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