HALOOOOOOOO on 17 November 2008
If anyone says any answer besides Halo 3 they aren't serious. I can maybe see it reach that mark next year. The first Halo sold 1.1 million copies in 2004 (9th best selling game that year), and it most likely was because Halo 2 was right around the corner.
Check NPD numbers for that stat, as VG Chartz only tracks the Japanese sales of it...
