The duel campaign makes Halo 2 very unique when compared to other Halo games. We got to see the human perspective with the Master Chief and the Covenant perspective with the Arbiter, which was really cool. The campaign had cool characters, an awesome story, and an insane amount exploration thanks to glitches. We got to play online competitive multiplayer for the first time with a Halo game which was an amazing experience. I attended/hosted numerous LAN parties where Halo 2 always took center stage. Halo 2 LAN parties were some of the most fun gaming experiences I've ever had. All the new features were amazing, like being able to board vehicles, duel-wield, and having more in-depth character customization just to name a few.