Yakuzaice on 24 September 2010
Good idea, but like some other people have said, the ratio should just be for American sales. Any game that is American centric will have a really low ratio, and any game that is Japan or Euro centric will have a really high ratio.
Take DQIX for instance. Granted it just misses your cutoff with 35,345 preorders, but if you did look at the ratio it would be 70. It really isn't possible to extrapolate worldwide numbers unless you are comparing games from the same series. Even then, in an extreme case like DQ IX, a moderate increase in American preorders can have a drastic impact on WW sales. A 15k increase in the US would work out to over one million worldwide. Obviously this won't be the case in reality.
