Here is the full list of all 29 Etrian Odyssey III HD achievements.
Reached the First Stratum.
Obtained all other achievements.
Reached the Second Stratum.
Reached the Third Stratum.
Reached the Fourth Stratum.
Reached the Fifth Stratum.
Reached the Sixth Stratum.
Der Boss des sechsten Stratums wurde auf Schwierigkeitsstufe Experte besiegt.
Encountered an enemy through mining ore, gathering plants, or chopping wood.
Pitched a tent.
Defeated the Deep Princess.
Defeated Olympia and the Abyssal King.
Defeated the Progenitor.
Defeated the Abyssal God.
Defeated all types of Pasaran, including Gold, Red, and Blue.
Retired an adventurer.
Let an adventurer rest.
Unlocked the Shogun class.
Unlocked the Yggdroid class.
Forged a weapon.
Obtained more than 250,000 Ental.
Dealt 10,000 damage with a single hit outside of oceanic quests.
Defeated a boss in a single turn.
Sunk a pirate ship with your cannon.
Went fishing.
Defeated the Anemone.
Defeated the Wyrm.
Defeated the Drake.
Defeated the Dragon.