Here is the full list of all 13 Subsurface Circular achievements. It takes around 2-3 hours to unlock all of the achievements on Windows.
Listen to a story about jumping.
Learn a little about the making of Subsurface Circular.
Protect your world.
Create a new world.
Complete the sixth sequence.
Complete the fifth sequence.
Complete the fourth sequence.
Help a Tek find a new job.
Do not throw away your shot.
Complete the third sequence.
Offend your elder.
Complete the second sequence.
Complete the first sequence.