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