In cascade slots, winning symbols disappear after each payout and new ones fall from above. The chain continues while winning combinations exist, often with a growing multiplier.
Different names, one idea
Tumbling (Gonzo's Quest), avalanche (Bonanza, Megaways), cascade (Sugar Rush) — studios name the mechanic differently, but the principle is the same: reels do not spin again; symbols drop to refresh within one spin.
Multipliers and grids
Many cascade slots add a multiplier that grows with every step of the chain (DoubleMax doubles it per cascade). Cluster slots use cascades with symbol groups, and Megaways with a variable number of symbols per reel.
Pros and cons
Cascades make a spin dynamic: one good hit can produce a series of payouts in a row. On the other hand, volatility is usually high, and long dry streaks between series are common.