Get to the transmitter | Forerunner Halo 4 Guide
Last update: 11 May 2016
At the end you find an elevator riding to a radiation power source. Turn it off. Go through two open portals. Go through door on left or right (screen). You get into a middle of fight. Staying behind, try to kill as many enemies as you can.
Via the platform go left and through door at the end. Inside get on a hidden elevator (screen). Staying in elevator's room kill enemies outside.
When you kill all, enter the platform on left and go up. Replenish ammo on the way. Kill enemies on the top. There are covers - use them. In case of need retreat. After the fight, use a panel on at the top (screen).
Go higher and enter Ghost. Avoid obstacles, using acceleration. You have only one way, so finding a portal shouldn't be problematic.