GFK Chart-Track once again presents the top 20 bestselling PC games in the U.K., this time for the week ending March 12. This week Dragon Age II leaps into the number one spot, as Dawn of War II: Retribution drops to number four after being last week's bestselling title. On a related note, MCV reports boxed game sales in the U.K. were down 22% in February, compared with February of last year.