Here is the full list of all 49 The Legend of Heroes: Zero no Kiseki Kai achievements.
Played for over 100 hours.
Earned all achievements.
Cleared the game at Hard Level or above.
Cleared the game at Nightmare Level.
Opened every treasure chest in a single playthrough.
Forged a strong bond with Tio.
Completed the Monsterpedia.
Won 1000 battles.
Raised a party member's level to 50.
Defeated Regna Vriel.
Acquired over a million mira.
Defeated over 2000 enemies.
Collected all Quartz of all varieties.
Won 500 battles.
Canceled enemy arts and crafts 100 times.
Cleared the game with all your party members' levels below 40.
Completed the Finale.
Acquired the strongest weapon for any character.
Obtained Detective Rank 1st.
Completed all the Support Requests.
Forged a strong bond with Elie.
Forged a strong bond with Randy.
Obtained all recipes.
Collected all ”Dark Doctor Glenn” and ”Crossbell Times” volumes.
Made all varieties of Outstanding Dishes.
Made all varieties of Stunning Dishes.
Completed Chapter 4.
Defeated Ogre Village.
Defeated Bijou.
Defeated Dark Legend.
Used 100 S-Breaks in battle.
Completed Chapter 3.
Invited Elie to attend the Schwartz Auktion.
Invited Tio to attend the Schwartz Auktion.
Invited Randy to attend the Schwartz Auktion.
Performed a Tactical Bonus with a rate over 3.00.
Collected all furniture and Enigma Covers.
Caught all varieties of fish.
Initiated 100 advantage encounters.
Completed Chapter 2.
Recovered a party member's HP during a pinch in battle.
Completed Chapter 1.
Won 100 battles.
Defeated 8 enemies at once.
Won 3 consecutive Chain Battles.
Cleared a chapter without being KO'ed once.
Cleared a chapter without retreating once.
Completed the Prologue.
Received the Police Handbook.