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