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