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