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