Strictly Profitable

Strictly Profitable is a repeatable quest in Fallout 3.

Walkthrough
After receiving the Mesmetron from Grouse in Paradise Falls, the player has the option of enslaving other people in addition to the four VIPs required to complete the quest Strictly Business. More potential slaves are all over the Capital Wasteland. For every slave the player captures and sends to Paradise Falls, Grouse will pay out 250 caps and give a new slave collar to continue the "recruiting."

Grouse also sells mesmetron power cells at the steep price of 200 caps for 10 rounds in case you have used them all and require more. However, since he pays 250 caps for any new slave, the steep price is offset by enslaving another person.

Enslavable non-player characters
A list of known non-player characters that can be enslaved with the Mesmetron. This may not be all of them.

Bugs

 * Certain characters (namely Angela Staley or Bone from The Pitt) may cause the game to freeze if they are mesmerized and collared.