John 117 crash lands into the forerunner planet. Chief is knocked out by the impact after a few seconds later cortana says chief wake up (her voice echos) the helmet starts to reboot. after it fully reboots cortana says "have a nice nap" chief looks at his surroundings (now it goes into third person) chief starts looking through the rubble to find a health kit or weapon. finds both. (black screen the words pop up "HALO 4" then black screen ends and shows chief running up a cliff and shows forerunner structures, a vast open environment and sentinels flying in the distance (chief jumps down and mission starts)