Gigantoonz

Gigantoonz, developed by Play’n GO, features an 8×8 grid and utilizes a cluster pays system where wins are achieved by landing six or more matching symbols either horizontally or vertically. Set in the whimsical Reactoonz universe filled with quirky alien characters, the game showcases colorful, cartoon-style energoon creatures against a sci-fi backdrop. Instead of a free spins feature, the excitement of the game is derived solely from its base game elements. One notable feature is the appearance of Mega Symbols, which can range in size from 2×2 to 7×7. These Mega Symbols count as a single symbol in a winning cluster but possess a random cluster value, and upon being cleared, they leave behind a Wild. Additionally, a non-winning spin may activate Quantum Wilds, introducing between 5 and 10 wild symbols to the grid. The Quantumeter meter fills with every symbol involved in a winning cluster, with regular symbols contributing one charge and Mega Symbols adding their full cluster value. Once the Quantumeter hits specific thresholds, it triggers a sequence of modifiers: Disintegration at 25 charges removes four random symbols, Metamorphosis at 50 charges transforms all instances of one symbol type, Radiation at 75 charges adds Mega Symbols and more Quantum Wilds, and finally, at 100 charges, the Gargantoonz modifier turns all Mega Symbols into Gargantoonz Mega Wilds while ensuring some appear and then breaking them into 1×1 wilds. The cascading mechanic allows for new symbols to fall into place after winning clusters are removed, continuing until no further wins can be achieved. In Gigantoonz, players can potentially win up to 4,000 times their stake.

You can play it for real money.