IIRC, We've had this thread before, but I'll participate....
Gears of War 3:
- 2.8 million first week. (+800k over GoW2)
- 5.7 million in 2011
- 7.7 million lifetime
Battlefield 3:
- 1.8 million first week (Xbox 360) / 1.2 million first week (PS3)
- 3.2 million in 2011 (Xbox 360) / 2.2 million in 2011 (PS3)
- 4.6 million lifetime (Xbox 360) / 3.4 million lifetime (PS3)
Uncharted 3:
- 1.0 million first week
- 3.0 million 2011
- 5.5 million lifetime
Modern Warfare 3:
- 5.8 million first week (Xbox 360) / 4.7 million first week (PS3)
- 8.5 million in 2011 (Xbox 360) / 7 million (PS3)
- 13.5 million lifetime (Xbox 360) / 11 million lifetime (PS3)
Skyrim:
- 0.9 million first week (Xbox 360) / 500k first week (PS3)
- 1.8 million in 2011 (Xbox 360) / 1.0 million in 2011 (PS3)
- 4.5 million lifetime (Xbox 360) / 3.0 million lifetime (PS3)
Forza Motorsport 4:
- 800k first week
- 1.8 million in 2011
- 4.0 million lifetime
Resistance 3:
300k first week
750k million in 2011
1.7 million lifetime
And just for fun.
Arkham City:
- 0.8 million first week (Xbox 360) / 0.6 million first week (PS3)
- 1.9 million in 2011 (Xbox 360) / 1.8 million in 2011 (PS3)
- 3.0 million lifetime (Xbox 360) / 3.2 million lifetime (PS3)
Assassin's Creed: Revelations
- 1.3 million first week (Xbox 360) / 1.1 million first week (PS3)
- 3.2 million in 2011 (Xbox 360) / 2.9 million in 2011 (PS3)
- 5.2 million lifetime (Xbox 360) / 5.3 million lifetime (PS3)