This Call of Duty: Black Ops thing appears to be taking off. You might remember the billionaire game from its position at the top of the NPD software chart tonight, a position it's held since its November release.

In a statement released this evening, NPD analyst Anita Frazier says that in that short time, Black Ops has already surpassed Wii Play as the best-selling game in history. Like, ever. Activision hasn't released specific US life-to-date sales numbers, but it sold 5.6 million copies in the UK and US on day one. And as of October, Nintendo claimed sales of around 13 million Wii Plays.