Best bonus slots

The best slots with bonus games

Slots today have come a long way since the days of the lever-operated slot machine, and players' expectations have changed, especially with regard to slots with bonus features. Although the concept is still the same—you still have to click on a spin button in the hope of landing on a combination of the same high-paying symbol—in slot machines with bonus games there are a number of features which are meant to make the gameplay much more entertaining and rewarding, boosting your slot wins significantly (depending on which slot you choose to play, of course!). In this article, we'll introduce you to the best slots with bonus games that you can enjoy from the UK and let you know where to play them for free and for real money. If you love to try something new, you can also check out our article about New Slots 2020, where you'll discover some of the best new slots with bonus games for the coming year.

Top 10 slot machines with bonus games

To save you precious time, we've prepared a list of the best slots with bonus games which you can enjoy at several online casinos in the UK. These are all popular titles by licensed providers which originality, entertainment and exceptional graphics with a great mix of features, including, of course, a bonus round!

1. BloodSuckers slot - 98% RTP

One of the reasons why NetEnt's BloodSuckers is one of the best paying slots online is the fact that it comes with a great bonus game that significantly increases its return to player percentage in the long run. If you get 3 bonus symbols in a payline, this will trigger the Click Me Coffin Stabbing Bonus Game, which will prompt you to open up coffins and stab the vampire inside it! In this way, you can win prizes of up to x203 times your stake, and keep winning until you come across an empty coffin. Blood Suckers slot also comes with a free spins feature that triggers 10 free spins with a 3x multiplier, significantly increasing your chances of winning bit! Play it with Casumo Casino to benefit from exciting promotions and a welcome bonus on slots.

Bloodsuckers bonus game

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2. Mega Fortune slot - 96.6%

If you're after a bonus game that can literally pay out millions, then you should definitely check out NetEnt's famous progressive slot, Mega Fortune. The bonus game in Mega Fortune involves a Wheel of Fortune with 3 layers, and depending on where you land when you spin, you either get a cash prize, or continue to progress up the layers to a jackpot prize! The Mega Jackpot starts from £250,000, but being a progressive game, you can normally expect the jackpot to reach much higher amounts! Try it out at Unibet casino to benefit from a cool welcome bonus, including 200 free spins on deposit if you're a new player!

Mega Fortune bonus wheel

£ 40 bonus on first deposit.
18+ BeGambleAware 18+ | BeGambleAware | t&c Apply | New Customers Only. Minimum deposit £10. 35x wagering requirement applies. Bonus will expire 30 days after opt-in.

3. Hugo 2 - 96.53%

Part of the Hugo series of slots by Play N Go, Hugo 2 comes with an adventurous bonus game involving treasure chests and multipliers! It all starts during the free spins round, when players can trigger the Skull Cavern Bonus feature. Hugo enters the cavern with a number of lives, and players have to help him reach the treasure chamber by picking pedestals for him to step on. However, not all pedestals are safe, and Hugo may end up being squashed or blown away, thus losing a life. Should you manage to make it to the end and recover a treasure, you could walk away with a x5 multiplier applied to your treasure chest winnings! Play it at PlayOjo casino to enjoy additional cashback on every real money bet!

Hugo 2 slot bonus round

80 no wagering free spins on first deposit.
Exclusive Offer
18+ BeGambleAware 18+ | BeGambleAware | t&c Apply | New Customers joining via this site only. Min deposit is £10. 50 Free Spins on Book of Dead. Spin Value: £0.10. After your first deposit you may claim your 30 Extra Free Spins by visiting the Kicker Section. No min withdrawal.

4. Who Wants to Be a Millionaire Megaways slot - 96.24%

Big Time Gaming's branded slot, Who Wants to Be a Millionaire Megaways brings all the popular TV show to the reels, and involves a Hot Seat Free Spins bonus game that allows you to gamble your winnings for a chance to win even more! The free spins round comes with a spins ladder, which players can climb up by choosing different answers (from A, B, C and D). If they happen to answer correctly, they can progress up the ladder, whereas if they get an incorrect answer, the round will end and players will get the number of spins they've collected up till that point. These spins will start with a 1x multiplier, which will keep on increasing by 1 with every spin! Sounds exciting? Try it out at Dunder casino for a chance to win £1,000,000 (which, unsurprisingly, it the maximum payout available!)

