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