Microsoft has announced the Halo Master Chief collection. It includes Halo Combat Evolved, Halo 2, Halo 3 and Halo 4. All the content is unlocked from the start in all 4 games.
All the games will also run at 1080p 60 frames per second. It includes over 100 multiplayer maps, dedicated servers, 4,000 gamescore to start, Halo Nightfall (a digital series created with Ridley Scott), the Halo 5 beta, and more. The collection will be out on November 11, 2014 and will cost $59.99.