In truth though, I finished the campaign in one sitting that same night. I only played it on Normal though, I wanted to get to end of the story before I was spoiled. Playing through it now on Heroic, then comes Legendary.
Been clocking up some hours on Xbox Live as well, it's like Halo 2 only BETTER!
One of the cool features of the Halo 3 is the ability to take screenshots and movies from anywhere in the game. Here are a few I grabbed....
Level 2, filling some Brutes with my hot lead.
One of those Brutes up close, looking very angry.
Master Chief riding a Sentinel. This was really weird, I stepped off a ledge, and all of a sudden there was a Sentinel underneath me. COOL.