How do wins work in Reactoonz?

You need 5 or more matching symbols in a cluster that touch horizontally and/or vertically on the 7x7 grid. Winning symbols are removed and new ones drop in, and the game cascades until there are no new wins.

Does Reactoonz have free spins or a bonus buy?

No. The rules list no free spins round and the demo has no buy feature. The features are the Quantum Leap charger, Fluctuation, Giantoonz, Instability and the Gargantoon, all inside the normal round.

How do you trigger the Gargantoon?

A Quantum feature is queued each time you win on 25 symbols. After 4 features are queued, charging a fifth time adds the Gargantoon, a 3x3 wild that splits into two 2x2 wilds and then nine 1x1 wilds.

When 4 matching normal symbols sit together in a square, they merge into a 2x2 Giantoon. Any winning combination that includes a Giantoon pays double.

What is the highest paying symbol?

The pink two-eyed alien. A cluster of 15 or more pays 750 times the bet, according to the paytable.

What bets does the Reactoonz demo allow?

In our demo the bet ran from 0.20 to 100.00 per round.

Reactoonz Guide: Rules, Quantum Features, Gargantoon and Giantoonz

By the CasinoDemo editorial team · Updated 2026-11-09 · How we review

Reactoonz is a Play'n GO cluster slot on a 7x7 grid where little aliens drop in, pop when five or more touch, and feed a charger that adds random grid-changing features. There are no free spins and no bonus buy. Everything happens inside one cascading round.

We read every rules page in the demo and played 25 rounds at a 1.00 bet to see how the Quantum Leap meter, Fluctuation wilds and Giantoonz behave in practice. Here is how it all fits together.

Play Reactoonz demo for free

Reactoonz at a glance

Provider: Play'n GO
Demo: Free, no sign-up

How Reactoonz works

The game rules call Reactoonz a cascading game played on a 7x7 grid. Wins need 5 or more matching symbols in a cluster that touch horizontally and/or vertically. Diagonals do not count. Only the highest win is paid per winning cluster, and wins from several clusters in one round are added together.

Winning symbols are removed and new ones drop in from above to fill the gaps. The game keeps cascading until no new winning combinations can be created, and all wins are paid out at the end of the round. The bet cannot be changed while a round is running.

In our demo the bet buttons went from 0.20 up to 100.00 per round, with steps such as 0.60, 1.00, 1.60, 30.00 and 75.00 along the way. The demo shows plain credits with no currency sign and starts you on a 25,000 balance.

Reactoonz base game showing the 7x7 grid of alien symbols, the Quantum Leap charger and the Gargantoon tank — The 7x7 grid with the charger top right and the Gargantoon below it

Symbols and paytable

There are eight paying aliens: four two-eyed characters (pink, green, orange and blue) and four one-eyed ones (purple, red, green and yellow). Pays scale with cluster size from 5 up to 15 or more symbols. At a 1.00 bet the paytable reads directly as multiples of the bet.

The pink alien is the top symbol: 1x for 5, 5x for 8, 20x for 10 or more, 50x for 12 or more and 750x for 15 or more. The green two-eyed alien pays up to 300x, the orange one up to 150x and the blue one up to 75x for 15 or more. The one-eyed symbols are much smaller: purple and red top out at 10x and the small green and yellow ones at 3x, with a 5-cluster of those last two paying only 0.10x.

That gap matters. Most of the game's value sits in big clusters of two-eyed aliens, which is exactly what the features below try to build.

Reactoonz paytable showing pays for 5 to 15+ symbol clusters for all eight alien symbols — Paytable at a 1.00 bet: the pink alien pays 750 for a 15+ cluster

Wilds, Fluctuation and Giantoonz

Wilds substitute for all normal symbols, but the rules state they can only appear as part of Fluctuation and Quantum features. They never land on their own.

Fluctuation: in each spin one random one-eyed symbol type is marked as the fluctuating symbol. If any marked symbols are part of a winning combination, they leave 2 wild symbols behind once they are removed. This is the most common way to get wilds, and we saw it several times in 25 rounds.

Giantoonz: 4 matching normal symbols adjacent to each other in a square shape automatically form a Giantoon, a 2x2 version of that alien. Wins are doubled in any winning combination that a Giantoon is part of. We formed Giantoonz from both one-eyed and two-eyed aliens during our session.

Reactoonz demo round with a red one-eyed Giantoon marked x2 and a group of glowing wild symbols left by Fluctuation — A x2 Giantoon and a cluster of Fluctuation wilds in one of our rounds

Reactoonz rules page explaining Giantoonz doubling wins and Fluctuation symbols leaving 2 wilds — Rules page for Giantoonz and Fluctuation

Quantum Leap and the four Quantum features

The Quantum Leap charger on the right charges up when you win. A random Quantum feature is added to the queue after winning on 25 symbols, and up to 4 Quantum features can be queued. When no more wins are present, the queued features trigger. The round only ends when every queued feature has fired and there are no more winning combinations, and charge meters reset only at the end of the round.

