Halo 2 is the sequel to Halo - the best-selling Xbox game to date. Halo 2's plot sees Master Chief and Cortana returning to Earth in an attempt to stop the onslaught of the Covenant, a terrifyingly aggressive alien civilization, bent on the conquest and destruction of any species that dares defy them. Master Chief will be called on to save the greatest prize in the Human colonies - Earth itself. Are you game?

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