Here is the full list of all 48 Voice of Cards: The Isle Dragon Roars achievements.
Obtained Mysterious Card 3.
Completed Chapter 1.
Won a round on Add Events at the game parlor.
Obtained Mysterious Card 2.
Played at a game parlor for the first time.
Won a round on Simple at the game parlor.
Struck foes with elements they are weak to thrice in a single battle.
Obtained Mysterious Card 1.
Defeated all enemies without taking any damage.
Unlocked all achievements.
Viewed all endings.
Completed your collection.
Collected all item cards.
Collected all equipment cards.
Collected all key item cards.
Collected all character cards.
Collected all skill cards.
Collected all enemy cards.
Completed Chapter 2.
Completed Chapter 3.
Completed Chapter 4.
Completed Chapter 5.
Completed Chapter 6.
Completed Chapter 7.
Obtained Mysterious Card 4.
Obtained Mysterious Card 5.
Obtained Mysterious Card 6.
Obtained Mysterious Card 7.
Obtained Mysterious Card 8.
Obtained Mysterious Card 9.
Obtained Mysterious Card 10.
Obtained more than 50,000G.
Obtained the protagonist's strongest weapon.
Obtained Mar's strongest weapon.
Obtained Melanie's strongest weapon.
Obtained Ridis's strongest weapon.
Obtained Bruno's strongest weapon.
Reached MAX LV with one character.
Began a game using saved data carried over.
Defeated the Dragon's lingering hatred in the Vexing Cave.
Saved up the maximum amount of gems.
Successfully fled a battle.
Witnessed the game master fall asleep.
Learned a new skill from a suspicious doctor.
Won the battle against the mysterious knight.
Won the battle against the island hermit.
Won a round on Add Skills at the game parlor.
Won a round on Include All at the game parlor.