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