Volcanizer slot from Formula Spin: BONUS GAME up to x999

Volcanizer is the Formula Spin slot in which three BONUS symbols set off the BONUS GAME: random digits appear one by one and build a final multiplier somewhere between x1 and x999. All of it plays out on a small grid of three reels and three rows.

Lava, volcanoes and fruit

The grid stands under three lava-veined volcanoes, with the VOLCANIZER logo between them and glowing lava across the background. The BONUS symbol matches the setting: a cracked ball of molten rock carrying the word BONUS.

Eight regular symbols share the reels: triple 7, a pair of stars, double BAR, grapes, plums, oranges, lemons and cherries.

Triggering the BONUS GAME

BONUS symbols can land on every reel, and three of them start the feature. Where they sit on the grid does not matter.

Once the round begins, digits are generated at random and uncovered one after another, from right to left. Together they form the final multiplier, which can be anything from x1 to x999. The rules screen pictures this as three volcanoes, each topped by a burning digit.

Buying the feature

Players who don't want to wait for three BONUS symbols can press BUY BG on the game screen and get the BONUS GAME outright for 80 times the bet.

Feature	Volcanizer
Developer	Formula Spin
Grid	3 reels × 3 rows
Paying combination	three of a kind
Bonus trigger	3 BONUS symbols in any position
BONUS GAME multiplier	x1 to x999
Feature buy	80× the bet

Return to player is left out on purpose: the developer ships several RTP versions, and the one running here is not shown. The Formula Spin studio page gathers its other releases.

Every other studio on the site appears in the full list of game providers.

How the base game pays

Each symbol has a single paying combination: three of a kind. Triple 7 tops the paytable, stars come second and double BAR third. Grapes, plums, oranges and lemons pay the same amount, while cherries pay the least. Exact values are listed on the Game info screen behind the "i" button.