Halo 4 Forerunner Walkthrough, How to Complete Mission 3 Alone on Legendary
“Forerunner” is the first mission in Halo 4 where you will encounter Prometheans, a faction of enemy new to the Halo franchise. In addition to new enemies, there 38 super ammo for sale are also new Promethean weapons that you will begin encountering in this mission. You will mostly use the light rifle, which is a 3-shot-burst headshot weapon similar to the UNSC battle rifle. You will need to use the light rifle as your headshot weapon throughout this mission. The Prometheans do not use covenant weapons, so you will rarely have access to a plasma pistol when fighting the them. Therefore, when you are fighting Promethean knights (the Promethean equivalent of elites), you will need to use different tactics to remove their shields. For the majority of this mission, you will use the Promethean suppressor, a fast firing assault rifle that deals high damage up close. Use a combination of your auto sentry (an armor ability), grenades, and suppressor fire to kill the Promethean knights. It is vital that you fight them alone, so be sure to kill any crawlers or watchers (the Promethean light infantry) in an area before you engage the knights.
You begin this mission inside of a forerunner teleporter hub with an assault rifle, a magnum, and a hard light shield. The hardlight shield is a practically useless armor ability, so swap it for one of the auto sentries located on the walls to either side of you. The auto sentry armor ability allows you to create a stationary, hovering turret that fires upon the enemies. Enemies will tend to shoot at the auto sentry instead of you, so it provides you with a great distraction. It also deals a fair amount of damage, so it helps you kill knights when fighting them with your suppressor. Once you launch the auto sentry, press the bumper again to recall it.
Walk into the main room of teleporter hub and insert Cortana into the mainframe. She will then create a teleporter to the first relay tower that you will need to disable in order to contact the UNSC Infinity. Jump through the vortex, and you will teleport into a cave a little ways away from the first relay tower. As you follow the path forward, you will see the first Promethean enemies; crawlers. Crawlers are somewhat similar to grunts; they can be killed with a single headshot and they wield the weakest weapons. Notice that the crawlers have much smaller heads than grunts, so you will need to aim carefully. Use your magnum to kill these crawlers with headshots, using the corner of the path as cover. If the crawlers begin to overwhelm you, launch your auto sentry and it will drive them back.