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