Mystery and Collect Symbols Expand the Coin Volcano Bonus Round

3 Oaks Gaming adds several special symbol functions to the familiar coin-respin format in Coin Volcano, a 3×3 slot featuring Mystery Symbols, Collect mechanics and four fixed jackpots.

The main Bonus Game begins with three respins. Coin symbols that appear during the round remain locked on the grid and display individual values.

The Collect Symbol interacts with the coins already visible. When it appears, it gathers their displayed values, meaning its result depends on the current state of the grid.

A Collect Symbol landing early in the round may have only a small number of coins available. The same symbol appearing after several positions have been filled can gather a larger group of values.

Mystery Symbols introduce a different type of event. After landing, they reveal an eligible symbol and add the result directly to the existing grid.

The Mystery Jackpot Symbol is linked specifically to the game’s fixed prizes. It can reveal a Mini, Minor or Major Jackpot, while the Grand Jackpot is connected to filling all nine reel positions.

Coin Volcano also includes Volcano Multipliers. During the standard bonus, an eruption may place multipliers across one or more positions. In the Ultra Bonus Game, a multiplier event is guaranteed from the beginning.

All these elements remain inside the same compact layout. Mystery transformations do not open a separate screen, and the Collect mechanic operates on the values already shown on the reels.

The game’s volcanic environment provides a visual background for these events, with eruptions introducing multiplier positions and glowing effects highlighting the coin symbols.

By combining Mystery reveals, coin collection and jackpot prizes within a nine-cell grid, Coin Volcano adds variation to the Hold and Win format without moving away from its central respin structure.

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