Play'n GOPlay'n GO

    EnergOOnz

    9.1/10
    Release December 2013· Updated June 2026

    Play'n GO's first cluster pays slot — RTP 96.69%, max win 18,566x

    RTP
    96.69%
    Volatility
    High
    Max Win
    18 566x
    Grid
    5x5
    Bonus Buy
    No
    Cluster PaysCascading WinsEnergy ChargeWilds Random
    EnergOOnz
    🎰

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    9.1

    BetsRank Verdict

    Hands-on testing by Alexandre Dubois — bonus tested, multiple sessions

    Play'n GO's first cluster pays slot (2013) — the ancestor of Reactoonz/Moon Princess. RTP 96.69% — the highest in the Play'n GO catalogue. An alien sci-fi theme with a mascot that foreshadows Reactoonz. Energy Charge bonus mode. A very high max win of 18,566x for 2013.

    Strengths

    • +RTP of 96.69%, the highest in the Play'n GO catalogue
    • +The studio's first cluster pays slot
    • +Max win of 18,566x — high for 2013
    • +The ancestor of the iconic Reactoonz saga

    To consider

    • 2013-era format — old-school mechanics
    • No bonus buy
    • Minimum bet of 0.20€ (vs the usual 0.10€)

    About EnergOOnz

    EnergOOnz (December 2013) is the very first cluster pays slot ever released by Play'n GO — the pioneer of a format that would become the studio's signature with Reactoonz (2017), Moon Princess (2018), Honey Rush (2019), and Sweet Alchemy (2017). An alien sci-fi theme, with cyan neon visuals that visually foreshadow the Reactoonz saga. The structure: a 5x5 grid, cluster pays (3+ matching adjacent symbols = a win), stakes from 0.20€ to 100€. Top-tier RTP of 96.69% — one of the highest in the Play'n GO catalogue, even above Sea Hunter (96.63%) and Honey Rush (96.54%). Reduced-RTP configurations may be available depending on the casino. High volatility. The mechanic: winning symbols disappear, new ones fall in — classic cascading wins for a cluster pays title. The slot introduces the Energy Charge feature, ancestor of the Rush Meters and Quantum Features that would populate later titles. Every win fills up the energy meter. At the threshold, a random bonus mode is triggered: added wilds, transformation of low symbols into high ones, temporary multipliers. A max win of 18,566x — a surprisingly high number for a 2013 slot. The cap reflects the studio's bold philosophy at the time, when the competition (NetEnt's Gonzo's Quest, 2011; Microgaming's Mega Moolah) capped much lower. Ideal for cluster pays fans looking for the founding Play'n GO title, studio collectors/historians, and RTP hunters (96.69% is top of the catalogue). Not for players chasing bonus buy or modern mechanics.

    Key features

    • Play'n GO's first cluster pays slot — the founding title of the format at the studio (December 2013). Precedes Reactoonz/Moon Princess/Honey Rush.
    • Top-tier RTP of 96.69% — one of the highest RTPs in the Play'n GO catalogue, above Sea Hunter (96.63%) and Honey Rush (96.54%).
    • Energy Charge — a bonus meter that's the ancestor of the Rush Meters. At full charge, it triggers random modifiers (wilds, transforms, multipliers).
    • 5x5 cluster pays — 3+ matching adjacent symbols (horizontal/vertical) generate a win. Classic cascading wins on a standard 5x5 cluster grid.
    • Max win of 18,566x — an exceptional cap for 2013, reflecting Play'n GO's early ambition versus the competition's much lower caps at the time.
    • Alien sci-fi theme — futuristic neon aesthetic that visually foreshadows the Reactoonz saga (alien mascot).

    EnergOOnz FAQ

    What is the RTP of EnergOOnz?

    The official top-tier RTP is 96.

    69% — one of the highest in the Play'n GO catalogue. Reduced configurations may be available depending on the casino. Check via the in-game 'i' info button.

    Is EnergOOnz available at online casinos?

    Yes — at international online casinos that carry Play'n GO.

    Availability varies by casino (as a 2013 slot, it's sometimes removed from libraries).

    EnergOOnz vs Reactoonz?

    EnergOOnz (2013): Play'n GO's first cluster pays slot, RTP 96.

    69%, max win 18,566x. Reactoonz (2017): the spiritual sequel with modern Quantum Features, RTP 96. 51%, max win 4,570x. The two share the alien theme.

    Why is the RTP so high?

    A 2013 design choice — Play'n GO was testing the cluster pays format and opted for an attractive RTP to gain traction.

    Later titles (Reactoonz 96. 51%, Honey Rush 96. 54%) remain high but sit below EnergOOnz.

    Who is this slot for?

    Cluster pays fans looking for the Play'n GO founding title.

    Studio collectors/historians. RTP hunters (96. 69% top of the catalogue).

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    Slot sheet last updated on · Sources: slotcatalog.com, official provider sites, BetsRank hands-on testing