CHAPTER 4: The Source of it all

East Comm Tower: Travel east from your Skiff to a COG wall. Send Jack to open it. Inside, find a Longshot, climb a ladder, and defeat incoming Swarm. Collect 3 Components from a panel. Outside the gate, find another panel with 3 Components. Proceed to the open area.

East Comm Tower - Main Area: Reach the tower entrance on foot. Crouch through passages, navigating ice spikes and drops. An ice boulder will roll; take cover. In a large open area, face a Scion and Swarm Hunters. Enter the cave, find a Boltok, Gnasher, and Hammerburst. Climb a wall and slide down. Defeat a Carrier and Swarm. Dodge ice boulders uphill to reach the tower door.

East Comm Tower - Interior: Inside, go right down the stairs to find 1 Component. Grab Frag Grenades and a Retro Lancer. Send Jack through a vent to restore power, then connect him to the console to find the signal. In the next room, retrieve 1 Component from a shelf using Jack. Find explosives, a Snub Pistol, and a Gnasher. Head downstairs, go left, and collect 5 Components from a panel. Exit the tower to complete the mission and return to the Skiff.

North Comm Tower: Proceed to the north substation. Pass a broken tree and go uphill. Defeat enemies on a frozen lake, then more ahead with Snipers. Take the left path to avoid fire. Climb a wall near a crashed Condor; inside, find a safe with 3 Components.

North Comm Tower - Frozen Lake: Continue to a frozen lake with Rejects and a Stump with a Bastion on a bridge. Shoot the ice to defeat Rejects, then the Bastion and Stump. Cross the bridge and drop into a cave. A Warden and Juvies will appear. To the left, find a broken DeeBee with weapons and ammo. Head upwards to the tower door. Go right to find Rejects; stealth kill them if possible. Open a safe for 3 Components and resupply at weapon caches.

North Comm Tower - Interior: Enter the tower and go to the left room for 1 Component in a panel. Head downstairs and have Jack hack the console to find a new map location. Hack the door to the next room to find Jack's Cloak module. Use Cloak in the corridor to bypass turrets and exit the tower. Slide down the path, defeat two Swarm Snipers, and return to the Skiff.

Transmission Signal Source: Reach the signal location. Use Jack's Pulse to find the signal below the ice. You need explosives from the Abandoned Mines.

Abandoned Mines: Before the ice bridge, go right to find a tank with Incendiary Grenades and the 7th Collectible (Letter to Momma) on a crate. Pass through the bridge debris. Go right to a tree near rocks to find a train car with 1 Component. Near the mine entrance, find another train car with 1 Component. Pass the fence; to the right, find a wooden structure with the Torque Bow Relic.

Abandoned Mines - Interior: Advance to a cave. After leaving the cave, find a Buzzkill in a cabin. Go right to the derailed train. Find 1 Component on a box in a train car near the tunnel. Head back to the path, drop down, replenish ammo, and slide onto the frozen lake.