It is followed by last week's number one Brink in second and LEGO Pirates of the Caribbean in third.
Elsewhere, Crysis 2 leaps five places to fourth while Operation Flashpoint: Red River clings on in tenth position.
The top ten in full:
1. (-) L.A. Noire (Rockstar Games)
2. (1) Brink (Bethesda Softworks)
3. (2) LEGO Pirates of the Caribbean (Disney Interactive Studios)
4. (9) Crysis 2 (Electronic Arts)
5. (3) Call Of Duty: Black Ops (Activision)
6. (4) Portal 2 (Electronic Arts)
7. (7) FIFA 11 (Electronic Arts)
8. (5) Mortal Kombat (Warner Bros.)
9. (10) Kinect Sports (Microsoft Game Studios)
10. (8) Operation Flashpoint: Red River (Codemasters)
Leisure software charts compiled by Chart Track, (C) 2011 UKIE Ltd.