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