Sticky Coins award 5x to 9x Total Bet and remain locked on reels until Bonus Game triggers. Land them in main game, watch them accumulate. Change your bet and sticky coins reset - strategic betting required.
Start with 3 respins in Bonus Game. Each new symbol landing resets counter back to 3. Fill all 9 positions or run out of respins to end the round. Every spin counts with this volatile mechanic.
Random volcano eruptions shoot 1 to 9 lava multipliers onto grid positions during bonus rounds. Multiple multipliers on same cell stack together. All multipliers apply at round end for massive potential wins.
Mystery symbols transform into any regular symbol except Sticky Coin. Mystery Jackpot converts exclusively into Mini (10x), Minor (20x), or Major (50x). Reveals happen one by one at bonus end for suspenseful payouts.
This symbol instantly gathers all coin and jackpot prizes from visible reels. Multipliers apply before collection. After collecting, symbol sticks until bonus ends, potentially collecting multiple times per round.
Purchase standard Bonus Game for 30x bet or Ultra Bonus Game for 75x bet. Ultra guarantees Volcano Multipliers at start plus higher retrigger chances. Current sticky coins don't participate in purchased bonuses.
This 3x3 grid slot from 3 OAKS eliminates traditional paylines completely. Instead, landing any 3 symbols on the middle row activates the respin bonus. The grid uses a hold-and-respin mechanic where triggering symbols stick while empty positions respin.
Main game serves primarily as bonus trigger. Coins display values from 1x to 4x your total bet. The real action happens when middle row fills, transitioning background from purple gradient to red-orange lava theme indicating bonus activation.
Grand Jackpot triggers only when you collect all 9 grid positions with symbols during Bonus or Ultra Bonus rounds. This adds 500x your total bet on top of collected coin values. With maximum 50.00 bet, Grand Jackpot alone pays 25,000.00.
Strategic consideration: Lower-value coins filling the grid still trigger Grand Jackpot. A grid of nine 1x coins (9.00 total) plus 500x Grand equals 509x total win. Compare this to partial fills with higher multipliers to understand variance.
Sticky Coins appear randomly in main game showing multipliers between 5x and 9x. They persist through spins until bonus triggers. However, changing your bet clears all sticky coins immediately.
This creates a commitment dynamic: accumulate stickies at one bet level, or risk losing them to adjust stakes. If you've collected multiple 9x stickies, triggering bonus becomes priority before bet changes.
Important: Sticky Coins DON'T count toward middle-row trigger requirement. You need 3 standard symbols on middle row even with stickies present elsewhere.
When Volcano Multipliers feature activates, the volcano shoots 1 to 9 multiplier values onto random grid positions. Each position can receive multiple multipliers that stack additively.
Example scenario: Position holds 3x coin. Volcano shoots two multipliers there - 2x and 4x. Final calculation: 3.00 x (2 + 4) = 18.00 for that position. This stacking mechanic creates the slot's highest volatility moments.
Multipliers apply at bonus round conclusion, after all respins complete and Mystery symbols reveal. This delayed application builds anticipation through the entire feature.
Standard Bonus costs 30x bet. Ultra Bonus costs 75x bet but guarantees Volcano Multipliers at start. Standard bonus may or may not trigger volcano feature randomly.
Mathematical comparison at 1.00 bet: Standard costs 30.00 with chance of multipliers. Ultra costs 75.00 with guaranteed multipliers plus higher retrigger probability. Ultra requires 2.5x the return of standard to break even.
Ultra becomes more valuable when pursuing maximum wins rather than bonus frequency. If your goal is hitting high multiplier combinations, the guarantee justifies the premium cost.
Mystery Jackpot symbols transform exclusively into Mini (10x), Minor (20x), or Major (50x) jackpots. The game doesn't reveal conversion probabilities, but observing the rarity: Major appears less frequently than Minor, which appears less than Mini.
When multiple Mystery Jackpots land in bonus round, they reveal sequentially. This creates scenarios where early reveals inform expectations for remaining mysteries. Each reveal is independent, but the sequential unveiling affects player experience.
