Rush Riches Slot by Evoplay

A 5x5 grid where 3 to 15 rock symbols randomly block positions at the start of each spin, cutting the active ways count below the theoretical 3,125 maximum. Winning symbols explode and take adjacent rocks with them - left, right, above, below - opening new paths for the cascading symbols that drop in to fill the gaps. Fresh rocks never appear during a cascade chain, so a strong opening win can strip the board clean.

Clear every rock in a single round and you trigger 8 free spins. The free spins board swaps regular rocks for nuggets: silver ones add x1 to a progressive win multiplier (starting at x1), gold ones add +1 extra spin. The multiplier applies to the total round win after all cascades resolve, and it never resets between spins. Clear all rocks and nuggets during the bonus and you pocket 3 extra spins on top.

Bonus Chance doubles the natural trigger rate for 1.8x your bet - payouts still calculate on the base stake, not the inflated cost. The buy-in at 103x skips straight to 8 free spins. Five high-pay symbols top out at 4x per way for five of a kind, which stacks fast when multiple instances line up across the reels. The cascade mechanic paired with rock destruction creates a feedback loop: every win removes blockers, increasing ways, increasing the chance of follow-up wins.

The visual package leans into gold rush nostalgia - painted mountain valley, wooden mine buildings, copper mine cart tracks. Card royals in earthy tones, mining tools in warm bronze. Nothing flashy, just solid production on a high-variance foundation.