The design document for the cancelled Fallout game "Brotherhood of Steel 2" has been released onto the net by... some guy. RPS has an article on it here.

Download the document in PDF here. (20MB) It's been scanned in pretty sloppily and on many of the pages the text is smudged out on the right corner and is nearly unreadable. The document contains such juicy nuggets as blurbs about stealthmodes and pictures of trucks at truckstops. It details specifics of the gameplay and lays out the entire plot that takes you on a magical journey from Lubbock, to Fort Worth, to San Antonio. Ah, what could have been.