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.
Throw something as far as you can.
From victim to victor.
Break lots of jars.
Lit many lights.
Leave your comfort zone.
Don't smash the eggs.
Try to wake up the lost Sentinel.
Collect all the toys.
Collect all the outfits.
Complete the lost lullaby.
Peek through all the keyholes.
Reassemble all the emblems.
Reunite with the white shade.
Respect the past.
Break the five strange statues.
Bring light to the labyrinth of darkness.
Reunite the family.
The higher, the funnier!
Complete the labyrinth without making a sound.
Find the shark.
Use only one bubble in the underwater cave.
Find a nice resting place.
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.