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