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