Paylines
20 fixed paylines (left-to-right)
5,000x. That's the Grand Jackpot ceiling, and you'll only see it by stacking 40 Fireballs through one continuous Hold and Win round. It's a steep ask, but the path to get there is what makes Fire Eruption worth a look. OctoPlay built this one around vertical motion, not the usual sit-and-spin loop, and the rules reward patience in a genuinely unusual way.
Here's the setup. 5×4 grid, fruit and lava-sevens for the base symbols, 20 fixed paylines running left to right. Wilds substitute everything except Fireballs and the Volcano. Up to five Fireballs land per spin, but here's the twist: they show up empty. Zero prize attached. Every spin, each Fireball climbs one row toward the top. The only way to cash one out is when a Volcano symbol lands somewhere on the grid and activates every active Fireball at once.
The climb mechanic has its own reward layer. There are three Fireball tiers, paying 1x to 2x, 3x to 5x, and 10x to 15x of stake. When a tier-1 or tier-2 Fireball crosses from row 3 to row 2, it upgrades to the next tier. When a tier-3 Fireball makes that same crossing, its prize doubles instead. So Fireballs that land on reel 1 and survive five spins are dramatically more valuable than the ones that drop on row 4 and exit the next spin. Is the timing predictable? Not really. You can stare at a near-perfect setup and watch the Volcano refuse to show up.
Hold and Win triggers when enough Fireballs fire upward into the lava pit above the reels. The bonus strips the grid down to Fireballs, Fire Shamans, and empty cells. Every Fireball that lands now arrives pre-loaded with cash. Fire Shamans drop sticky x2, x3, or x5 multipliers that camp on their landing spot for the rest of the round, and any Fireball that passes through one gets its prize boosted. Stack a tier-3 Fireball through a x5 multiplier and you might push it into the next tier entirely. The round only ends when no Fireballs remain and a spin lands no specials.
The 4-tier jackpot ladder pays Mini 15x, Minor 30x, Major 150x, and Grand 5,000x at 10, 20, 30, and 40 Fireballs collected during that single bonus. There's a Buy Bonus and a Double Chance ante for the impatient. The high-volatility tag is honest, the math is opaque without the in-game info, and the Pele-style fire goddess art is more polished than most fruit reskins manage.