Here is the full list of all 13 Subterraneus achievements.
Chapter 7 completed!
A collection MUST be complete.
Chapter 6 completed!
Chapter 5 completed!
Chapter 4 completed!
Chapter 3 completed!
Mistakes are for the others.
Chapter 2 completed!
They keep disappearing!
Chapter 1 completed!
Like a needle in a hay bay
Too many mushrooms! And yet, not enough...
Introduction completed!