Gonzo's Quest replaces winning stone symbols through its Avalanche mechanic. New stones drop into the emptied positions, and successive wins in the sequence increase the multiplier; a non-winning result resets that progress. Free Fall scatters open a free-spin feature with a higher multiplier range than the main game. The falling blocks are therefore part of the result calculation, not just an animation after a conventional reel win. Keep this original format separate from Gonzo's Quest Megaways and live Gonzo game shows.
To compare related slots formats, read the rules of Dead or Alive 2 and Mega Joker.
The library also explains the difference between lines, ways and clusters to help put these mechanics in context.
Source: published game information.