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Cluster Tumble (Relax Gaming) – Demo Mode
Cluster Tumble Slot Review
Casumo Casinohas added a new Relax Gaming slot to their casino, released on the 3rd of November 2021. The aptly named Cluster Tumble slot is the 5th release in the “Tumble Series” of machines from Relax Gaming and sees the intrepid female explorer on a mission to rescue her husband and collect a few riches on the way.
As you would expect from the game title, this slot focuses heavily on the Cluster Pays format, followed by Tumbling Reels for new wins. If we were scoring game titles, this release wouldn’t be scoring very highly for originality.
Gameplay takes place on an 8×8 grid but with a limited number of starting symbols present in the middle of the grid. You need to create wins to break blocks to expand the playable grid area and reveal any special feature symbols.
Cluster Tumble is another high variance, and volatile slot from Relax, with a volatility rating of (5/5) with max wins capped at 20,000x stake.
We have included the free to play demo version above, including the bonus buy options (normal and volatile). Test this slot out for free and get a quick understanding of how the free spins round works and the potential this slot has to offer!
Cluster Tumbles Slot – Base Gameplay
The base gameplay on Cluster Tumbles is an unusual one but also quite simple to sit back and watch the action and consecutive wins unfold.
Gameplay takes place on an 8×8. On each spin, there is a random number of starting active pay symbols on each spin. These appear in the centre of the grid. Clusters of matching symbols are required to form wins that can include Wilds.
Wins must be formed to destroy all the surrounding blocks. This increases the number of active symbols in play thanks to the tumbling reels and may unlock some of the unique feature symbols that are present but not currently activated.
Base Game Features
Both the Lightning Win and Fire Transform features can help quickly destroy many of these blocker symbols, giving you a better chance of scoring additional wins or even fully clearing the grid!
The main bonus round can be triggered in 2 different ways. Firstly, regular scatter symbols are present on the reels, and three are required to activate the free spins feature. The alternate bonus trigger occurs if you manage to destroy all of the blocks on the grid in the base game.
The Scatter Symbol in Cluster Tumble is a special symbol required for triggering the main bonus round. Three are needed in total to trigger the bonus round. These could appear in a single spin if extremely lucky but most likely will drop into the grid after successive wins, which have destroyed more blocks and cleared out the grid.
The alternate method of triggering the bound round is by clearing the grid completely of the blocking symbols. Once the grid is completely cleared of blockers, the bonus will trigger!
Cluster Tumble Scatter Symbol
The Wild symbol substitutes for all normal symbols, just as a regular wild would on any slot. The key addition on this machine is the number attached to the wild symbol, this reflects the “lives” or number of wins this wild can contribute to before being completely destroyed.
In essence, these wilds act almost like semi-sticky wilds for a specific number of wins.
Cluster Tumble Wild Symbol
Lightning Win Feature
Once activated, the Lightning Win symbol is replaced by a target symbol which will be one of the regular symbols on the grid.
This feature will activate on the subsequent cascade after being revealed. All normal symbols of the same kind as the target symbol including any Wilds form a win regardless of their position.
In essence, this ignores the cluster pays requirements temporarily and pays in an almost scatter like fashion.
Lightning Win Symbol
Fire Transform Feature
Once the Fire Transform symbol becomes activated, this unique block is replaced by a target symbol, one of the regular symbols in play.
On the following cascade, 1-2 symbols are selected and transformed into the same symbol as the target symbol.
Cluster Pays are still required to form wins here, but there can be multiple interactions from the Fire Transform and Lightning Win features.
Fire Transform Symbol
The free spins round is triggered by landing 3 Scatters or by clearing out the Grid completely.
You are awarded a starting five free spins on triggering this feature, landing any further Scatter symbols during the Free Spins awards one additional spin each time.
The critical feature in this bonus round is to remove all stones from the Grid as this not only awards three additional spins but a multiplier of 3x is awarded and remains active for the entire bonus round.
Repeating the grid clearing is, in essence, almost like a mini-bonus re-trigger awarding a 3x Multiplier each time and three more free spins (First removal grants Multiplier 3x, next one gives 6x, 9x etc.).
Once any multiplier is awarded, it activates immediately and stays active for the remainder of the bonus round.
For players from countries where still allowed, there is a bonus buy feature enabling you to trigger the Free Spins Round instantly at a cost dependant on the current bet level.
There are two different Bonus Buy options on offer, regular free spins trigger for 100x bet, or you can opt for an even more Volatile Free Spins option that costs 200x stake.
The critical difference to the volatile option is that the multipliers, when awarded, start at 6x and increase to 12x, 18x on any further grid clears. Double the cost for double the multiplier values.
There are also some minimal differences in the slots RTP when using these features, with values of 96.48% Bonus Buy (100x) 96.57% Bonus Buy (200x), respectively.
The game has a stated hit frequency of 20.29% or just over 1 in every five spins. This is quite low for an online slot in general, but given the tumbling reels and cluster pays systems the subsequent wins that can be achieved from a single spin makes this figure tolerable.
Cluster Tumble has the following listed hit frequencies during regular play, with different win animations assigned for specific win levels!
The theoretical maximum win for the Cluster Tumble Slot is 20,000x stake. This is a hard-capped win limit applied to this slot, given the rising multipliers and huge cluster pays this is most likely attained during the free spins round where the multiplier value has been raised several times.
Cluster Tumble Slot Review
Cluster Tumble Final Opinions
Cluster Tumble is a great addition to the Tumble Series of slots from Relax Gaming. The production value on this machine is very high quality, with superb intro and cut scene animations that really help with the overall feel whilst playing. Everything about this machine is slick and well to impressive, exploding symbols to smile-inducing Big Win animations.
Make no mistakes; this is a volatile beast, primarily down to the very low hit frequency in general play. Bet accordingly, or you will get demolished by the dead spins whilst hunting for a bonus trigger. Once the bonus round does arrive, you can expect more volatility and teasing as blocks are cleared out, special features trigger, and a wealth of explosions occur as you approach fully unlocking the grid.
The multipliers in the bonus round have a massive effect on the overall wins. They are a crucial feature to unlock as early as possible (clearing the grid). For the most significant wins, this has to be repeated a few times too, or you get even luckier and hit a massive cluster of premium symbols.
The minimal starting symbols in play and limited starting free spins in the bonus round mean you should expect some very disappointing bonus round. It does only take one or two delicious spins to achieve huge wins on this machine. Still, dead spins, unfortunately, are almost a given on this slot. Gaining multipliers and extra spins help alleviate this but expect some mediocre bonuses before seeing the full magic of this machine.
Whilst there doesn’t seem to be a massive amount of innovation based on all of the other previous Tumble themed slots, the overall polish and slick gameplay on this means it is well worth checking out if this type of puzzle-style grid slot usually appeals.
Looking for other great casinos where you can play Cluster Tumble Slot? Below is an excellent selection of some of our favourite casinos that we have already checked have a full range of Relax Gaming slots available for you to play.