According to ESRB, this game contains: Blood and Gore, Mature Sexual Themes, Strong Langauge, Violence
Parents will want to keep the kids away from Fallout: Brotherhood of Steel. The game sports a well-earned Mature rating and features enough F-bombs to please even the most jaded gangsta rap aficionado. Add in Ruby the prostitute, her heaving chest, and the double entendres (not to mention the fact that players can pay her for her "services") and this is one of those games that isn't for the little ones.
Fallout fans have been vocal in their displeasure with Brotherhood of Steel, so hardcore fans of the series will want to steer clear of this title. It may be called Fallout, but the similarities between this title and the earlier PC incarnations are few and far between.
Hack and slash fans may get some enjoyment out of Brotherhood of Steel, but would probably be better served by picking up Baldur's Gate: Dark Alliance II or Champions of Norrath instead. Both of those titles, while well short of perfect, are more enjoyable than Fallout.
Deaf and Hard of Hearing gamers can pick up Fallout without worry-the game features full subtitling.