Which game will make the highest overall sales out of these two games combined sales? Lets assume MK Wii has an attachment rate of 50% of the current Wii user base of around 24 million. So I estimate that MK Wii will sell in its lifetime around 12 million copies. Now for GTA 4 being on the PS3 and 360. Combined current user base is around 30 million and I say attachment rate would be 50% on current figures that would result in 15 million copies of GTA 4 selling on the PS3 and 360.
So how do you people find these sales estimates?








