Molten Vault

5 reels × 3 rows, 243 ways, left to right. Winning symbols melt away and new ones fall in. Wilds land on the three middle reels.

Each cascade in a spin climbs the ladder: 1× → 2× → 3× → 5×. In free spins the ladder never resets.

3, 4 or 5 scatters on the first drop of a spin award 10, 15 or 20 free spins. The feature can be bought for 22.5× the bet with 10 free spins, for 38.89× with 15, or for 55.81× with 20. Each price is what those spins return on average, less the house's share: no tier is a better buy than another.

When two scatters are in view, the reels still turning stop more slowly. That is decided only by the reels that have already stopped and happens every time two are in view, whether a third comes or not: it says nothing about what the turning reels will show.

One spin, feature included, pays at most 5,000× the bet.