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