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