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.
Accept things as they are.
Hit your lowest point.
Collect all the outfits.
Collect all the toys.
Peek through all the keyholes.
Reassemble all the emblems.
Witness the resting place of the once mighty.
Be faster than the Sentinels.
Pay it forward.
Complete the lost lullaby.
Try to undo a mistake.
Break the five strange statues.
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.
From victim to victor.
The other way was safer.
Break lots of jars.
Lit many lights.
Leave your comfort zone.
Complete the labyrinth without making a sound.
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.
Reunite the family.
The higher, the funnier!