Rebellion and SEGA’s Aliens VS Predator debuts at No. 1 on Chart Track’s UK Software Sales chart this week, becoming the fastest selling game of 2010 in the UK, beating previous record holder (and last week’s No. 1) Bioshock 2.

Ubisoft’s Just Dance (sales up 55%) hangs on to the No. 2 position for the umpteenth week in a row, as Bioshock 2 (sales down 71% after a whopping first week) slips to No. 3 from No. 1 last week, while New Super Mario Bros. Wii (sales up 59%) jumps up to No. 4 this week from No. 6.

Fifa 10 (sales down 7%) tumbles to No. 5 from No. 3, Call of Duty: Modern Warfare 2 (sales up 4%) drops all the way down to No. 6 (scandalous!), and Wii Sports Resort (sales up 25%) also moves down two places, to No. 7 from No. 5 last week.

Mario & Sonic at the Olympic Winter Games (sales up 76%) shifts back into the Top Ten into No. 8 from No. 11, Wii Fit Plus (sales up 11%) drops to No. 9 from No. 7 and Army of Two: The 40th Day (sales up 13%) also recovers a Top Ten position at No. 10 from No. 13 last week.

The Top Ten All Format UK Software Sales Chart follows below:

• Aliens VS Predator (SEGA)
• Just Dance (Ubisoft)
• Bioshock2 (2K Games)
• New Super Mario Bros. Wii (Nintendo)
• Fifa 10 (EA)
• Call of Duty: Modern Warfare 2 (Activision Blizzard)
• Wii Sports Resort (Nintendo)
• Mario & Sonic at the Olympic Winter Games (SEGA)
• Wii Fit Plus (Nintendo)
• Army of Two: The 40th Day (EA)

Source: Chart Track