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