Return to player
96%
Min bet size
0.20
Game type
Video Slots
Variance
High
Reels
7
Progressive Jackpot
No
Popularity
Max bet size
100
Game provider
Play'n Go
Bonus Features
Yes
Paylines
Cluster-Pays
Theme
Alien
Reactoonz online slot game
Aliens that look like M&Ms, but with tons more personality. Spooky, but also cute, retro, UFO inspired music. And energy charge effects that look like laser beams gone wild. All this and more gives us the legendary Reactoonz. Released in 2017, this slot has been loved around the world for its fun theme, smooth mechanics, and lovable characters. With an RTP of 96.51% and a win potential of up to 4,750x, we found the thrill of this highly volatile slot never fades.
Reactoonz at a Glance: All the Important Facts to Know
- Grid Setup: 7x7 grid filled with quirky alien symbols.
- Symbols: Low-pays: one-eyed aliens (yellow, green, red, purple), High-pays: two-eyed aliens (blue, yellow, green, purple), Special : Gargantoon (three-eyed alien) appears only via features.
- Payout System: Wins form in clusters of 5+ matching symbols (horizontal/vertical).
- Cascading Wins: Winning clusters disappear; new symbols drop in until no more wins.
- Wilds: Substitutes for alien symbols; only triggered through features.
Let's talk about the Graphics and Sound of the Reactoonz Slot
What instantly grabbed our attention was the large grid filled with colourful aliens, each resembling Mike Wazowski from Monsters Inc. The next things we noticed were Gargantoon’s snores as he slept to the left of the grid. The score of the game is basically a high-pitched technological whistling which resembles your typical alien-themed background music. As you play the game, the cartoon-alien inspired sound effects keep changing to reflect the pace of play; basic while the cascade mechanic isn’t triggered, and exciting as different features kick in.
Reactoonz is bright and colourful. Its music and sound effects fit the theme of the game like a glove, and the mechanics and transitions function very smoothly.
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How to Play Reactoonz Slot
Reactoonz’s legend comes from being the first to use what are now widely adopted features. This includes its 7x7 cascading grid, which gives wins from clusters instead of paylines. These clusters can also trigger chain reactions, leading to multiple wins from a single spin. And even after all this time and so many copycats, it's look and mechanics still feel smooth as silk.
It would help you to note that the low-pay aliens give you really small wins. At max bet, the low-pay aliens barely scratched 10-20 credits, but premium wins jumped up into the thousands. However, while playing the game, we mostly saw wins ranging from 1.15x to 5x our bet. And it takes a lot of turns to get very little pay if you play the game manually. But the Autoplay feature is an effective tool which really impacts the returns one can expect in a positive way.
*The symbol payout chart shown below is calculated based on a $1.00 bet.
| Matches |  |  |  |  |  |  |  |  |
|---|---|---|---|---|---|---|---|---|
| 15+ | 750x | 300x | 150x | 75x | 10x | 10x | 3x | 3x |
| 12+ | 50x | 25x | 10x | 5x | 3x | 3x | 1x | 1x |
| 10+ | 20x | 10x | 5x | 3x | 1x | 1x | 0.8x | 0.8x |
| 9 | 8x | 4x | 3x | 2x | 0.8x | 0.8x | 0.6x | 0.6x |
| 8 | 5x | 3x | 2x | 1.5x | 0.6x | 0.6x | 0.3x | 0.3x |
| 7 | 3x | 2x | 1x | 1x | 0.4x | 0.4x | 0.2x | 0.2x |
| 6 | 2x | 1x | 0.8x | 0.7x | 0.2x | 0.2x | 0.15x | 0.15x |
| 5 | 1x | 0.8x | 0.6x | 0.5x | 0.15x | 0.15x | 0.10x | 0.10x |
Later games in the series, such as Reactoonz 100, have added elements such as a higher win potential of 10,000x and a more dynamic design. But they still stuck to the basics of the mechanics and features, likely because of how well they work.
Try the Reactoonz Demo Version for Free
Before betting real money, you should definitely try the Reactoonz free-play version. It will help you practice with cascades, learn how Quantum Leap meters work, and give you insights on which features are more likely to increase your chance of a win.
Bonus Features in the Reactoonz Slot
The reason why the Autoplay feature gave us big wins in a shorter time is simple: quickly triggered bonus features. The slot went against the stream and gave us the Quantum Leap charge meters instead of free spins. Clearing 25 symbols can fill one meter, triggering a random feature. If you get to charge all five meters then you unlock the powerful Gargantoon Feature. And this is the key to Reactoonz’s maximum win potential.
Cascading Reels
With the cascading reels every winning cluster disappears, and new symbols fall in the emptied space. This can create continuous chain reactions, giving you multiple chances to win from a single spin.
Giantoonz Feature
The iconic Giantoonz Feature is a high-paying mechanic. When four identical symbols land in a square, they merge into a giant symbol with a 2x multiplier, doubling any wins they are part of.
Instability Feature
On any losing spin, the Instability Feature may be activated. When it does, 4 to 8 wilds can be dropped onto the grid by Gargantoon, boosting your chances of landing a winning cluster.
Fluctuation Feature
At the start of each spin, one low-paying alien becomes the Fluctuating Symbol. If this symbol forms part of a win, it leaves behind two wilds, which can trigger more cascades and additional payouts.
Quantum Leap Features
Every time 25 symbols are cleared from the grid, you get one charged meter. This unlocks one of four Quantum Features:
- Implosion: Converts 3–6 symbols into wilds while destroying adjacent ones.
