Mystery Mice

Mystery Mice is a 6x6 cluster-pays slot from Pragmatic Play released in September 2024. 96.49% RTP, high volatility (5/5), 5,000x maximum win. Wins form on five or more adjacent matching symbols on the grid; a tumble mechanic removes winners and cascades replacements. Power Wilds are the defining feature — level 1 to 10 wilds that remain sticky on the grid during tumble chains, persisting as long as their level stays above zero. Each tumble cycle that the Power Wild participates in reduces its level by one.

Power Wild Level-Up symbols increase a Power Wild's level by 1 to 3, extending its active lifespan on the grid. Three or more spyglass scatter symbols trigger the free-spin round — 10 to 18 base spins, with each triggering scatter beyond the minimum awarding extra spins. During free spins, Power Wilds retain their sticky persistence until their level reaches zero or the bonus ends; landing two or more scatters mid-bonus adds one additional free spin.

The Power Wild's level system changes how cluster formation works. A level 8 wild sitting in the centre of the 6x6 grid participates in multiple tumble sequences, potentially bridging otherwise disconnected clusters into winning combinations across eight consecutive chain events. High-level Power Wilds landed during the bonus round are the session's structural payoff — their extended persistence turns individual bonus spins into multi-chain events.

The 5,000x ceiling is achievable through a free-spin round where high-level Power Wilds remain active during a sequence of large cluster formations. The 96.49% RTP is competitive in the PP cluster high-volatility tier and compares well against Fruity Treats (96.05%) and Gears of Horus (96.09%) for similar ceiling targets. A bonus-buy feature is available for players who want direct bonus access.

Verdict
Leveled sticky Power Wilds on a 6x6 cluster grid. A durable wild system with genuine depth — 5,000x ceiling and competitive RTP make it a strong mid-tier cluster entry.