http://halo.xbox.com/en-us/intel/titles/halo3
Im not sure if these are sold or shipped but either way it seams halo 3 is the best selling 360 game ever. obviously if its shipped than blackops(probably shipped 14M+) will likely beat that number but still thats amazing. Vgchartz has it 11.36 so thats a pritty big differance. and even if it is shipped its not much of a differance, the game is so old theres probably only 200k copies or so on shelves. Meaning we have it undertracked here unless you guys think it was downloaded 2 million times.
Halo MCC will sell 5+ million copies(including digital)
halo 5 will sell 10 million copies(including digital)
x1 will pass ps4 in USA, and UK.