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