In the beginning of the level, as Foehammer will drop you off by the platform to the entrance of the control room, you will see Grunts running into the pressure doors to call upon their brethren. Now you have two options. 1) Board the Shade Turret and gun everything down. 2) Wait for the door to reopen and chuck a grenade over the oncoming crowds. The first option is a little bit risky, because if you're playing on higher difficulties, the Grunts will always get on the turrets before you can even get close. 1) Walk down the second level and blast the Major Elite (1) Take the route on your left or