This final objective string opens once you’ve deployed all nine beacons.
Turning Point
Head back to Hope Springs and hit up the Oil Refinery area west of the quarry, the place you may have noticed was always covered with Cell. Finally bust in from any direction.
Remember to slightly scale down your arsenal, so maybe go proximity frags, sniper, and anything else. Many targets with guns.
Your goal is to hit the four valves spead at all ends. The hard part is clearing the side enemies, as the marked valves are of course prime for a nice explosive. Not much I can say about clearing enemies, they spawn all over, so just clear the guys above you at the valves and turn them so you can move on; don’t try to full clear this place.
The final step here is to head for the north end and hit a valve on a pier. Thing is, Cell have respawned all over and the pier is heavily entrenched with the beefiest they got. If you can grab a grenade launcher off someone, do so because it will make the path cutting much easier. Then just pop the pier with an explosive to clear it; hide in the water if needed. Turn the valve, grab some ammo and grenades, and get ready for the final main objective.
