Disappointingly, the recent Fallout 4 teaser website was proven to be a hoax, but it seems that while that was fake, Fallout 4 is very real according to leaked documents acquired by Kotaku.
Kotaku received multiple documents that were said to be from a casting call for something known as Institute. Kotaku says that these confirmed to be real casting sheets and not just fake mockups. These documents give scripts, descriptions of characters, as well as other details that fit into the Fallout universe. The actual word “Fallout” doesn’t exist in the script, but there are many references to locations in the game.
One of the biggest pieces of news from the documents is the location that the game will be set, Boston. Beyond the references, another key clue is that the casting director for this casting call also worked on Skyrim and Dishonored, both Bethesda projects. You can see two pages of the casting sheets in the gallery below.