You know, let's just break it down up top. Fallout 3 takes the base level action of The Elder Scrolls IV: Oblivion, changes the setting from knights-and-wizards fantasy to mutants-and-raiders post-apocalyptic Washington DC, sprinkles on a handful of systems and references that are designed to remind you of the previous Fallout games, and sends you on your way. It's successful at giving you meaningful moral choices that, in a lot of cases, reshape the game pretty dramatically. But at the same time, by trying to be a wide-open game that accounts for multiple play styles, you really notice it when you bump up against the technical and storytelling limitations of the game and its narrative structure.
more:http://www.giantbomb.com/fallout-3/61-20504/reviews/