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