Slots with bonus games - who wants to be a millionaire megaways

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5. Temple of Treasures Megaways - win up to 50,000x!

If you love free spins with multipliers, then you can hardly go wrong with Blueprint Gaming's Temple of Treasures Megaways. This is a slot game with free spins that comes with incredible potential, and that may pay out up to 50,000x your stake! Once you trigger the free spins round, you can choose from 4 different ways these spins will play out by choosing the number of spins and the number of ways to win (the more spins, the lower the ways to win). The good news is that these free spins come with an unlimited win multiplier - the latter increases with each consecutive win. What's more, Temple of Treasures Megaways gives you the option to buy into the Bonus feature (the price is 100x your stake) so if you love slot games with bonus rounds, you don't have to wait to access this one!

slots with free spins - Temple of Treasures

6. Guns N Roses slot - 96.8%

NetEnt's rock-n-roll-themed Guns N Roses has become a real classic, partly thanks to its exciting free spins round and bonus game. The Crowd Pleaser Bonus Game is a Bonus Wheel which comes with 3 levels. Players will get coin wins for their picks, and at the same time, they'll be able to listen to a number of Guns N'Roses hits as they spin! Play it at any NetEnt casino to enjoy some great music as you attempt to get the most out of its bonus features!

Guns N Roses slot with bonus game

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7. Deal or No Deal What's in the Box - 92.60%

Another slot based on a popular TV show, there's no shortage of bonus games in Blueprint Gaming's Deal or No Deal slot. This slot comes with 5 bonus rounds, including free spins and bonus games: the Go All the Way Bonus feature, thanks to which players can walk away with a cash prize, the Trail of Wealth bonus feature (which involves Super Multipliers, Mystery Positions, and Mystery Win boxes), the Seal of Success Free spins feature, the Powerplay free spins, and the Deal or No Deal bonus, which looks like the actual Deal or No Deal game, played against the banker for a chance to win up to 2500x! Try it out at William Hill and claim a bonus of up to £300 if you sign up at a new player.

£ 300 bonus on first deposit.
18+ BeGambleAware 18+ | BeGambleAware | t&c Apply | New customers to the Casino page only. Opt-in required. Min. £10 Buy-in. Max. £300 Buy-in. 40x wagering requirement applies to Bonus Available once per customer. Bonus expires 7 days from issue. Game weighting, player, currency, country & game restrictions apply.

8. Dead or Alive II - win over 100,000x!

If you're looking for an extremely rewarding slot with free spins, then NetEnt's Dead or Alive II is definitely one of the first the check out. Dead or Alive II allows you to choose from 3 different free spins rounds: the Train Heist free spins, which come with a multiplier that keeps increasing, the Old Salon free spins, where all wins are multiplied by 2 and wilds remain sticky after every spin, and the High Noon Free spins, which come with the potential of unlocking a 15x multiplier that can pay up to 100,000x your stake!

£ 100 bonus on first deposit and 300 bonus spins on first deposit.
18+ BeGambleAware 18+ | BeGambleAware | t&c Apply | 18+ Full T&C's Apply. New players Only. £10 min deposit. £5 max bet using bonus. 60x (40x referred player) wagering applies. Bonus valid for 14 days. 30 Spins will be credited instantly upon qualifying deposit + then 30 per day for 9 days on Starburst. Free Spins valid for 72 hours from credit. Max Free Spins winnings £100. Ewallets excluded. -

9. Piggy Riches slot - win up to £360,000

Although it's been released quite a while ago, NetEnt's Piggy Riches has remained popular mainly due to its free spins bonus game with multipliers. If you're lucky to get 5 scatters, you'll activate this free spins round with 28 free spins combined with a maximum multiplier of 6x. It's a nice slot with a cute, lighthearted theme, and which also features scatter wins and wilds in addition to its bonus round. Try it out at LeoVegas casino to play it for free or with bonus funds!

Piggy Riches slot free spins

£ 100 bonus on first deposit and 30 no wagering free spins on first deposit.
Unlock up to £100 Cash + 20 Wager-Free Spins
18+ BeGambleAware 18+ | BeGambleAware | t&c Apply | Full T&Cs 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. 10 free spins on Book of Dead with each qualifying deposit, 3-day expiry.

