Bioshock 2 entered the UK all-formats chart at number one this week with sales exceeding those of last week's number one Mass Effect 2, making it the biggest release of the year so far.

In turn, Mass Effect 2 was knocked down to eigth position with a decrease of 58 per cent in sales.

Ubisoft's Just Dance remained at number two from last week, and FIFA 10 saw a 53 per cent increase in sales elevate it to number three following price promotions at retail.

Call of Duty: Modern Warfare 2 slipped from three to four, and Dante's Inferno dropped from four to nine.

Moving in the opposite direction was SEGA's Bayonetta, which rose from 38 to number 10.

The full Chart-Track UK top 20 is as follows:

01 Bioshock 2
02 Just Dance
03 FIFA 10
04 Call of Duty: Modern Warfare 2
05 Wii Sports Resort
06 New Super Mario Bros Wii
07 Wii Fit Plus
08 Mass Effect 2
09 Dante's Inferno
10 Bayonetta
11 Mario & Sonic at the Olympic Winter Games
12 James Cameron's Avatar: The Game
13 Army of Two: The 40th Day
14 Madden NFL 10
15 Mario Kart Wii
16 Forza Motorsport 3
17 LEGO Batman: The Videogame
18 Peppa Pig: The Game
19 Assassin's Creed II
20 Grand Theft Auto IV

http://www.gamesindustry.biz/article...on-in-uk-chart