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