Table of Contents
Last Updated on May 15, 2026
If you ever thought, “Right… when does this slot get exciting?”, it means you’re ready for another level – bonus rounds slots. Instead of plain base game spinning.
Let’s be honest, a proper bonus can completely change a game. Whether it’s free spins, cascading reels, or multipliers – you name it.
Now, let’s see what the best bonus rounds slots are, as ranked by UK players right now, that we could try out too. Will also tell you everything you can expect from each game.
Best Bonus Rounds Slots at a Glance
Not sure where to start? Here are the standout bonus-round slots depending on what kind of play you want.
Highest RTP
Blood Suckers
98% RTP, low volatility, and old-school bonus features.
Biggest Max Win
Money Train 4
Up to 150,000x, but very high volatility.
Best Megaways Pick
White Rabbit Megaways
Over 200k ways to win and retriggerable free spins.
Balanced Bonus Pick
Le Bandit
Medium volatility with super cascades and free spins modes.
Which UK Slots Have the Best Bonus Rounds?
1. Gates of Olympus by Pragmatic Play
Gates of Olympus launched in 2021 and comes with an RTP of 96.5%. It is a very high-volatility slot with a max win of 5,000x.
Bonus-wise, you get scatter pays, cascading reels, random multipliers of up to 500x, free spins, cumulative multipliers, and Ante Bet.
Why it stands apart? It is one of those bonus rounds slots where the whole fun is built around multiplier action. Just remember – very high volatility means the dry patches can feel pretty brutal.
2. Sweet Bonanza by Pragmatic Play
Sweet Bonanza launched in 2019 and comes with an RTP of 96.48%. It has mid-high volatility and a max win of 21,175x.
The main bonus features include cluster pays, cascading reels, free spins with multipliers, and Ante Bet.
It is a colourful, modern, and super-popular slot for players who like bonus rounds that feel active. But yeah, that max win potential comes with extra risk.
3. Big Bass Bonanza by Pragmatic Play
Big Bass Bonanza launched in 2020 and comes with an RTP of 96.71%. It is a high-volatility slot with a max win of 2,100x.
Bonus features include money symbols, retriggerable free spins with multipliers of up to 10x, and a random dynamite feature.
This one is more straightforward than many bonus-heavy slots, which is why players keep coming back to it. Easy fishing theme, simple free spins, and nice bonus potential.
4. Dead or Alive 2 by NetEnt
Dead or Alive 2 launched in 2019 and comes with an RTP of 96.8%. It is a high-volatility slot with a max win of 111,111x.
You can expect different free spins modes, sticky wilds, and multipliers.
This is not a chill slot. It is one of those games that can go ice cold, but the possible upside is massive. Pick carefully if you don’t like long dry spells.
5. Gonzo’s Quest Megaways by Red Tiger Gaming
Gonzo’s Quest Megaways launched in 2020 and comes with an RTP of 96%. It has mid-high volatility and a max win of 21,000x.
The slot includes over 100k ways to win, avalanche feature, increasing multipliers, persistent wilds, earthquake feature, free fall bonus, and retriggerable free spins.
Basically, this is a proper bonus-round machine. If you like Megaways mechanics and features that build momentum, it makes sense.
6. The Dog House Megaways by Pragmatic Play
The Dog House Megaways launched in 2020 and comes with an RTP of 96.55%. It is a high-volatility slot with a max win of 12,305x.
Bonus features include over 100k ways to win, sticky wilds, free spins modes, and multipliers.
It is a strong option if you like free spins that can actually feel different from the base game. Still, high volatility means it won’t be kind every session.
7. Money Train 4 by Relax Gaming
Money Train 4 launched in 2023 and comes with an RTP of 96.1%. It is a very high-volatility slot with a max win of 150,000x.
The bonus side includes respins, sticky symbols, multipliers, and the Money Cart bonus with an expanding grid and modifiers.
This is the biggest max win slot on the list. But please don’t confuse that with easy wins. Money Train 4 is super-volatile, so low and steady stakes make way more sense.
8. Sugar Rush by Pragmatic Play
Sugar Rush launched in 2022 and comes with an RTP of 96.5%. It is a high-volatility slot with a max win of 5,000x.
It comes with cascading reels, multipliers of up to 128x, free spins, and sticky multipliers.
The sticky multiplier setup is the main thing here. It can make bonus rounds feel exciting, especially when the same positions keep heating up.
9. Fishin’ Frenzy Megaways by Reel Time Gaming
Fishin’ Frenzy Megaways launched in 2019 and comes with an RTP of 96.1%. It is a high-volatility slot with a max win of 10,000x.
