Halo Wars developers talk about the pure, minimalistic approach they took in creating the core gameplay elements for the upcoming Xbox 360-exclusive RTS. 'Less is more' in Ensemble's farewell title. It comes with a great deal of gameplay online/offline options.
Personally, the "3 on 3 vs. A.I." interests me the most, as they bring back those ol' Company of Heroes sessions with friends trying to take down the ludicrous A.I. on its most difficult setting...Not gonna lie, this best several hours of gaming I've spent playing RTS co-op with friends. If this is remotely close to what I enjoyed in the past, I might have to take more breaks from Left 4 Dead and Street Fighter IV come March 3.
Halo Wars Dev Diary: Core Gameplay Fun