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