Halo 2 takes place in the 26th century. Humans, under the auspices of the United Nations Space Command or UNSC, have developed faster-than-light slipspace travel and colonized numerous worlds. Human worlds come under attack by a collective of alien races known as the Covenant.

Halo 2 Story Summary. The opening cutscene shows the two major plot threads that will progress through Halo 2: the fate of Master Chief, Sergeant Johnson, and the rest of the human forces, which includes Commander Miranda Keyes, the daughter of the late Captain Jacob Keyes, and Lord Hood, apparently a ranking official in UNSC; and the fate of an unnamed gold Covenant Elite we come to know as The Arbiter, who was in command of...