by Play'n GO

The Reactoonz story is far from over with the Gigantoonz now firmly taking over. Gigantoonz is a Cluster Pays slot that plays on a grid of 8x8 and brings back all the favourite Reactoonz characters.

With Mega Symbols, Quantum Wilds and the Quantum Meter leading to 4 different modifiers, you'll be in for a bizarre gameplay experience that all Reactoonz fans love!

Slot information

RTP: 96.25%
Volatility: High
Max Payout: 4,000x stake
Jackpot: No
Min Bet: 0.20
Max Bet: 100.00
Category: Grid slots
Theme: Space
Series: Reactoonz
Release Date: 27th Jan 2022

Our rating

“ The Reactoonz return with a gigantic bang ”

3.9 out of 5

Win potential

Play Gigantoonz

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Gigantoonz Screenshots

Gigantoonz Features

Gigantoonz features mega symbols appearing on the reels with symbols of 2x2, 3x3, 4x4, 5x5, 6x6 and 7x7. Each of the mega symbols has a cluster value randomised up to 13. A mega symbol counts as one single symbol but the value determines the payout. Each of the mega symbols in a win leaves a wild on the grid.

During any non-winning round, 5 to 10 Quantum Wilds can be added to the reels and a Gargantoon Wilds may appear through the Quantumeter only. The wilds substitute all symbols throughout this slot.

The Quantumeter is filled up by winning symbols and mega symbols. There are 4 charge levels with Disintegration starting at 25, Metamorphosis starting at 50, Radiation starting at 75 and Gargantoonz starting at 100.

Disintegration removes all instances of 4 random symbols, Metamorphosis transforms all instances of one symbol into a different symbol, Radiation adds 1 to 4 mega symbols and 2 to 5 Quantum Wilds but the Gargantoonz feature plays out in 2 steps.

Firstly, all the mega symbols turn into Mega Gargantoonz with at least 3 appearing on the reels. Between 2 to 4 1x1 Gargantoonz appear as well. Secondly, the Mega Gargantoonz break down into 1x1 Gargantoonz that are then removed normally.

Gigantoonz - Mega Symbols

Mega Symbols

During this slot, there are mega symbols that can appear randomly on the reel sizes between 2x2 to 7x7. These have a random value of up to 13 and leave a wild on the grid when it disappears.

Gigantoonz - Quantum Meter

Quantum Meter

At the right of the screen, there's a Gargantoon sleeping above the Quantum Meter. Landing wins builds up this meter leading to features such as Disintegration, Metamorphosis, Radiator and Gargantoonz.

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Gigantoonz Slot Review

In a galaxy not too far away, The Reactoonz searched high and low finally deciding to make Earth their new home. They've had multiplier adventures in Reactoonz, Reactoonz 2 and Dr Toonz, but it's time for an even bigger one in Gigantoonz.

Developed by Play'n GO, this space slot plays on a grid of 8x8 using the Cluster Pays mechanic. Everyone's favourite aliens return with even larger creatures in this high volatility slot.


When the slot opens up, there's a goofy opening credit with the Reactoonz trying to squeeze into a spaceship. It's quite fitting for the series but reminiscent of The Minions.

As for the background of the slot, you'll find a familiar looking space background with vibrant colours followed by the different Reactoonz on the reels. It's nothing unusual or different as it feels almost identical to the other games.

Of course, these little creatures provide ambient noises that are again familiar to The Minions and this is accompanied by soft techno music providing a relaxing score.


If you've played the other games, then you'll be familiar with the format as the wins build up the Quantumeter leading to better bonuses. The slot is Cluster Pays so you'll match up symbols instead of paylines.

All the relevant menus are at the bottom of the screen with the spin button at the bottom right.

Win Potential

This is a high volatility slot leading players to larger wins but they'll occur less frequently, so we suggest you have the bankroll to sustain your gameplay. There's a respectable RTP of 96.25% that is over the average standard.

Sadly, the maximum win is quite a disappointment with a win of 4,000x your stake the biggest one available. We'd expect more from Play'n GO and the Reactoonz series - so that's something to be aware of.

Our Verdict

The presentation of this slot is loads better than Dr Toonz and feels fitting to the series. Cluster Pays and crazy aliens mixed well together and this is a winning formula from Play'n GO.

Almost everything is brilliant in this slot aside from the low maximum win - but it's still an acceptable amount. For those of you who love The Reactoonz, be sure to check out Gigantoonz.

Charlie Vogelsang
Reviewed by Charlie Vogelsang Last updated on

As the Content Manager at Slot Gods, Charlie is focused on staying on top of the latest slot releases as well as finding the most recent trends. She spends her day searching for the best slots to be reviewed as well as managing most of the content that you will find on the site. Whether it’s the latest slot review from Relax Gaming or a guide on a brand-new mechanic, Charlie will be sure to have it covered on Slot Gods.

Learn more about Charlie here

Play Gigantoonz

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