The presentation is leagues better than the original, and although the campaign might be shorter by a wee bit, the story is far more interesting on the basis that you can play The Arbiter (arguably the coolest character in Halo, since Master Chief is for cockfags) alone. Plus, let's not even compare multiplayer, where the polish, modes and options of Halo 2 still outshine the best of what the genre has to offer on Microsoft's next gen console.