Gargantoonz Slot Review

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It all started with Energoonz in 2013.

Pros & Cons
Multiple bonus features
No bonus buy feature
Solid max win cap of 7,000x the stake
No free spins
Part of a popular slot series
Low and high bets available
High payouts

The Gargantoonz Slot Game

After an interesting set of circumstances, with the help of electric force, somewhere far in space, several different, cute aliens have been created. That was the story in all the titles from the Reactoonz series of Play'n GO. This time, something similar awaits you, but in larger sizes.

The best way to witness this is to analyze the graphics. Indeed, the first thing that catches your eye is the unusually large black gameboard covered with fun symbols in vibrant colors.

In addition, we also have the background image focused on the far corners of our universe. Here, you will see bright stars as well as animations in the special fields next to the gameboard.

Musically, you can expect relaxing music with a 1990s vibe. But what makes the audio part special are the sound effects, especially the aliens' giggling.

The Gargantoonz slot game may not be entirely original, as it relies on the audiovisual elements of its predecessors, but it brings in some refreshing things.

Symbols and Payouts

Where this space journey will take you depends on the symbols that will appear on the grid of the Gargantoonz online slot. In addition to the four Wilds, which are non-paying, there are ten basic symbols in this release. They're here to help players win instant prizes.

On the first five positions, you'll spot One-Eyed Aliens. The Yellow and Green Aliens offer 0.1 to 20 times your stake. Then, the Red, Purple, and Light-Blue Aliens offer 0.2 to 40 times the stake.

The Two-Eyed Aliens start with the Blue and Orange ones, promising 0.5 to 250 times the bet. After that, the Green delivers 0.6 to 400 times the wager, while the Pink one promises 0.8 to 500 times the bet. Finally, the Red Alien with Golden Horns offers 1 to 1,500 times the stake. Generally, these are big payouts, but they are not unusual for grid-type slots.

While discussing the payouts, I'll also note that you can use bets as high as €100 and as low as €0.1 per round. Finally, the maximum win is limited to 7,000x the bet in a single spin.

Gargantoonz Slot Bonus Features

Skyrocket your experience by activating one of the many innovative Gargantoonz bonus features. Let me explain them in detail.

Cascading Wins

Typically, for grid/cluster pays-type slots, the Gargantoonz slot offers Cascading Wins. So, landing winning combos will make the contributing icons go away. New symbols will take their positions, and the process will continue if they form another winning combo.

Wild Symbols

You'll find four Wilds in this game. They provide extra chances of hitting winning patterns by replacing basic symbols when needed.


When you get a winning cluster with the help of a randomly selected lower-valued symbol, you'll get one or two Wilds on the positions where the symbol was eliminated. The game selects a low-valued symbol like that on each spin.

On the other hand, whenever you end a spin without a winning combination, the slot can provide between four and eight Wilds on the gameboard.

Experiment Charger

Whether you play the Gargantoonz demo game at GoodLuckMate or use real money to play this title in some of the casinos we recommend is irrelevant because you get a chance to use the Experiment Charger. You can see it on the right side of the gameboard. Its activation depends on one thing – hitting winning combos with 20 icons. Once you fill the charger, you'll activate one of the three experiments:

  • Gamma Ray Bursts: You receive seven, eight, or nine Wilds on the reels. Winning Wild symbols take the number of symbols in the clusters where they participate into account before disappearing and consider all instances of that icon. The removed icons are counted once regardless of the number of clusters where they participate.
  • Black Hole: You get four, five, or six Wilds. Winning Wild symbols count the icons that are part of their clusters and keep their positions on the gameboard until you hit winning combos. Once the cascades are over, Wilds gather adjacent icons and contribute to the experiment charger.
  • Supernova: You get three, four, or five Wild symbols on the gameboard. Winning Wild symbols count the icons in the cluster where they participate, stay on the gameboard if winning patterns exist, and go one position diagonally on each cascade. They can't intersect. Once the cascades are finished, the Wild icons move eight positions in any direction where they can, gathering icons in their way until they leave to enter the charger.

