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