The Covenant alien race threatens to destroy all humankind, and the only thing standing in its way is Master Chief, a genetically enhanced supersoldier. Master Chief returns in Halo 2, which features new vehicles, weapons, environments, and more. This time, you can interact with your environment, wield two weapons at the same time, board opponents' vehicles, and even switch sides to play the role of a Covenant Elite. Halo 2 also supports broadband multiplayer action via Xbox Live. 

Game Features 

The single-player campaign in Halo 2 isn't particularly lengthy, and it should take the average player 10 hours or less to crawl through on its default difficulty setting. The story starts you out as the Master Chief, the intrepid space marine that blew apart the Halo ring, a devastating galaxy-destroying weapon, in the first game, much to the dismay of the Covenant, a group of alien races who regard the ring as a religious artifact that will send them on "the great journey." The plot of the second game deals with the Covenant attempting to go on this great journey using another Halo ring, called Delta Halo. But there's plenty of political upheaval going on in the Covenant ranks, making it tricky all 

around. Add in a Covenant invasion of Earth, and you've got all the pieces required to throw these factions together again for another round of fighting--though since some of the Covenant races will be fighting each other, too, it's often easier to just run past all of the action. 

Even though the hour count for completing the campaign is already low, at times the game feels like it's dragging on, repeating the same corridors and same enemies a little too frequently. Toss in a couple of extremely underwhelming boss fights, and you've got a pretty solid campaign, with some good vehicle sequences to break up the first-person action.