Volcano Slot by MGA

Mechanics and bonus structure

Volcano's base game is deliberately lean: three reels, one payline, and a resolution that only checks the middle line for a match. There is no cascading or multi-way format here; the game plays like an old-school fruit machine at its core, with the interest coming from what surrounds that simple structure rather than the line mechanic itself.

Holds and nudges are the base game's main additions. A hold lets a player lock a reel in place for a following spin, and a nudge shifts a reel by one position after the reels stop, both aimed at pulling a near-miss into a paying line. These features are consistently mentioned across the material as core to how a session actually feels, turning a basic three-reel spin into something more interactive.

The bigger structural feature is the split between a lower game and an upper game. Landing three lions in the lower game reportedly triggers a raffle-style pick bonus, while three ornate stone symbols in the upper game trigger a wheel-style round, three elephants trigger an add-a-prize game, and three hats trigger a paths game. One source also describes a prize gauge in the upper game that fills with consecutive wins and can release surprise cash awards.

Free spins are listed among the game's features in one summary, but no source lays out a fixed spin count, retrigger condition, or complete rule set for a standalone free-spin round. Given that gap in the available material, the free-spin mechanic should be treated as unconfirmed rather than assumed to work like a typical modern feature.

Symbol-wise, the lower game carries standard fruit icons while the upper game introduces bonus-oriented symbols such as blue diamonds, blue Lucky 7s, elephants, hats, and lions. Blue diamonds and blue Lucky 7s are reported as the top-paying regular combination, reaching the game's 1,000x stake ceiling on three of a kind, though a full official paytable for every icon is not published in the sources reviewed.