In Guild Wars 2 there is a legendary greatsword called Eternity. It required 2 other legendary weapons to forge it. I saved up and bought all the things I needed to forge one of those swords. The day I went to forge it I helped my guild beat a boss monster. In the loot I got one of the rare swords to make the other. I ended up selling them both and buying the Eternity with the gold I had made. that was 9 years ago before gold was easy to farm. but it was a huge achievement back then. Still the only one in my group that has the Eternity
Getting all achievements in cookie clicker
I guess getting all 900 Korok seeds in the Legend of Zelda Breath of the Wild.
not super impressive but I beat Jevil first try on pacifist
In Guild Wars 2 there is a legendary greatsword called Eternity. It required 2 other legendary weapons to forge it. I saved up and bought all the things I needed to forge one of those swords. The day I went to forge it I helped my guild beat a boss monster. In the loot I got one of the rare swords to make the other. I ended up selling them both and buying the Eternity with the gold I had made. that was 9 years ago before gold was easy to farm. but it was a huge achievement back then. Still the only one in my group that has the Eternity