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