Here is the full list of all 21 Corbid! A Colorful Adventure achievements.
Finish the first level.
Get Poppi, your partner in adventure.
Complete the Baroque garden.
Get the ability to mix colour.
Complete the Mesopotamian garden.
Face Dinoco and defeat him.
Face Atapoo and defeat him.
Finish all levels of the game by defeating the final bosses
Collect all the prisms
Complete the Baroque garden with all the prisms
Complete the Mesopotamian garden with all the prisms
Find a diary page
Find 5 diary pages.
Find all diary pages
Help a Camknat to fix his recognition system
Help 5 Camknats to fix their recognition system
Help all Camknats to fix their recognition system
Buy a stamp
Buy 5 stamps
Buy all stamps
Find the Ancient Champion