to play them. We have provided both. Moreover, we have given you the 10 best free bonus slots you can try. Check them out here and visit our recommended casino to try them in demo mode.

Best Free Bonus Slots Casinos for 2021

We wouldn’t give you a list of slot titles and leave you wondering where to play them. That’s why we will now turn to the best UK operators providing free bonus slots for your entertainment. We’ve ranked them for your convenience. We have also quoted their best online slots bonus offers.

These top casinos aren’t just generous enough to give you a taste of these awesome slot games and tempting bonuses. These are all respectable online operators that have all the licences and certificates to prove they are legit. They use secure technology to ensure your personal and financial data is safe. They are regularly tested for fairness and compliance by regulatory bodies such as the UKGC. So, here are the best casinos for free slots with bonus features:

Best Free Bonus Slots Casino Welcome Bonus All slots Jackpots All Games Site Rating Secure Link
£400 + 100 Spins 450+ 20 500+
4.95 ★ out of 5
leovegas.com Full T&C’s apply. Free spins - no deposit required & new players only. Claim within 3 days of registration & 3 day expiry. Free spins worth £0.10 each on Book of Dead, winnings paid as cash. Deposit offers available across any two deposits. Both expire 7 days after registration & have 7 days to wager once claimed. Deposit £10, £25 or £50+ & wager 35x for a cash reward. Only cash stakes qualify & wagering contributions vary. 5 free spins on Book of Dead with each qualifying deposit, 3 day expiry.
£100 + £88 Free 500 27 550+
4.90 ★ out of 5
888casino.com Full T&C apply New players only • No Deposit Offer: Claim in 48 hrs • 14 day expiry • FP wins are credited as bonus and capped at £10, exc. JP win • 50x wagering • Deposit Offer: £20 min deposit • Claim in 48 hrs • Valid for selected games • Bonus wins capped at £500, excl. JP wins • Pre-1st deposit only: Bonus wins & max redeemable amount capped at £100, excl. JP wins • 30x wagering – req. vary by game • Bonus expires in 90 days • Payment method & country restrictions apply • No Deposit Offer terms & Deposit Bonus Offer terms. BeGambleAware
£200 Welcome Bonus 250 68 300
4.85 ★ out of 5
mansion.com Full T&Cs apply. New customers only. Min deposit £20 max bonus amount £500. First deposit: 100% up to £200. Second deposit: 50% up to £300. Wagering 40x for each bonus. Game weighting applies. Cashback: 5% cashback on first and all other deposits during week 1, 10% cashback on all additional deposits taking place in week 2 only. Bonus betting limits: slots - $/£/€5 all other games – 10% of bonus amount.
£50 Welcome Bonus 300+ 18 400+
4.80 ★ out of 5
betway.com Full T&Cs apply. *New Customer only. Opt-in required. This offer is valid for selected customers only, until 28th February 2022 23:59 UTC. 50 Bonus Spins are awarded upon successful first deposit. 100% match bonus up to £50 on 1st deposit of £10+. 10 bonus spins credited on a daily basis for 5 days. Winnings from bonus spins are subject to wagering of 30x playthrough requirements. Irregular gameplay may invalidate your bonus. Debit card deposits only. This offer is valid 7 days from when your new account being registered. Other conditions apply. 18+ Bet the responsible way – begambleaware.com.
£200 + 100 Free Spins 315 10 420+
4.75 ★ out of 5
mrplay.com Full T&Cs apply. New players only. 18+. Min deposit £10. Welcome package splits over 3 deposits, 35x wagering requirements apply to match up bonus. Offer valid for 1 week. 100 spins split to 20 spins a day for 5 days. 50x wagering requirements apply to spins.

Best Bonus Slots to Play for Free by Category

If you don’t feel like trying out the top free bonus slots games one by one, but you have preferred themes of slots, this selection is for you. Keep in mind that many of these lost are eligible for any best casino bonus in the Philippines. We have hand-picked the best free slots with the most exciting bonus rounds and presented them to you as the winners of categories, such as overall best, highest RTP, top slot on the go, the most successful game dedicated to music and Irish luck respectively.

🥇 Overall Best Free Bonus Slot Avalon II
📈 Highest RTP Free Bonus Slot Jimi Hendrix
📱 Top Mobile Slot with Free Bonus Rounds Spiñata Grande
💛 High-Rated Free Slot with Bonus Features Pink Panther
🎶 Top Music-Themed Free Slot with Bonus Rounds Twisted Sister
☘️ Best Irish-Themed Free Bonus Slot Rainbow Riches

Frequently Asked Questions

Our presentation of the top online slots games for free with bonus rounds has come to its end. Feel free to try any or all of the games. We guarantee that these slot titles are worth your time. Still having questions or doubts? We’ll wrap this post up with a few common questions and answers.

🥇 What are the best free bonus slots?

If you want to play only the best games, we recommend having a look at our presentation of the top free bonus slots games. We have ranked the games and provided you with helpful details, such as RTP, paylines, best casino to play, etc. We have also given you more info on each slot.

📊 What are the types of free slots with bonus features?

There are so many free slots with bonus features that finding one isn't the problem. However, if you don't want to play just any game, check out our free bonus slots by category for a chance to find what you need faster.

📱 What's the best free bonus slot game to play on the go?

Among the many cool slot games with free bonus features, some are the perfect choice for playing on the go. Our top pick for a mobile slot with free bonuses is Spiñata Grande. This NetEnt classic game that looks excellent on any device is particularly well-suited for smaller screens.

✅ Are there any free slots with bonus rounds?

If you want to play free casino slots with bonus rounds, there are plenty of choices. In fact, we've selected the top 10 free bonus slots and presented them by giving you all the necessary details. We have mentioned the game developer and the RTP, but we've put an emphasis on the bonus rounds you can look forward to.

🎰 Which are the best online casinos to play free slots with bonus rounds?

We have given you the names of the top online slots games for free with bonus rounds. We've rated them and explained what's so great about those titles. But that's not all the info you need. That's why we've added the final piece of the puzzle, the top casinos for free bonus slots.

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