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