Here is the full list of all 11 bit Dungeon III achievements.
Free Sophia's Soul.
Unlock the Shade race.
Assisted all neutral monsters.
All Archons have been defeated.
Hunt down 25 elite monsters.
High equipment rarity total has been reached.
Kill 100 Fiends
Gain 50 souls from defeating bosses.
Kill 50 players and take their souls.
Equip all rune slots with rarity 3 and above.
Defeat the Monad in the Darkworld