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