Bonus Rounds in Slots Explained

Patrycja Knows ins and outs of Bingo, Casino & Specials Betting
Updated Updated: 2024
bonus rounds in slots

Classical slots are mostly thrilling and fun. However, if you are looking to step up the action, then you have come to the right place. Bonus rounds on some of the best online slots could transform your experience on the reels more than you could ever imagine. 

You can attain new heights with your favourite slots by exploring the interesting features that come with the bonus rounds. Finally, you could find yourself at the brink of massive payouts on the highest RTP slots. All these give you more than enough reasons to want to understand everything about bonus rounds in slots.

What are Bonus Rounds in Slots?

Bonus games are unique features in online slots that can be unlocked from the main game. This usually occurs when multiple special symbols like scatters, appear on the screen. They may also come randomly as an extra bonus in slot games. This could be at any time and on any spin.

Bonus rounds give you a better chance of winning the game’s highest prizes. More so, you could be eligible for a special jackpot game, which could earn you a top prize at the slot. You could either play bonus rounds on the slot’s base game with the other features or separately on its own.

SmartphoneGambler dog mascot winning on a slot machine

How do They Work?

Perhaps, one of the most exciting things about bonus rounds is that they do not affect your bankroll. This means free spins for you when you trigger your bonus round. More interestingly, you get complete and 100% real wins from your bonus round play. These reasons make triggering your bonus round more than a worthy idea even though you would need a fair size of luck to win big on the reels.

Here’s how bonus rounds work:

  1. Get the required bonus symbols or scatters in the base game

  2. The bonus could trigger extra reels, free spins, or a completely different game screen

  3. Play the bonus game with the free spins given

  4. Your wins from the bonus round are added up and paid to your real money account

How to Trigger Bonus Rounds?

To start enjoying the benefits of your bonus rounds, you have to trigger them by landing special symbols known as scatters or bonus symbols. Unlocking your bonus varies from slot to slot. For some, you might need to land 3 or more scatters while others allow random triggering and retriggering to give you a second shot at winning.

With tons of UK bonus rounds available, it could be hard to determine what is best for you. Below are a few things to bear in mind when finding a slot with a good bonus round: 

  • Hit frequency: This simply tells you how realistic your chances of triggering the bonus are. A good slot should have a decent hit frequency.
  • Entertainment: The bonus round should be backed by a strong theme and huge rewards to keep you entertained.
  • Payout Potential: We all need our efforts rewarded. Games should have bonus round multipliers to boost wins.

Why is a Bonus Round Important?

“Any good casino player should take advantage of bonuses thrown their way.” The best casino players follow this quote hook, line, and sinker. Bonus rounds and their different features at slots all have one thing in common – rewarding the player with extra benefits. Here are some reasons a bonus round is important:

  • More interaction: Bonus rounds give players added interaction with the gameplay at slots. With better graphics, visuals, and sound effects, players interact with the slot better than ever.
  • Potential for more money: Bonus rounds give players a better shot at increasing their bankroll by hitting the right winning combos. Some even go as far as offering guaranteed prizes.
  • More entertainment: Bonus rounds add more fun elements to the base game at slots. If you are looking for more action on your favourite slots, bonus rounds are a great option for you. 

Top 10 Slots with Bonus Rounds in the UK

Our casino experts have put together a list of the best slots with bonus rounds in the UK. You can play any of these slots right now. Enjoy!

Top slots with bonus rounds Bonus features
Foxpot Win Multipliers, Nudge Feature, Fox Wheel
Deadwood Shoot Out Feature, Shot Out Free Spins, Free Spins, stacked symbols, xNudge Feature
Wheel of Fortune Megaways Free Spins, Wild Megastacks, Extending Reels
Immortal Romance Rolling reels, multipliers, free spins
Game of Thrones Free spins, multiplier, gamble feature
Starburst Free spins, “both ways” mechanic
Thunderstruck 2 Wilds, Wild Storms, 4 Free Spins Options, Multipliers
Gonzo’s Quest (Free Fall) Avalanche feature, Multipliers
Rome: The Golden Age Free Spins, Progressive Multipliers, Sticky Symbols
Betty, Boris and Boo Sticky Wilds, Expanding Symbols, Free Spins and Multipliers

1. Foxpot 


Microgaming produced this slot as a typical example of a slot loaded with bonus features and rounds. The most prized asset is the Fox Wheel and its three sections – the multiplier wheel, the money wheel, and the respin wheel. Once you spin this, you could hit any of the game’s three massive jackpots.

