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Blobsters Clusterbuster

Review, Demo Play, Payout, Free Spins & Bonuses

Blobsters Clusterbuster is an online slot developed by Red Tiger. A 9x9 cluster pays video slot with an RTP of 95.7 per cent and low variance, this UFO-themed slots gam...e has features including cascading symbols, random wilds, and expanding symbols. 

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  • Good range of features
  • Imaginative design
  • Cascading symbols
  • Locked features incentivise longer play
  • No autoplay options
  • Cutesy characters may appeal to children

Blobsters Clusterbuster slot review

Take a look at a different slots design setup with the Blobsters Clusterbuster slot from Red Tiger. Rather than reels, this 9x9 grid uses a cluster pay system with matches formed by adjacent tiles. This is combined with a cascade style whereby winning symbols disappear to make room for further symbols. Add a range of bonus features, including extra wilds on the grid and expanding symbols, and you have an innovative take on traditional slots. Find out more in our Blobsters Clusterbuster slot review. 

UFOs too cute to fear

Red Tiger has decided to go for a cutesy, whimsical take on the theme of UFOs and outer space in this choice of slots. It looks overly appealing to children, which is not suitable for a slots game, but it does make a change from some of the more gritty themes out there amongst games at online casinos.

Design and animations

The symbols are square tile blocks with a variety of alien faces for the high-paying symbols and the standard playing cards for the low-paying. Wins involve symbols disappearing and new tiles falling, with any near the centre powering up a wheel around the central Blobster character that makes garbled noises throughout the gameplay and fires the power-ups when these are unlocked. It is still too childlike, but the character is endearing.

Soundtrack and sound effects

There is a very, very quiet synth-based soundtrack playing in the background only when spins are taking place, which doesn’t add much to the atmosphere or theme. The symbols disappear with satisfying swishing and sparkling sounds that suit the aesthetic, but there is nothing standout here. 

Blobsters Clusterbuster RTP & volatility 


This Red Tiger slot has an RTP of 95.7 per cent, which is below the average of 96 per cent for modern slots you will find at online casinos. 


Testing in demo mode suggested low volatility for this choice of slots, as smaller wins using the cluster pay system appear regularly and are often below the initial stake value. There is the chance for bigger wins, but they are much rarer and only available via the bonus features.

How to play Blobsters Clusterbuster

With a slightly different layout to some slots, follow our easy play guide and don’t get lost in space:

  1. As with all Red Tiger slots, your balance is shown to the top left and your bet level to the bottom left.
  2. Adjust the bet using the plus and minus symbols.
  3. Either the three-line menu to the top right or the ‘pays’ button to the bottom left will reveal the winning symbols and their win multiplier values. You will also find explanations of the base game and bonuses.
  4. Toggle the audio settings using the speaker icon to the top right.
  5. Trigger a spin by using the big circular arrow to the bottom right.
  6. Enjoy demo play slots responsibly by using hard win and loss limits according to a realistic budget and sticking to this throughout, quitting if the game is no longer fun. Use the timeout and/or self-exclusion functions if necessary.

How to win at Blobsters Clusterbuster

This game uses a slightly different cluster pays mechanic, which means you need to match five or more winning symbols adjacently either above or below each other. These symbols will disappear, creating space for additional symbols to drop and potentially create further wins on a single spin. Your total win will be all the matches after the cascading symbols have ceased and no more winning combinations have been formed.

Betting options

Bets are in quite a small range, starting at 0.20 and going up to 10.00 per spin.

Max win 

Red Tiger provides a max win multiplier for its slots, which in this game is 7,517.1x the bet.

Blobsters Clusterbuster bonuses 

The Blobsters Clusterbuster bonus features are what keep this game interesting, even if they encourage continuous play. Each feature is locked and requires sequential triggering:


A central 3x3 tile is blocked off by the UFO character and any winning clusters formed adjacent to this power up the lights around the character. When all these are lit, the next bonus feature in the sequence is made available for the subsequent spin.


The first bonus will upgrade low-paying symbols to high-paying ones on the reels for the turn it is activated, boosting your payout potential.


The second bonus will add additional wilds to the reels, which substitute for other winning symbols and help to form combinations.


The third bonus will turn several of the high-paying symbols or wilds on the reels into 3x3 giant symbols, which further increases the chances of cluster matches. 

Invader spins

Only once all the above features are activated will it be possible to activate the invader spins. Rather than being triggered by a scatter symbol, this is the free spins bonus of the game and ten free spins are awarded. During this round, the above features trigger more frequently and you can still light up the Clusterbuster central tile, which awards the following:

  • 1st Clusterbuster in free spins awards 3x multiplier + 3 spins
  • 2nd Clusterbuster in free spins awards 7x multiplier + 3 spins
  • 3rd Clusterbuster in free spins awards 12x multiplier + 3 spins

Blobsters Clusterbuster review: our verdict 

The theme is a little too child-friendly, which is a let-down from Red Tiger; otherwise, this is a feature-rich slots game with a variety of bonuses that keep things interesting.

Disclaimer: Blobsters Clusterbuster trademark / license is owned by Red Tiger Gaming. This site is not endorsed by Red Tiger Gaming.

Slot Data
Slot Name: Blobsters Clusterbuster
Software: Red Tiger Gaming
Paylines: 0
Reels: 0
Min Bet (all lines covered): £0.00 (GBP)
Max Bet: £0 (GBP)
Top Win: 0
UK Available in UK? Yes. Red Tiger Gaming have a UKGC license and are allowed to offer their games at UK licensed casinos.


How does the cluster pays mechanism work in the Blobsters Clusterbuster slot?

Cluster pays works by matching adjacent symbols above and below each other to achieve wins. Five or more symbols matched in this way will land a win, which will cause these symbols to disappear and create space for new symbols that can potentially enable multiple wins on a single spin.

What is the free spins bonus in the Blobsters Clusterbuster slot?

This is called invader spins and can only be unlocked after achieving the first three bonus features in the base game rather than by using a scatter symbol. You can win ten free spins with more frequent triggers of the special features; what’s more, lighting up the central 3x3 tile during the bonus will award a multiplier and an additional three spins with a potential maximum of 19 free spins.

What slots can be played after the Blobsters Clusterbuster slot?

If this game’s theme is a little too childlike for your taste, why not try something like the Peaky Blinders 2 slot? Slots with a TV or film tie-in are hugely popular here at Slots Temple and this one is a prime example from developer Pragmatic Play.

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