Tranquility Lane (quest)

Tranquility Lane is a main quest in Fallout 3 as well as an achievement/trophy.

Synopsis
The Lone Wanderer found their father, but now they must find a way out of the Tranquility Lane simulation.

Walkthrough

 * 1) (Option) Complete all of Betty's tasks
 * 2) Make Timmy Neusbaum cry. This can be achieved by: punching him three times; using a Speech check to convince him that his parents are getting divorced and it is all his fault; presenting him with the military school brochure (found on the kitchen table of the Nuesbaum house) and telling him he's being sent away; or murdering one of his parents.
 * 3) Break up the Rockwell's marriage. This can be achieved by passing a Speech check to convince Janet that Roger is cheating on her; placing the lacy underwear from the Simpson household bedroom on the Rockwell basement desk and inform Janet that Roger is either cheating on her or that he's a crossdresser; or read Janet's diary in the Rockwell bedroom discover her rivalry with Martha Simpson and kill Martha with the rolling pin in the Rockwell kitchen, bringing her death up to Roger or Janet afterwards.
 * 4) Kill Ms. Henderson, but in a creative way. In the Henderson house, one may rig the chandelier to fall when someone walks under it; slide a roller skate from the door frame to the top of the stairs; tamper with her oven's pilot light and ask her to bake a pie; or access the security terminal in her kitchen and enable a security lockdown to trap Mabel in her home, and then begin her Mr. Handy's security program after disabling the security parameters data.
 * 5) Kill everyone on Tranquility Lane after obtaining the Pint-Sized Slasher mask and Slasher knife from the doghouse
 * 6) (Option) Trigger the simulation's failsafe.
 * 7) In the abandoned house, one can activate several objects to emit tones in an order which cause the failsafe to appear. This order is: radio (F), pitcher (C), gnome (D), pitcher (C), cinder block (B), gnome (D), bottle (A). Select the "Chinese Invasion" option on the failsafe terminal to put all of the residents out of their misery.
 * 8) Exits the simulation and reunite with Dad.

Behind the scenes

 * Game Informer rated Tranquility Lane as being among the ten most memorable moments in 2008 games.
 * Early in development, the Lone Wanderer would instead place a frag mine in the oven, however the copy of the pristine frag mine mesh that it uses is deleted.

Bugs

 * Your follower may not return to their original location upon entering the simulation, and instead disappear. Sometimes they can be found in the pod area later on.
 * Mrs. Rockwell can skip the argument with her husband if you decide to use the lacy underwear. She will just run away when she's within speaking distance of her former husband. One way to avoid this is to exit the basement before she does and make sure Mr. Rockwell is not too close to the basement door.
 * When you check your watch in Tranquility Lane, the game may freeze.
 * If you start the Chinese invasion while trying to break up the Rockwells' marriage, they will survive because they can't die during that part of the quest.
 * If Mabel Henderson is not in her house, or leaves during the time you are arranging her creative death, she may not return. You may need to disable the security lockdown and find her, you may kill her and Betty will restore her to her house, otherwise you may have to load another save.
 * If you become hostile with one of the residents and get a fair distance away from him/her you will hear your character say "I guess it was nothing" in young Amata's voice.
 * If you save your game within the simulation then try loading it, the screenshot in the load options will show Tranquility lane in color.