According to ELSPA and Chart-Track GfK's figures, Call of Duty: Modern Warfare 2 was the best-selling Xbox 360 game of 2009 in the UK, despite its November release date. The game, developed by Infinity Ward and published by Activision, also topped the UK PlayStation 3 and multi-format chart.

Modern Warfare 2's predecessors, 2008's World At War and 2007's Call of Duty 4, also appeared in the top 20.

FIFA 10, developed and published by Electronic Arts, was in second place and it too repeated its position in the PlayStation 3 and multi-format charts as well. FIFA 09 found itself in 16th place.

Key Microsoft-developed exclusive franchise Halo featured prominently in the Xbox 360 chart. Halo 3: ODST, Halo Wars, and Halo 3 all placed, while other Microsoft exclusives such as Forza Motorsport 3, Grand Theft Auto IV's episode bundle Liberty City, Left 4 Dead 2 and Pure kept cash registers ringing throughout the year.

Seven of the top 20 were released in October 2009 or later, making for a busy (and profitable) fourth quarter: Lego Batman, FIFA 10, Forza Motorsport 3, Episodes From Liberty City, Modern Warfare 2, Assassin's Creed II, and Left 4 Dead 2.

Need for Speed: Shift and Halo 3: ODST came out in September.

2009 Xbox 360 chart, UK
01. Call Of Duty: Modern Warfare 2
02. FIFA 10
03. Forza Motorsport 3
04. Assassin's Creed II
05. Halo 3: ODST
06. Call Of Duty: World At War
07. Resident Evil 5
08. Lego Batman: The Videogame
09. Grand Theft Auto: Episodes From Liberty City
10. Left 4 Dead 2
11. Pure
12. Call Of Duty 4: Modern Warfare
13. Need For Speed: Shift
14. Gears Of War 2
15. Halo Wars
16. FIFA 09
17. Batman: Arkham Asylum
18. UFC 2009: Undisputed
19. Grand Theft Auto IV
20. Halo 3

Source: Entertainment and Leisure Software Publishers Association