You get over 15k ways to win, cascading reels, cash symbols, and free spins.
It keeps the familiar Fishin’ Frenzy feel but adds the Megaways setup. So, more action, more ways to win, and naturally, more volatility too.
10. Blood Suckers by NetEnt
Blood Suckers launched in 2013 and comes with an RTP of 98%. It is a low-volatility slot with a max win of 1,015x.
Bonus features include free spins, multipliers, and the Vampire bonus game.
This is the safest-feeling slot on the list. High RTP, low volatility, and old-school mechanics. It won’t give you crazy max wins, but it is a nice pick for steadier play.
11. White Rabbit Megaways by Big Time Gaming
White Rabbit Megaways launched in 2017 and comes with an RTP of 97.77%. It has mid-high volatility and a max win of 17,420x.
Bonus features include over 200k ways to win, multipliers, expanding reels, and retriggerable free spins.
It is a strong Megaways pick if you’re after bonus depth. The RTP is also pretty impressive, but don’t forget that mid-high volatility can still bite.
12. Reactoonz 2 by Play’n Go
Reactoonz 2 launched in 2020 and comes with an RTP of 96.2%. It is a high-volatility slot with a max win of 5,083x.
Bonus features include cascading reels, cluster wins, Quantometer with 4 levels, super-size wilds, multipliers, special wilds, and wild explosion.
This one is more complex, but also more fun if you enjoy feature layers. It is not just “spin and wait” – the grid keeps doing stuff.
13. Buffalo King Megaways by Pragmatic Play
Buffalo King Megaways launched in 2025 and comes with an RTP of 96.52%. It is a high-volatility slot with a max win of 5,000x.
You get over 200k ways to win, cascading reels, free spins, multipliers of up to 5x, retriggerable free spins, and Ante Bet.
It is one of the newer Megaways-style options on this list, and it gives you a pretty familiar bonus formula – just with more ways to land wins.
14. Moon Princess 100 by Play’n Go
Moon Princess 100 launched in 2022 and comes with an RTP of 96.2%. It is a high-volatility slot with a max win of 15,000x.
The bonus features include cascading wins, multipliers of up to 100x, modifiers, charge meter, and up to 100 free spins.
This is a strong pick if you like slots where the bonus can build up over time. The charge meter and modifiers add a bit more depth than plain free spins.
15. Wild West Gold Megaways by Pragmatic Play
Wild West Gold Megaways launched in 2022 and comes with an RTP of 96.44%. It is a high-volatility slot with a max win of 5,000x.
Bonus features include over 100k ways to win, multipliers, free spins, sticky wilds, and Ante Bet.
It mixes the classic Wild West Gold feel with Megaways action. Good for players who like sticky wilds and simple but potentially strong bonus rounds.
16. Wanted Dead or a Wild by Hacksaw Gaming
Wanted Dead or a Wild launched in 2021 and comes with an RTP of 96.38%. It is a high-volatility slot with a max win of 12,500x.
You can expect expanding wilds, duel multipliers, 3 bonus games with different mechanics, and sticky wilds.
This one stands out because it gives you more than one bonus style. So, depending on the feature, the session can feel very different.
17. Vikings Go Berzerk Reloaded by Yggdrasil
Vikings Go Berzerk Reloaded launched in 2021 and comes with an RTP of 96%. It has mid-high volatility and a max win of 25,000x.
Bonus features include multipliers of up to 8x, free spins, sticky wilds, special spins, bonuses, and gamble feature.
This is a good pick if you like action-heavy bonus rounds, but the gamble side means you need to stay disciplined. Don’t let the feature push you into silly choices.
18. Le Bandit by Hacksaw Gaming
Le Bandit launched in 2023 and comes with an RTP of 96.34%. It is a medium-volatility slot with a max win of 10,000x.
The game includes cluster pays, super cascades, coin multipliers, and free spins modes.
The medium volatility makes it a more balanced option compared with the wildest picks here. Still bonus-packed, but not as harsh as some very high-vol games.
19. Le Cowboy by Hacksaw Gaming
Le Cowboy launched in 2025 and comes with an RTP of 96.28%. It is a medium-volatility slot with a max win of 25,000x.
Bonus features include cluster pays, super cascades, free spins modes, and the Revolver Reveals feature.
This is another “Le” series slot with a strong bonus feel. The 25,000x max win is big, especially for a medium-volatility listing.