- Alteration: Transforms all instances of a chosen low-paying symbol into a higher-value one.
- Demolition: Wipes out all low-paying symbols, letting higher-paying aliens drop into place.
- Incision: Places a wild in the grid’s center and creates intersecting diagonal lines, transforming all affected symbols into one matching type.
With the game’s cascading mechanics coming together with random modifiers, and Quantum features, Reactoonz becomes an exciting slot leading to high win potentials beyond our initial anticipation.
Winning Strategies for the Reactoonz Slot
While Reactoonz is a game of chance, we found that capitalising on its unique mechanics can help maximise your winning potential. Below are some key strategies to keep in mind when playing this popular Play’n GO slot.
Take Advantage of Cluster Pays and Cascades
With the cluster pay system of Reactoonz, you should aim for larger clusters. We saw a significant increase in payouts with more matching symbols when we did this. The cascading mechanic means each win can trigger additional wins, so you’d want to increase the probability of extended chain reactions. This is where the real value lies.
Focus on Charging the Quantum Leap Meters
Since every win contributes toward the Quantum Leap charge meters, if you build up all five meters, you can unlock the Gargantoon feature. This leads to the slot’s biggest win potential. Aiming for continuous cascades that keep the meters charging for as long as possible is a good strategy.
Watch for Fluctuation and Giantoonz Features
The Fluctuation feature randomly assigns a one-eyed alien to leave wilds behind when part of a win. Keeping track of this symbol can increase your chances of creating bigger clusters. Similarly, when four identical symbols form a square, the Giantoonz feature adds a 2x multiplier, doubling any wins connected to it, perfect for boosting payouts during cascades.
Manage Your Bankroll Wisely
Reactoonz is a high-volatility slot, meaning payouts can be less frequent but much larger when they hit. We also found the low payout from basic aliens frustrating and went with the high bets on Autoplay. To make sure you don’t end up doing something like this with real money, we feel you should set a budget before you play. Use smaller bet sizes to extend gameplay, and wait for the bigger features like Gargantoon to land. This approach will give you more chances to benefit from the slot’s high potential.
All the Technical Details
Played on a 7x7 grid, Reactoonz is a high-volatility game. It replaces traditional paylines with the innovative Cluster Pays mechanic. Wins are triggered by landing five or more matching symbols in a cluster, with cascading reels allowing new symbols to drop in after every win. This creates the potential for continuous payouts in a single round.
Reactoonz offers an RTP of 96.51%, which is higher than Reactoonz 2 and Reactoonz 100, both at 96.20%. We’d like to add that this RTP can vary between 96.51% and 84.51%. The average RTP for cascade slots is between 96%-98%, so make sure you find the best online casinos and check the RTP setting before you start betting.
Players can bet anywhere from 0.20 to 100 per spin, and the slot’s reported maximum win is up to 4,570x your stake. Alongside its base mechanics, the game is packed with bonus features, including cascading wins, wild substitutions, Quantum Leap modifiers, and the powerful Gargantoon feature, all of which contribute to its fast-paced gameplay.
Best Alternatives to the Reactoonz Slot
If you’ve enjoyed the cute look, cascade mechanic, and volatility of Reactoonz, we’re sure you’ll enjoy these slots as well:
- Reactoonz 2: A nod to the success of Reactoonz, this sequel by Play’n GO uses the same cascading grid. But it also stands out with features like the Fluctometer, Quantumeter, and Electric Wilds. It also gives you a higher win potential of up to 5,083x your stake, delivering excitement while keeping the charm of the original Reactoonz.
- Reactoonz 100: The third instalment in the Reactoonz series by Play’n GO, Reactoonz 100 is the most natural recommendation for fans of the original. It keeps all of your favourite features like the cascade mechanic and bonus features, but adds to it with a more dynamic design, energetic music, Energised Toons, and a much higher maximum win potential of 10,000x.
- Sweet Rush Bonanza: If you’re looking for something a bit different but still want a colourful grid with a cascade mechanic, you should check out Sweet Rush Bonanza by Pragmatic Play. With the candy-filled charm of Sugar Rush and the scatter pays style of Sweet Bonanza, this slot employs familiar mechanics by letting multipliers build on specific grid positions, creating bigger payout potential with every spin.
Our Verdict
Reactoonz is a genuinely fun slot, Its cascading wins and features like Quantum Leap keep giving you something to enjoy. Charging the meter, on the other hand, keeps the tension high. Too often, we saw the meter almost get to the last bar, only for it to go up in smoke. Then we have the irritatingly tiny wins from the low-pay aliens at the start of the game that were, at times, frustrating. It can be stressful, but it also makes the wins that much sweeter.
The slot does face some very direct competition. Recent instalments in the series bring additional features, notably the high 10,000x max win potential of Reactoonz 100. They give you the comfort of a familiar style and mechanics, but also add the punch of graphics with more sizzle and bigger possible wins.
But the secret to Reactoonz is its balance between creativity, gameplay, and tension. They make the wins feel like they’ve been earned. Its quirky alien theme, vibrant visuals, and action-packed features have made it a timeless favourite. So if you’re looking for an immersive and rewarding online slot, just keep going back to this classic slot, which has withstood the test of time by being a consistently sought-after game.
James is a casino games expert on the Playcasino.com editorial team. With many years of professional experience at a leading casino game development company and a passion for playing casino games, James has become a true expert in slots, blackjack, roulette, baccarat, and other games.
James uses this expertise to provide reliable, insider advice through his reviews and guides, breaking down the game rules and offering tips to help you win more often. Rely on James's extensive experience for expert advice on your casino play.
