
The Reactoonz 100 slot plays out across a 7x7 grid, where cartoon aliens of different shapes and colours pay in clusters. It’s part of a hugely popular series from Play’n GO and this edition comes with some powerful extras that can unlock wins of 10,000x the bet.
Every win triggers a cascade which can lead to another win and repeat the process – no limits! Multipliers can increase over any sequence of cascades to a huge maximum of 100x, while symbols collect in a meter to unleash special Quantum features as it fills. Extra wild symbols, transformations, the removal of low value aliens, and giant wilds are up for grabs at each stage. Wilds can appear on random non-winning spins or spread across the grid for stellar prizes.
This high volatility game has a return to players of 96.20%. It’s available to play now alongside the rest of the extensive range from this developer at the best slots sites.

Like others in the series, the Reactoonz 100 slot has a bright, cartoon style with a whole intergalactic zoo of cute aliens across the grid. Pink, purple, green, and yellow creatures appear, in either lower value one-eyed versions, or higher paying aliens with two eyes. A UFO meter sits to the left of the grid and a sleeping Gargantoon rests in its spacecraft to the right, ready to collect winning symbols and unleash features.
The bet range is from 0.10 to 100.00 and it’s easy to pick from the many options using a scroll bar under the game. You access the paytable with a click on the ‘I’ tab and this lists how much the various Reactoonz pay when at least 5 of the same type land in clusters connected horizontally, vertically, or in blocks. The single eyed red and green critters pay the least, at 0.1x the bet when 5-of-a-kind appear, increasing to 1.5x when 15 or more stop on the grid. The high value pink alien is worth from 1x to 100x. Wild black holes help to form clusters as they substitute for other symbols.
You can play the Reactoonz 100 slot on desktop platforms, iOS, Android, and Windows mobiles, with other options for non-UK players including buying into bonus rounds, autoplay, and turbo modes.
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Winning clusters vanish and those left on the grid cascade down to take their places, as new Reactoonz drop in from above. At the start of each round, a random one-eyed alien becomes a Fluctuating symbol and any time it’s part of a winning cluster, 2 wild symbols are left behind.
Cascades keep flowing until there’s no further win and lots can happen over a series –
A spaceship to the left of the grid collects all winning symbols then zaps a random spot, creating an Energised Toon with a 2x multiplier. If the energised position is then in the next winning cluster, its multiplier applies. If it isn’t, but there’s a win elsewhere, a new random Energised Toon appears. Wins from one-eyed Toons build the multiplier by 1x on each cascade, with wins from two-eyed versions boosting the value by 3x. You can hit a maximum multiplier of 100x over a long enough series of cascades, but they only apply if the Energised Toon is in the win.
The sleepy Garga rests in a Quantum Meter. Winning symbols charge the meter and for every 25 over a cascades sequence, a new Quantum feature is activated. These play out once the series comes to an end, and if more than one feature is activated, they queue up and award their features in any order –
Implosion – Turns from 3 to 6 random symbols into wilds, while destroying all those around them to trigger a cascade.
Incision – Places a wild symbol in the centre spot and diagonals of a matched random symbol from the middle to all 4 corners.
Demolition – Destroys all one-eyed symbols and all matched symbols for a cascade.
Alteration – Picks a random one-eyed symbol, plus all matching symbols and turns them into another type.
Gargantoon – This is always triggered last. It wakes up the Gargantoon and moves it to 8 random spots where it turns into wild symbols. Once any cascades end, it becomes two 2x2 wilds, then once these cascades come to an end, the Gargatoon transforms into a single 3x3 wild to ensure another cascade.
Randomly on a non-winning spin, from 4 to 8 wilds can appear on the grid to help create a win and start the cascades sequence.
The maximum win is equal to 10,000x the stake, or 1,000,000.00 at the highest bet level of 100.00. You can win this from any paid game over a long enough series of cascades with multipliers. The volatility gets a full 10 out of 10 rating from Play’n GO so you can expect relatively long runs of non-winning spins, but big prizes once the Toons line up in the right places and features build in value.
Taken as an average over a huge number of spins, the Reactoonz 100 slot machine has a return to players of 96.20%, which is a standard level for Play’n GO slots.
Anyone looking for a fun game with adorable characters, lots of fast-paced animations, and multiple features should try the Reactoonz 100 slot machine. There’s no standalone bonus round such as free spins or respins, as everything triggers from cascades, where multipliers build and winning symbols collect in the Gargantoon meter, ready to unleash their modifiers at the end.
The volatility is high, so set your bet level with this in mind, and some casinos can lower the return to players. Check out sites approved by gambling.com to make certain of the best value. Once you sign up, you can unleash the alien horde and play the Reactoonz 100 online slot at the best casinos featured on this page.
The Reactoonz 100 slot pays a prize when at least 5 matched symbols land in clusters, connected horizontally or vertically. The highest value symbol is worth up to 100x the stake and a wild symbol helps by acting as others.
While there’s no free spins feature in the Reactoonz 100 slot, it comes packed with other bonuses which can trigger from any paid spin. These include cascades on every win, multipliers of up to 100x, and modifiers that trigger at the end of cascades.
Yes, you can. The Reactoonz 100 slot is fully optimised for phones and tablets running the Android, iOS, and Windows operating systems. Of course, it works just as well on desktop platforms at our picks of the best casinos online.
Reactoonz 100 is one of several games to star the same mix of colourful cartoon aliens. Others include the original and Reactoonz 2, while the Garantoonz slot has a different title, but the same symbol mix and similar features.
Play’n GO make the Reactoonz 100 slot machine as well as the rest of the series. They also make a wide range of other popular slots such as Legacy of Dead, 13th Trial Hercules Abyssways, Fire Joker Blitz, and many more.