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