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