Here is the full list of all 31 RiME achievements. It takes around 12-15 hours to unlock all of the achievements on Windows.
Accept things as they are.
Hit your lowest point.
Pay it forward.
Complete the lost lullaby.
Break the five strange statues.
Find the shark.
From victim to victor.
Break lots of jars.
Leave your comfort zone.
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.
Throw something as far as you can.
Collect all the toys.
Collect all the outfits.
Peek through all the keyholes.
Reassemble all the emblems.
Reunite with the white shade.
Respect the past.
Reunite the family.
The higher, the funnier!
Complete the labyrinth without making a sound.
Use only one bubble in the underwater cave.
Try to undo a mistake.
Move undetected amongst the shades.
Witness the resting place of the once mighty.
The other way was safer.
Turning your back to the truth and persevering will lead you nowhere.
Be faster than the Sentinels.