Here is the full list of all 17 GRIS achievements. It takes around 6-8 hours to unlock all of the achievements on Windows.
Sing to the magic fowls
Break the stone piles
Memories from the past
Find all mementos
Third stage
Second stage
Avoid the storm
First stage
Fifth stage
Finish the game
Avoid eel bites
A color has been brought back
Fourth stage
Feed the forest friend