Reactoonz (Play’n GO) Online Slot Review

A surprisingly good game from Play’n GO and probably one of the best cascading type slots ever made

NetEnt and their parent brand Yggdrasil have been quite active with producing childish games, something we’re not big fans of in general. Gambling is serious business and not just fun, harmless video games. This had to be said and it’s something the UK Gambling Commission is currently looking into. However, we’re not going to bore you too much with moralisation.

Reactoonz is more or less a follow up to Energoonz so if you’ve played that game you will instantly recognize the theme.


Reactoonz is a cascading video slot played on a 7×7 grid. Symbols drop down in the grid to form winning combinations and wins are achieved by landing 5 or more symbols in a connected cluster horizontally and/or vertically. Winning symbols are removed and new symbols drop in to fill up the grid. The game continues to cascade until no new winning combinations can be created.

All wins during a game round contribute to increasing the 5 Quantum Leap charge meters one by one. When a charge meter is fully charged, one of the following quantum feature is added to the queue randomly:

  • Implosion: Transforms 3 to 6 symbols into wild symbols, while also destroying all adjacent symbols
  • Alteration: Chooses 1 random one-eyed symbol, and all matching symbols turn into another symbol. In case if there are no one-eyed symbols on the grid, feature can choose any available symbol
  • Demolition: Destroys all one-eyed symbols and all matching symbols
  • Incision: Cuts a wild symbol into the centre, and creates two intersecting diagonal lines through the grid. Both lines will show the same random symbol.

When all 5 meters are fully charged, the Gargantoon feature is added to the queue. The Gargantoon first adds a 3×3 wild symbol to the grid in a random position. If no more cascades are possible, it first becomes two 2×2 wild symbols, before finally ending up as nine 1×1 wild symbols.  New symbols drop down from the top to fill the grid before each move.

If no more cascades are possible, the Quantum features in the queue are triggered. The game round continues normally, allowing the charge meters to charge up for more effects, possibly creating additional wins. Charge meters reset only at the end of the game round, if there are no more winning combinations present.

On any initial npn-winning spin, there is a chance for the Gargantoon to drop 4 to 8 wild symbols onto the grid.

4 matching normal symbols adjacent to each other in a square shape automatically form Giantoonz. Wins are doubled in any winning combinations if one or more Giantoonz are part of it.

One random one-eyed symbol type is marked as fluctuating symbol in each spin. If any of the marked symbols are part of a winning combination, they leave 2 wild symbols behind. Wilds substitute for all normal symbols.


Initially the game comes across as a bit confusing and complicated, so you just have to sort of go with it and see what happens until you start to get the hang of it. Play’n Go have specialized in these types of cascading slots and some have become quite popular, such as the recently released Moon Princess. With that said, we’re not huge fans of cascading slots, but must admit that this is a good game.

The potential is certainly there and the main game allows for a lot of action and game play. The engine and maths behind the slot are well balanced, and despite being a fairly volatile game it can give quite a lot of game time.

Beware though as it can be very tilting and frustrating too. It’s not too uncommon to reach the 3rd or 4th bar just to see the progress vanish in a heartbeat. It’s not too uncommon for the Gargantoon feature to position itself at the worst possible place either.

The game is in the medium volatile category and has an RTP of 96.51%.

Reactoonz is available on casinos such as Videoslots, Casumo and Casilando.

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Reactoonz (Play'n GO)
  • Looks & Sound
  • Entertainment Value
  • Potential
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