I never knew this before but the attach ratio for Final Fantasy games for the PS consoles were huge, sometimes as high as 1 in every 2 PS owners bought the game first week! So below is Final Fantasy 7 - 12 (excluding 11) with there released numbers, how many consoles were sold at the time it was released and how much consoles were sold during that week. Also the very last paragraph is my prediction of FFXIII sales if history repeats itself.
When FFVII was released there was 4.5 million PS consoles sold in Japan at the time, and FFVII sold 2 million first week! (about 5 days of sales) That’s almost 1 in 2 PS owners that bought FFVII! Close to 165K consoles sold first week.
When FFVIII was released there was 11 million PS consoles sold in Japan, and FFVIII sold 2.6 million for the first week, and it only had 3 days of sales. That’s about 1 in 4.5 PS owners bought FFVIII first week. A little over 100K console sold first week.
When FFIX was released there was 16.7 million PS consoles sold in Japan, and FFIX sold 2 million first week (and actually this is from 2 days of sales!). That’s about 1 in 8 PS owners bought FFIX in the first two days it was released. Around 65K sold for that week.
When FFX was released there was 5 million PS2 consoles sold in Japan, and FFX sold 1.9 million in it’s first week, that’s in 3 days of sales for that week. About 1 in 2.5 PS2 owners bought FFX first week. A whopping 172K PS2’s were sold first week.
When FFXII was released there was 20 million PS2 consoles sold in Japan, and FFXII sold 1.8 million in it’s first week, again only 3 days of sales for that week. So roughly 1 in 11 PS2 owners bough FFXII first week. And there was 67K PS2’s sold in Japan for that week, which is still impressive since it was selling at around 25K a week before that week.
So if history repeats itself for FFXIII and since it'll be on a new platform, there should be roughly 4 million PS3’s sold in Japan when FFXIII is release, and so the attach ratio should be about 1 in every 2.5 or 3 PS3 owners will buy FFXIII so that’s about 1.6 or 1.9 million copies of FFXIII sold first week. And if the PS3 remains around 20K or higher every week until FFXIII is released then it could hit close to 150K consoles first week. (Also depends if there’s a price cut around that time)