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