The PC version of Battlefield 3 has been leaked to various torrent sites over a week before its official UK launch on October 28.
Dark Side of Gaming says the download is 9.96GB in size and offers a fully playable version of the shooter's single player campaign.
We've contacted publisher EA for confirmation of the report and any additional comment.
Earlier today, developer DICE revealed the final multiplayer maps that will ship with Battlefield 3 at launch.
Last week, EA released a Battlefield 3 trailer focusing on the game's destruction gameplay.