Gonzo's Quest Slot by NetEnt

Carved stone blocks drop into the grid instead of spinning. When a combination lands, those blocks shatter and new ones fall from above to fill the gaps - what NetEnt labeled the Avalanche mechanic back in 2010, before tumbling reels became an industry standard. Each consecutive Avalanche within one spin bumps a multiplier trail: 1x on the first win, then 2x, 3x, and 5x if you chain four cascades. Miss a win and it resets. Simple system, but it turns every payline hit into a question of whether the next collapse keeps the chain alive.

Free Falls run the same idea at triple scale. Three golden scatter symbols across reels 1, 2, and 3 award 10 free spins where the multiplier trail jumps to 3x, 6x, 9x, and 15x. Five blue mask symbols across a payline at that 15x ceiling pays 1,875x from a single line, and overlapping payline wins in the same cascade push toward the 2,500x cap. The Wild - a stone question mark appearing only on reels 2, 3, and 4 - substitutes for everything including scatters, which matters because landing 3 more scatters during the bonus adds another 10 Free Falls with no retrigger limit.

Gonzo himself stands to the left of the grid against overgrown temple ruins and waterfalls, reacting to results in real time. He catches coins in his helmet on wins and moonwalks on big hits. No buy bonus, no gamble option, no jackpot - the entire game is the Avalanche multiplier trail and nothing else, which is part of why it spawned a full franchise. Return to El Dorado added 262,144 ways and a 15,825x ceiling, but most casino lobbies still list the original as the default Gonzo entry.