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