The four features are:

Implosion transforms 3 to 6 symbols into wild symbols while also destroying all adjacent symbols.

Incision cuts a wild symbol into the centre of the grid and creates two intersecting diagonal lines through it. Both lines show the same random symbol.

Demolition destroys all one-eyed symbols and all matching symbols, which clears the low payers out of the way.

Alteration picks 1 random one-eyed symbol and turns all matching symbols into another symbol. If there are no one-eyed symbols on the grid, it can choose any available symbol.

Wild symbols are not affected by Quantum features. In our session the charger filled a feature slot a few times; our best round, a 1.40 win at a 1.00 bet (1.4x), came from a cascade that charged the meter mid-round.

Reactoonz cascade in progress with winning symbols exploding and the Quantum Leap charger lighting up, win of 1.40 — Our best demo round: 1.40 at a 1.00 bet

Reactoonz rules page describing the Implosion, Incision, Demolition and Alteration Quantum features — The four Quantum features

Reactoonz Quantum Leap rules: a feature is queued after winning on 25 symbols, up to 4 can be queued — How the Quantum Leap charger works

The Gargantoon and Instability

Charging the meter a fifth time adds the Gargantoon feature. The Gargantoon first adds a 3x3 wild symbol to the grid at a random position. If no more cascades are possible, it becomes two 2x2 wild symbols, and finally nine individual 1x1 wilds. New symbols drop down from the top to fill the grid before each move. This is the feature that can produce the biggest rounds, because it keeps putting wilds into fresh grids.

Instability is the Gargantoon's other job: on any initial non-winning spin, there is a chance it drops 4 to 8 wild symbols onto the grid. We did not see the Gargantoon or Instability in our 25 rounds, so we can only describe them from the rules.

Reactoonz rules page for the Gargantoon 3x3 wild and the Instability feature that drops 4 to 8 wilds — Gargantoon and Instability rules

RTP, max win and what our demo session showed

The demo's rules and help screens did not display an RTP figure or a maximum win, so we are not quoting one here. Check the game's info page at your casino before playing for real money, since Play'n GO lets operators run different RTP settings.

Over 25 rounds at a 1.00 bet our balance went from 25,000 to 24,983.10, a net loss of 16.90 credits. Most rounds paid nothing or small amounts, a couple crept past 1.00 (one paid 1.15), and the best single round paid 1.40. That is one short session, not an average, but it fits the paytable: one-eyed clusters return pocket change and the game leans on long cascades and the Gargantoon for its real payouts.

There is no bonus buy and no free spins round, so you cannot pay to skip ahead. Every feature has to come out of normal play.

Our verdict

Reactoonz is a smart design: one cascading round with a charger, four Quantum features and the Gargantoon stacked on top. It also explains why the base game can feel quiet. Small one-eyed clusters pay very little, and the excitement depends on wins chaining long enough to fill the meter. Without a bonus buy you have to be patient. The demo is a good way to learn how Fluctuation wilds and the Quantum queue interact before you think about real stakes.

How to play Reactoonz free in Canada

Press Play demo for free on the game page and the Play'n GO demo loads with virtual credits. There is nothing to download, no account to create and no deposit to make, and it works in your browser on desktop and mobile.

Use the demo to see how the bonus round plays out and whether the game's pace suits you.

Playing Reactoonz for real money in Canada

Real-money online gambling in Canada is regulated province by province. Ontario runs a regulated market where licensed operators are overseen by iGaming Ontario and the AGCO; other provinces offer play through their own provincial sites, such as PlayNow (British Columbia, Manitoba and Saskatchewan), Loto-Québec, PlayAlberta and ALC in Atlantic Canada.

The legal age is 19 in most provinces and 18 in Alberta, Manitoba and Quebec. Only play at sites licensed where you live, set limits before you start, and treat gambling as entertainment, never as a way to make money.

Reactoonz FAQ

How do wins work in Reactoonz?: You need 5 or more matching symbols in a cluster that touch horizontally and/or vertically on the 7x7 grid. Winning symbols are removed and new ones drop in, and the game cascades until there are no new wins.
Does Reactoonz have free spins or a bonus buy?: No. The rules list no free spins round and the demo has no buy feature. The features are the Quantum Leap charger, Fluctuation, Giantoonz, Instability and the Gargantoon, all inside the normal round.
How do you trigger the Gargantoon?: A Quantum feature is queued each time you win on 25 symbols. After 4 features are queued, charging a fifth time adds the Gargantoon, a 3x3 wild that splits into two 2x2 wilds and then nine 1x1 wilds.
What are Giantoonz?: When 4 matching normal symbols sit together in a square, they merge into a 2x2 Giantoon. Any winning combination that includes a Giantoon pays double.
What is the highest paying symbol?: The pink two-eyed alien. A cluster of 15 or more pays 750 times the bet, according to the paytable.
What bets does the Reactoonz demo allow?: In our demo the bet ran from 0.20 to 100.00 per round.

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