Lucky Piggy Slot by PG Soft

Two types of Wild, and the distinction between them is what makes the whole bonus round work. Regular Wilds land on reels 3 through 6, substitute for everything except the Scatter Wild, and disappear after a cascade resolves. Scatter Wilds also land on those same four reels and substitute for every symbol with no exceptions - but they stick. During any spin, base game or bonus, a Scatter Wild that appears stays locked in place until that spin sequence ends. In a single base game spin with collapsing reels, that means a Scatter Wild persists through every cascade in the chain, quietly filling gaps that regular Wilds would have vacated.

Four Scatter Wilds on reels 3 through 6 in one spin trigger 8 free spins, with 2 extra for each additional Scatter Wild beyond four. Every Scatter Wild that triggered the round stays frozen on the grid for the entire feature - not just one spin, all of them. And during free spins, any new Scatter Wild that drops in adds 1 extra spin and locks into its position permanently too. So the grid accumulates sticky Wilds spin after spin, each one a universal substitute that never leaves. The escalating multiplier runs parallel: it starts at x1, climbs by 1 for every winning cascade, and doesn't reset between free spins. A cascade chain in spin 3 that pushes the multiplier to x7 means spin 4 starts at x7. More sticky Wilds on the grid means more winning combinations per spin, longer cascade chains, and faster multiplier growth. The feedback loop between sticky Wilds and the persistent multiplier is where the 20,000x ceiling lives. Buying the feature skips the scatter hunt entirely, dropping you straight into the bonus with the trigger Scatter Wilds already placed.

The asymmetric grid - three rows on reels 1 and 2, four on reels 3 through 6 - puts 22 total positions in play across 2,304 ways. The wider right side is where both Wild types land exclusively, which concentrates all the interesting action onto those 16 positions. Cartoon piggy banks in pastel pinks and warm golds fill the background, with the lucky pig mascot clutching coins against a funfair backdrop of spinning wheels and bunting. Simulated max win across a billion spins came in at 3,687x, so while 20,000x is the theoretical cap, expect the multiplier-plus-sticky-Wild engine to land well below that ceiling in practice.