Well it was made by Interplay, and it dose have the word fallout in it, so it is a fallout game or are you to stupid to realize that? Oh and PS the Brotherhood of Steel are in every fallout game, you are a smart one aren't you, your mom must be proud.
Wow. We're down to mother Jokes and insulting my inteligence, that was a huge jump down. I'll refrain from flaming back, as I've read the forum rules.
If you read the article I allude to, you'll see why F:BOS is not a fallout game. You can put lipstick on a pig, but its still a pig.
Edit: This is one of the most conclusive statements made on F:BOS, its in the article I linked This is from no less than a F:BOS Developer, quoted from the offical dev forum:
However. As we have stated more than a few times now, FO:BOS is not a continuation of the PC chronology. It is inspired by, and takes place with a recognisable tangent of the Fallout Universe, but is is a law unto itself. Further console games (should they come to fruition) will have to follow what we lay down with this game.
Is there an answer that will apease your "Why the hell change it..."? Probably not, because when you get right down to it, we changed it because we wanted to.
FO:BOS resides within a thrice-removed tangent from ourselves, with Fallout 1 and 2 nestled somewhere between.
Yes facts about FO and the BOS that we could use in our defense have been listed, but since we are going to stay the course that F:BoS is not meant to be canon or not necassarily follow canon, then we can't site those items. Can we?
My Emphasis
Interplay exiled the game from Canon before they even released it.