Coin Volcano
Bankroll Calculator

Trigger condition

To enter the bonus, you need any 3 symbols on the middle row simultaneously on a single spin. Sticky Coins (which appear randomly in base game) do not count toward this trigger — you still need 3 new symbols on the middle row during one spin.

The respin loop

Once triggered, you receive 3 respins. Every symbol that lands sticks. Every new sticky symbol resets the counter back to 3. The round ends when either the counter hits zero, or all 9 grid positions are filled.

What can land

• Coin (1×–4×): Standard coins. Value = face multiplier × your bet.
• Sticky Coin (5×–9×): Higher-value variant that can appear in base game and stick until bonus.
• Jackpot coins: Mini (10×), Minor (20×), Major (50×) — three of any one type wins it.
• Grand Jackpot (500×): Awarded only by filling all 9 cells — not a symbol you collect.
• Mystery: Reveals at round end into any symbol except Sticky Coin.
• Coin Collect (volcano vent): Instantly sums all coin values on screen, frees those cells. Can trigger multiple times.
• Volcano Multiplier: Randomly shoots multiplier values (1×–9×) onto grid positions. Stacks additively.

Full grid = Grand Jackpot?

Yes, but the Grand Jackpot (500×) is separate from coin values. If you fill the grid AND have a coin worth 4× with a 5× Volcano Multiplier, you collect both the 20× coin value and the 500× Grand Jackpot. The 2,551× max win requires stacked multipliers on top of the Grand Jackpot scenario.