As promised, Bungie's Luke Smith has revealed the details of Halo 3's surprising new mode: a four-player
cooperative online adventure that lets you and up to three buddies take on the game's Campaign mode as a group. Calling
the mode "some of our greatest ever Halo experiences," Smith gave the following examples of how the
cooperative gameplay can affect the game:
While only two of these players will be able to share a single screen, you'll be able to add a third and fourth
either via local System Link mode or online through Xbox Live. And you won't all have to play as Master Chief – the
other three players will be totally different characters, as shown in this screen released today. Each character may
have a different starting weapon, but will otherwise be identical.
While there is no drop-in gameplay, you can start a multiplayer game from any of your previous saved checkpoints in
the single-player mode.
Co-Op In Halo 3 [Bungie]

