How to Play Coin Volcano: The Bonus Game Rules
Coin Volcano eliminates traditional base game mechanics entirely — every spin aims to trigger the Hold and Win feature, making gameplay exceptionally focused.
The 30-Second Rules:
- Land three special symbols on the middle row to activate Hold and Win.
- Receive three respins that reset each time a new symbol lands.
- Symbols that land during respins lock in position.
- The round ends when respins exhaust or all nine positions fill.
- Filling the entire 3×3 grid awards the Grand Jackpot at 500x stake.
Jackpots and Special Symbols
| Symbol Type | Function | Payout | Image |
| Regular Coin | Standard prize symbol | 1x–4x bet |  |
| Mini Jackpot Coin | Fixed prize tier | 10x bet |  |
| Minor Jackpot Coin | Mid-tier fixed prize | 20x bet |  |
| Major Jackpot Coin | High-tier fixed prize | 50x bet |  |
| Grand Jackpot | Full grid completion | 500x bet |  |
| Mystery Symbol | Transforms into any symbol except sticky | Variable |  |
| Mystery Jackpot Symbol | Converts only to Mini/Minor/Major jackpots | Variable |  |
| Volcano Multiplier | Applies multiplier to coin values | Up to 9x |  |
| Sticky Coin | Remains on grid until feature triggers | 5x–9x bet |  |
Coin Volcano Slot: Key Specifications
| Specification | Details |
| Provider | 3 Oaks Gaming (Booongo) |
| Release Date | August 2023 |
| Grid Layout | 3×3 (3 reels, 3 rows) |
| Paylines | No traditional paylines—Hold and Win mechanic only |
| RTP | 95.66% |
| Volatility | Medium |
| Max Win | 2,551x bet |
| Bet Range | $0.10–$60 |
| Core Mechanic | Hold and Win with respins |
| Bonus Buy | Yes—30x bet (standard), 75x bet (Ultra Bonus with guaranteed multipliers) |
| Mobile Support | Full iOS/Android optimization, portrait/landscape modes |
| Technology | HTML5, JavaScript |
Demo Game FAQ
This game is intended for players 18+ only. Demo mode uses virtual credits and does not involve real money. RTP is a theoretical indicator calculated over extended periods—results in individual sessions are random and unpredictable. Set limits before playing with real money and seek support if gambling negatively impacts your life.