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