Not really an achievement, per se, more RNJesus smiling down upon me.
I was doing a dungeon in this game called "the darkest dungeon" In which, your heroes can get stressed, and if they get stressed too much, they will either turn into a bad*ss, or pretty much break, adopting a variety of behaviors until the end of the dungeon, from paranoid, to hopeless, to fearful.
If you can guess, the positive traits ALMOST NEVER happen.
Anyways, I SOMEHOW managed to do a boss fight. EVERYONE got too stressed, and EVERYONE became virtuous... and I beat the dungeon, getting a MASSIVE pile of loot.