How additive stacking works, when Coin Collect interacts with multipliers, and the exact math behind the 2,551× max win.
Click cells to place coins, then add multipliers to see how values stack.
Exactly how the game calculates each position's contribution.
Volcano Multipliers are applied at the end of the bonus round, after all respins have completed and all Mystery symbols have revealed their final form. This is important: the multipliers don't affect ongoing respin behavior — they're a final calculation layer.
The Coin Collect symbol (the volcano vent) collects all current coin values on screen, including their multiplier-enhanced values. So if a 3× coin has a 5× Volcano Multiplier attached, Coin Collect gathers 15× — not 3×.
After Coin Collect fires, those cells become empty and the Collect symbol sticks. On the next respin, new symbols can fill those empty cells. Critically, Coin Collect can trigger multiple times in one bonus round — but cannot collect values from a previous Coin Collect symbol.
One Volcano Multiplier activation places 1–9 multiplier values onto random grid positions. A single activation can drop multiple multipliers on the same cell (stacking) or spread across different cells. Multiple Volcano Multiplier events can occur in a single bonus round.
In the Ultra Bonus (triggered randomly or purchased for 75×), at least one Volcano Multiplier activation is guaranteed to fire at the start of the bonus round. This means your coins are already multiplied from respin #1, and any additional multiplier events stack further on top.
In the standard Hold & Win bonus, multiplier activation is random and may not occur at all.
The visualizer above shows the math. Demo mode shows the visual experience.
Open Coin Volcano →18+ · Responsible gambling