Bonanza Slot

Above reels two, three, four, and five, you will notice a separate horizontal reel with mine carts. Each cart carries one symbol that acts as an extra position on the reel directly below it. That means middle reels can show up to seven symbols on a spin, which is a big part of how the Megaways count climbs. During reactions, only the cart symbols involved in a win are replaced, which helps keep potential alive during a cascade.

The main bonus triggers when you land four scatters spelling GOLD across the reels. This awards twelve free spins. Any extra scatter beyond the four adds five additional spins to the starting total. During the feature, the progressive win multiplier sits in the top corner. It starts at one and increases by one after every reaction, not after every spin. That detail matters. A single spin that chains five times will move the multiplier from one to six, and all wins in that chain use the updated value.

Additional scatters during free spins appear only in the carts. Landing three scatters adds five extra spins, while four scatters adds ten. Since the multiplier never resets during the feature, deep bonus rounds with many reactions are where most of the huge Bonanza screenshots come from. There is no official bonus buy feature in the original Bonanza release, so every free spins entry has to come from natural play.