Alien Archivist

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

It is granted for collecting all 25 Alien Captive Recordings.

In order to get this Achievement, will need to collect all the recordings while playing through the DLC's storyline, upon completion of the DLC you are only able to access The Bridge and the Engineering Core. All other areas are inaccessible.