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