|The following is based on Van Buren and has not been confirmed by canon sources.|
The Boulder design document for the Van Buren project (Black Isle's canceled Fallout 3) was leaked from a secret source on September 9, 2005 at No Mutants Allowed. The author of this document is not known; the last person to modify the file was Sean K. Reynolds. It is a complete description of all places, characters and quests in the location "Boulder".
The original document has been split into 5 parts for reading at the wiki.