Cluster Tumble Slot Review

Slot Provider: Relax Gaming

RTP: 96.4% | Variance: High | Maximum Win: 20,000x

Our Score: 8.4

WHY YOU CAN TRUST THIS REVIEW: The information and opinions on this page are the result of an comprehensive process of information gathering and live game testing by the gambling experts who work at allslotsites.com. Find out more here.

About Cluster Tumble

Reviewed by: Mark Wadie

Published Date: 27th October 2021

How We Review Slot Games

We test and rate all slot games across 5 criteria, assigning a score out of 10 for each and an overall score that is an average of the 5. To build an accurate assessment of each game we gather information from the supplier and play in real play or demo mode. Find out more.

Cluster Tumble is a very popular cluster pays slot with an adventure theme from Relax Gaming. It uses a cascade mechanic to remove stone blocks from an 8×8 grid with each successive win. If you can clear the grid entirely then you’ll trigger a free spins round with progressive multipliers. This volatile slot has a 20,000x max win and spins start at 10p.

Cluster Tumble Game Information

Release Date: 03.11.21
RTP: 96.4%
Variance: High
Maximum Win: 20,000x
Progressive Jackpot: No

Reels: 8
Rows: 8
Paylines: Cluster Pays
Minimum Stake: £0.10

Theme: Adventure
Features: Cascading Wins, Wilds, Transforming Symbols, Multipliers, Free Spins
Format: Cluster Pays

Testing Notes: Here’s What Happened When We Played Cluster Tumble

IMPORTANT: To give you an accurate assessment of the games we review our writers play 200 spins. Whilst this is a useful tool to help us review games and to give an example of what might happen when you play, keep in mind that 200 spins is only a very small sample and cannot be used to accurately predict what might happen over another 200 spins. The outcome of all slots play is always random.

Boom Or Bust? Our Session By The Numbers

Test spins and results analysis by Mark Wadie.

Results from 100 spins with real money on Cluster Tumble at Casumo.

Stake Size: £0.1
Start balance: £976.35
End balance: £1,031.79
Hit Rate: 22% (22 winning spins in 100)
Biggest Win: 523.5x
Free Spins Round: 2

If you’ve ever got on a winnings streak with a game like Cluster Tumble then you’ll know what a satisfying experience it can be watching clusters appear then break apart, then new ones form and wilds and Lighting Win symbols come into the mix to cause more wins across the grid. I was lucky enough to see two big sequences like this in a short session of only 100 spins. That is very unusual for a volatile slot like this one but it shows what can happen when things go your way.

6x Multiplier in Free Spin — A 6x multiplier comes into play in free spins round

How did it happen? I cleared the grid twice. The first time producing a win of 81.7x in the subsequent free spins round. But it was the second round that went off in a big way, eventually resulting in a 523.5x win. In this case the grid cleared twice again to extend the round to 15 spins and bring in a 6x multiplier. The wilds will play a big part in any big win you see, particularly as they have multiple lives and stick around to help build more clusters. And the Lighting Win symbols, explained below, were also powerful in extending each win sequence.

Cluster Tumble Big Win — A 523x win from free spins (10p stake)

Of course, wins like this are rare, but they are what makes Cluster Tumble so popular.

What We Liked

High quality production with great artwork
Exciting goal of unlocking the entire grid to trigger free spins
Big top payout of 20,000x
Wilds have up to 5 lives
RTP of 96.4%

What We Didn't like

Very volatile and can be a tough play

Cluster Tumble Review Scores

Theme and Design 9
RTP and Variance 8
Maximum Win 8
Symbols and Paytable 8
Features and Gameplay 9

What Our Reviewer Says ...

"A fantastic cluster pays creation from Relax Gaming with a tough maths model but stunning results when things finally drop your way!"

Overall Score: 8.4

Theme & Design

Our Score 9

Help Rescue An Intrepid Explorer From a Mountain Temple

This is a true adventure slot with a cool back story and fantastic production. Cluster Tumble is based amidst a kind-of Himalayan backdrop with one explorer gone missing and his equally gung-ho wife on the chase to find out what has happened to him. You’ll get all that from the intro video.

Cluster Tumble by Relax Gaming — Cluster Tumble – set in a mountain top temple

The game action unfolds in Mayan-style temple with lots of weird looking masks and carvings building an eerie atmosphere. The surroundings also feature gold statues to the sides of the screen and skulls strewn on the ground. Despite the dramatic storyline the initial vibe once you start playing is very chilled with a relaxing soundtrack to accompany your spins. If you clear the board and enter the free spins round the action takes you inside the underground part of the temple where the lost explorer can be seen, caged-up for some reason. When the round ends they head off together, clutching a pile of treasures.

It’s a neat story and a quality production.

RTP and Variance

Our Score 8

What is RTP?

RTP (Return to Player) refers to the amount a game will pay out in cash prizes expressed as a percentage of all the money wagered on that game. For example, a 96% RTP means a game will pay out £96 for every £100 wagered. This is an average number and will vary from one session to the next. Read more here.

What is Variance?

Variance refers to how far a game will deviate from its RTP over time. High variance games deviate a lot and produce uneven win distributions and unexpected windfalls. Low variance games provide a more stable and even distribution of wins. Read more here.

The base game RTP rate for this slot is 96.4% but that figure can rise to 96.57% during the uber-volatile Free Spins round. And for those interested in the stats side of things, Relax also advertise the hit frequency of the game as 20.29% which means you should hit a win roughly once every 5 spins.

The volatility of the game is very high so it will likely produce a very uneven win distribution. That means it can burn down your balance fast at times so choose your stake setting with care.

Maximum Win

Our Score 8

What Is Maximum Win?

