Here is the full list of all 48 Voice of Cards: The Isle Dragon Roars achievements.
Viewed all endings.
Defeated the Dragon's lingering hatred in the Vexing Cave.
Witnessed the game master fall asleep.
Collected all item cards.
Won the battle against the island hermit.
Obtained Ridis's strongest weapon.
Won the battle against the mysterious knight.
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.
Obtained Mysterious Card 9.
Won a round on Include All at the game parlor.
Obtained the protagonist's strongest weapon.
Completed Chapter 6.
Collected all skill cards.
Obtained Mysterious Card 8.
Won a round on Add Skills at the game parlor.
Completed Chapter 5.
Obtained Mysterious Card 7.
Completed Chapter 4.
Obtained Mysterious Card 6.
Completed Chapter 3.
Saved up the maximum amount of gems.
Obtained Mysterious Card 4.
Obtained Mysterious Card 5.
Won a round on Add Events at the game parlor.
Struck foes with elements they are weak to thrice in a single battle.
Completed Chapter 2.
Obtained Mysterious Card 3.
Completed Chapter 1.
Successfully fled a battle.
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.
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.
Learned a new skill from a suspicious doctor.