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Quick verdict: Reactoonz is Play’n GO’s alien cluster-pays slot on a 7×7 grid. Groups of 5 or more matching symbols win, cascades keep the action going, and a charging meter unleashes features ending in the giant Gargantoon wild. It’s highly volatile, with a 96.51% default RTP and a 4,570x top win.
Where we play Reactoonz
1win is our top-rated casino (9.9/10), with thousands of slots and a crypto withdrawal that took 15 minutes in our test.
Play at 1win18+. T&Cs apply. Not available in every country. Game libraries vary, so search the lobby for Reactoonz.
Reactoonz at a glance
| Provider | Play’n GO |
|---|---|
| Released | October 2017 |
| Layout | 7×7 grid, cluster pays (5+ touching symbols) |
| RTP | 96.51% default (lower versions exist) |
| Volatility | High |
| Bet range | $0.20 to $100 |
| Max win | 4,570x your stake |
| Key features | Quantum Leap meter, Gargantoon, Giantoonz |
18+. T&Cs apply. Check that online gambling is legal where you live.
How Reactoonz works
Symbols that touch horizontally or vertically in groups of 5 or more pay out, then disappear. New symbols drop in, and the cascade continues until there are no more wins. There are no paylines and no free spins: everything happens through cascades and features.
The features
- Quantum Leap meter: winning symbols charge the meter. Each filled segment triggers a Quantum feature: Implosion, Demolition, Incision or Alteration, which clear or change symbols to set up new wins.
- Gargantoon: filling the meter completely releases a 3×3 wild that splits into smaller wilds as it’s used.
- Giantoonz: four matching symbols in a square can merge into a 2×2 giant symbol, which counts double.
- Fluctuation and Instability: random effects that can add wilds to the grid.
RTP and volatility
The default RTP is 96.51%, but Play’n GO supplies lower versions, so check the game info. Volatility is high: many cascades end quickly, while the big wins need a full meter and Gargantoon.
Pros and cons
| Pros | Cons |
|---|---|
| Constant action with cascades and features | High volatility |
| Gargantoon can transform a spin | No free spins round |
| Good default RTP of 96.51% | Lower RTP versions exist |
| 4,570x max win | Busy screen takes getting used to |
Tips
- Try the demo to learn what each Quantum feature does.
- Keep stakes steady and sessions planned; volatility is high.
- Check the RTP at your casino before playing.
Reactoonz vs other cluster slots
Reactoonz helped make cluster-pays grids mainstream. Pragmatic Play’s Sugar Rush uses the same 7×7 grid with sticky multiplier spots, and Push Gaming’s Jammin’ Jars uses an 8×8 grid with moving multiplier wilds. Play’n GO’s own Gemix 2 also uses a 7×7 cluster grid, with a charge meter that fires grid-changing effects. Reactoonz is the most feature-heavy of the three, but has the lowest top win. Play’n GO’s older Gemix (2014) also uses a 7×7 cluster grid with a charge meter, and Hacksaw Gaming’s Cubes pays clusters of coloured cubes on a grid that grows to 11×11.
| Slot | Grid | Volatility | RTP | Max win |
|---|---|---|---|---|
| Reactoonz | 7×7 | High | 96.51% | 4,570x |
| Sugar Rush | 7×7 | High | 96.5% | 5,000x |
| Jammin’ Jars | 8×8 | High | 96.83% | About 20,000x |
Who Reactoonz suits
Reactoonz suits players who like constant action on screen: something is charging, cascading or transforming on most spins. It has no traditional free spins, so the big moments come from filling the Quantum Leap meter and landing the Gargantoon. Because volatility is high, use small stakes and expect long runs of small wins between features.
If you like the charging meter, Play’n GO’s Rich Wilde and the Tome of Insanity uses a similar idea on a 5×5 cluster grid: winning symbols charge a Portal that adds wilds and, when full, starts the bonus.
Where to play Reactoonz
Our first choice is 1win (9.9/10), which paid our test crypto withdrawal in 15 minutes. BitStarz (9.5/10) is a good alternative. Play’n GO supplies lower RTP versions of Reactoonz, so check the info screen shows 96.51%; if you enjoy it, Play’n GO released a sequel, Reactoonz 2, in 2020. Compare more options in our casino reviews.
Reactoonz FAQs
What is the RTP of Reactoonz?
96.51% by default, with lower versions available to casinos.
What is the max win on Reactoonz?
4,570x your stake.
Does Reactoonz have free spins?
No. Its features come from the Quantum Leap meter and cascades.
What is Gargantoon in Reactoonz?
A 3×3 wild released when the Quantum Leap meter is full.
How do you win in Reactoonz?
Land clusters of 5 or more matching symbols touching horizontally or vertically.
What is the Gargantoon in Reactoonz?
A 3×3 wild released when the Quantum Leap meter is full. It splits into smaller wilds as it is used.
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18+. T&Cs apply.
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