Gargantoon Charger

Whenever the experiment is successful, it will charge the special Gargantoon charger. This makes the Gargantoon grow. With each successful experiment, you can expect a starting multiplier of x1 in the charger, which goes up by 1. Multipliers of x1 to x4 can be included in this feature. Succeeding in all three experiments will activate the Gargantoonz feature.

The latter involves three steps. They include eight 1x1 Gargantoon Wild icons that merge if they participate in a winning combo. In this way, they can grow into two 2x2 Gargantoon Wild symbols and one 3x3 Gargantoon Wild. The best part is that the Gargantoon Wilds appear with multipliers.

How to Win at Gargantoonz Slot

Seeing these creatures on the gameboard is fun, but it's even more powerful when they help you form winning combinations. The Gargantoonz slot game promises prizes to any player who lands 5 or more of the same basic symbols in a cluster. In other words, identical icons should touch vertically and/or horizontally.

The grid here includes 7 reels and equal rows per reel. Players can use the clickable buttons below the matrix to change the settings. They can choose the bet's value, click the play button (pulsating bluish circle), use auto-spins, check information, and more.

I advise starting with smaller bets and seeing how that works for you after a few dozen spins. You can also use Gargantoonz free play at GoodLuckMate.

Gargantoonz Slot RTP & Volatility

It's time to reveal the two important technical details. First, the Gargantoonz RTP is96.2%, expected for a Play'n GO slot. Additionally, this is a high-volatility online slot.

The Final Thoughts

You may have noticed in my Gargantoonz slot review that I refer back to previous releases of the Reactoonz slot series several times. That's normal when it's another part of the series.

However, analyzing things, I saw some upgrades that I liked. For example, a few minor visual changes to the animations (animated icons) make the game livelier. There are also alien giggling sounds.

In addition to these elements, it is worth mentioning that the game accepts low and high bets and has a more than decent maximum win limit of 7,000x the total stake. The bonuses might seem complicated to the average player, but I enjoyed them. Additional wild symbols, collecting symbols, and the like increase the excitement and winning possibilities.

If you have played a Reactoonz game, you will surely like the Gargnatoonz slot. But even if you haven't played it, you should give it a chance because of the things I listed.

Slot type
Video Slots
Cluster Pays
Slot bonus features
Extra Wilds
Slot details
Space & Aliens
Play'n GO
Cluster pays
Release date:
Gargantoonz screenshot
Gargantoonz screenshot
Gargantoonz screenshot
Gargantoonz screenshot
Andrej Trajkovski
Andrej Trajkovski
Last Update: 20 Nov 2023
Andrej is an experienced writer specializing in online slots. He writes detailed slot reviews for GoodLuckMate, covering gameplay mechanics, graphics, bonus features, and payout potential. Andrej's expert analysis is highly regarded by both casual and serious slot enthusiasts. With his engaging writing style and deep knowledge of the industry, he is an essential contributor to the GoodLuckMate site.
Nerijus Grenda This article has been Quality Assured by Nerijus Grenda

Can I play Gargantoonz for free?

A: Yes, many online casinos offer the Gargantoonz slot in demo mode, allowing players to try it out for free before wagering real money.

Can I win real money playing the Gargantoonz slot?

A: Yes, it is possible to win real money from the Gargantoonz slot. As long as you're playing for real money that is, of course. It's important to note that the amount of money that can be won from the Gargantoonz slot, or any other slot game, is based on chance and there is no guarantee of winning.

Can I play Gargantoonz with bonus money?

A: Yes, in most cases. Whether or not you can play Gargantoonz with bonus money depends on the specific terms and conditions of the online casino offering the bonus. Some online casinos may restrict certain games, including Gargantoonz, from being played with bonus money, while others may allow it.

Is the Gargantoonz slot available on mobile devices?

A: Yes, the Gargantoonz slot is available on both desktop and mobile devices.

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