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