http://www.moddb.com/engines/unreal-engine-3/news/unreal-engine-3-free-to-indies if possible for empires 3 :> its much better than that shitty source engine
This reminds me I wanted to eval Unity. Also, we probably only will switch if the engine is far better than Source. And for sure not UE3 And UDK does not have engine access (as opposed to normal licensing) Irrlicht seems nice tho.