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