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