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