Gigantoonz slot
Gigantoonz is a Play’n GO grid slot released on 27 January 2022 as part of the Reactoonz series, played on an 8x8 grid that pays for clusters of matching creatures. Its signature is the Mega Symbol, a block from 2x2 up to 7x7 that counts as one symbol with a higher cluster value and leaves a Wild behind when it is cleared from the grid.
Editorial note: this guide explains how Gigantoonz works. Rules, features and payout figures are set by the studio and can differ between operators and game versions, so check the game’s information panel before you play. Slots are games of chance, and nothing here predicts results. Availability at Fortune Games can change.
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Gigantoonz: key facts
| Studio | Play’n GO |
|---|---|
| Released | 27 January 2022 |
| Reels and pays | 8x8 grid, cluster pays with cascading wins; a win needs 6 or more matching symbols touching horizontally or vertically, as the Symbols page in our lobby shows |
| Mega Symbols | 2x2 to 7x7; each counts as one symbol with a higher cluster value and leaves a Wild when removed (the Mega Symbols page in our lobby lists the sizes from 2x2 to 7x7, gives each Mega Symbol a cluster value randomised up to 13 and says each winning one leaves a Wild on the grid) |
| Quantum Wilds | 5 to 10 added at random on a non-winning spin |
| Quantumeter | Charged by winning symbols; four levels at 25, 50, 75 and 100 charges |
| Disintegration (25 charges) | Removes every instance of 4 randomly selected symbols |
| Metamorphosis (50 charges) | Transforms randomly selected symbols |
| Radiation (75 charges) | Adds up to 4 Mega Symbols and 2 to 5 Quantum Wilds |
| Gargantoonz (100 charges) | Turns Mega Symbols into Mega Gargantoonz, at least 3; they later split into 1x1 Gargantoonz |
| Free spins | Not part of this game |
| Autoplay and turbo | Not available at sites licensed in Great Britain; UK rules require at least 2.5 seconds between the start of one game cycle and the next |
| Stakes | From 20p a spin in the studio’s range. UK rules cap online slot stakes at £5 a spin, or £2 if you are 18 to 24 |
| RTP | Shown in the game’s information panel |
| Top payout on the Symbols page | The red creature with the gold crest in the X30+ row: 1,250x the stake (£2,500 at a £2 stake), the highest figure on the Symbols page from our lobby shown below |
| Maximum win | Up to 4,000x the stake (shown as “Win up to 4000x your normal bet!” on the Symbols page in our lobby) |
| Series | Reactoonz (compared below) |
All values (Bet Levels, Maximum Wins etc.) mentioned in relation to this slot game are subject to change at any time.
The Symbols page in our lobby, at a £2 bet: five columns of cluster pays from the X6 row up to X30+, where the red creature with the gold crest shows £2,500.00, the highest figure on the page. It says wins need 6 or more matching symbols touching horizontally and/or vertically, and reads “Win up to 4000x your normal bet!” Game and artwork © Play’n GO.
How Gigantoonz plays
The board is a square of 64 positions, and wins come from clusters of the same creature touching one another rather than from lines. After each win the winning symbols disappear and new ones fall into the gaps, so one spin can run through a chain of cascades before it settles.
Gigantoonz in our lobby on 14 November 2026, at £2 a spin: the 8x8 grid of one-eyed and two-eyed creatures, with a counter reading 0 / 25 beside it. The bar above the game carries a timer and a £ figure, £0.00 here before any spin. UK rules require online slots to show time played and net position. Game and artwork © Play’n GO.
Mega Symbols change the arithmetic. A block of one creature, anywhere from 2x2 to 7x7, joins a cluster as a single symbol but brings a bigger cluster value with it, randomised up to 13 according to the Mega Symbols page in our lobby. When the block is cleared it leaves a Wild in its place. On a spin with no win at all, the game can add 5 to 10 Quantum Wilds at random, and these wilds can then help to form clusters on the cascades that follow.
