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
Second stage
First stage
Sing to the magic fowls
Find all mementos
Fourth stage
Avoid eel bites
Third stage
Feed the forest friend
Avoid the storm
Fifth stage
Finish the game
A color has been brought back
Break the stone piles