Half-Life 2 storyline
This article describes the Half-Life 2 storyline, chapter by chapter.
The original Half-Life takes place at the Black Mesa Research Facility in 200-. During an experiment, researchers at Black Mesa accidentally cause a Resonance Cascade which rips open a portal to Xen, a parallel universe, and the only known borderworld. Creatures from Xen flood into Black Mesa via the portal and start killing everyone in sight. The player takes on the role of Dr. Gordon Freeman, one of the research scientists who has been involved in the accident, and who now must escape the facility.
At the end of the game, a mysterious figure referred to as the G-Man extracts Gordon from Xen, where he defeated the leader of most of the Xen forces, the Nihilanth, and "offers" a job to Gordon. Forced to agree, Gordon is subsequently put into stasis for approximately twenty years.
 Chapter 1: Point Insertion
Half-Life 2 begins with the chapter Point Insertion which serves as an introduction to the game world. Here, the player begins to learn of the events that took place and what the Earth has become in the intervening time period between Half-Life and Half-Life 2. The player learns this information through the characters he meets as well as hints from the environment.
About twenty years after the Black Mesa Incident, the G-Man removes Gordon Freeman from stasis and inserts him into a train on the way to City 17. A couple of citizens in the same car talk about city life and the process of being transferred. Arriving at the station, Gordon exits the train to find the world under the control of a vast interdimensional empire known as the Combine. He witnesses armed police officers known as Civil Protection and is greeted by the image of Dr. Wallace Breen who is broadcasting a message on a large screen welcoming the new arrivals to City 17. Gordon is ordered away from the rest of the citizens into a small interrogation room in which he meets former Black Mesa security guard Barney Calhoun, now undercover as a Civil Protection officer. Barney contacts Dr. Isaac Kleiner, who greets Gordon warmly. After a bit of discussion, they decide to send Gordon over to Kleiner's Lab, though he must find his own way there as Barney cannot abandon his post without raising Civil Protection's suspicions. Along the way, Gordon catches a glimpse of the Citadel looming in the distance. While moving through apartment buildings, Gordon finds himself right in the middle of a Civil Protection raid, barely escaping with his life, and being rescued from certain death by a young woman named Alyx Vance.
 Chapter 2: "A Red Letter Day"
This chapter mostly consists of character interaction, introduction, and plot exposition, setting up Gordon Freeman's goal for the next two chapters.
Gordon finds his way to Kleiner's lab with Alyx's help, with Alyx revealing more information about the state of the world and Wallace Breen. It is revealed that Dr. Breen was formerly the administrator at Black Mesa during the events of Half-Life. Alyx explains that she is part of an underground network known as the Resistance and has been helping people escape the city on foot; she also reveals that they have just developed a 'better way' of moving them, which turns out to be a teleport. At Kleiner's lab, it is decided that Gordon and Alyx should be teleported to Black Mesa East, the laboratory where Alyx's father Dr. Eli Vance is heading the resistance's scientific research operations. After meeting Kleiner's pet headcrab Lamarr, Gordon receives the Mark V HEV Suit, the upgraded version of his old HEV suit from the Black Mesa Incident. Alyx is teleported to Black Mesa East successfully. When trying to teleport Gordon, however, Lamarr leaps onto him, causing the machine to malfunction and teleport him to various random places, including a desert, twice at Black Mesa East, the middle of the ocean (where he is almost eaten by an Ichthyosaur), and Breen's office in the Citadel, alerting the Combine to his presence. Finally ending up outside the lab where he started, Gordon is forced to head on foot to Black Mesa East by himself. Before he leaves, Barney gives him the infamous crowbar Gordon used at Black Mesa, telling him that he needs to travel through the extensive canal system of City 17 to reach his destination. As Gordon begins the journey, the Citadel is seen changing formation, and swarms of city scanners are seen flooding out in response to Gordon's arrival.
