http://gameoftheart.com/forum/viewtopic.php?p=4914
Most people who follow Fallout know about the canceled version of Fallout 3 codenamed Van Buren, few know about the *other* canceled project, Brotherhood of Steel 2.
It seems Interplay knew the first BoS game wasn't very good. They were using it as a platform to pay for the development costs of the engine and to fund the second game. They went out of business before they were able to execute this plan.
Several years ago, I was given a copy of the design document for this game, the bible on which the game would be based. Now I'm going to share it with the community.
http://gameoftheart.com/downloads/Fallout_BoS2_Design.pdf
It was actually written by Brian Freyermuth, one of the FO1 designers (who was only a level designer on the first FOBOS) and incorporates some stuff from Van Buren.