Halo 4 is the seventh installment in the bestselling Halo franchise for the Xbox 360. A teaser trailer shown at Microsoft's E3 Media Briefing on June 6, 2011 confirmed that Halo 4 is to be the first installment in the Reclaimer Saga. Set four and a half years after the events of Halo 3, Halo 4 continues the story of John-117 and Cortana left abandoned on the remains of the UNSC Forward Unto Dawn. The two survivors drift toward the mysterious world of Requiem and the ancient evil within.