Fallout: New Vegas Was Originally Going to Be a 'Big Expansion' For Fallout 3 - IGN

Fallout: New Vegas definitely stands on its own as a full game, but it was originally conceptualized as a huge expansion for Fallout 3.

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Fallout: New Vegas Was Originally Going to Be a 'Big Expansion' For Fallout 3 - IGN

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Fallout 3 - Wikipedia

Fallout: New Vegas was originally meant to be an expansion for Fallout 3

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