Complete the indicated task to unlock the achievement.

Achievement	How to unlock
Empty Nest Syndrome	Defeat The Matron in Classic or Lunatic Mode.
Great Uncle Midas	Pick up 500K gold from slain enemies.
Indisputable Champion	Reach Grandmaster rank in Matchmaking.
Mark of Infinite Dedication	Reach Level 300 with any character.
Nooks and Grannies	Explore 500 obscure background events.
Steel-Toed Potato	Defeat 500 opponents in Arena or Matchmaking.