To celebrate the launch of the Titan Pack for UT3, you can play the brand-new Unreal Tournament 3 Black (which includes the update) for free this weekend, on Steam. Just to clarify this include he whole game. The expansion is just a patch, a free and huge patch, but still a patch. If you have the original game, you can download the Titan Pack now, for free. If you don’t have the original game, you can download the entire game to play it on Steam, this weekend. The file you’re downloading is 8GB, so I’m guessing it’s all of the game, including singleplayer-stuff, if you’re into that.
Just go to the Steam-page, click ‘Play now’, and it’ll start downloading.
UT3 page on Steam: http://store.steampowered.com/app/13210/