10. Mercy of the Gods - progressive slot

NetEnt's recent progressive jackpot slot is an Egyptian-themed title which comes both with free spins as well as a bonus game called the Gift of Wealth Jackpot feature. This game involves filling up the blank reels with bonus symbols, and unlocking a jackpot for every row you manage to fill up. There are 3 jackpots to be won: the Minor Jackpot, which pays out 20x your stake, the Major Jackpot, which pays 100x the stake, and the Mega Jackpot, which is progressive and keeps increasing until it is won! Try it out at Royal Panda casino to benefit from its regular free spins for existing players.

Mercy of the Gods slot bonus game

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How to find the best slots with bonus games

In our opinion, the best bonus slots are characterised by two factors:

  • A. how often you can expect to trigger the bonus game, and
  • B. the additional features that come into play during the bonus round.

Bonus frequency is important because in most games, it's during the bonus rounds that you'll get the highest payouts. Therefore, the aim should be not to lose all your balance before triggering this bonus round. Nowadays, you can get an idea of the bonus frequency by checking slot reviews or using a tool called Slot Tracker, which provides real-time data about thousands of online slots.

When it comes to additional features, you should choose a slot with a rewarding bonus game so as to compensate for any previous losses. Nowadays, we expect more than just a bunch of free spins on their own. Things to look for in bonus rounds are multipliers (these usually award the slot's maximum payout), sticky symbols, additional high-value symbols on the reels and the possibility of retriggering free spins. And of course, it's also worth going for slots with high RTP to have a higher probability of winning more in the long term.

New free slots bonus games - how they work

Slots with bonus games can take a variety of forms nowadays. In this section, we'll look at the most common types you will encounter:

Free Spins bonus game

Free slot games with bonus spins are very common nowadays; these work by rewarding you with a set number of in-game free spins if you manage to land on certain symbols. These symbols are called ‘scatters’, and you typically need to land 3 of them in order to trigger the bonus spins. These bonus spins play out at no extra cost, and will have the value of how much you staked on the triggering spin. In other words, if you were staking £1 on each spin and get 10 bonus spins, each of these spins will have a value of £1, meaning that any wins you land on will be multiplied by £1 (i.e. if you land on a winning combination that offers 10x your stake, you get a payout of £10). What's more, during the free spins round it's quite common to get extra features that increase your chances of winning. These features could be anything - low value symbols may transform into higher-value symbols, extra wilds that drop onto the reels, multipliers, or even random cash prizes!

The best free spins slots are those that can be re-triggered (i.e. players can get another set number of spins if they manage to land on certain symbols during the round). You will also find multiple-level free spins, which allow players to progress up multiple free spins levels, each of which will involve better payouts, as well as free spins rounds that give you access to a jackpot.

Pick and Click bonus game

Another common online slot bonus game is the pick and click bonus. In this case, landing on a certain combination of symbols will transform the reel set into a pick and click game, and you'll see a number of items to pick. Underneath each of these items there may either be a prize or nothing at all - it's all down to luck! Players will be prompted to click on the items to reveal the prize, and normally the bonus game will continue until no prize is revealed, and the players will walk away with the prizes collected up until that point (which could be win multipliers or cash prizes). One example of a pick and click bonus is the coffin game in BloodSuckers slot. In this game, players will keep winning prizes as long as they open a coffin that contains a vampire, but if they pick an empty coffin, the round will come to an end.

Wheel of Fortune bonus game

A slot bonus game can also take the form of a Wheel of Fortune, such as the one which leads to the jackpot of Mega Moolah and Mega Fortune. This bonus game is very simple - you just have to hope that the arrow lands on a big win or on a jackpot prize!

Adventure bonus game

As slot developers are getting more and more creative with bonus games, these days they may take any form. The bonus game in Hugo 2 slot, for example, involves a Pick and Click Bonus game where players try and help the protagonist Hugo reach a treasure chamber by choosing pedestals for him to cross a deep chasm. Hugo will start the bonus round with a certain number of lives, and will lose a life each time the player picks the wrong pedestal, causing him to fall off. If he gets to the treasure chamber with all 3 lives preserved, players will get a 5x multiplier applied to the treasure chest winnings!

Play free slot games with bonus features

With such a huge selection of online slots today, we don't blame you for finding it difficult to decide which ones to go for. If you're still trying to decide whether or not a slot is worth playing for real money or not, then you should know that you can always play free slot games with bonus features to get an idea of what they involve. Usually, playing a couple of dozen spins for fun could be enough to trigger the bonus round, in which case you'll be able to see whether the bonus is worth playing for.

