Reactoonz 2

Reactoonz 2 is Play'n GO's October 2020 sequel to its alien cluster hit, again on a 7x7 grid where five or more touching aliens pay and cascade away. This time the features run on electricity: winning fluctuating aliens make Electric Wilds and fill a Fluctometer, and every symbol those wilds clear charges a four-level Quantumeter that releases Energoon and Gargantoon wilds. The rules cap wins at 5,083x. Our test of the Reactoonz 2 slot demo ran to 100 logged spins at $1.

What is Reactoonz 2?

The grid hangs in a purple nebula. On its left sit the logo and the round's win list; on its right, a ring showing this round's fluctuating alien and, below it, the Quantumeter with a dormant Gargantoon and a small Energoon behind a charge counter.

Clusters work as before. Five or more identical aliens joined horizontally or vertically form a win, each cluster pays once for its size, and the winners are cleared so the column above can drop and fresh aliens fall in. Cascades continue until the grid shows no win.

The same eight aliens return. At a $1 bet the pink two-eyed one pays $1 for five, $20 for 10 or 11 and $500 for 15 or more, ahead of the green at $200, the orange at $100 and the blue at $60 for that top size. The four one-eyed aliens start at 10 or 15 cents for five and reach $3 or $10 for 15 or more.

You choose the stake from five preset buttons, stepped with minus and plus. The server's coin list, 20 coins at 0.01 to 5.00, gives $0.20 to $100 a spin, though the help text quotes no limits. No gamble is offered: the game pays every round by itself.

Base spin 63 of 100 at $1, settled after its cascades: an Electric Wild on the left edge and $10.95 for the round. FluxPlays demo test, 19 October 2026.

Reactoonz 2 bonus features

The Fluctometer and Electric Wilds

Each round one type of one-eyed alien is picked to fluctuate. When fluctuating aliens win, one Electric Wild appears on one of the spots they leave behind. The Fluctometer also collects every fluctuating alien removed, holds up to 11, and once full adds 1, 2 or 3 Electric Wilds at random after the cascades finish. It refills within the round until a Gargantoon is released, which switches it off.

The Fluctometer page of the paytable in our demo session: up to 11 charges, then 1, 2 or 3 Electric Wilds. FluxPlays demo test, 19 October 2026.

Uncharged wilds

Dim blue uncharged wilds can fall in on any cascade. They never form wins themselves, but a winning cluster next to one, above, below or beside it, or a Wild Pair Explosion turns it into an Electric Wild. Electric, Energoon and Gargantoon wilds all substitute for every alien.

The Quantumeter

The Quantumeter only counts symbols an Electric Wild removes, whether through a win or a Wild Pair Explosion. It has four levels, at 55, 85, 110 and 135 charges, and resets at the start of every round, so nothing is banked between spins.

Below level 3 it pays out in Energoon wilds. Level 2 releases one 2x2 Energoon wild at a cost of 30 charges, and level 1 releases four single Energoon wilds for 55. The meter keeps charging after an Energoon appears.

The Quantumeter page in our demo session: four charge levels, from 55 charges up to 135 for the overcharged state. FluxPlays demo test, 19 October 2026.

The Gargantoon and the x2

At level 3, 110 charges, the Quantumeter releases the 3x3 Gargantoon wild instead. After it triggers a cascade it becomes two 2x2 Gargantoon wilds, and after the next, nine single ones; releasing it switches off both meters. At level 4, 135 charges, every win that includes Gargantoon wilds is doubled, with only one x2 per cluster.

The Gargantoon page in our demo session: the 3x3 wild, its 2x2 and 1x1 splits and the x2 for an overcharged meter. FluxPlays demo test, 19 October 2026.

Wild Pair Explosion

When the cascades and both meters are done and two or more Electric Wilds are still on the grid, two of them pair up, adjacent ones first. An adjacent pair clears every symbol that is not a wild. A pair that is not touching destroys the aliens between them; the paytable page adds the ones around them too. Cleared symbols pay nothing, but they charge the Quantumeter.

The order is fixed after the cascades: the Fluctometer first, then the Quantumeter, then the Wild Pair Explosion.

The Wild Pair Explosion page in our demo session: what adjacent and separated Electric Wild pairs remove. FluxPlays demo test, 19 October 2026.

RTP, volatility and max win

The paytable states the cap: up to 5,083x your normal bet, $5,083 at $1. It gives no RTP, and neither does the help text or the official page. Review sites agree on 96.20% as the top version, and the practice demo does not show which version it runs. They rate the game high volatility; the game has no label of its own.

Our Reactoonz 2 demo test

We played the official practice demo in one session without reloading it. The balance reads in credits with no currency symbol, which we count as dollars, one for one. It started at 25,000.00 with the 1.00 button lit. After a first click, a script pressed the spin button for spins 2 to 100, one at a time and without Auto Play.

By the game server's log we staked $100.00 and got $40.30 back, finishing at 24,940.30, the same figure the screen showed. The balance peaked after spin 2 at 24,999.70 and closed the session at its lowest.

Small wins were the rule. Of 47 paying spins, 36 returned less than $1, $9.70 in all, and only 11 reached the stake. The longest dry spell was 9 spins, 64 to 72, straight after the best round.

That round was spin 63, a chain of cascades worth $10.95, 10.95x the bet. Its win list included eight green two-eyed aliens for $3.00, seven pink for $3.00 and eight orange for $2.00, and an Electric Wild sat on the left edge when it settled.

The next best were $4.45 on spin 96 and $2.65 on spin 37. Spin 63 is a single result: the other 99 spins returned $29.35, and without spin 96 as well, 98 spins made $24.90 from 45 wins.

The log does not show which features fired in which round, so we make no claim about Energoon wilds, the Gargantoon or a Wild Pair Explosion. A sample of 100 spins also cannot measure the RTP or the volatility.

Is Reactoonz 2 worth trying?

The sequel is a game of steps. Fluctuating wins make Electric Wilds, the wilds clear symbols, the clearing charges the Quantumeter, and its levels hand out bigger wilds, with the Wild Pair Explosion as a last sweep. Each round starts the chain from nothing, so all of it has to happen inside one paid spin.

Against the Reactoonz original, by both games' rules, the grid, the cluster rule, the eight aliens and the one-eyed pays are the same. What changes is the engine. The original charges its meter with every winning symbol and draws random Quantum features such as Implosion, with doubled Giantoonz on the side; the sequel charges only through Electric Wilds and pays out in fixed tiers of wilds.

The top pays dropped, $500 rather than $750 for 15 pink aliens, but this game states its 5,083x cap in its own rules, where the original states none.

Our two sessions ran alike: $40.30 back here against $33.60 there, with best rounds of $10.95 and $6.35. Those are single results, not a measure of either game.