silicon on 13 November 2010
I would say.... perception of having a good story is important.
Good story should increase sales slightly through word of mouth and positive review scores in the long term but long term sales are diluted by used game sales.
Dragon Age: Origins has huge replayability due to story telling. Each of the origins stories are unique and amazing. There are some quirky things that pop up for playing different races and there are a slew of choices to make through-out. It's worthwhile to see how things turn out each way.
I think some games that sell well also have good stories, but their good stories is not what made the game sell well.
