The Master Chief’s epic journey covers six Halo games, collected here in a single integrated experience built for PC. Whether you’re a long-time fan or are meeting the Master Chief for the first time, The Master Chief Collection is the definitive Halo gaming experience.
Inside Xbox just announced it. They're going to be releasing Reach first.
Opens the door for mods and proper aiming as well as having 3 and Reach on PC at last.