The Replicated Man

 is a Fallout 3 quest. It is also an Xbox 360 and PC achievement.

Objectives and walkthrough
The quest is given to you in Rivet City by Dr. Zimmer, who asks you to track down an android that has escaped. The android has gone sentient and independent and does not wish to return.

This quest can also be started in Big Town, by picking up a holodisk in Red's Clinic or in Megaton, by picking up a holodisk in Craterside Supply. The player can then talk to various people in Megaton (like the doc or the woman that sells weapons) to get more information about the android.

Solution 1: Talk to Pinkerton in Rivet City, the player will find out the android's name is Harkness, he is from the Commonwealth and has undergone facial reconstructive surgery and memory modification at the hands of Pinkerton. Harkness now works as the security officer in Rivet City. The player has the option to give Harkness his freedom as an android, leave him in his illusion that he's human or inform Dr. Zimmer.

Solution 2: Talk to Victoria Watts, often found in the Marketplace, in Rivet City, and she will give you a part from the android. If you hand this part in to Dr. Zimmer and tell him the android is dead you will complete the quest.