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