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