Developer 3 Coin Volcanoes is a slot from 3 Oaks Gaming released in November 2024. It uses a 4x3 layout with two active lines and a 3-line structure, with bet sizes ranging from 0.1 to 50. Players can use the demo version to play for free and practice before playing for real money.
The main features centre on volcano-themed bonus mechanics. Landing four symbols on either active line triggers three respins in the bonus game, where MINI, MINOR and MAJOR jackpots can appear. A Mystery Jackpot Symbol may reveal one of these prizes, while the Mystery Symbol changes into another symbol. The Boost Symbol collects current values, and filling the screen can award the GRAND JACKPOT.
During the base game, bonus symbols can activate one or more volcanoes above the reels through green, red and blue fire effects. This opens the bonus game with boosters such as LIFE, which refills the respin counter; MULTI, which adds multipliers that combine in the same cell; and GROW, which adds two extra rows. If the expanded grid is filled while GROW is active, the ROYAL JACKPOT is awarded. A Lucky Eruption feature can also trigger the bonus game with at least two boosters.
