Gamasutra has NPD's analysis of U.S. game performance at retail in March. This solely covers physical sales, and word is "software revenues at retailers in the U.S. dropped 26 percent to $585.1 million in March," while hardware declines were even more dramatic: "Hardware proved to be the biggest detrimental factor in an overall $1.1 billion industry-wide decline, with $323.5 million in hardware revenue representing a 35 percent decline from March 2011." They also offer a list of the top 10 titles at retail for the month:

1. Mass Effect 3 (360, PS3, PC)
2. Resident Evil: Operation Raccoon City (360, PS3)
3. MLB 12: The Show (PS3, PSV)
4. NBA 2K12 (360, PS3, Wii, PSP, PC, PS2)
5. SSX (360, PS3)
6. Street Fighter X Tekken (PS3, 360)
7. Mario Party 9 (Wii)
8. Call of Duty: Modern Warfare 3 (360, PS3, Wii, PC)
9. Naruto Shippuden: Ultimate Ninja Storm Generations (360, PS3)
10. Major League Baseball 2K12 (360, PS3, Wii, NDS, PSP, PC, PS2)