Full list of all 34 Life is Strange: Before the Storm achievements. It takes around 10-12 hours to unlock all of the achievements on Windows.
Complete the optional graffiti #1 in Episode 1: Awake
Complete the optional graffiti #2 in Episode 1: Awake
Complete the optional graffiti #3 in Episode 1: Awake
Complete the optional graffiti #4 in Episode 1: Awake
Complete the optional graffiti #5 in Episode 1: Awake
Complete the optional graffiti #6 in Episode 1: Awake
Complete the optional graffiti #7 in Episode 1: Awake
Complete the optional graffiti #8 in Episode 1: Awake
Complete the optional graffiti #9 in Episode 1: Awake
Complete the optional graffiti #10 in Episode 1: Awake
Complete Episode 1: Awake
Complete the optional graffiti #1 in Episode 2: Brave New World
Complete the optional graffiti #2 in Episode 2: Brave New World
Complete the optional graffiti #3 in Episode 2: Brave New World
Complete the optional graffiti #4 in Episode 2: Brave New World
Complete the optional graffiti #5 in Episode 2: Brave New World
Complete the optional graffiti #7 in Episode 2: Brave New World
Complete the optional graffiti #6 in Episode 2: Brave New World
Complete the optional graffiti #8 in Episode 2: Brave New World
Complete the optional graffiti #9 in Episode 2: Brave New World
Complete the optional graffiti #10 in Episode 2: Brave New World
Complete Episode 2: Brave New World
Complete the optional graffiti #1 in Episode 3: Hell Is Empty
Complete the optional graffiti #2 in Episode 3: Hell Is Empty
Complete the optional graffiti #3 in Episode 3: Hell Is Empty
Complete the optional graffiti #4 in Episode 3: Hell Is Empty
Complete the optional graffiti #5 in Episode 3: Hell Is Empty
Complete the optional graffiti #6 in Episode 3: Hell Is Empty
Complete the optional graffiti #7 in Episode 3: Hell Is Empty
Complete the optional graffiti #8 in Episode 3: Hell Is Empty
Complete the optional graffiti #9 in Episode 3: Hell Is Empty
Complete the optional graffiti #10 in Episode 3: Hell Is Empty
Complete Episode 3: Hell Is Empty
Complete Episode 1, Episode 2 and Episode 3 of Life is Strange: Before the Storm