Bonanza Megaways is the slot that changed the industry. When Big Time Gaming released it in 2016, the Megaways mechanic was new and barely understood. Within two years, every major studio was either licensing the patent or developing its own alternative. Bonanza is the original, and it still holds up.

The Megaways engine dynamically alters the number of symbols on each reel with every spin, creating a varying number of ways to win — up to 117,649 on this six-reel setup. An additional horizontal reel sits above the top three main reels, adding a horizontal matching element that contributes to wins. Wins are paid left to right on adjacent reels rather than fixed paylines, and a cascade mechanic removes winning symbols and replaces them with new ones, allowing for multiple wins from a single spin.

The bonus is triggered by landing four or more scatter symbols spelling G-O-L-D anywhere on the reels. This awards twelve free spins. During the free spins, every cascade win increases a progressive multiplier that starts at 1x and has no upper limit — it simply keeps climbing with each winning cascade. This unlimited multiplier is the engine of Bonanza's legendary status; documented wins have exceeded 10,000 times the stake in a single free spins round.

Reactions (cascades) occur in the base game too, though without the escalating multiplier. The horizontal reel above reels two, three, and four adds a layer of visual complexity and additional winning combinations not found in most competing titles.

The gold mine setting, the cheerful banjo soundtrack, and the satisfying cascade animation have all aged well. At very high volatility, Bonanza demands patience and a managed bankroll. The free spins can be elusive and can underperform when they do arrive, but when the multiplier climbs into double figures, the results are unforgettable.