When you play free slot machine games with bonus rounds, you will be playing with 'fake' coins which you can never withdraw. However, the size and frequency of payouts will be exactly the same as if you were playing the same games with real money, allowing you to get a very good idea of how rewarding the game is. When you hit the bonus round, we suggest observing by how much your coin amount increases, to be able to gauge how rewarding the bonus is. Of course, how much you win from a bonus also depends on your luck, but normally you can always expect to win more than you would during the base game (if the bonus round is any good).

To start playing free slot games with bonus features, we recommend registering with an online casino and browsing its slots collection. Some casinos, like Videoslots, allow you to locate games according to their special features, making it easier to find free slots with bonus rounds. As you can notice from the screenshot below, you can choose to view slots with free spins, slots with bonus games and a number of other features. How convenient is that?!

free slot machines with bonus rounds

£ 200 bonus on first deposit and 11 bonus spins on first deposit.
Win up to 4,200 Extra Spins on Battle of Slots
18+ BeGambleAware 18+ | BeGambleAware | t&c Apply | New customers only. £200 bonus + 11 Welcome Spins on a random game. Min. £10 deposit. Bonus will be paid in 10% increments. Spins must be used within 60 days and all winnings will be wager-free. Min. £10 deposit. Bonus must be activated within 7 days. A 35x wagering requirement applies to the bonus.

Casinos offering free slot games with bonus rounds no download no registration

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£ 99 bonus on first deposit and 99 bonus spins on first deposit.
18+ BeGambleAware 18+ | BeGambleAware | t&c Apply | New customers only, min deposit £20, wagering 40x, max bet £5 with bonus funds. 100% up to £99 bonus + 99 free spins on 1st deposit. No max cash out on deposit offers. Skrill or Neteller deposits excluded. #Ad.

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Bonus slots glossary

The below are the most common terms you'll encounter as you read the instructions or help section of a bonus slot game. Some of them have the potential of significantly increasing the payouts, so make sure you take note of them while choosing the best bonus slots to play:

  • Base game - when you start playing a bonus slot, you'll always begin in the base game. The base game is quite simply the slot in 'normal mode', where you have to spin in the hope of landing on a winning combination, or else (even better), of triggering a bonus game. The base game can still involve a couple of features, which may be triggered randomly or by landing on certain winning combinations, but usually these are not as lucrative as the slot's bonus features.
  • Bonus game - a different game within the slot which offers players a chance to win better rewards. This can be in the form of a wheel of fortune which awards you with a number of free spins or a multiplier on your previous win, a pick and click game to match different symbols, or even a little adventure to unlock some treasures (such as the bonus games in Hugo 2 slot). Some bonus games also have different levels, i.e. you can progress from one level to another by landing on certain symbols, so that the rewards keep getting better the more you progress!
bonus slots - Jumanji slot bonus game


  • Cluster pays mechanic - this is the mechanic behind a different-looking kind of slot, whereby instead of having to land symbols on a payline, you have to form clusters of the same symbol. The format of such games is different, and usually consists of a taller grid which contains many more symbols than the standard 5-reel slot. These games pay out more the bigger the clusters are, and normally, to get the maximum win, you would have to fill up the entire screen with the same symbol. If you'd like to play a great cluster pays slot you should check out Reactoonz slot by Play N Go.
  • Slots with free spins - very self-explanatory, these are bonus spins awarded when you manage to land on a combination of a particular symbol, called the scatter or bonus scatter. You normally need to get 3 scatters anywhere on the reels to trigger a free spins round, although getting more than 3 will normally award you with additional spins. Free spins can be re-triggerable, which means that players may trigger another round if they land on a combination of scatters again. These spins will play out automatically - you don't have to click the spin button each time, and following the round, the game will display the winnings you've accumulated.
  • Gamble feature - this is an option found in certain slots to gamble the amount you win following a spin, for a chance of doubling or even tripling that amount. Usually, the gamble or 'double-up' button will light up after a win, and players will have the option to either keep the amount or gamble it for a chance to win even more. The gamble feature is normally played out via a simple game like heads or tails or guessing the colour or suit of a playing card. If you'd like to try out a slot with a gamble feature, we can suggest the recent Legend of the Nile slot.
  • Multiplier - Multiplier slots involve a feature that's programmed to multiply your win a number of times. This can be as little as 2 times or even 10 times, and is normally applied to winnings during a free spins round. In a lot of video slots, this is the most rewarding feature of them all, through which players may land on the game's maximum win, which makes it a feature to look out for if you're after the best paying slots.
  • Payline - also known as betting line or winning line, a slot's payline shows which combinations of symbols will result in a win. This can be as little as 3 or as many as 100! Sometimes, you can activate more paylines by betting a higher amount. You can always check the paytable of a specific game by clicking on the help or info symbol. This paytable will indicate all the winning lines in a slot.
  • Progressive jackpot slots - these bonus slots are linked to jackpots that keep increasing until the jackpot is won. Normally, you'll find these slots under a specific jackpot category at an online casino, which will also display the current jackpot figure. You win the jackpot if you land a certain combination of symbols (with the probability of winning being extremely low). Nowadays, you can find a lot of network progressive jackpot slots which are being fed by players spinning at a number of different online casinos - so that the jackpot keeps increasing until it turns someone into a multi-millionaire!

