Halo Wars : A RTS
Microsoft has announced Halo Wars, a real-time strategy game by Age of Empire creators Ensemble Studios, for the Xbox 360. Halo Wars is being developed exclusively for the Xbox 360, and takes place prior to Halo 1.

Halo was originally designed as an RTS, before becoming a third-person action title, and finally an FPS. and now this FPS is being converted into RTS… funny isn’t it.
Watch a trailer @ MetaCafe

