Here is the full list of all 19 >observer_ achievements. It takes around 12-15 hours to unlock all of the achievements on Windows.
Reject Adam.
Finish the game without dying.
Find all nanophage patient cards in a single playthrough.
Complete all With Fire And Sword: Spiders arcade games
Find all RC cars and recall a memory of Adam.
Embrace Adam.
Find and listen to all patient interview recordings.
Survive Adam’s trapware.
Earn 3000 points during a single trapware run.
Find all roses and discover the final resting place.
Decide the fate of the merging minds.
Decide the fate of the organ farm.
Analyze 100 objects.
Interrogate 20 tenants.
Decrypt Adam’s figurine.
Interrogate Amir’s clients.
Find 10 nanophage patient cards.
Complete your first Dream Eater sequence.
Overdose on synchronization pills.