Here is a list of the top 10 best selling games in the US during January 2013.

1. Call of Duty: Black Ops 2 (360, PS3, Wii U, PC)
2. Far Cry 3 (360, PS3, PC)
3. Just Dance 4 (Wii, 360, PS3, Wii U)
4. NBA 2k13 (360, PS3, Wii, Wii U, PSP, PC)
5. Madden NFL 13 (360, PS3, Wii, PSV, Wii U)
6. DmC: Devil May Cry (PS3, 360)
7. Halo 4 (360)
8. Assassin’s Creed 3 (360, PS3, Wii U, PC)
9. Skylander Giants (Wii, 360, PS3, 3DS, Wii U)
10. FIFA Soccer 13 (PS3, 360, PSV, Wii, Wii U, 3DS, PSP)

Source