Reactoonz 100: slot review and demo

Five charge meters, four quantum effects and a Gargantoon that ends as a 3x3 Wild on a 7x7 grid.

Casinos & availability

Free demo from the studio’s official server, with no registration. 18+

by Play'n GO

★ 8.3 Very high RTP 96.20% x10,000
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Clusters on a 7x7 grid with five charge meters, a giant Wild and a 10,000x ceiling at very high volatility.

Reactoonz 100 review

Reactoonz 100 arrived on 23 October 2025, eight years after the original. One-eyed and two-eyed creatures, five charge meters and the giant Gargantoon continue Play’n GO’s space theme. Its multiplier applies only to some clusters.

Clusters, cascades and table units

Forty-nine cells are filled with symbols, and a win needs five or more identical ones touching horizontally or vertically. Diagonals do not count. There are no lines at all, the rules sheet says “Fixed 1”, and everything rests on how symbols sit next to each other.

Paid symbols disappear and refill from above while new clusters remain. Removed symbols charge meters, which reset at round end rather than after each drop. The table below preserves original numbers: its unit is unlabelled, so they cannot be called total-bet multiples. The model uses ten coins per stake; whether pays use a coin or total stake needs checking in the client.

HP4 — 5: 10; 6: 20; 7: 30; 8: 50; 9: 80; 10: 200; 12: 400; 15: 1,000.

HP3 — 5: 8; 6: 10; 7: 20; 8: 30; 9: 50; 10: 100; 12: 200; 15: 400.

HP2 — 5: 6; 6: 8; 7: 15; 8: 20; 9: 30; 10: 50; 12: 100; 15: 200.

HP1 — 5: 5; 6: 7; 7: 10; 8: 15; 9: 20; 10: 30; 12: 50; 15: 100.

LP4 and LP3 — 5: 2; 6: 3; 7: 4; 8: 6; 9: 8; 10: 10; 12: 15; 15: 20.

LP2 and LP1 — 5: 1; 6: 2; 7: 3; 8: 4; 9: 6; 10: 8; 12: 10; 15: 15.

Wilds do not pay on their own and substitute for regular symbols. The table lists size thresholds; the supplied text does not explicitly decode intervals between 10, 12 and 15. Several groups may pay together, but numerical comparisons against the stake are unreliable without an established unit.

Four queued quantum effects

Removed symbols charge five gauges. When a gauge fills, a random quantum effect joins the queue. Effects fire only once the cascades have stopped, after which the round goes on: charge builds again, and fresh wins can refill the gauges.

Implosion turns 3–6 symbols Wild and removes neighbours. Alteration selects a one-eyed symbol and changes all matching ones into another type, selecting an available type if none are one-eyed. Demolition removes one-eyed symbols and those matching them. Incision creates a centre Wild and two diagonals of one random symbol. Its diagonal arrangement does not change the edge-connection rule for clusters.

Meter thresholds, effect-selection weights and simultaneous-full-meter resolution order are absent. An effect can create a pay and recharge meters without guaranteeing another cluster. Their presence does not establish typical round length.

Gargantoon and the fluctuating type

When all five gauges are full, the Gargantoon joins the queue. First it adds eight 1×1 Wilds in random places. If no more cascades are possible, it becomes two 2×2 Wilds. After the cascades finish it becomes a single 3×3 Wild. New symbols drop from above to fill the gaps before each step.

Two 2×2 blocks occupy eight cells and the final block nine. Stages are separated by cascades rather than a new paid spin for each. Separately, Gargantoon may add 4–8 Wilds on a non-paying opening spin. Full-charge and dead-spin-assistance frequencies are unknown.

One random one-eyed type is marked as fluctuating on a spin. Its winning cluster leaves two Wilds, rather than two for every symbol in the group. Type-selection and cluster-participation probabilities are undisclosed. Substitutes may join groups without making a pay mandatory.

Energized Toon, return and the limit

The multiplier in this game grows with every win of the round: one-eyed symbols add +1, two-eyed symbols +3. But it can be used only on wins whose cluster includes the Energized Toon. Its spot is chosen at random on each cascade.

The initial coefficient is unspecified and resets at round end. Increment timing relative to pays and several clusters in one step is not decoded. Two one-eyed and one two-eyed wins, for example, add five to the initial value without establishing a final x5 multiplier.

RTP settings are 96.20%, 94.20%, 91.20%, 87.20% and 84.20%. The sheet’s Default 96% label is not the first setting’s precise value; the shortening is unexplained. Risk is 10, very high. Exposure of one million at a stake of 100 gives 10,000x, with stated odds below 1:1,000,000,000. Cap stopping procedure and hit rate are absent.

Reactoonz from 2017 has 96.51% RTP and high risk; Reactoonz 2 from 2020 has 96.20% and high risk. The hundredth has the same main return with a higher volatility rating; its meters and Energized Toon condition change payout structure as well as appearance.

Pros

  • Five charge meters activate different effects before the giant Wild appears.
  • An initially non-winning spin can add four to eight Wilds.

Cons

  • The multiplier applies only to wins containing an energized Toon.
  • There is no bonus buy, and hit frequency is unpublished.

SlotAtlas editorial team

Game details are checked against the studio’s official materials. Demos run on the studio’s server. Found a mistake? Tell us and we will correct it.

How we check game information

FAQ

What stakes are available?

Coin denominations from 0.01 to 10.00 with ten coins give total stakes of 0.10–100.

Can a separate bonus be bought?

The supplied rules sheet lists no buy.

Where is the active return setting shown?

In the rules of the operator’s specific build; a short build label does not replace its precise percentage.

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