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