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.
Defeated the Dragon.
Defeated the Wyrm.
Defeated an Yggdrasil Bud, Yggdrasil Sprout, and Yggdrasil Clover.
Let an adventurer rest.
Retired an adventurer.
Defeated the Drake.
Reached the Sixth Stratum.
Obtained more than 250,000 Ental.
Defeated the Etreant.
Reached the Fifth Stratum.
Dealt 1,000 damage with a single hit.
Unlocked the Hexer class.
Reached the Fourth Stratum.
Defeated a boss in a single turn.
Unlocked the Ronin class.
Completed the quest "The bandit's treasure".
Reached the Third Stratum.
Reached the Second Stratum.
Reached the First Stratum.