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 DLC, you are only able to access The Bridge and the Engineering Core (all other areas are inaccessible). Therefore, in order to get this Achievement, the player will need to collect all the recordings while playing through the DLC's storyline.