As ever, Microsoft has released a response to the NPD sales results -- revealing some interesting statistics about Halo 3 gameplay and boasting of third-party Xbox 360 sales of $154 million for the month of September.
Selling 1.5 million copies, Halo 3: ODST was the best-selling game of the overall NPD for September 2009; Xbox 360 claimed five of the top 10 titles.
According to Microsoft, since ODST's release, over five million unique players have racked up playtime with the two Halo 3 titles since the September 2007 launch of Halo 3. Including the original and ODST, gamers have totaled over 116 million hours of play.