There are many reasons that I can't work on Unreal Engine 3 anymore. Unreal Engine 4 give me more freedom in programming, in the creation of animated scenes, in visualization, and all of this can work without loading screens and lags at 60fps with full dynamic lighting. UE3 game version is cancelled now. If you're wondering, you can download the latest beta (v0.6b) from links.
(And I will be happy if you do, it's very helps me. Thank you.)