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