Here is the full list of all 12 Ether One achievements.
Taken every Core Memory photograph.
Listened to all the Voicemail messages.
Restored all of the plaques.
Restored 20 Projectors.
Heard the complete tale of The Knocker.
Collected all the Memory Fragments.
Restored 15 Projectors.
Restored 10 Projectors.
Fill the shelves in The Case.
Rang the bell in the Institute upon your return.
Restored 5 Projectors.
Swapped the fuse in Restoration Chamber 3.