Fallout 3 begins with your character's literal birth and ends with...well, that's up to you. It might never end, should you opt to hit the (metaphorical) pause button on the role-playing game's main quest.
What happens in between, from your formative years in the shelter of Vault 101 and well beyond your eventual escape into the irradiated, postapocalyptic Wild West outside, evolves via a nice mix of guided narrative and player choice. Help a townsperson kick his drug habit and you'll earn good karma; feast on the corpses of your enemies in broad daylight, on the other hand, and people might think you're a little weird. How you deal with the challenges of the Capital Wasteland affects what nonplayer characters will fight by your side, where your early quest-hub town is, and also some details about the game's final chapter.
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