Humanity is locked in a losing war against a merciless alien collective known as the Covenant, with only the indomitable warrior known as the Master Chief between us and annihilation. His name is John-117, one of the last SPARTAN-II super-soldiers trained since childhood to be the sword and shield of humanity. Now you can experience the Master Chief's epic journey over four Halo games, collected in a single integrated experience that leverages the power of the Xbox One. This includes the remastered classic Halo: Combat Evolved Anniversary and Halo 2 Anniversary with new audio and high-definition visuals, the groundbreaking Halo 3, and the start of the Chief's new journey in Halo 4. Using the integrated interface you can play any of over 100 multiplayer maps, take advantage of our curated cross-game campaign playlists , strive to complete hundreds of new Achievements, or test your skill against the Halo community in score attack and speedrunning leaderboards.