theStream.tv staff members stream live Halo 4 gameplay from the single player campaign. br br Halo 4 is the first installment in the "Reclaimer Trilogy" of games in the Halo series and is a direct sequel to Halo 3. The game focuses on Master Chief and a Cortana, who is nearing the end of her lifespan. It is primarily set on an uncharted world called Requiem.