Ancient Stones Slot by BigPot Gaming

Five scatters to trigger the bonus. Not three. On a 15-position grid, that means a third of all visible symbols need to be scatters before anything happens. It's an unusual threshold that keeps the base game dry, and the payoff is a retriggerable free spins round with a progressive multiplier that climbs by 1x after every spin. Land 5 scatters, you get 10 spins starting at x1. The multiplier ticks up to x2 on the second spin, x3 on the third, and so on - so the early rounds are essentially warm-up. Land all 15 positions as scatters (theoretically) and you'd start with 30 spins, pushing that multiplier to x30 by the final spin.

More scatters means more spins on a clean 2-per-scatter scale: 6 scatters give 12, 7 give 14, all the way up to that 30-spin ceiling. Retriggering inside free spins follows the same rules and the multiplier keeps climbing from wherever it left off, not resetting. A Mesoamerican stone temple fills the background - heavy sandstone blocks with carved borders, a strip of blue sky and green jungle canopy peeking through at the top. The five high-value symbols are tribal masks, each in a distinct metal finish: red-gold with a crown, blue with dangling jewel earrings, matte silver, tarnished bronze, and an ornate golden face with wide horns. Card royals (A, K, Q, J) are etched into darker stone tiles and blend almost flat against the grid.

Buy Free Spins is available through a button pinned to the left edge of the screen. Only 10 paylines, left to right, with a Wild that substitutes for everything. The entire game leans on that escalating multiplier inside the bonus - base game wins are straightforward line pays with nothing unusual going on. Where it gets interesting is late in a long free spins run. By spin 20 every line hit is multiplied by x20, which is where the 1,500x cap starts to feel reachable despite the modest payline count.