UK Software Sales for week ending 21/11: Modern Warfare 2 fends off AC II, L4D 2

El33tonline writes:

"For the second week in a row, Call of Duty: Modern Warfare 2 has taken perch atop Chart Track's UK Software Sales Chart, fending off valiant advances from newcomers such as Left 4 Dead 2, Assassin's Creed II and New Super Mario Bros. Wii in the process."