Red Alert 3?
The Command & Conquer series is a shell of it's former self. Red Alert 3 will be lucky to sell as well as Command & Conquer 3, which has thus far only sold 520k on the 360 in well over a year.
Socom: Confrontation came out only two days ago. Does that count?
Edit: Valkyria Chronicles selling 1.5 million? lulz