Created by Dr. Stanislaus Braun, the Tranquility Lane simulation stands in stark contrast to the rest of Fallout 3 because it is a depiction of what life was like before nukes reduced the country to the state it is in. That all sounds rather lovely, until you realise that Dr. Braun is completely insane and has been keeping the residents of Vault 112 locked in the simulation for about two centuries just so that he can torture them. When the Lone Wanderer arrives while searching for his father James, Braun takes the opportunity to manipulate him into harassing, torturing and even killing the residents of this seemingly idyllic vision of 1950s suburbia so that he can free James from the machine. Or you can just trigger the fail-safe and have the Chinese Army come in and kill everyone for real, finally releasing them from this odd form of purgatory. In a game that does well at conditioning the player to accept the Capital Wasteland for what it is, Tranquility Lane is particularly jarring both for how 'normal' it appears and for how crazy Dr Braun is.