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