Slot
Reactoonz (Play'n GO): aliens, clusters and chain reactions
Reactoonz swaps reels and paylines for a 7x7 grid full of cartoon aliens. Wins come from clusters of matching symbols that touch horizontally or vertically, and every win clears space for new aliens to fall in. Play'n GO built the game around chain reactions: the more cascades you get in a single spin, the more its meters fill up and the more features come into play.
Key facts
- Provider
- Play'n GO
- Game type
- Slot
Cluster pays on a 7x7 grid
There are no lines in Reactoonz. A win needs a group of at least five identical aliens connected side by side or top to bottom. Winning symbols explode, the ones above drop down and new symbols fill the gaps. If that creates a new cluster the sequence continues, so one paid spin can turn into several wins.
The Quantumeter
Winning symbols charge the Quantumeter at the side of the grid. Each time it fills a level, a quantum feature fires: it can transform symbols, remove a type of alien, or add wilds to the grid. The features chain into one another, which is where the game gets its name.
Fluctometer and Gargantoon
The Fluctometer charges with each quantum feature. When it is full, the Gargantoon appears: a giant wild alien that takes up several cells, then splits into smaller wilds as cascades continue. It is the moment many players wait for, because it can keep a chain going for a long time.
Volatility and rhythm
Reactoonz is a high-volatility game. Many spins end quickly with nothing, then a single long chain delivers most of the result. It suits players who like fast, visual action; it is less suited to anyone expecting steady small wins.
On mobile
The square grid fits a phone screen well and the controls are large and simple. The cascades, meters and animations stay readable even on small devices.
FAQ
How many symbols make a win in Reactoonz?
A cluster of at least five matching aliens connected horizontally or vertically.
What is the Gargantoon?
A giant wild alien that appears when the Fluctometer is full and breaks into smaller wilds during the cascade.
Does Reactoonz have classic free spins?
Its main features are the cascades, the Quantumeter and the Gargantoon rather than a classic free spins round.
Source and last update: 2026-10-26
Mechanics from the studio’s game information; figures such as RTP are shown only with a source.