Bonanza Falls Slot by Big Time Gaming

The hardware borrows straight from the original Bonanza. A four-position minecart rides a rail above the middle reels, and each cart drops one extra symbol onto reels two through five, so those columns can run seven symbols tall while the outer reels stay shorter, pushing the ways count as wide as any Megaways board gets. Every win clears its symbols and pulls fresh ones down from above and in from the right along the carts, with reactions continuing as long as new combinations keep landing. It all sits in a green forest beside a rocky waterfall, part of the same gold-rush mining world as its predecessor, a wooden prospector's shack up on stilts to one side and a water-wheel turning on the other. Cut gems pay the top money, a purple diamond ahead of red, blue and green jewels, with card royals filling the bottom.

Base spins stay fairly plain until a win between 25x and 100x turns up. Land one and the Win Exchange lets you gamble it on a wheel, trading a locked payout for a shot at the free spins instead. Wilds fill in for everything except the Scatter and can carry a multiplier up to x5. Three Scatters open the bonus at 12 spins, and each extra Scatter after that adds another four.

Free spins swap the carts for the Coin Dozer. A coin pusher sits above the grid and shoves one or more Bonus Coins down onto the reels on any spin or reaction. Each coin resolves into one of three outcomes: a Wild worth up to x5, a random symbol dumped onto the board in up to ten copies at once, or a +1 to the win multiplier. That last outcome is what builds the big rounds, since the multiplier only climbs and never resets, stacking through the round while the reactions keep feeding it wins to multiply.

The feature buy hands you the bonus for 100x, and Feature Drop symbols landing in the base game chip that price down. Buys can also roll an enhanced version of the free spins at random.