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