GameplayĬampaign In Halo 2: Anniversary, Halo 2’s campaign has been fully remastered by Saber Interactive. A troubled development and time constraints forced cuts to the scope of the game, including the wholesale removal of a more ambitious multiplayer mode. In Halo 2’s story mode, the player assumes the roles of the human Master Chief and the alien Arbiter in a 26th-century conflict between the human United Nations Space Command, the genocidal Covenant, and the parasitic Flood. Halo 2 features a newly-built graphics engine with the addition of new elements to the game. Including an unlikely ally, that will dramatically alter the course of the Human-Covenant Conflict forever.