It's been a pretty good game from the start, but I think the only thing that stopped it from taking over was the lack of mod features out of the box - much like QL. While the Titan Pack didn't solve that, I think it gives it a second wind, and there are now fully working mods to fill the gap. The free weekend and the discount pricing on Steam brought UT3 close to the top of the list on Steam sales. You should get it before it goes back to normal price on the 15th.