Full list of all 19 >observer_ achievements worth 1,000 gamerscore. It takes around 10-12 hours to unlock all of the achievements on Xbox One.
Rejected Adam.
Finished the game without dying.
Embraced Adam.
Found all nanophage patient cards.
Found and listened to all patient interview recordings.
Survived Adam's trapware.
Earned 3000 points during a single trapware run.
Completed all With Fire and Sword: Spiders arcade games
Found all roses and discovered the final resting place.
Decided the fate of the organ farm.
Decrypted Adam's figurine.
Found all RC cars and recalled a memory of Adam.
Analyzed 100 objects.
Attempted to interrogate 20 tenants.
Interrogated Amir's clients.
Completed your first Dream Eater sequence.
Decided the fate of the merging minds.
Found 10 nanophage patient cards.
Overdosed on synchronization pills.