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