Secret Ball Slot by BigPot Gaming

One scatter in the center position. That's all it takes to start free spins - not three across the reels, not a specific payline, just a single crowned crystal ball landing dead center on reel 3. It's a stripped-down trigger for a feature that builds complexity as it runs.

Once free spins start, the game picks a random paying symbol as the Secret Symbol. When that symbol forms a win, it expands across the reel it landed on - separate from the normal 15 paylines, so these expanded wins pay on top of whatever standard line hits you already collected. And then two things happen: you get extra free spins added to the counter, and a new Secret Symbol joins the rotation. So the second Secret Symbol win expands a different icon, awards more spins, and adds a third Secret Symbol to the pool. The round feeds itself. Early exits with one quiet symbol are common, but a chain that keeps hitting builds both the spin count and the number of expanding symbols active at once. That layered accumulation is where the 3,000x ceiling lives - modest by modern standards, but the mechanic earns its wins through stacking rather than raw multiplier math.

Bronze riveted panels and dark honeycomb metal wrap the grid, with every symbol sitting inside a polished glass orb - card values in silver and colored glass, premium symbols as golden figurines (a panda, a rabbit, stacked coins) encased in gold-rimmed spheres. A row of ball capsules lines the top rail like a steampunk gachapon track. No buy bonus, no ante bet, no jackpot tier. The whole game runs on that single center-reel scatter and whatever the Secret Symbol chain does once it starts rolling.