Jurassic Kingdom Slot by PG Soft

Five multiplier tiers run simultaneously during free spins, and all five escalate after every single spin. They start at x1, x2, x3, x4, x5. After the first free spin, the whole set shifts to x2, x3, x4, x5, x6. After the fifth, you're looking at x6, x7, x8, x9, x10. Eight spins is the base award from four scatters, so by spin eight the tiers read x9 through x13 - and +1 Free Spin symbols on the reels extend the round further, pushing the entire ladder higher with each extra spin. The cascade multiplier from base game still applies on top, so a late free spin with a long cascade chain stacks the tier multiplier against the per-cascade multiplier. That double-layered scaling is where the 100,000x theoretical ceiling comes from, even if simulated results cap closer to 6,684x.

Base game runs its own escalating multiplier, separate from the free spins tiers. First cascade in a spin pays at x1, second at x2, third at x3, up to x5 where it caps. Resets every new spin. The oversized symbols - taking up 2 to 4 spaces on the grid - are what keep cascades going, because a single large symbol connecting across multiple ways counts once for payout but clears a bigger chunk of the board when it collapses, pulling more fresh symbols down. The way count fluctuates between 64 and 46,656 depending on how many positions each symbol occupies. A grid full of single-space symbols gives you maximum ways; a grid stacked with 4-space blocks gives you fewer ways but more concentrated wins per connection.

Wilds-on-the-Way is a three-step transformation exclusive to reels 2 through 5. Random symbols land with a silver frame. If that silver-framed symbol participates in a win, it transforms into a new random symbol with a gold frame on the next cascade. Win again with the gold frame, and it becomes a full Wild. Silver to gold to Wild across three consecutive cascade rounds - miss a win at any step and the chain breaks. It's a slow conversion, but combined with the big symbols occupying multiple spaces, a gold-framed 3-space symbol that finally turns Wild on the third drop covers a large section of the inner reels. You can buy the free spins directly through the Feature Buy option instead of waiting on four scatters.