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