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