Here is the full list of all 40 Life is Strange: True Colors achievements. It takes around 15-20 hours to unlock all of the achievements on Windows.
Help the Hoodie Guy find his dog
Find and play the Student's lost song
Help the Birdwatcher find her bird
Find the “Bomber Jacket” Memory in Chapter 5
Find all Memory Collectibles in Chapter 5
Find all Memory Collectibles in Life is Strange: True Colors™
Find the “CIT Sticker” Memory in Chapter 4
Find all Memory Collectibles in Chapter 4
Find the “Polaroid” Memory in Chapter 4
Find the “Microphone” Memory in Chapter 4
Find the “Bomber Jacket” Memory in Chapter 3
Find all Memory Collectibles in Chapter 3
Find the “Phone” Memory in Chapter 1
Find all Memory Collectibles in Chapter 1
Find the “Helmet” Memory in Chapter 1
Complete Chapter 5 of Life is Strange: True Colors™
Find the “Pendant” Memory in Chapter 5
Find the “Guitar Strings” Memory in Chapter 5
Find the “Business Card” Memory in Chapter 5
Find the “Mom's Keys” Memory in Chapter 5
Complete Chapter 4 of Life is Strange: True Colors™
Help the Jelly Bean Counter win the contest
Find the “Drum Kit” Memory in Chapter 4
Find the “Pressed Rose” Memory in Chapter 4
Complete Chapter 3 of Life is Strange: True Colors™
Find the “Valkyrie's Dish” Memory in Chapter 3
Find the “Old Paper” Memory in Chapter 3
Find the “Appointment Slip” Memory in Chapter 3
Find the “Dollar” Memory in Chapter 3
Complete Chapter 2 of Life is Strange: True Colors™
Find all Memory Collectibles in Chapter 2
Find the “T-Shirt” Memory in Chapter 2
Find the “Gummies” Memory in Chapter 2
Find the “Umbrella” Memory in Chapter 2
Find the “Rent Check” Memory in Chapter 2
Find the “Button” Memory in Chapter 2
Complete Chapter 1 of Life is Strange: True Colors™
Find the “Business Card” Memory in Chapter 1
Find the “Crack” Memory in Chapter 1
Find the “Riley Letter” Memory in Chapter 1