Online slots with bonus games and free spins modes

Online slots with bonus games and free spins modes

What makes an online slot a great online slot? An awesome design, an amazing theme, a high return to player, a big jackpot? All these are correct, there is no doubt about it, but what makes the gameplay extra special, fun and rewarding are the fantastic bonus rounds and different free spins modes. If you like them, then you are in the right place. We just had a feeling that we should gather together some of our favourite online slots with the best and most unusual bonus rounds and free spins modes. 

Very often we play a slot and really like the bonus rounds, but after a while, we just forget which game was that and struggle to find it again. But in this article, you will have a solid collection of the coolest slots with profitable bonus rounds in one handy place. If you like it, you can even bookmark this article to come back to it later on.  

£ 300 bonus on first deposit and 30 free spins on first deposit.
Wager-free spins
100% bonus up to £300 on first deposit. 18+. No deposit for wager free spins. Opt-in required. Min £10 first deposit for deposit bonus. 30x wagering requirement applies for deposit bonus and winnings. Max £5 per spin or £0.50 per bet line. Contribution to wagering requirements varies per game.

First and foremost: what is a bonus game?

As a general rule, in an overwhelming majority of cases, online slots have the base game and bonus rounds and free spins mode in addition to that. 

The base game is the default mode where you can mostly win by getting 3-5 matching symbols on a payline. That's about it. While some base games can have some modifiers and extra features, mostly it's a simple case of landing the matching symbols. 

But to make the slots more fun, profitable and action-packed, the game developers come up with the attractive bonus and free spins rounds and modes that can help you win more and add more thrill to the gameplay. Usually, the bonus rounds and free spins modes will be activated by some sort of a special wild, scatter or bonus symbol combos and will run for a certain number of spins.

Quite often a player will be taken to a separate or modified screen and you might have to perform different actions, make choices, etc. in order to win the bonus round. There are different kinds of bonus games, some more advanced and interactive than others, and we will come across a few different ones in this article. 

£ 100 bonus on first deposit 120 bonus spins. 18+ New Customers only. 20 no deposit free spins available on Book of Dead game only. Must be claimed on the 'My Offers' page within 14 days of sign-up. Free Spins have a £0.10 value each and expire 7 days from claim. 35x wagering requirement on eligible slots before winnings are converted to cash. Select Casino offer on sign-up and deposit. 4 deposits of £10, £20, £50, £100 matched with a bonus cash offer of same value (14 day expiry). 35x real money cash wagering (within 30 days) on eligible games before bonus cash is credited. Spins credited upon deposits; under £50 =10 Spins, £50 or over =25 Spins; on Book of Dead only (3 day expiry, winnings paid in cash).

Different free spins modes

In most cases, the free spins round is activated by landing at least three scatter symbols. However, there could be other ways of triggering it. Once the free spins round starts, you will receive a certain number of free spins, which means that the reels spin for a while without you paying anything per spin. 

The number of free spins that you receive can range anywhere from 5 to 100, but most slots offer on average 10-30 free spins. All online casino players absolutely adore the free spins mode since this is your opportunity to get some extra winning without the extra pay. 

What you can win varies a lot as well because some games might have extra features such as multipliers, modifiers and wilds helping you to win more during the free spins round. There are also slot games where you can choose or be randomly assigned one of the few different free spins mode options with different rules and payouts. 

Slots with Click and win or Pick and Win bonus games

This is another category of the bonus game which is quite popular, and the players are expected to pick and choose different items from a large selection to win cash prizes and multipliers, or of course, you can be unlucky and choose "end of the feature" item.

Play Mega Fortune slot at Casumo Casino


Slots with Bonus Wheels 

These are simply great and mostly associated with high-level progressive jackpots. When you hit the Bonus Wheel, it normally offers multiple sections of cash prizes, empty/lose items as well as arrows leading to the next level with bigger prizes and the final level with the ultimate massive progressive jackpot.   

So let's have a look at a few of our slot picks with all those cool bonus features. 

£ 100 bonus on first deposit and 120 free spins on first deposit. New customers only. Minimum deposit: £20. 20 spins in Book of Dead on reg. 100% bonus up to £100 and 100 bonus spins. First 50 bonus spins credited on deposit, Second 50 bonus spins credited the following day. Wagering on reload bonus: 60x. Wagering on bonus spins: 30x. Wagering must be completed within 30 days. Max bonus bet £5. Bonus is valid for a total of 21 days.

Golden Fish Tank (Yggdrasil)

Apart from getting 3, 6 or 10 free spins depending on how many Gold Fish free spins symbols you've landed, there us a whole array of Feature Picks that come into play when you opt for the Golden Bet Mode. To select your feature picks, go through the pick and choose round, that looks like a bunch of colourful seashells and treasures at the bottom of the fish tank. The extra picks features include the following:

  • Turn one fish into a stacked wild symbol on each free spin
  • A free spin coin that awards you 2 or 4 free spins
  • One or two random wilds are added to the reels
  • High stacks of one type of fish symbols
  • Add x2 multiplier to your free spin winnings
  • Add a frozen wild symbol on the reels for the duration of free spins

Blood Suckers (NetEnt)

Blood Suckers slot


In the creepy vampire slot Blood Suckers, we really enjoy the pick and win feature called Click Me Coffin Stabbing Bonus Feature. To trigger it you need to land 3 bonus symbols. The feature is dark, scary, and full of blood and stabbing, so don't tell us we didn't warn you. You end up in a Victorian Burial Room with 12 closed coffins. Open a coffin with a vampire in it, stab it in the heart with a wooden stake and get prizes up to x203 times your bet. The empty coffin will end the feature. To make this game even better, there are free spins and an extremely high RTP rate of 98%. 

