In Halo 2, the action picks up where the first game ended. Master Chief, with the help of a small group of marines, has destroyed the religious artifact and artificial world known as Halo, and is making his way back to Earth. Upon arrival, he and the last surviving Earth forces will mount a titanic final struggle against the marauding Covenant armada.
Pushing the Xbox hardware to its very limits, Halo 2 will expand on everything that made the original game great, plus add a wealth of technological and gameplay advances. Significantly improved graphics, enhanced artificial intelligence (AI), an advanced real-time lighting engine and destructible interactive environments are just a small part of Halo 2s evolution of design and technology. Every improvement in Halo 2 is designed to take gameplay to a new level -- and in the end, to tell a more compelling story. Utilizing Xbox Live to redefine online play, Halo 2 will deliver superior online multiplayer capabilities. Whether playing with a clan on a new multiplayer map, boarding a friend's Warthog, dogfighting in Banshees or checking player stats, Halo 2 will bring the social experience to a higher level via Xbox Live.
More information about Halo 2 is available at the official Halo 2 website.

