This weekend, Unreal Tournament 3 will be free to play again through Steam. You can start downloading the files now so you'll be able to play it the moment the free play period begins.

UT3 was free for two weekends in March to celebrate the release of the Titan Pack, a free downloadable update for the game. If you've still got the preloaded files from the last free weekend, presumably they'll work this time around too. Maybe you'll need to download a patch or something, though.

The Titan Pack added new game types, maps, weapons, and more to the game. The Unreal Tournament 3 Black Edition that you can play free of charge this weekend comes with this new content.