Great Post!
your week 4 number (8300) seems to be in line with Chart-Tracks own data: about 6800 copies of Motorstorm sold that week, and that was the highest selling PS3 game. Given the tie ratio for the console, that 8300 seems pretty spot on.
BTW: the 910 000 on this site is not Europe but OTHERS, thats ALL pal territories, Including Australia, Africa and so on, so all the other 100 000 comes from there. i think its a pretty good approximation.







