The volcano line from 3 Oaks Gaming began in August 2023 with Coin Volcano. Its setting is a volcanic island, and the mountain at the centre of it erupts with multipliers. The grid is small, three by three, which keeps the action easy to follow and sets the pattern that later titles expand on.
Starting the bonus
Three symbols on the middle row activate three respins of the Bonus Game. A Sticky Coin stays locked in place until the respins trigger, which raises the chance of the bonus being activated. A Volcano Metre also fills with every symbol on an active line, and once it is full the bonus starts.
During the respins
- Bonus symbols carrying different values can be collected.
- Mini, Minor and Major jackpots are in play.
- A Mystery Jackpot symbol reveals one of those three prizes.
- A Mystery symbol can become any symbol other than the Sticky Coin.
- A Collect symbol gathers all the coin values on display.
Filling the whole grid may award the Grand jackpot of x500.
Multipliers and the Ultra Bonus
The Volcano Multiplier Feature may switch on at random during the respins, putting from one to nine volcano multipliers on the reels. The Ultra Bonus Game also triggers at random, and it guarantees that a Volcano Multiplier Feature is in place when the round begins.
What is missing from the picture
The official page gives a month of release but no return percentage, volatility, maximum win or bet range, so this site states none of them. The x500 is the multiple for the Grand jackpot alone.
Why it matters for a player
Because the game is compact, it is a convenient place to learn the vocabulary the whole series uses. Even so, simple rules do not make outcomes predictable, and nothing in the bonus responds to skill. Set a spending limit before you play and read the in-game rules. Our Coin Volcano page lists the verified details.