Here is the full list of all 17 Dungeon Hearts achievements.
Finish the game in 40 minutes or less.
Use all four Hero's final Skill in the same battle.
Unlock 40 Enemies in the Bestiary.
Finish the game with at least one Level 1 Hero.
Defeat The Dark One.
Finish the game without any Hero getting knocked out.
Finish the game without using any Skills.
Defeat The Dark One on Hard difficulty.
Reach Level 60 with any Hero.
Reach battle 7.
Unlock 20 Enemies in the Bestiary.
Achieve an attack multiplier of x7 or more in a single attack.
Reach battle 15.
Reach Level 20 with any Hero.
Unlock 10 Enemies in the Bestiary.
Use all four Heroes in a single attack.
Complete the tutorial.