I have played halo 3 for a while, but when my disc broke recently, I turned to halo 2 to get my fix. The first few games I was suprised because while I used to be awesome at halo 2, I was getting killed. After a while, my aim adjusted to this system, with players able to move around rapidly and dodge my shots. Later, I played some lone wolves and my BR skills were through the roof. I play on a sensitivity of seven on both games and would definitely recommend cracking out the old halo 2 copy for those who would like to improve.