£ 100 bonus on first deposit 50 extra spins.
wager-free spins
New customers only. Min. £10 deposit. Max. bonus £100. 40x wagering requirement on bonus amount within 30 days. Bonux max bet £5. Extra spins are wager-free on Second Strike slot only. Spins paid in batches of 10/day over 5 days and expire after 24 hours.

Hugo Slot (Play'n GO)

Based on a popular Scandinavian troll character, this cute slot comes with a cool bonus game triggered by the treasure chest bonus symbol. Hugo goes to the gold mine and opens the doors in the hope to find the treasure chamber and avoid the evil Don Croco. You can win x150 your bet if you perform well. You can also receive free spins by landing the Witch scatters. This is the game where you have to choose from 3 free spins options, each one coming with the additional Hugoline scatter.

  • 5 free spins with the extra scatters paying x3 your stake
  • 10 free spins with the extra scatters paying x2 your stake
  • 15 free spins with the extra scatters paying x1 your stake

Mega Fortune (NetEnt)

One of the most popular progressive jackpots in existence Mega Fortune and the second instalment Mega Fortune Dreams both comes with the luxury theme and Bonus Wheel feature which we absolutely love because it already turned a lot of people into millionaires. 

In both games, the Fortune Wheels has 3 layers or tiers that you enter one after another in order to the biggest jackpot, which there are three in total - Rapid, Major and Mega Jackpots. The first layer has smaller cash prizes and entries to the second tier shaped as arrows. The second tier also features cash prizes, arrows to the next level and 2 Rapid Jackpot section. If you manage to get into the 3rd layer of the Fortune Wheel, you will have a chance to stop at the Major Jackpot or be lucky enough to hit the final arrow that takes you to the middle of the wheel and awards the Massive Mega Jackpot.

Bridesmaids (Microgaming)

Play Bridesmaids slot at Dunder Caisno


This game is based on a famous comedy and has so many bonus features that it's hard to count them all. There is a bonus wheel with 10 different cash prizes, 4 bonus features and one jackpot prize. Then we have the Cupcake Booster with different multipliers.  

Boutique Bonus feature lets you match Bridesmaids and win up to x66 your stake. Magic Moments Bonus feature has fun video cut-outs from the movie, and you can win up to x350 your stake. In addition to that, we have two different free spins modes: Flying High Free Spins with Rolling Reels and Growing Wilds and the second one is Friendship Free Spins with stacked symbols and special Friendship Symbol Combinations. 

200 no wagering free spins on first deposit. New UK players only. Spins only available on Starburst. Deposit and play £25 on selected games and get 25 spins OR; Deposit and play £100 on selected games and get 100 spins OR; Deposit and play £200 on selected games and get 200 spins. Spins expire after 3 days. 14 days from registration to claim offer. Players may withdraw their cash deposit or any remaining cash deposit and any cash winnings. If this is withdrawn, the spins and any winnings will be forfeited. All winnings from the spins will be paid out in cash.

Jack and the Beanstalk (NetEnt)

This is one of the mega-popular NetEnt slots based on the famous children's story. Regarding bonus features here we have the free spins round with some pretty cool extras. You get 10 free spins by landing at least 3 of the treasure chest symbols. During the whole round, you will enjoy the cool Treasure Collection Feature. Watch out for the big golden key symbol because it unlocks some nice extra wild bonuses. 3 keys unlock the stacked money bags and turn the wilds into stacked wilds. 6 keys turn the wild symbols into a full stack of three golden hens. 9 unlock the expanding golden harp wild and the entire reels go wild. 

Chibeasties 2 (Yggdrasil) 

Play Chibeasties at LeoVegas Casino


Chibeasties 2 slot takes you to the magical forest world with cute and psychedelic creatures. There is also a unique Yggdrasil’s invention called Realms.

  • Mirroring Realm – watch out for the X and Y axis that go through middle reel and middle row and creates up to 2 more wild symbols.
  • Expanding Realm – this one makes wild symbols expand and cover the whole reel giving you fully wild reels.
  • Spreading Realm provides you with wilds that can spread around creating anywhere from 1 to 4 additional wilds in any direction.
  • Teleporting Realm means that the Wild symbols can jump all over the place switching places to help you get the optimum winning combos.

What is your favourite bonus feature?

You might have noticed that it's very hard to classify and perfectly arrange the slot games according to their bonus features and/or free spins because it's a total mix of different options. But we can guarantee you that if you try playing our selected games, you will have a jolly good and profitable time. Choose the best and most generous UK online casinos to give them a spin at and you can also receive a great casino welcome bonus up to £1,500 and extra free spins too. 

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