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