Up to four player co-op in Campaign mode on xbox live or system link like every other aspect of Halo 3, this mode is chosen from a lobby simply select Campaign, choose your network xbox live or system link and invite your friends to join you, or they can simply join your session once it’s set up and in a lobby but they cannot join a game once it’s in-progress. They will pop into your lobby instantly, and when you have all the players you need anywhere from one to four you can begin the game from the beginning or from any of your saved checkpoints.
Split-screen co-op is as ever, limited to two players per screen but they can if they wish join two other friends online or via System Link.

For fictional reasons, bungie decided to avoid Halo’s slightly surreal compromise of two identical Master Chiefs and rather, use this opportunity to expand the Halo universe just a little bit. Player one will control the Master Chief, player two will control the Arbiter and players three and four will get the chance to control two brand new Elite characters.

PLAYER 3 Sangheili

Name: N’tho ‘Sraom
Affiliation: Fleet of Retribution/Special Warfare Group/Special Operations
History: N’tho ‘Sraom is the youngest member of his Special Operations unit and is one of a growing number of human sympathizers amongst the Sangheili youth. He is a fairly typical young male adult Sangheili—he began compulsory military service at the end of adolescence, and remains unmarried with no close, non-familial relationships outside of his martial order. N’tho Sraom refused to stand idly by while the Prophets replaced Sangheili units with Jiralhanae packs, and now bears deep resentment toward those Sangheili politicians who landed his kind in their current predicament.

Although N’tho ‘Sraom’s romanticized nationalism is emblematic of all Sangheili, he has developed a healthy respect for humanity—not for their physical abilities or martial prowess, but for their audacity and resolve.

PLAYER 4 Sangheili

Name: Usze ‘Taham
Affiliation: Fleet of Retribution/Special Warfare Group/Fleet Security
History: Although Usze ‘Taham was born into a respected merchant family he was fathered by Toha ‘Sumai—one of the preeminent swordfighters of this age. Usze graduated with