Here is the full list of all 48 Voice of Cards: The Isle Dragon Roars achievements.
Viewed all endings.
Saved up the maximum amount of gems.
Won the battle against the mysterious knight.
Defeated the Dragon's lingering hatred in the Vexing Cave.
Completed Chapter 7.
Collected all key item cards.
Reached MAX LV with one character.
Obtained Melanie's strongest weapon.
Obtained Mysterious Card 10.
Obtained Mar's strongest weapon.
Obtained Bruno's strongest weapon.
Won the battle against the island hermit.
Obtained Ridis's strongest weapon.
Obtained the protagonist's strongest weapon.
Collected all skill cards.
Completed Chapter 6.
Obtained Mysterious Card 9.
Obtained Mysterious Card 7.
Obtained Mysterious Card 8.
Completed Chapter 5.
Completed Chapter 4.
Obtained Mysterious Card 6.
Completed Chapter 3.
Obtained Mysterious Card 5.
Won a round on Include All at the game parlor.
Won a round on Add Events at the game parlor.
Completed Chapter 2.
Obtained Mysterious Card 4.
Won a round on Add Skills at the game parlor.
Obtained Mysterious Card 3.
Completed Chapter 1.
Successfully fled a battle.
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.
Completed your collection.
Collected all item cards.
Collected all equipment cards.
Collected all character cards.
Collected all enemy cards.
Obtained more than 50,000G.
Began a game using saved data carried over.
Witnessed the game master fall asleep.
Learned a new skill from a suspicious doctor.