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