Activision and Infinity Ward's hit first-person shooter Call of Duty: Modern Warfare 2 once again led Chart-Track's all-platforms top 10 UK sales chart for the week ended January 2, the tracking firm said this week. The title, released on PC, Xbox 360, and PlayStation 3, managed to maintain the top spot despite a 41 percent week-on-week drop in unit sales, the firm said. It's the eighth week in a row since its November launch that Modern Warfare 2 has led the charts in the UK. Chart-Track's all-platforms chart lumps together sales of all versions of a given title. The remainder of the top 10 for the week is a shuffle of the previous week. Ubisoft's Assassin's Creed II continued its strong placement on the charts, coming in at number two, up from third a week prior. Unit sales dropped 36 percent week-on-week for the title. Mario and Sonic at the Olympic Winter Games also has shown staying power, rising from fifth to third, week-on-week. Ubisoft's Just Dance rose from 12th to seventh, pushing Microsoft and Turn 10's Forza Motorsport 3 out of the number 10 spot to 11th. UK All-Platforms Top 10 1. Call of Duty: Modern Warfare 2 (Activision) 2. Assassin's Creed II (Ubisoft) 3. Mario and Sonic at the Olympic Winter Games (Sega) 4. Wii Sports Resort (Nintendo) 5. Wii Fit Plus (Nintendo) 6. FIFA 10 (EA) 7. Just Dance (Ubisoft) 8. New Super Mario Bros. Wii (Nintendo) 9. Mario Kart Wii (Nintendo) 10. James Cameron's Avatar: The Game UK Individual Platforms Top 10 On Chart-Track's individual platforms chart, which ranks individual versions of a given title, the Nintendo Wii hosted the most top ten games for the week with six total. Xbox 360 games held three spots, while PS3 held one. 1. Wii Sports Resort (Nintendo, Wii) 2. Wii Fit Plus (Nintendo, Wii) 3. Just Dance (Ubisoft, Wii) 4. New Super Mario Bros. Wii (Nintendo, Wii) 5. Call of Duty: Modern Warfare 2 (Activision, Xbox 360) 6. Mario and Sonic at the Olympic Winter Games (Sega, Wii) 7. Mario Kart Wii (Nintendo, Wii) 8. Assassin's Creed II (Ubisoft, Xbox 360) 9. Forza Motorsport 3 (Microsoft, Xbox 360) 10. Call of Duty: Modern Warfare 2 (Activision, PS3)