Here is the full list of all 51 Crystal Project achievements.
Beat the game.
Teleport to an unknown world.
Master the Summoner class.
Acquire every Summon.
Breed a Golden Quintar.
Master the Beastmaster class.
Master the Mimic class.
Discover every Crystal.
Have a party member reach max level.
Change a party member's name.
Master the Weaver class.
Acquire a Summon.
Master the Samurai class.
Master the Nomad class.
Obtain a Salmon companion.
Master the Assassin class.
Master the Valkyrie class.
Master the Shaman class.
Obtain an Owl companion.
Master the Beatsmith class.
Master the Dervish class.
Discover 12 Crystals.
Learn a Monster Magic spell.
Master the Cleric class.
Master the Ninja class.
Master the Chemist class.
Obtain an Ibek companion.
Master the Reaper class.
Master the Aegis class.
Master the Hunter class.
Teleport to a far away land.
Obtain a Quintar companion.
Master the Wizard class.
Discover 7 Crystals.
Master the Fencer class.
Open 100 treasure chests.
Conquer the trials.
Defeat 5 boss flames.
Master the Warlock class.
Master the Monk class.
Master the Warrior class.
Discover 3 Crystals.
Master the Rogue class.
Open 50 treasure chests.
Defeat a boss flame.
Defeat 25 boss flames.
Learn every Monster Magic spell.
Change a party member's gender.
Open 500 treasure chests.
Beat the game's secret last boss.
Master the Scholar class.