Here is the full list of all 28 Echoes of the Fey: The Fox's Trail achievements.
See all optional scenes with Kazamir
Conspire with the Imperial presence in Vodotsk to protect a secret
Uncover a new layer to the case
Tell your client the truth you have discovered
Uncover Folren's fate by piecing together the clues yourself
Find out what happened to Folren from Eduard
Complete all optional side scenes with Eduard
Complete all optional side scenes with Arkady
Complete all optional side scenes with Heremon
Forgive a friend for a betrayal of trust
Take a risk with an unknown potion
Give Luka the correct answers during your interview
Forge your name in the appointment book of the low mage
Anger Tiatha and impress Heremon by avoiding a troubling case.
Complete the third day of your investigation and close the case.
Manage to keep the secret you discovered entirely under wraps
Talk the fire mage down at the Krovakyn Church
Get close to Viola right before a crisis
Purchase and use an optional costume change for Sofya
Lie to your client rather than betray another's trust
Complete the second day of your investigation.
Complete all optional side scenes with Luka
Ask all optional character questions.
Complete the first day of your investigation.
Spy on someone during an optional scene as a cat
Listen to one of Simion's Leshin fables
Purchase and read one of the books from the bookstore
Ask a full set of questions during an interview