Here is the full list of all 31 RiME achievements. It takes around 12-15 hours to unlock all of the achievements on Windows.
Use only one bubble in the underwater cave.
Collect all the toys.
The higher, the funnier!
Reunite the family.
Move undetected amongst the shades.
Reunite with the white shade.
Accept things as they are.
Hit your lowest point.
Collect all the outfits.
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.
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.
Leave your comfort zone.
Lit many lights.
Bring light to the labyrinth of darkness.
Complete the labyrinth without making a sound.
Find a nice resting place.
Don't smash the eggs.
Try to wake up the lost Sentinel.
Throw something as far as you can.