Katilian on 11 February 2008
NPD aren't really official, they use estimates just like VGC except they have larger sample data, so they may be more accurate.
I'd consider official numbers to be numbers released by the company themselves. While this number represents units sold to retail rather than consumer, they are the most accurate numbers available, and from that you can usually generate a decent range as to copies sold. I'm not sure if any Manhunt 2 numbers exist from Rockstar though.
