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