Here is the full list of all 33 Chicory: A Colorful Tale achievements.
Collect all decor
Pick up all litter
Discover all Brush Styles
Collect all clothing items
Fill in Gelato's photo gallery
Solve all of Oats' outfit riddles
Delivered all of Artichoke's mail
Deliver mail for Artichoke
Find all lost kids
Collect 50% of decor
Reveal 100% of the map
Complete all art classes
Pick up 50% of litter
Destroyed the Brush.
Grew a brush
Planted the Brushflowers
Collect 50% of clothing items
Collect 25% of decor
Solve the mystery of stolen furniture
Sang with Chicory
Discover 50% of Brush Styles
Shook Chicory's hand
Painted your wielder self-portrait
Pick up 25% of litter
Started the Wielder Trials
Met Queen Drosera
Reveal 50% of the map
Collect 25% of clothing items
Chicory painted you
Had a conversation with Chicory on the phone!
Met Chicory!
Return Beans' kids to her
Pick up Chicory's brush