Here is the full list of all 31 RiME achievements. It takes around 12-15 hours to unlock all of the achievements on Windows.
Leave your comfort zone.
Find a nice resting place.
Reunite the family.
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.
From victim to victor.
Pay it forward.
Hit your lowest point.
Accept things as they are.
Respect the past.
Break the five strange statues.
Break lots of jars.
Lit many lights.
Bring light to the labyrinth of darkness.
Try to wake up the lost Sentinel.
The higher, the funnier!
Throw something as far as you can.
Don't smash the eggs.
Complete the labyrinth without making a sound.
Find the shark.
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.