20. Le Pharaoh by Hacksaw Gaming
Le Pharaoh launched in 2024 and comes with an RTP of 96.18%. It is a medium-volatility slot with a max win of 15,000x.
Bonus features include sticky re-drops, multiple bonus modes, Rainbow Over the Pyramids feature, and Golden Riches feature.
It is feature-rich without going totally chaotic. Nice if you want several bonus routes but don’t want the slot to feel too messy.
21. Sweet Bonanza 2500 by Pragmatic Play
Sweet Bonanza 2500 launched in 2026 and comes with an RTP of 96.54%. It is a high-volatility slot with a max win of 25,000x.
Bonus features include free spins, multipliers of up to 2,500x, and special bets.
This is the newer and more intense Sweet Bonanza-style pick. Bigger multipliers, bigger swings, and definitely not something to treat casually.
22. Le Fisherman by Hacksaw Gaming
Le Fisherman launched in 2026 and comes with an RTP of 96.33%. It has low-mid volatility and a max win of 15,000x.
Bonus features include super cascades, special position activation, free spins modes with different mechanics, and Big Catch progress bar.
This is one of the more interesting newer picks because the volatility is not too extreme compared with many others here. The Big Catch progress bar also gives it a more goal-based feel.
23. Fiesta Clusters by BGaming
Fiesta Clusters launched in 2025 and comes with an RTP of 97%. It is a very high-volatility slot with a max win of 5,000x.
Bonus features include cluster pays, cascading wins, random multipliers of up to 256x, free spins, and Chance feature.
The RTP is strong, but the very high volatility means you should not expect smooth sailing. Great for bonus action, not great for impatient players.
24. Cygnus 5 by ELK Studios
Cygnus 5 launched in 2025 and comes with an RTP of 94%. It has mid-high volatility and a max win of 50,000x.
Bonus features include expanding grid, avalanche feature, symbol transformation, Meteor Strike feature, free spins, persistent multipliers, and X-iter feature.
This is a feature-heavy slot, but the RTP is lower than most other games on this list. So yes, the 50,000x max win looks tasty, but the return rate is something to keep in mind.
25. Gates of Olympus 1000 by Pragmatic Play
Gates of Olympus 1000 launched in 2023 and comes with an RTP of 96.5%. It is a high-volatility slot with a max win of 15,000x.
Bonus features include cascading reels, scatter pays, random multipliers of up to 1,000x, free spins, and Ante Bet.
It takes the original Gates of Olympus formula and pushes the multiplier side harder. That makes it a strong pick for players who want a more intense bonus-round experience.
Friendly advice: Pick your game based on volatility. Low volatility is better for steady, small wins and lower-risk play. High volatility is for less frequent but bigger payouts, with regular dry spells.
| Slot | Provider | RTP | Volatility | Max Win | Best For |
|---|---|---|---|---|---|
| Blood Suckers | NetEnt | 98% | Low | 1,015x | Highest RTP |
| Money Train 4 | Relax Gaming | 96.1% | Very high | 150,000x | Biggest max win |
| Dead or Alive 2 | NetEnt | 96.8% | High | 111,111x | Jackpot-style potential |
| White Rabbit Megaways | Big Time Gaming | 97.77% | Mid-high | 17,420x | Megaways bonuses |
| Sweet Bonanza | Pragmatic Play | 96.48% | Mid-high | 21,175x | Cascades and multipliers |
| Le Fisherman | Hacksaw Gaming | 96.33% | Low-mid | 15,000x | Newer balanced pick |
What Are Bonus Rounds Slots, Really?
In short, bonus rounds slots are the ones that include special in-game features besides the base game. They get triggered during base play when certain symbols land.
These can be:
- Free spins;
- Multipliers;
- Pick-and-click games;
- Respins or cascading reels;
- Mini-games or wheel spins.
Common Bonus Round Features Explained
Bonus rounds can look different from slot to slot, but most of them use one or more of these mechanics.
Free Spins
Extra spins triggered by scatters or special symbols, often with added multipliers or wilds.
Multipliers
Boost winning combinations by a set or random value, sometimes reaching huge numbers.
Cascading Reels
Winning symbols disappear and new ones drop in, creating another chance to win on the same spin.
Respins
Special symbols stay locked while the game gives extra spins to build a bigger result.
My take: What I like about these bonus features is that they entertain, but they’re far from a magic money-making button. So don’t chase ’em like crazy.
Which Bonus Round Slot Has the Highest Payout Rate?
Based on RTP – return rate – Blood Suckers seems to win first place. Not even surprised. Have you noticed its return rate of about 98%? Btw, the industry’s average is 96%.
