Here is the full list of all 31 RiME achievements. It takes around 12-15 hours to unlock all of the achievements on Windows.
Reunite with the white shade.
Collect all the toys.
Break the five strange statues.
Lit many lights.
Collect all the outfits.
Bring light to the labyrinth of darkness.
Find a nice resting place.
Don't smash the eggs.
Peek through all the keyholes.
Complete the lost lullaby.
Throw something as far as you can.
Reunite the family.
The higher, the funnier!
Use only one bubble in the underwater cave.
Move undetected amongst the shades.
Accept things as they are.
Hit your lowest point.
Reassemble all the emblems.
Witness the resting place of the once mighty.
Be faster than the Sentinels.
Pay it forward.
Try to undo a mistake.
Respect the past.
Find the shark.
Turning your back to the truth and persevering will lead you nowhere.
From victim to victor.
The other way was safer.
Break lots of jars.
Leave your comfort zone.
Complete the labyrinth without making a sound.
Try to wake up the lost Sentinel.