Metroid is gendered. Using this from another comment, here Samus is at the end of the first game: http://en.wikipedia.org/wiki/File:Samus_at_the_end_of_Metroi... Do you think that appeals to women?
Do you have stats on the popularity of those games compared to other, gendered games? I'd be more than happy to look over them.
Does reality agree with this?