i think Halo2 have change much from originale gamn. Halo2 have bette r grafikk and lots of speed to explorje battlefield.there are also more weapons to use and you can take weapons from the enemy. Halo2 also let you use mor e then 1weapon each time and more matches with slayer like assult and CTF. now you can take the enemy vehicle in battle so you have a better sjanse to escape. i also like the maps to unlock with foundation,cyclotron and midship.