Cluster Tumble

Cluster Tumble

star-rating 2.25/5
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Leanna Madden
By Leanna Madden
5 Min Read

Set off on a wild treasure hunt courtesy of slots game developer Relax Gaming and their latest release, Cluster Tumble.

This game sees you join our mysterious heroine as you go in search of her husband, who has gone missing in the Himalayan wilderness. To spice things up along her search, she stumbles on some treasure; pretty luck, right?

This game is different from other explorer adventure slot games out there. This time we have a female adventuress instead, who looks very similar to the famous Lara Croft character. Similar to Play‘n GO’s Cat Wilde slot game, this badass character is stumbling across a game board made up of 8 rows and 8 columns.

In total, there are some 15 symbols on the board at one given time. The remainder of the board comprises stone tiles that are cracked and removed every time you hit a winning cluster, hence the name.

One thing you should definitely know about this rescue mission is that it is a highly volatile game, with an RTP of 96.40%.

Using a cluster pays system, you would require at least 4 match symbols landing vertically or horizontally to hit a win. You also have the possibility of scooping up wins of up to 20,000x your bet, which is mightily generous.

The lowest paying symbols are the coloured gems, which come in shades of green, blue and red; land 40 or more of the same coloured symbols to receive 50x your bet. On the other hand, the highest paying symbols are the scarab, the mountain lion and the mark. Hitting 40 or more of the same symbol would reward you between 100 and 2,000x your wager per line.

Along the way, you’ll land wilds, scatters, and free spins rounds which all pave the way for an epic adventure.

Short facts

  • Developer: Relax Gaming
  • RTP: 96.4%
  • Volatility/Variance: High
  • Layout: 8 x 8
  • Paylines: Cluster (4 matching symbols min.)
  • Bonus features: Wilds, Scatters, free spins bonus rounds, special stone blocks, tumble and bonus buy.
  • Bets: €0.10 to 50
  • Max wins (coins): 20,000x your bet

Cluster Tumble jackpots

You will certainly find some gems in this game, but sadly, there are no Cluster Tumble jackpots available.

Cluster Tumble free spins

If you successfully remove all the stone blocks from your reels or land three scatter symbols anywhere on the reels, you’ll activate the free spins bonus round.

You are immediately granted 5 free spins, with the chance of acquiring extra spins if you successfully clear the reels. If you do, you are bestowed with three extra spins and a multiplier of 3x.

Each time you clear the reels, your win multiplier is automatically increased by 3x. You can also receive extra spins by landing a scatter symbol.

The golden money vault acts as the game’s scatter symbol. Landing three or more of this symbol automatically activates the free spins bonus round. When this happens, you automatically bag yourself eight free spins.

Cluster Tumble bonus features

As we join the brave female explorer on her plight for her missing husband, a few features are designed to spice up your gameplay. These include:


Like all Wilds in most slot games, this symbol’s main aim is to help you create winning combinations by substituting for other symbols.


Every time you create a winning cluster, the Tumble feature is triggered. What happens is that all symbols that formed part of the winning combination disappear off the reels. New symbols fall from the top and fill the empty positions.

Any adjacent stone blocks are also destroyed in the process, making room for more symbols to fall in place.

Special Stone Blocks

There are special stone blocks that are plonked on the reels during the free spins feature. When they are placed adjacent to a win, you can enjoy some unique works, namely:

  • Wilds: Substituting for other symbols to create winning combinations
  • Lightning Win: A random symbol is assigned with a Lightning Win. When you hit a winning combo, the randomly assigned symbol plus wilds will create a win. It does not matter where they are placed, as they will still generate wins for you.
  • Fire Transform: Similar to the Lightning Win, a symbol is randomly assigned with this feature. When you hit a cluster win, one to two symbols are automatically transformed into the assigned symbol.

Bonus Buy

Want to skip the base game and go straight to the free spins feature round? Then the Bonus Buy can help you do just that. You have two options to do so:

  • 100x your wager: To trigger the free spins round and receive 5 spins with an RTP of 96.48%
  • 200x your wager: Free spins round with 5 spins awarded + the win multiplier increases twice as fast, starting at 6x. Your RTP is also boosted at 96.57%

Cluster Tumble RTP

This highly volatile slot game enjoys an RTP of 96.4%. This sum changes if you opt for the Bonus Buy feature, which would then be optimised to 96.48% and 96.57% depending on the amount wagered.


Relax Gaming is known for its highly volatile games, but they have gone all out with this one by producing a short movie sequence in the intro that is immersive. We can see the brave explorer in search of her husband as she climbs up a mountain vigorously.

The atmosphere is set with good intros, design and a soundtrack to boot. The sound effects also change within the game as the blocks fall into place. Visually, this game is very well put together.

The 20,000x stake wins are highly likely also coming from the free spins as they are boosts by multipliers as you clear the grid. The Lightning Win and the Fire Transform features are also very well received, which somehow make them more lucrative than entering the free spins bonus itself.

Cluster Pays slots are not everyone’s cup of tea, but with the added features, it is a game worth playing, even for classic slots fans.

Overall, it’s a thumbs up from us!

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