The Mega Symbols page in our lobby: Mega Symbols can be 2x2, 3x3, 4x4, 5x5, 6x6 or 7x7 in size, each with a cluster value randomised up to 13. A Mega Symbol counts as a single symbol in a win, its cluster value is used for the payout, and each one that wins leaves a Wild behind. Game and artwork © Play’n GO.
The Quantumeter
Every winning symbol charges the Quantumeter that runs alongside the grid. Once the cascades stop, the next stage the charge has reached is released. Disintegration comes first, at 25 charges, and removes every instance of four randomly selected symbols. Metamorphosis follows at 50 and transforms randomly selected symbols. Radiation, at 75 charges in total, drops in up to four Mega Symbols and between two and five Quantum Wilds.
Gargantoonz
The fourth stage needs 100 charges and wakes Gargantoonz. All Mega Symbols on the grid become Mega Gargantoonz, and at least three appear even if the board held fewer Mega Symbols. In the second step each Mega Gargantoonz splits into 1x1 Gargantoonz symbols, which are then removed in the normal way and let fresh symbols drop in. Gargantoonz Wilds appear only through this stage of the meter.
Gigantoonz compared with Reactoonz and Reactoonz 2
Reactoonz started the series in October 2017 on a 7x7 grid, where winning clusters charge Gargantoon until he jumps onto the board. Reactoonz 2 arrived in October 2020, still 7x7, and adds Electric Wilds that charge its Quantameter: partial fills bring Energoon Wilds and a full one Gargantoon Wilds. Gigantoonz widens the board to 8x8 and builds its play around Mega Symbols, with Gargantoonz as the last of four meter stages. All three pay for clusters of touching symbols, so the differences sit in the size of the grid and in the route to the giant wild.
| Game | Released | Grid and lines | How the giant wild arrives |
|---|---|---|---|
| Gigantoonz | January 2022 | 8x8, cluster pays | Fourth Quantumeter stage turns Mega Symbols into Mega Gargantoonz |
| Reactoonz | October 2017 | 7x7, cluster pays | Winning clusters charge Gargantoon, who lands on the grid when fully charged |
| Reactoonz 2 | October 2020 | 7x7, cluster pays | Electric Wilds charge the Quantameter; a full charge brings Gargantoon Wilds |
All values (Bet Levels, Maximum Wins etc.) mentioned in relation to this slot game are subject to change at any time.
Gigantoonz at Fortune Games
Gigantoonz is one of the grid games in the Fortune Games slots lobby (18+), which also carries Reactoonz, Reactoonz 2 and Reactoonz 100. The UK caps in the table apply to every player. There is no autoplay or turbo mode, as at every site licensed in Great Britain. Fortune Games has an app on the App Store and Google Play.
Frequently asked questions
What is Gigantoonz?
Gigantoonz is a Reactoonz game from Play’n GO, released in January 2022 after Reactoonz in 2017 and Reactoonz 2 in 2020. It keeps the series’ alien creatures, cascades and cluster wins, while the grid grows to 8x8 and Mega Symbols of up to 7x7 join the familiar charge meter and its stages.
How does the Gigantoonz slot pay out wins?
Wins come only from clusters of the same creature touching on the grid, with each cascade able to add another win before the spin ends. A Mega Symbol in a cluster counts as one symbol with a higher cluster value. Clusters can run in any shape, as long as the symbols in them touch horizontally or vertically, and there are no paylines to follow.
Does Gigantoonz have free spins?
No. The game has no free spins round or separate bonus screen. Its extras all happen on the main grid during ordinary spins: Quantum Wilds on spins without a win, Mega Symbols, and the four Quantumeter stages that are released when a run of cascades ends.
Related guides
Checked on 14 November 2026 against Play’n GO’s game pages for Gigantoonz, Reactoonz and Reactoonz 2, the Play’n GO Gigantoonz launch release, the SlotCatalog records for all three games, the casinos.com records for Gigantoonz and Reactoonz 2, the Gambling Commission’s stake-limit guidance and remote technical standards, and the game in the Fortune Games lobby on 14 November 2026. Reviewed by Kay Cheadle on 14 November 2026. How we research and check our guides: our editorial policy.