P-Body was underwater, along with several dozen mobile turrets. They were in a fast moving river that was used to cool Epsilon Charlie Tango, a Combine Factory producing a new combine super-soldier. GLaDOS had three stages to the attack: Sending in teams to destroy fans, coolants and block the river as well as destroy the generators, join the Resistance in capturing the area's mainframe and download the plans for the Combine War Machines, preferably without the Resistance finding out. P-Body waited as her clock counted down, until she was in time with the fans down at the end of the river. Then, she let go of the rock she was holding onto and the currents shot her down the river as the turrets turned off their automatic grips, and followed close by. They sped through the water, until they sped past the fan blades, centimeters away. They hit the filter with a metallic thud, and P-Body turned on her magnetic arms, before climbing up the filter and appearing on the damn, where a worker frantically tried to run. P-Body took out her sniper rifle and fired repeatedly, again and again, killing every worker at the dam, before making trips to the bottom of the filter and setting up the mobile turrets, who scuttled towards the generators, fans and coolants to attack. P-Body climbed to a guard tower and started stocking the bottom floor of the tower with explosives, before destroying the tower as it fell and jammed into the river, blocking it up. She heard small explosions detonate and listened to the back-up generators power up and overheat quickly, before shutting down. She heard the Resistance begin to attack, and climbed the second watchtower to provide cover support.

Atlas also got an upgraded body. Of course, his new body was a giant version of his, with several turrets and a built in mini-gun and grenade launcher, with a radio uplink to artillery gun. He was going to blow the gates to shreds, and help the Resistance storm the facility. He kicked his leg at a Combine Soldier before firing his mini-gun and slaughtering the workers trying to set up barbed wire to break up the Human Charge. Atlas fired an artillery barrage at the watchtower, before firing his grenade launcher at a group of workers trying to escape out of the gap in the defenses. He charged forward and commanded his allies to charge forward.

Chell fired her portal gun, jumping through the portals, deep in the incinerator rooms of Epsilon Charlie Tango. She had attached her portal gun to an old Aperture Drill Prototype, a robot that drilled down into the incinerator rooms, before firing a portal. She maneuvered past workers, but the soldiers had all been pulled out to defend the breach. Her mission was to destroy the base. She'd seem what GLaDOS could so with Neurotoxin. She didn't want her betraying the resistance and getting her hands on Combine Tanks, Cyborg Soldiers and Battle-suits. She continued firing her portal gun and weaves her way to the Core.

She shot a portal across the room, and jumped through, landing on a large platform. She walked up to the console and began trying to hack the security. It took her a long time, nearly an hour. She heard the sounds of battle come closer, destroying everything upstairs. She had less time. She smiled as she put in the last sequence, and the doors opened, revealing the core.

It was a miniature sun, with huge areas of solar panels around it. It was the main generator, the power source to the entire factory and surrounding area. She would destroy t. She began typing into the console, and the sun began pulsing. Then the butt of a gun hit her in in the side of the head. She looked up, and standing there was HAL."What are you doing?" She asked.

He grimaced.

"You left the portals open."

"We need to destroy the core. We can't let GLaDOS take over doomsday devices that can destroy the world."

"She's my mother! We can't stop her!"

"You were a human once, you can stop her!"

"There's barely any human in me. This is a tool, nothing more. A weapon."

Chell grabbed a knife and slashed it, cutting a bloody slit in his ankle, before jabbing it in his foot and jumping up, before kicking him in the stomach. He punched the man in the chest, before tossing him into a wall, before grabbing his arm and twisting it around. He kicked her and started punching her in the stomach repeatedly. She dodged a punch and pulled oh his Desert Eagle and aimed it at her head, but he punched the gun out of her hand. He pulled out the knife and slashed it at her. She grabbed the gun and shot him through the head. There were sparks, as she began typing, tears blurring her vision. She took out a walkie-talkie and turned to the Resistance channel

"You need to retreat! This place is going to blow!"

"What? What are you talking..."

"You have three minutes."

Chell finished typing, and her finger hovered above a small black button under protective glass. She took a deep breath and counted. Ten seconds. Twenty. Thirty. Forty. Fifty. Six...

"No!" A metallic, deranged voice yelled. A metallic claw grabbed her from behind and she yelled.

Atlas was punching a Combine drop ship trying to bring in reinforcements when he got the order to retreat. He paused for a second, before getting P-Body and pointing to a door. P-Body nodded, and walked down the hallway. She kicked open a door, and found an injured Combine Elite dragging himself away from two dead Rebels, leaving a trail of blood. P-Body snapped his neck, and looked at the mainframe. She plugged in a wire from an opening slot in her plating, and started downloading the plans and schematics.

She watched as the data flashed onto her screen and went to the satellite where it was sent to GLaDOS mainframe. She noticed a large amount of data at the end of the transfer list. Project Dawn-Breaker. She popped it up to the front of the list and it began downloading.

HAL, the cyborg-robot comrade Chell knew was at one stage James Clancy. He was a worker at Aperture, who had filed, recorded and documented many of their patents, like Repulsion Goo. Then there were alarms, and he spent the last few minutes of his life choking and puking up blood, desperately trying to crawl away from the AI.

Then he was on a table, what felt like seconds later. There were robotic arms, ripping him apart and sewing him up, planting things in his brain. From then on he was like a dog. He did what GLaDOS said, nothing more. He would have made the old him, James, sick. He did what he was told, until he met the humans. They were... familiar. They reminded him off people. Friends? Family, maybe? He couldn't remember. He had liked her from the start. She reminded him off freedom. He realized he was killing her. His hands were around her neck, strangling her. He let go. He looked at her.

"Chell." He said.

His words came out as a mechanized shriek, painfully loud. He grimaced as he looked at her. Her nose was broken, tears and blood streaking down her face. He picked her up and carried her to the drilling hole, and fired a portal near the top, and one at his feet. He tossed her through, and fired the gun to his right and left, before throwing the gun off the balcony. Part of him realized he was going to die. Part of him was trying to stop, stay away from the console and if all fails, force him to have a muscle spasm that would force him over the railings. No, not part of him. Part of it. The machine that was part of his brain now. He walked over to the console while struggling to subdue machines in his head. He pressed the button, and smiled, watching the core shift and change color from gold to red. Then the machines took over, and HAL was in charge. It frantically tried to type, try to erase what it had done when the core imploded.