TeamXbox get to play the first level of Halo 3.
"Not only did I get to see the campaign being played, I actually got to check out a sizable chunk of the game's first level. Before the action began, we found ourselves in the "Campaign Lobby" where players will be able to set up the game, selecting both the levels and the individual segments that make them up. All of the game's modes will start in a lobby of sorts, be it Campaign, Theater, or Multiplayer.
After a brief loading screen (during which particles come together to form a halo), we were thrown into the game's first level, which will be called Sierra 117. Jarrard was playing on the Heroic difficulty, starting at what was being referred to as "Rally Point Alpha." We were told that the part we were seeing was actually about a third of the way into the level, as they didn't want to ruin the opening for us. What we did notice right off the bat was the fact that while we were playing as Master Chief, our old buddy the Arbiter was fighting right alongside us and had a green arrow above his head that allowed us to spot him at any time. We asked Frankie about the, ahem, possibility of playing with a friend who was controlling the Arbiter, and he mentioned that, yes, that sure would be cool. Damn you Frankie!"