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