Humanity is on the brink of extinction in the future. An object called The Traveler that possess great knowledge and technology came shortly after the present day and humanity was in their golden age expanding throughout the solar system. The golden age lasted for hundreds of years. Until The Traveler's greatest enemy called The Darkness came to the solar system and wiped out most of humanity. The Traveller has been silent ever since. They built a city under the The Traveler as a last ditch resort to save the human race. The ones who guard the city are called Guardians who possess powers gifted from The Traveler. Many Alien races have come as "minions" of the darkness .and they will stop at nothing. If you fail, humanity will be destroyed.
Did You Know?
Ever since the 1.1.2 Update was added into the game, New features, like new sounds and multiplayer mechanisms. With the update, some new secrets (Easter eggs) have been added into the game, one of them is a jukebox. This jukebox can be found in the lower, bar-like area of the Tower (the games social hub). When near the jukebox, one can play music from it. Most of the song clips are either remixed parts of the soundtrack, Paul McCartney
's song for Destiny, and a song named "Siege of Madrigal". This song has been an ongoing Easter egg put into every Halo game made by Bungie/343 . Except in the jukebox, it is changed to a dance mix. See more
If only the Nine would help...