Here is the full list of all 22 Etrian Odyssey HD achievements.
Retired an adventurer.
Defeated the Yggdrasil Core.
Defeated an Yggdrasil Bud, Yggdrasil Sprout, and Yggdrasil Clover.
Defeated the Drake.
Defeated the Dragon.
Defeated the Wyrm.
Defeated a boss in a single turn.
Let an adventurer rest.
Obtained more than 250,000 Ental.
Reached the Sixth Stratum.
Unlocked the Hexer class.
Defeated the Etreant.
Completed the quest "The bandit's treasure".
Reached the Fifth Stratum.
Dealt 1,000 damage with a single hit.
Reached the Fourth Stratum.
Unlocked the Ronin class.
Reached the Third Stratum.
Reached the Second Stratum.
Reached the First Stratum.
Obtained all other achievements.
Defeated the boss of the Sixth Stratum on Expert difficulty.