The original seven-by-seven grid
Play’n GO’s original Reactoonz has a 7 × 7 grid and pays qualifying clusters of at least five matching aliens. Wild symbols can help a group qualify. Paid aliens disappear and new ones enter from above.
For a reading exercise, imagine a connected group of five matching aliens and another matching alien separated from it. The group can qualify; the isolated alien does not automatically increase its size to six. This is a different question from counting identical symbols anywhere in Gates of Olympus.
A cascade can continue one paid round
A replacement grid is evaluated again. Winning clusters also contribute energy towards the feature system. A round can therefore contain several visual events after the initial stake has already been taken.
Worked mechanics example
Suppose one illustrative cascade awards £0.30 and a second awards £0.70. Together they return £1. If the original stake was £0.40, the round’s net change is +£0.60. Two paid clusters are not two separate £1 returns, nor do they mean two new stakes were charged.
Energy and payment are different counters
The supplier’s original-game explanation describes Quantum features and Gargantoon entering as a large 3 × 3 wild, then splitting through cascades. A Quantum effect can change the field before a later evaluation produces a payment.
Keep three notes when watching a complicated sequence: what was removed, what the feature changed and what the game actually awarded. An energy bar records progression under the rules. It does not represent cash waiting to be withdrawn, and being close to a feature does not guarantee a particular next outcome.
Do not import the sequel’s machinery
Reactoonz 2, Gigantoonz and Reactoonz 100 are distinct games. The original’s Quantum system should not be described using a sequel’s differently named meters or multiplier ceiling. Check the complete title before comparing a clip or information panel.
There is no universal RTP asserted here: the reviewed original-game overview does not settle every operator configuration. A field copied from a sequel would add false precision. Our RTP guide explains which number belongs to the installed version.
Why it belongs in the British selection
Play’n GO has specifically identified the UK among markets where the original Reactoonz was heavily played. That is historical supplier evidence of local interest, not a current independent popularity ranking. It complements the section’s fixed-line and tumble games with a cluster-and-meter example.
For another cluster structure, read Jammin’ Jars. Before using a casino offer, check bonus terms for game eligibility; explaining the original does not establish that every UK catalogue currently lists it.
Questions, answered
Is an energy increase itself a cash win?
No. It tracks feature progression; use the awarded-win display for money.
Does this cover Reactoonz 100?
No. The original edition is separate from Reactoonz 100 and Reactoonz 2.
Must a cluster contain five symbols?
Five is the minimum; larger qualifying connected groups can also pay.
Sources & updates
- Reactoonz — Play’n GO supplier pageChecked 2026-09-21
- Play’n GO original Reactoonz feature explanationChecked 2026-09-21
- Play’n GO historical UK interest in original ReactoonzChecked 2026-09-21