Regular Mystery symbols have wider conversion range, becoming any symbol except Sticky Coin. This includes standard coins (1x-4x) and the three jackpot tiers, making them more versatile than Mystery Jackpot symbols.
The 3x3 grid contains 9 positions but only the middle row (3 positions) serves as trigger line. This means 33% of grid positions contribute to bonus activation while 66% serve as holding positions for respin mechanics.
During respins, new symbols can land anywhere on the 9-position grid. Each empty position spins independently. When grids approach full (7-8 symbols), the final 1-2 respins become high-pressure moments determining Grand Jackpot possibility.
Coin Collect symbol gathers all visible prizes immediately upon landing. Timing matters: landing Coin Collect early in bonus collects fewer prizes but then sticks for potential later collections if more coins land during remaining respins.
Late Coin Collect landing (respin 2 or 3) collects more accumulated prizes but provides fewer opportunities for repeat collections. The symbol's value depends entirely on grid state when it lands.
Multipliers apply before collection. If you have 3x coin with 5x multiplier, Coin Collect gathers 15x, not 3x. This makes Coin Collect devastating when combined with Volcano Multipliers feature.
| Game Type | Video Slot with Hold & Respin |
| Grid Layout | 3 columns x 3 rows (9 positions) |
| Trigger Mechanism | 3 symbols on middle row |
| Bet Range | 0.10 to 50.00 |
| Maximum Win | 500x (Grand Jackpot) + coin values + multipliers |
| Bonus Purchase | 30x (standard) / 75x (ultra) |
| Coin Values | 1x, 2x, 3x, 4x (standard) / 5x-9x (sticky) |
| Multiplier Range | 2x to 9x (volcano feature) |
| Initial Respins | 3 (resets with each new symbol) |
Jackpot meters display at top of screen showing current values. Mini, Minor, and Major appear as symbols during bonus rounds. Grand Jackpot awards only through complete 9-symbol collection, not as a landable symbol.
Coin Volcano uses background color to communicate game state clearly. Purple gradient indicates main game with standard symbol possibilities. When bonus triggers, entire interface shifts to red-orange lava theme with fire effects.
This visual transformation helps players immediately recognize bonus activation even before respin counter appears. Grid cells change from purple spiral patterns to red lava patterns. The shift creates psychological impact amplifying excitement.
3 OAKS
3 OAKS develops slots emphasizing mathematical mechanics over elaborate storylines. Coin Volcano exemplifies their approach: clear grid structure, transparent multiplier math, and bonus-buy options letting players control feature access.
Their slots typically feature high volatility with concentration of value in bonus rounds rather than base game hits. This design philosophy suits players seeking longer gameplay punctuated by significant feature wins.
Coin Volcano demonstrates high volatility through multiple factors: main game provides minimal returns, value concentrates in bonus features, Grand Jackpot requires rare complete grid fills, and Volcano Multipliers add variance through random triggering and stacking.
Expect extended periods collecting sticky coins and attempting bonus triggers between substantial wins. The 500x Grand Jackpot represents the ceiling, but typical bonus rounds pay 20x-100x depending on coin values, multipliers, and jackpot symbol appearances.
Buy bonus options don't reduce volatility - they shift it from trigger frequency to feature outcome variance. Purchasing Ultra Bonus for 75x guarantees multipliers but not profitable outcomes.
Coin Volcano's bet-changing consequences (sticky coin removal) encourage bet consistency. Decide your bet level before accumulating stickies. If you collect multiple high-value stickies (8x, 9x), maintain that bet until bonus triggers.
Bonus buy costs scale with bet: 30x for standard, 75x for ultra. At 1.00 bet, standard costs 30.00. At 5.00 bet, standard costs 150.00. Your bankroll determines sustainable buy-bonus frequency.
Consider bankroll division: if you have 500.00 for session, buying bonuses at 5.00 bet level (150.00 per purchase) limits you to 3 attempts. Reducing to 2.00 bet (60.00 per purchase) enables 8 attempts with greater sampling of feature variance.