[the sun fan]

FCed Free Bird on Expert in Guitar Hero 2 (my score is horrible though because I didn't know the path).
Had a few first place scores in rock band across different instruments. Some were tied and some were untied.

Quest Cape in Runescape at 85 combat back when 85 combat was the lowest possible level (aka centuries ago)
Maxed an ironman in Old School Runescape, quest cape and achievement cape but no inferno cape like rushy has unfortunately.

More of an irl thing, but I lost 60 pounds largely to learning DDR (put it all back on since though : * ) )

Can consistently beat Civ 5 and Civ 6 on Diety.

Rented F-Zero GX as a child and beat it before we had to return the game. Did not learn about the game's reputation as very difficult until much later in life.

If werewolf counts (I'd argue it doesn't) then I'd have to write an essay, but in short, I think I was at the bottom of the rabbit hole, digging it deeper for others to follow if they wished.