About Reactoonz
Released in 2017 by Play’n GO, Reactoonz still looks like a science experiment that got slightly out of hand. There are no pay lines here — just a 7x7 grid where quantum creatures burst, duplicate, and spawn Wilds in chain reactions.
If you enjoy this kind of organised frenzy, you can try other slots from the same provider in our demo hub, where the Reactoonz demo version also lives comfortably among its successors.
Reactoonz: Slot Overview
In our hands-on testing of the Reactoonz free play mode, we evaluate how the slot performs without a classic bonus round and how its quantum features keep engagement high, delivering excitement comparable to Free Spins in more traditional games.
Graphics & Sound: Chaotic Electric Lab
When you play the Reactoonz online game, you’re essentially stepping into a lab on orbit where every spin feels like an overcharged reactor. The background pulses with electricity, the 7x7 grid hovers mid-air, and the cartoonish aliens blink, hop, and morph with each cascade. No pharaohs or ancient scrolls here — just pure scientific mayhem where physics and probability bend the rules. Rendered in soft 3D lighting, the visuals stay fresh even after hundreds of spins.
The soundscape balances between cartoon comedy and tense sci-fi. Ambient hums echo like lab machinery, while cascades spark with electric bursts and plasma pops. It’s playful rather than dark — full of cheeky squeaks, delighted monster chirps, and upbeat bleeps that make the chaos oddly cheerful.
Volatility & RTP
RTP — 96.51%, though some casino versions list reduced settings of 91.49% or even 87.50%. Volatility is high: Reactoonz can stay quiet for dozens of spins before suddenly erupting through Quantum features and the Gargantoon. The maximum win is capped at x4570 your stake.
How to Play Reactoonz
Bet size is selected from preset options, with values ranging from 0.2 to 100 per spin. You can also use the +/- buttons to move through these fixed amounts. Spins are activated either by clicking the large green button or pressing the spacebar on your keyboard. Depending on the jurisdiction, Auto Play, Fast Play, and Turbo Mode may also be available, allowing quicker or continuous spins.
Game Symbols and Payouts
Reactoonz is built around cluster wins, meaning payouts occur when five or more matching symbols connect horizontally or vertically. The more aliens in a cluster, the higher the payout multiplier applied to your stake.
Top symbols (two-eyed Reactoonz):
| Number | Pink | Green | Orange | Blue |
|---|---|---|---|---|
| 5 | x1 | x0.8 | x0.6 | x0.5 |
| 6 | x2 | x1 | x0.8 | x0.7 |
| 7 | x3 | x2 | x1 | x0.6 |
| 8 | x5 | x3 | x2 | x1.5 |
| 9 | x8 | x4 | x3 | x2 |
| 10+ | x20 | x10 | x5 | x3 |
| 12+ | x50 | x25 | x10 | x5 |
| 15+ | x750 | x300 | x150 | x75 |
Low symbols (one-eyed Reactoonz):
| Number | Purple / Red | Green / Yellow |
|---|---|---|
| 5 | x0.15 | x0.10 |
| 6 | x0.20 | x0.15 |
| 7 | x0.40 | x0.20 |
| 8 | x0.60 | x0.30 |
| 9 | x0.80 | x0.60 |
| 10+ | x1 | x0.80 |
| 12+ | x3 | x1 |
| 15+ | x10 | x3 |
Reactoonz: Slot Features
Instead of Free Spins or bonus rounds, the Reactoonz slot game relies on a series of cascading effects and random modifiers that keep every spin unpredictable.
- Wild: Appears only through features (Fluctuation, Quantum modifiers, Gargantoon). Substitutes for all regular symbols.
- Gargantoon (3x3 Wild): Activated after the fifth Quantum charge. Lands as a 3x3 Wild, then splits into two 2x2 Wilds, and finally into nine 1x1 Wilds, with new symbols cascading between each phase.
- Giantoonz (2x2 cluster): Forms automatically when four matching symbols touch in a square. Any win involving a Giantoonz cluster is doubled.
- Fluctuating Symbol: At the start of each spin, one random one-eyed symbol glows. If it forms part of a win, two Wilds are added in its place.
- Instability: On a non-winning initial spin, Gargantoon may randomly drop 4–8 Wilds onto the grid.
Bonus Choice
There’s no traditional bonus round in Reactoonz — everything revolves around the Quantum Reactor. Wins charge the meters, which then trigger a sequence of quantum effects. All the action happens within a single round.
- Charging: Every 25 winning symbols fill one of five Quantum Leap meters. Up to four charges activate quantum effects in order; the fifth adds the Gargantoon to the queue.
- Activation: Once all cascades end, the stored effects play out one by one. During their activation, new wins can refill the meters and extend the sequence.
- Reset: Meters clear only after the round finishes and no more wins occur.
- Implosion – Turns 3–6 symbols into Wilds and destroys all adjacent ones.
- Incision – Places a Wild in the centre and cuts two diagonal lines filled with one random symbol type.
- Demolition – Removes all one-eyed symbols and any matching types.
- Alteration – Selects one random one-eyed symbol type and transforms all its instances into another symbol.
- Gargantoon – After the fifth charge, a 3x3 Wild appears, then splits into two 2x2 Wilds and later into nine 1x1 Wilds, with fresh symbols dropping in between each phase.
Summary
In the Reactoonz slot demo we tested, the game behaves like a living organism built from cascades and electrical bursts. After hundreds of spins, it felt less like gameplay and more like a chain reaction — charge, flash, Wild, collapse, and another surge of energy. The slot demands patience: there’s no classic bonus round, but when the Gargantoon drops onto the grid, the wait pays off.
This one’s for those who enjoy watching the screen spiral into cheerful chaos rather than chasing Free Spins every few minutes. In our demo hub, you can also find Reactoonz 2, the sequel that expands the quantum mechanics even further. And if you’re after something with multipliers and a more traditional bonus rhythm, give Gates of Olympus a try.
