Toefactor on 17 March 2009
Well at any rate, if we're staying true to the OP's scenario in which both games are being released on consoles that are tied in sales the only logical way to try and predict a winner is to look at attach rates for each series.
I don't have the know-how or enough of a reason to care one way or another to actually do the research myself, but if anyone else wants to lay out some detailed numbers be my guest.
I'll predict that Halo has a higher attach rate than GT though.
