Here is the full list of all 35 The Wolf Among Us achievements. It takes around 8-10 hours to unlock all of the achievements on Windows.
Completed Chapter 1 of Episode 2.
Completed Episode 1: "Faith"
Completed Chapter 5 of Episode 1.
Completed Chapter 4 of Episode 1.
Completed Chapter 3 of Episode 1.
Completed Chapter 2 of Episode 1.
Completed Chapter 1 of Episode 1.
Unlocked all Book of Fables entries in Episode 1.
Completed Chapter 2 of Episode 2.
Completed Chapter 3 of Episode 2.
Completed Chapter 4 of Episode 2.
Completed Chapter 5 of Episode 2.
Completed Episode 2: "Smoke and Mirrors"
Unlocked all Book of Fables entries in Episode 2.
Completed Chapter 1 of Episode 3.
Completed Chapter 2 of Episode 3.
Completed Chapter 3 of Episode 3.
Completed Chapter 4 of Episode 3.
Completed Chapter 5 of Episode 3.
Completed Episode 3: "A Crooked Mile"
Unlocked all Book of Fables entries in Episode 3.
Completed Chapter 1 of Episode 4.
Completed Chapter 2 of Episode 4.
Completed Chapter 3 of Episode 4.
Completed Chapter 4 of Episode 4.
Completed Chapter 5 of Episode 4.
Completed Episode 4: "In Sheep's Clothing"
Unlocked all Book of Fables entries in Episode 4.
Completed Chapter 1 of Episode 5.
Completed Chapter 2 of Episode 5.
Completed Chapter 3 of Episode 5.
Completed Chapter 4 of Episode 5.
Completed Chapter 5 of Episode 5.
Completed Episode 5: "Cry Wolf"
Unlocked all Book of Fables entries in Episode 5.