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