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