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