Alien Archivist

 is a Fallout 3 achievement in the Mothership Zeta add-on.

It is granted for collecting all 25 Alien Captive recorded logs.

Upon completion of the add-on, you are only able to access The Bridge, the Engineering Core, the Steamworks, and the Holding Cells (all other areas are inaccessible). It is also possible that the Holding Cells will not be available (possibly after finishing The Pitt). Therefore, in order to get this Achievement, the player will need to collect all the recordings while playing through the add-on's storyline.