Blobsters Clusterbuster

Excellent 9.1 / 10

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Blobsters Clusterbuster Free Demo Play

Blobsters Clusterbuster is an online slot from Red Tiger, the game was released in early 2023. It is the third slot in the Clusterbuster series after Dragon Clusterbuster and Good Luck Clusterbuster and reminds CorrectCasinos a bit of the merry spacemen from Reactoonz.

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Blobsters Clusterbuster - Slot Review

Blobsters Clusterbuster is a slot with high variance. You play it on a 9×9 field in which you win by making clusters of the same symbol. Using special features such as the Invader Spins, you can win back up to 7,517 times your bet in this slot. The minimum bet to play is $0.10 and per round of play you can bet up to $10.

Like almost every slot from Red Tiger, Blobsters Clusterbuster has a payout percentage of 95.70%. Will Blobsters Clusterbuster be the third successful installment in Red Tiger’s Clusterbuster series and how does the slot come out of the test? You can read about it in this review from CorrectCasinos.

Positive & Negative points of Blobsters Clusterbuster

Positive points

  • Clusterbuster concept
  • Beautiful graphics
  • Many different features
  • `Entertaining gameplay

Negative points

  • Not suitable for high rollers
  • It can take a long time to trigger Free Spins

What do you have to do in Blobsters Clusterbuster?

The name of the slot says it all and in the intro CorrectCasinos also let you know: in this slot you win not based on paylines, but by making clusters of the same symbol. A cluster in this slot consists of at least 5 of the same symbols. The place where a cluster ends up doesn’t matter, as long as the symbols end up under and/or next to each other on the field.

After starting up the slot machine you can start playing immediately. The standard bet is set at $1, but you can adjust it at any time. You can find the options for this along with the other settings under the playing area.

A total of 10 different symbols are present in the game. Of these, 9 have a paying function, with the yellow spaceman having the highest value. The symbol that remains has a special function that you need to trigger specific features in the slot.

Blobsters Clusterbuster

The features in the slot are entertaining and provide plenty of excitement in the game.

Bonus features of Blobsters Clusterbuster

In Blobsters Clusterbuster you don’t have to worry about getting bored. This is because there are more than enough features in the slot that keep the excitement high and can also provide you with great prizes. Which these are, what they do for you and how you trigger them you can read below.

Wild symbol

The special symbol in the slot is the Wild. It can replace any other symbol in the game. If one of them lands in your field, your chance of winning clusters increases significantly. The Wild can land anywhere and at any time in the field.


Every time you see a winning cluster land in your field the Tumble feature triggers. This makes sure that the winning cluster disappears from the field so that space is created for new symbols and therefore new clusters. This continues until no new cluster is created.


This game is all about the Clusterbuster. This is an inactive cluster in the middle of the field. You trigger this cluster by creating winning clusters around it. When this happens, the lights on Blobby’s UFO adjacent to the winning cluster light up.

If you manage to light up all the lights on the UFO, you trigger one of the modifiers. The nice thing about these modifiers is that after they are triggered, they can also be triggered at any time.

Comparison between the 3 Clusterbuster slots from Red Tiger

Slot nameMax. winRTPBonusBetting range
Blobsters Clusterbuster7,517x95.7%Free Spins0.10-10
Good Luck Clusterbuster19,995x95.7%Free Spins0.10-4
Dragons Clusterbuster5,250x96%Free Spins0.10-20


The first modifier you encounter with a fully green-lit UFO is the Upgrader. This changes random low value symbols into higher value symbols. Between 8 and 24 symbols are upgraded in the base game.


If Blobby’s UFO lights up pink, you trigger the Frenzy feature. In this feature, Blobby shoots 5 to 20 Wilds into the playfield, greatly increasing the chances of winning clusters and the next stage.


If you manage to make the UFO light up blue, then you trigger the Supersize feature. In this feature, extra large symbols appear in the field so your chances of winning a cluster are increased. 2 to 4 high value random symbols are popped into the field that grow into 3×3 Super Symbols. Super Symbols count as 9 regular symbols.

Invader Spins

When you have triggered all 3 bonus features, you trigger 10 Invader Spins every time all 8 lights on the UFO come on. This is a Free Spins feature where the modifiers are triggered more often.

During the feature, Blobby’s UFO can be triggered 3 times when all the lights come on. This earns you extra Free Spins as well as a multiplier that is applied to all winning clusters:

  • First UFO: 3 additional Free Spins + a multiplier of x3
  • Second UFO: 3 extra Free Spins + a multiplier of x7
  • Third UFO: 3 extra Free Spins + a multiplier of x12


Yes, when you fully illuminate the Blobby UFO for the fourth time by making clusters around it you earn 10 Free Spins in the Invader Spins feature.

The Return To Player of this slot machine is 95.70%.

None. In this slot, you win by making clusters of at least 5 of the same symbols.

Yes, in total, you can earn 9 additional Free Spins in the Invader Spins by flaring Blobby’s UFO 3 more times.

Software Red Tiger
Slot Types Megaclusters
Reels 9x9
Paylines Cluster Pays
Slot Game Features Avalanche, Cascading Symbols, Cluster Pays, Colossal Symbol, Free Spins, Game Modifiers, Scatters, Symbol upgrade, Wild Symbol
Min. Bet 0.10
Max. Bet 10
Slot Themes Aliens, Sci-fi
Slot RTP 95.7%
Blobsters Clusterbuster Slot by Red Tiger Gaming

About the author

Kate Ko

Kate Ko / Games editor

Kate joined CorrectCasinos' game team in the late 2021. She's here to find and review all new and upcoming slots titles, so you can just enjoy their free play.

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