80 no wagering free spins on first deposit.
Exclusive Offer
18+ BeGambleAware 18+ | BeGambleAware | t&c Apply | New Customers joining via this site only. Min deposit is £10. 50 Free Spins on Book of Dead. Spin Value: £0.10. After your first deposit you may claim your 30 Extra Free Spins by visiting the Kicker Section. No min withdrawal.
  • Wilds - these are symbols that will substitute for any other symbols (normally with the exception of the scatter) to make it easier to form winning combinations - much like the Joker in card games! Wilds normally land as one symbol, but some bonus slots also feature wild reels (entire reels that are turned into wilds), walking wilds (wilds that change position during a bonus game, normally 'walking' from the left to the right of the screen).
  • Sticky wild  - a sticky wild is a wild symbol with an added bonus: these wilds will normally appear during a free spin round or a respin and will remain locked in place for the following spins, giving you more chances of winning.
  • Stacked symbols  - these are symbols which land in a stacked form (on top of each other) and which can increase the potential of winning.
Stacked wilds in Tiki Tumble slot


  • Reels - this refers to the 'vertical columns' of a slot game, as opposed to the rows, which are horizontal. The first slot machines used to have just 3 reels, and some online slots have kept this layout. However, nowadays it's very common to find five-reel slots, which are generally in a 5x3 format (5 reels, 3 rows), and even bonus slots with a completely different reel setup (such as extra reels that are activated when triggering certain bonus features).
  • Respins - quite simply, these spins are extra spins which do not require a stake, and which are normally awarded in certain games after landing on a winning combination, or after getting 2 scatters - for another chance to get one more scatter to trigger the bonus round.
  • Scatter - this is the symbol which triggers the bonus round. Normally, you need to land 3 or more scatters in the base game before activating the bonus.

£ 50 bonus on first deposit and 50 bonus spins on first deposit.
18+ BeGambleAware 18+ | BeGambleAware | t&c Apply | New UK customers only. Opt in required. 1x per customer. Min. £20 deposit. 1st deposit only. Selected games only. Max. Bonus £50 with 35x wagering and 50 Free Spins at £0.20/spin on Starburst™ with 35x Wagering. Free Spins and Bonus credited once deposit amount has been wagered on slots. Bonus and Free Spins expire 7 days after issue. Game weighting, game, country, currency, player restrictions and terms apply.

Enjoy the best slot games with bonus features!

As you can see, we are being spoilt for choice these days when it comes to slot features. Slots with bonus rounds are now commonplace, so the difficult part is not finding such a slot, but actually identifying the ones that are the most rewarding. It's important not to allow a cool-looking bonus round deceive you into thinking that you can really win big. Look at the stats instead, as well as at online slots reviews, or play free slots with bonus rounds yourself to get an idea of how much they pay out. Alternatively, try your luck on one of the top 10 slots with bonus games we recommend above, and keep your fingers crossed!

Slot bonus games FAQs


slots with bonus games UK

£ 400 bonus on first deposit 50 bonus spins.
18+ BeGambleAware 18+ | BeGambleAware | t&c Apply | New players only. 100% match up to £400. One bonus offer per player. Min. deposit £20. Max bonus bet is £5. Bonus spins on selected games only and must be used within 72 hours. Bonus funds must be used within 30 days. Bonus funds are separate to Cash funds, and are subject to 35x wagering the total bonus & cash. Only bonus funds contribute towards any wagering requirements