Inspired by the power of the elements personified as cute and cooky characters, Energoonz is a cluster pays slot from Play’n Go with a top prize of 1,000x the total stake. Keep on reading our Energoonz slot review to learn more about the 2013 release that kicked off the massively popular ‘Reactoonz’ series.



Play'n GO's Energoonz is set on a 5x5-reel slot machine. There are no traditional paylines; instead, wins are formed by connected groups of matching symbols (which can include a traditional 3 in a row). Play’n GO referred to this as a ‘grid system’ when the slot was released in 2013. Still, modern slot players will know this payout structure as a cluster pays system.
Players must first choose how much they want to bet before they can start spinning. As there are no paylines in this slot game, your wager is split equally across the grid. Wagers start at 20p per spin and can reach up to £40 per spin (though restrictions of £5 may be used in some regions). Clicking or tapping "Start" or hitting the space bar spins the reels. Autoplay is available for players outside the UK.
There are two different RTP rates for Energoonz. The default rate is 96.69%, which is still impressive to this day; just watch out for the lower option, which is 94.74%. Energoonz has a low volatility rate, keeping it accessible to most players, and the top prize is 1000x the total stake.
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Energy symbols and creatures populate the science fiction-themed Energoonz online slot game. The reels are set in a lab lit by a giant Tesla coil. Colours and high-definition animations bring the extraterrestrial creatures to life in this slot game.
Flames, lightning bolts, and atoms float on the reels of this intriguing online slot. Three green, orange, and black monsters flank these symbols. In this exciting slot game, the plasma ball is a prominent symbol. It pays and substitutes symbols to form winning combinations.
The game's space concept and soundtrack provide a compelling environment, though less intrepid players can opt to turn these off and provide their own ambience.The full paytable for Energoonz is as follows:

Black Alien
3 = 0.5x stake / 4 = 2.5x stake / 5 = 25x stake

Orange Alien
3 = 0.35x stake / 4 = 1.5x stake / 5 = 15x stake

Green Alien
3 = 0.35x stake / 4 = 1.5x stake / 5 = 15x stake

Double Lightning Bolt
3 = 0.3x stake / 4 = 1.25x stake / 5 = 10x stake

Lightning Bolt
3 = 0.3x stake / 4 = 1.25x stake / 5 = 10x stake

Double Fireball
3 = 0.25x stake / 4 = 1x stake / 5 = 7.5x stake

Fireball
3 = 0.25x stake / 4 = 1x stake / 5 = 7.5x stake

Energy Ball
3 = 0.2x stake / 4 = 0.75x stake / 5 = 5x stake
Energoonz can be played on all devices, including mobile ones operating on Android, iOS, and Windows. The grid set up and clusterpays system are akin to other match-3 mobile games, so players familiar with these will have no issue getting to grips with Energoonz.



Energoonz has some bonus features which today are commonplace, but were revolutionary when Energoonz was first released. These include a cascading reel feature, 3 years before Bonanza, and a free spins bonus with a unique method of activation.
In terms of the online slot world, having been released in 2013, Energoonz is practically ancient. Released three whole years before the first Megaways slot (Bonanza 2016), Energoonz uses a cascading reel system different to what we know today. These cascading reels do not form new reels and extra paylines, but symbols do tumble down in a chain reaction that can result in multiple wins per spin. Alongside thi,s a global multiplier increases with each win during the chain. When no new combinations can be made ,the multiplier resets to ,1 and players can spin again.

This symbol looks like a glowing blue orb and only appears after a winning combination. Left behind by the aliens, and operating like a typical wild (substituting for all non-special symbols), the wild can help eke out a few more winning combinations and thus boost the multiplier chain.
The word "bonus" is written on the backdrop of the reels. Aliens will land over them, andiff you can clear those that are covering these letters, the free spins bonus round will begin.
Players are granted 10 free spins, during which players are transported to a secondary reel with small grey aliens who are snoozing.. These aliens are worth more than those in the base game.
If playerscano land more bonus symbols (the energy balls), players can gain up to 20 additional free spins.
Energoonz opened the door for a slew of top-tier cluster paysslotst from Play’n Go, such as Reactoonz, Gigantoonz and Gargantoonz, meaning it is safe to say this slot should have been called ‘Collosoonz’ or ‘Humongoonz’ as it made an indelible impact upon the online slots world.
There is no getting around the fact that at 12 years old, Energoonz looks a little dated. The graphics have that low-definition blur to them, but the colours still pop and the characters are fun and engaging. The math model for Energoonz more than holds up against the test of time with a 96.96% RTP that is still generous by today's standards.
All in all, while the serious wow-factor this slot must have had when it was first released has faded somewhat, there is still plenty of life in the old slot yet. For these reasons I rate the Energoonz slot at a respectable 7.5/10.
Rating: 7.5
Here are some of the most common questions we get asked about Energoonz.