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