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