Blobsters Clusterbuster
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Blobsters Clusterbuster
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Blobsters Clusterbuster Slot Review

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How to play Blobsters Clusterbuster mobile slot

The Blobsters Clusterbuster slot is a 9×9 cluster pay avalanching reel game by Red Tiger, which has 3 unlockable base game features and some out-of-this-world free spin bonus.

Cute little blobby aliens on a grid slot? Undoubtedly, this Blobsters Clusterbuster mobile slot is inspired by the Energoonz slot that started the grid game crazy.

Thankfully, Red Tiger Gaming gives its own twist to this well-known genre even if they keep the core of what you love: clusters of 5 or more symbols pay out, explode, and more drop-down, giving you value for money.

With its medium volatility, you get plenty of little wins as you play, which you will need. This Blobsters Clusterbuster slot is a slow burn, as you have to wake up Blobby UFO four times in a row to get the full effect of this slot game.

How to unlock the game features

You’ll notice a little 3×3 UFO sitting in the middle of the reels. You will unlock the first feature if you manage to get wins around all 8 spaces through multiple avalanches. Do it a further four times, and you’ve opened up the whole game.

  • 1st unlock: low paying symbols turn into high-paying ones
  • 2nd unlock: a frenzy of wild symbols is added
  • 3rd unlock: 3×3 super symbols are added to the reels
  • 4th unlock: Each time you activate Blobby, he now triggers 10 free spins

It’s slow going but a fun journey. The minimum bet is an affordable 0.20 a spin, so you can bet low, unlock the features, and then bet higher once you’ve unlocked all the features.

Is the Blobsters Clusterbuster slot any good?

Ultimately, you have to appreciate this Blobsters Clusterbuster online slot for what it is: a mid-variance game that gets better the more you play.

To get the 7,500x your bet max wins, you must hit the free spins and trigger blobby 3 times within the bonus – getting you up to 12x multiplier and 19 free spins.

Doing that is no easy feat, so walk away if you get anything close to 1,000x your bet; you might want to try something similar in feel – like the Game of Gladiators Uprising slot, perhaps?

Either way, this is a fun little gem that you’ll find at any good online casinos.

Game Screenshots

Blobsters Clusterbuster slot stats

Mobile Slot releasedFebruary 2023
Slot typeVideo Slot
SoftwareRed Tiger
Slot reels / paylines9 Reels / All Ways Pay
House edge / RTP4.3% / 95.7%
Slot volatilityMedium
Min/Max bet0.20 / 10
Max win7,500x
Free spinsUp to 19 Free Spins / Up to 12x Multipliers
Bonus roundsCluster Pay, Avalanching Wins, Upgrade Symbols, Wilds, Mega Symbols, Free Spins, Multiplier
Slot ThemesSci Fi
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Bonus Features

Cluster Pays and Avalanching Wins: Anytime you get a win, the symbols explode, and more symbols will drop down to give you an extra chance at wins.

Clusterbuster: You have an inactive cluster of locked tiles on each spin. Form wins next to it to unlock the tile - if you break all the outer tiles, you bust open the cluster and reveal its prize.

Feature Progress: All game features are locked, to begin with. You unlock them by activating the UFO 3x3 cluster in the middle of the reels by getting wins on all 8 positions around it. When all parts are lit up, the UFO activate to unlock the next feature in line in the following order:

  • Upgrader: Between 8 to 24 low symbols may be upgraded to random high-paying ones in the base game. In the free spins, this is 11 and 31 symbols.
  • Frenzy: Between 5 and 20 symbols may be transformed into wild symbols. Wilds will replace all other symbols on the reels.
  • Supersize: between 2 and 4 random high-paying or wild symbols, making them grow to a 3x3 super symbol.

When one of the features is unlocked, it will trigger on the next spin. After that, it will trigger randomly; more than one feature may trigger in the same spin if unlocked.

Randomly, when all but one of the lights of the ship is activated, Blobby may become enraged and light up the final light to activate the clusterbuster.

Invader Spins with Global Multiplier: Once you've unlocked the UFO features, every time you trigger Blobby, you win 10 free spins.

During the Blobsters Clusterbuster bonus game, the features trigger more often, but the wild may only appear from the frenzy feature.

The first time you activate Blobby's UFO, you'll get a 3x multiplier on all your wins. The second time gives you an x7 multiplier, and the third and final time gives you an x12. Each activation also triggers +3 spins for a potential 19 free spins.


  • Decent 7,500x bet max win
  • Free spins with up to 12x multipliers
  • Cluster pays and avalanching wins


  • Lower than we'd like 95.7% RTP

Blobsters Clusterbuster Review Conclusion

The Blobsters Clusterbuster slot on mobile is strangely compelling, mostly because the slow build-up leads to some crazy free spins.

But you do have to be willing to sit through that slow unlocking of all the features to enjoy this game truly, but the payoff is the bigger payday.

Not many medium volatility online slots give you a top win of 7,500x your bet, short of Walk of Shame by No Limit City.

The cluster pays, and avalanching reels help keep you playing, whilst the conservative max bet of 10 a spin ensures you don't go crazy with your budget. A well-balanced addition to our Red Tiger Gaming slots list.

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Review by Lucky Mobile Slots, last updated: March 2, 2023 - Rating 4

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