Here is the full list of all 16 Countess in Crimson achievements.
Unlock Ashley's Mastery Scene.
Exhaust 10 optional dialogue topics in a single playthrough.
Unlock Irina's Mastery Scene.
Make a wish at the well or fountain.
Take photos of 8 different girls.
Unlock Aliyah's Mastery Scene.
Finish a single playthrough.
Discover drunkard's true identity.
Unlock Eva's Mastery Scene.
Discover what happened to the girl from the torn photo.
Unlock Countess' Mastery Scene.
Discover all four main endings.
Unlock two Mastery Scenes with different Personality Traits in a single playthrough.
Unlock two Mastery Scenes with the same Personality Trait in a single playthrough.
Rescue Irina in Truthseeker ending.
Unlock Magdalena’s Mastery Scene.