LittleBigPlanet only managed 4th place in the UK all format games chart and fell to 19th a week later. This can only disappoint Sony as the game received rave reviews and 100% scores from magazines and websites.
Sony put the 4th place down to the competition at this time of year with Christmas just around the corner.
Gears of War 2, FIFA 09 and Fallout 3 were all released the same week.
Sony hope that word of mouth will help sell the game coming up to Christmas but Sackboy may need a strong advertising campaign to help.
If you remember the game was delayed due to problems with the sooundtrack (see other gamezplay posts) and that didn't help.
Then lots of user generated levels were deleted due to copyright reasons, if ever a game got off to a shaky start then Sackboy's Little Big Planet was a great example.