Free UT3 Weekend From Tomorrow
And that's on Steam, obviously. Epic send word that the free weekend is intended to celebrate the 10th anniversary of the release of the original Unreal Tournament demo. Anyway, that means you can download Unreal Tournament 3 Black (which is the 2007 shooter plus add-on packs) and play the game through the weekend for no pennies.
In addition, the original Unreal Tournament will be on sale for $1.99, and both Unreal Tournament 3 Black and the Unreal Deal Pack will be available for 60% off through September 27.
And presumably if you fancy some mod action you can take the opportunity to download Prometheus, The Ball, and The Haunted.