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