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