Here is the full list of all 13 Brume achievements.
Beat the game while not being corrupted.
Beat the game while being corrupted.
Kill the king with the big spoon.
Completed the stick only run.
Completed the permadeath run.
Completed the dark run.
Don't pick up new weapons.
Collect all the special flowers.
Obtained the shadow blade
Become corrupted.
Reach 10th level in sword weapons.
Reach 10th level in blunt weapons.
Reach 10th level in the wooden stick.