The classy Vampire-themed slot with old-school mechanics and super-low volatility. Meaning you’ll land small wins pretty frequently. Now, while the game is packed with free spins and other nice features, don’t expect much in terms of big wins. Got it?
You can also try White Rabbit Megaways or Fiesta Clusters. But be aware of their high volatility. Now, bonuses are cool, and wins are big when they land, but you’ll be dealing with long cold streaks.
Which Bonus Round Slot Has the Biggest Possible Win?
No one tops Money Train 4, with its up to 150,000x max win. But it’s super-volatile, and you’ll spot multiple dry spells. At least, it has many bonuses, and you won’t get bored.
You might as well try Dead or Alive 2 – up to 111,111x max win – if you’re after jackpot wins. But again, very volatile.
Top tip: Better start with low stakes. And keep them steady. The key is to stay in-game for as long as possible – if you wanna get a real chance at big wins. And you can only do that by keeping stakes super-low.
Btw, if the game hasn’t paid out in a while, walk away right then.
Not sure you’ll like it, BUT – there’s no way you’ll get even closer to those max wins over casual spinning, so keep your expectations under control.
Which Slot Has the Most Frequent Bonus Rounds?
Typically, it’s medium-volatility slots and Megaways titles.
From my list, I can think of:
- Sweet Bonanza;
- Gonzo’s Quest Megaways;
- The Dog House Megaways;
- White Rabbit Megaways;
- Vikings Go Berzerk Reloaded;
- “Le” series: Le Bandit, Le Cowboy, Le Pharaoh, Le Fisherman.
Which Providers Make the Best Bonus Rounds Slots?
The most popular developers for online slots with cool bonus rounds are undoubtedly: Pragmatic Play, Play’n Go, Hacksaw Gaming, NetEnt, Big Time Gaming, and a few others.
They top any list when it comes to bonuses. So you can use this as a reference next time you’re looking for a bonus-packed slot on your own.
Do Bonus Rounds Actually Improve Your Winning Chances?
Honestly, no. They don’t technically increase your long-run winning chance. But they can make wins “feel” more frequent.
What’s actually happening is that bonuses can improve your RTP. The math stays the same. So when you’re triggering a bonus, you’re simply reaching a different part of the game, but your edge stays the same.
Reality check: Bonuses get triggered less frequently than you wish, but they have potentially bigger payouts. So yeah, it can feel like the slot has warmed up.
Can You Buy Bonus Features in the UK?
UK Reminder: Bonus Buy Is Not Available
At UK-licensed casinos, you can only trigger bonus rounds naturally through normal gameplay.
That may sound annoying, but it also helps reduce risky spending. Buying bonuses can get expensive fast, and it never guarantees a win.
No – in the UK, Bonus Buy isn’t available. You can only trigger bonuses naturally.
Tbh, almost all slots I listed earlier have a Bonus Buy feature, but since it isn’t available to UK players – no reason to mention it, right?
Now, the silver lining is that you won’t be tempted to bet more cash than you can afford. Besides, there’s no guarantee you’ll actually win something from using Bonus Buy – plus, prices are crazy high.
Where Can You Play Bonus Rounds Slots in the UK?
My advice will always be to stick to these top 20 UK online casinos:
What Else You Need to Know Before You Play?
Before You Chase a Bonus Round
Bonus rounds are fun, but they can also make players keep spinning longer than planned. Check these first:
- Set your budget before playing – not after the first cold streak.
- Use demo mode first – learn how the bonus actually works.
- Check volatility – high volatility means bigger dry spells.
- Do not chase scatters – the bonus is never “due”.
- Keep stakes low – staying in-game longer matters more than betting bigger.
- Use casino limits – deposit, loss, and time limits are there for a reason.
To wrap it up, bonus rounds slots are fun, but that’s also when things can get risky. So, before you jump into all that fun, make sure you understand that those slots are built to look exciting. Doesn’t mean they pay out the same.
You can’t imagine how often I’ve seen players turning a “tenner” into chasing one more bonus trigger.
So, before you play:
- Enjoy the bonus rounds – don’t rely on them.
- Set strict limits like you actually mean it.
- Don’t fall for “almost wins”.
- Play slots for fun – not unrealistic expectations.
- Keep it light, guys. And step away when it seems like you’re starting to chase losses.
Final advice: Use your casino’s safe gambling tools – deposit, loss, and time limits. Let them handle that part while you simply enjoy the bonus rounds.
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