Here is the full list of all 29 Legend of Mana achievements.
Learned every Ability.
Reached level 50.
Reached level 99.
Witnessed the ending for the first time.
Saw the game's ending after completing 67 events.
Read every entry in Li'l Cactus's diary.
Witnessed the conclusion of events involving the jewel thief.
Witnessed the conclusion of events involving Bud and Lisa.
Witnessed the conclusion of events involving Niccolo.
Held over 100,000 lucre at one time.
Witnessed the conclusion of events involving the Emperor of Dragons.
Witnessed the conclusion of events involving the Faerie world.
Reached level 30.
Made an instrument for the first time.
Caught an Elemental Spirit for the first time.
Held over 10,000 lucre at one time.
Created a golem for the first time.
Reached level 10.
Made a piece of armor for the first time.
Made a weapon for the first time.
Raised an item of produce in an orchard for the first time.
Hatched a pet from a monster egg for the first time.
Read the first entry in Li'l Cactus's diary.
Placed the "Mailbox" artifact on the world map.
Learned every Special Technique.
Raised every type of produce.
Stepped on 32 or more crabs in the crab bashing mini game.
Played the game on "No Future" mode.
Completed every entry in the encyclopedia.