Coin Volcano strips away traditional slot mechanics entirely. There are no paylines, no regular spins that pay. The 3x3 grid sits empty with purple spiral patterns until you land any 3 symbols on the middle row. That single line triggers everything.
The main game exists only to collect sticky coins or trigger bonus rounds. Sticky coins appear randomly showing 5x to 9x your bet, stick to their positions, and wait. Change your bet amount and they vanish. Land three symbols in the center row and the screen floods red-orange as the Bonus Game activates.
3 OAKS designed this without scatter symbols or free spin counts. You get 3 respins. Each new symbol that lands resets the counter back to 3. Symbols stick where they land. When respins hit zero or all 9 positions fill, prizes collect. The twist: Mystery symbols only reveal at the end, transforming into coins worth 1x to 4x or into Mini, Minor, Major jackpots.
When Volcano Multipliers Feature activates, the volcano erupts. Between 1 and 9 lava multipliers shoot onto random reel positions. Each multiplier ranges from 2x to 9x. If two multipliers hit the same cell, they add together. A 3x and 4x both landing on position 5 creates a 7x multiplier for that spot.
These multipliers do not apply during the bonus round. They calculate at the end. A coin showing 4x your bet landing on a cell with a 5x multiplier pays 20x your bet total. The Ultra Bonus Game guarantees this feature fires at start and gives better odds of retriggering it mid-round.
Fill all 9 grid positions with any symbols during Bonus or Ultra Bonus Game. The game awards 500x your total bet immediately. This adds to whatever coins, jackpots, and multipliers already collected. Coin Collect symbols count as filled positions. Mystery symbols count before transforming.
The 500x comes on top of existing wins. Land 9 symbols showing various coin values plus their multipliers, collect that total, then receive another 500x bet as the Grand Jackpot bonus. At maximum 50 bet, that is 25,000 in currency plus the accumulated round total.
The 30x buy costs 30.00 at 1.00 bet. You immediately enter Bonus Game with 3 respins and random symbol generation. No guaranteed volcano multipliers. Standard coin values apply. Mini, Minor, Major jackpots can appear randomly through Mystery Jackpot symbols.
The 75x Ultra Bonus buy costs 75.00 at 1.00 bet. Volcano Multipliers Feature fires at the start before any respins. Those multipliers sit on cells and apply to any symbols that land there. Higher retrigger probability means more multiplier eruptions during the round. Worth the extra 45 bet if chasing maximum multiplier stacking.
Current sticky coins do not participate in purchased bonus rounds. They remain on reels for naturally triggered bonuses only. Insufficient balance blocks the purchase option entirely.
The purple gradient main game screen shifts to red-orange lava theme when bonus activates. Grid cells show spiral patterns in base mode, flame patterns during bonus. All coins render with 3D metallic shine and concentric rings. Golden yellow dominates text with red outlines creating depth.
Jackpot meters sit horizontally across top in pill shapes: golden Grand with red text, magenta Major, blue Minor, green Mini. Each shows current value with glow borders. The 3 OAKS logo stays top left corner. Hamburger menu top right accesses rules, language selection, autoplay settings.
Right side control panel stacks circular buttons vertically: sound toggle, turbo spin, hold for turbo, autoplay, menu/info. Bottom bar displays Win, Balance, and Bet across full width. Respin counter appears right side during bonus as circular badge counting down.
Bet range spans 0.10 to 50.00 across 21 preset amounts. The game calculates all prizes as multipliers of total bet, not coin value. No paylines exist. The 3x3 grid has 9 individual positions. Only the middle horizontal row of 3 cells triggers bonus features.
Autoplay function available through A button. Turbo spin activates via fast forward button or hold the dedicated turbo button. Game runs in portrait orientation optimized for mobile. All interactive elements sized for touch input minimum 44x44 pixels.
Language support includes 22 options from Bulgarian to Ukrainian. English selected by default. Game scales maintaining aspect ratio across devices. Balance, bet, and win amounts display constantly. Session info persists across spins.