Halo was a good run and gun shooter... thats about it... nothing particularly new compared to PC FPS games. the indoor level design was pretty bad but the outdoor level design was really good. The driveable vehicles implemented well but they existed on PC since codename eagle days. Maybe it was new to consoles. The port was initially pretty shoddy. The first time i tried to play it on my 9800 pro, it was framing like crazy and dropping to the low teens at places which forced me to just dump the game midway. Returned back to the game after a few patches and driver updates on the same hardware and it was butter smooth at 1600x1200. I tried a bit of halo 2 on an xbox but gave up cos of the shoddy control scheme. There's no way an fps can be played with a stupid gamepad.