At last read, this game is due to be set up like Republic Commando, in that you command a 4-unit squad to complete missions. It takes place before the original HALO (I believe) and you are defending the last Human settlement, Reach. It looks amazing, and I'm already working on customs of these characters! Well, at least, I'm in the planning stage. I can't wait for this one. I was a casual HALO fan, enjoying the 3rd game the most, but this looks and sounds incredible! Can't wait for the demo!