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