Maximum win refers to the maximum amount a player can win from one spin. It is expressed as a multiple of the stake. For example, where the maximum win is 100,000x, from a £1 stake, the maximum win would be £100,000.

The max payout from one spin in Cluster Tumble is 20,000x. That’s good potential. You can find even better from the same provider in our list of Relax slots with highest max wins.

Symbols and Paytable

Our Score 8

The game plays on an 8×8 grid and pays out for ‘clusters’ of 4 or more identical symbols that land in adjacent positions horizontally or vertically. You can build huge clusters of 40 or more pay symbols for big wins.

Cluster Tumble Paytable — The paytable with 2,000x for 40 or more red masks

There are just six symbols in the table. They are three gems – blue, green and red – valued at from 0.3x for 4 blue up to 50x for 40 or more red; and a blue mask, a scarab beetle and a red mask, valued at from 0.4x for 3 blue masks up to 2,000x for 40 or more red masks!

There is also a wild, represented by the letter W, that substitutes for any pay symbol to complete a cluster.

Features and Gameplay

Our Score 9

Stone Blocks, Cluster Pays and Cascades

Cluster Tumble is not quite like other cluster pays slots. When the game starts you’ll notice that only 10 to 15 positions on the grid have pay symbols on them. The rest are taken up by stone blocks. These stone blocks are removed when symbols in clusters appear in positions next to them.

A Cascade in Cluster Tumble — Winning symbols explode off the grid

And, when clusters form, a cascade is triggered, which means symbols in the cluster explode off the grid and ones above drop down to fill the spaces. New symbols also drop in from above to fill the remaining empty spaces. If more clusters are formed, the process repeats, and any stone blocks appearing next to new clusters are removed as well.

Gradually, with each successive cascade, more of the grid opens up. The aim of the game is to remove ALL stone blocks from the grid. When you do, then the free spins round is triggered.

As well as those cascades, you also have some nifty modifiers to help you. These appear in the stone blocks and only activate when those blocks are removed. They are as follows:

Lightning Win

Stone blocks with a lightning symbol can transform into paying symbols when activated by a cluster. Now, after the next cascade, all instances of this symbol are removed from the grid whether they are in a cluster or not.

Fire Transform

Stone blocks with fire symbols can transform into a random paying symbol, with 1-2 other blocks becoming the same symbol in the next cascade to increase your chances of creating clusters.

Wilds

Stone blocks with wild symbols in them will transform into Wilds to help create clusters.

Free Spins

Clearing the grid of stone blocks triggers the free spins round. You can also trigger it by landing 3 scatters – the gold emblem. You get 5 free spins and if you can clear the board again, you’ll get another 3, plus a 3x multiplier. Do it again, and you get 3 more spins and a 6x multiplier. And so on …

Finally, if you land a scatter at any point during free spins then you will earn an extra free spin.

The Final Verdict

Cluster Tumble is an enjoyable Mayan-themed slot with an evocative atmosphere, enhanced by the intro video and back story that introduces the action. The gameplay is top class thanks to the Cluster Pays and Cascading Reels mechanics, which means you can get continuous winning streaks which unfold in smooth and dramatic fashion thanks to some superb animation by Relax’s production team. When the Multipliers are activated, this can also add up to give some serious winning potential. However, Cluster Tumble is also a highly volatile slot and it can be frustrating when clusters don’t quite land in the right place to trigger the blockers. So be ready for that maddening problem! One of the best pulls of the game is the 20,000x stake top payout, which could be yours if the Multipliers go your way during Free Spins – and you really do need those Free Spins. In summary, this slot is fun for keen explorers but prepare for a tough adventure.

Good luck!

Useful Tips When Playing Cluster Tumble

Remember, online slots are games of chance, there is NO strategy that can improve your odds of winning. However, reading our review and following these tips will help you get the most out of your time playing this slot game.

1. Choose A Low Stake

Follow our bankroll management strategy and start with low stakes relative to your balance to avoid an early exit! The minimum stake is 10p.

2. Watch For Special Symbols In Stone Blocks

Specials like the Lighting Win can really help you to clear the grid faster by removing symbols even when they are not part of a cluster.

3. Look At The Numbers On The Wild Symbols

These show how many lives a wild has left. Remember, they stay on the grid until all their lives are used up so they help from more than one cluster.

4. Play At Our Recommended Slot Sites

We have chosen the sites on this page because they all scored high in our reviews and they are licensed by the UK Gambling Commission. That makes them fair and safe places to play slots.

Who Made Cluster Tumble?

Name: Relax Gaming
Established: 2010
UK License: Remote 037462-R-319357-014
Total Games: 100 +
Known For: High variance, high max win, progressive jackpots, innovative game mechanics
Popular Slots: Money Train, Temple Tumble, Dream Drop Jackpots, Hellcatraz

Find More Relax Gaming slots

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Cluster Tumble Slot Review

About Cluster Tumble

How We Review Slot Games

Cluster Tumble Game Information

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Testing Notes: Here’s What Happened When We Played Cluster Tumble

Boom Or Bust? Our Session By The Numbers

What We Liked

What We Didn't like

Cluster Tumble Review Scores

What Our Reviewer Says ...

Theme & Design

Help Rescue An Intrepid Explorer From a Mountain Temple

RTP and Variance

What is RTP?

What is Variance?

Maximum Win

What Is Maximum Win?

Symbols and Paytable

Features and Gameplay

Stone Blocks, Cluster Pays and Cascades

Lightning Win

Fire Transform

Wilds

Free Spins

The Final Verdict

Useful Tips When Playing Cluster Tumble

1. Choose A Low Stake

2. Watch For Special Symbols In Stone Blocks

3. Look At The Numbers On The Wild Symbols

4. Play At Our Recommended Slot Sites

Who Made Cluster Tumble?

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