2. Deadwood

deadwood slot

In Nolimit City’s fast-paced Deadwood, head out to the old Wild West in pursuit of some prizes. In the base game, stacked nudge wilds combine with a progressive multiplier to increase the win possibilities. With so many options in the free spins round, including sticky multipliers, you’ll need to strike a balance between risk and reward to come out on top.

3. Wheel of Fortune Megaways

wheel of fortune slot

If you appreciate the television game show, you’ll love Big Time Gaming and IGT’s Wheel of Fortune Megaways slot. There are some interesting ‘extending reels’ in this huge free spins bonus round. Each reel can have a maximum of ten symbols on it. When this function is activated, the Megaways mechanic can be increased to a maximum of 1,000,000. Yes, there are a million different methods to win, which is something unique.

4. Immortal Romance (Chamber of Spins)

immortal romance slot

In this Microgaming slot, you can uncover the dark secrets of vampires. Players who uncover the Chamber of Spins will discover a rewarding secret. During the normal gameplay, Wild Desire can fill up to five reels with wild symbols at random, resulting in massive wins.

The Chamber of Spins is unlocked when you get three or more scatter symbols, and it can be retriggered while you play. The more you trigger the bonus, the better your prize. Each of the four characters has unique skills, such as rolling reels or multipliers that can increase your stake by thousands of times.

5. Game of Thrones (Free Spins)

game of thrones slot

This 243-ways-to-win video slot from Microgaming boasts a trendy theme and a lovely theme song. The Iron Throne is your scatter symbol, and three of these will award you with free spins. Then, you select a house, each has its own set of bonuses.

Make use of the bonuses to help your horse win and take the throne. With three scatters, the free spins can be retriggered. An extra  Gamble feature adds to the excitement, with four stages offering lucrative prizes.

6. Starburst (Starburst Wilds)

starburst slot

NetEnt produced this low-volatility game with colourful symbols and huge prizes. Although it only has one bonus feature, its small and consistent rewards make it more desirable. Starburst has 10 paylines and the Wilds trigger when a wild symbol lands on reels 2, 3, and 4. The entire reel covers and produces a winning combo and a respin follow. This makes it possible to even win up to 500x your stake.

7. Thunderstruck 2

This is another epic from Microgaming. The might of the Norse gods resounding through your screen is every bit palpable. The slot’s multifaceted Hall of Spins is its biggest feature and it contains four different sub-features within it. That’s not all, a massive bonus round with the oncoming Wild Storm feature can turn up as many as five reels completely wild for an outrageous winning potential.

8. Gonzo’s Quest (Free Fall) 

gonzos quest slot

NetEnt explores the golden city of Eldorado with this slot. Blocks of different colours fall from the sky to fill in the reels. They explode whenever you win and this could be up to 2,500x your stake with blue blocks. The Avalanche feature is your first bonus. Also, after landing three gold scatters, the door opens and Gonzo walks into the city. The Free Fall feature serves as free spins and players can get ten spins for each bet line containing three scatters. 

9. Rome: The Golden Age

Rome: The Golden Age slot

You will find as much as a 1,000x multiplier that can be triggered in the base game. When you land sticky Rome symbols in the free spins round you will receive prizes in the unlocked position. This prize could be as little as 1x or up to 50x your bet random prize. Afterwards, you can reset the spins.

10. Betty, Boris and Boo

Betty, Boris and Boo

Betty, Boris, and Boo is a 5 reel, 30 payline game from Red Tiger Gaming. This eccentric ghost-themed slot has a free spins bonus round that comes with 10 spins for a start. The bonus round features expanding symbols, sticky wilds, and a 10x multiplier. To win, you have to land 3 or more matching symbols (or just 2 skulls) or wilds on a payline from left to right, starting from the first reel.


Bonus rounds in slots come in different forms but their ultimate aim is to add more thrill and fun to your gaming experience at the casino. By now, you would be familiar with bonus rounds, their importance, and some of the best slots for them. You will also find diverse slots with different themes and unique gameplay, which you can leverage. Take a look at our casino’s resources for more information.

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