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