 Chapter 3: Route Kanal
This chapter details the first half of Gordon's journey to Black Mesa East through the canal network and reveals further information about the state of the Earth, the organization of the resistance, and the operation of the Combine forces. In this lengthy chapter, Gordon travels through the underground railroad, a network of resistance bases located along the canals established to help refugees escape. Gordon is continually on the run, being chased by the Combine, and the few resistance shelters he finds are quickly raided by Civil Protection, either being shelled or flooded with Manhacks. Gordon acquires his first firearm, the 9mm Pistol, and engages in frequent combat with Civil Protection forces as well as familiar alien enemies such as Barnacles, Headcrabs, and Zombies closer to the end.
The name of the chapter is a reference to the term root canal, the space within the root of a tooth, and the name of a dental procedure involving removal of the contents of the root.
 Chapter 4: Water Hazard
This chapter details the second half of Gordon's escape from City 17 through its canal system to Black Mesa East. Aboard an airboat, he fights off numerous Civil Protection units and a Hunter Chopper.
The name of the chapter is a reference to the golf term water hazard.
 Chapter 5: Black Mesa East
This chapter sees Gordon reaching his destination, Black Mesa East, after a series of chases through the canals. Gordon meets Dr. Judith Mossman for the first time and is reunited with former Black Mesa scientist and current resistance leader, Eli Vance, along with Alyx. Gordon is also introduced to the Zero Point Energy Field Manipulator, also known as the Gravity Gun, a physics manipulator that quickly becomes indispensable, and Dog, Alyx's robotic "pet." Alyx takes Gordon to the scrapyard in order for him to practice with the Gravity Gun. Along the way, they pass by a sealed off tunnel to a place called 'Ravenholm', of which Alyx speaks fearfully. While Gordon is playing with Dog in the scrapyard, Alyx spots Combine Scanners sweeping the area, shortly before an all-out aerial raid on Black Mesa East. While attempting to rejoin the others, Gordon and Dog are separated from Alyx by a collapsed ceiling, and Gordon is forced to escape down the tunnel to Ravenholm.
Like "A Red Letter Day," this chapter is full of insight and dialogue about the current state of the world, the people in it, and the aftermath of the Black Mesa Incident.
 Chapter 6: "We Don't Go To Ravenholm..."
This chapter details Gordon's journey through the ghost town of Ravenholm. Originally a hidden village that lived free from the rule of the Combine, it was discovered and attacked by hundreds of Headcrab Shells, transforming almost the entire population into deadly Zombies. This chapter also introduces two new headcrab variants, the Poison Headcrab and the Fast Headcrab, and their zombie counterparts. The chapter title is a reference to a comment made by Alyx Vance in the preceding chapter while showing Gordon around the base. Gordon makes his way through the town, fighting zombies and avoiding bizarre man-made deathtraps. Gordon eventually meets the man who set them up: Father Grigori, a mentally unstable man claiming to be a priest and likely the sole survivor of the shelling. Grigori gives Gordon a shotgun and guides him through the town. Gordon and Grigori join at the church and make their way to an old mine with a path leading back to City 17. After battling through the graveyard to the mine entrance, Grigori declines to leave with Gordon, opting to remain in the town. As Gordon departs, Grigori continues fighting the zombies until disappearing into a blazing fire inside a crypt.
 Chapter 7: Highway 17
In this chapter, Gordon is informed that Eli Vance has been captured and taken to Nova Prospekt and sets out on a journey along Highway 17 to rescue him, making use of a resistance Scout Car with a tau cannon attachment. He encounters Combine Soldiers for the first time, as well as a new type of alien, the Antlions. Colonel Odessa Cubbage is also met in this level, giving Gordon the RPG, which Gordon uses to defend a resistance outpost from a Combine Gunship.
This chapter is full of insight on the environmental damage done to the Earth caused by the Combine invasion. The water levels along the cost are seen to be drastically receded, with ships stuck on the sand and docks a good distance away from the water, implying mass drainage of the oceans by the Combine. The water is also discovered to be filled with deadly leeches. There are also many old houses located along the coast, some being home to resistance members and escaped refugees, most having been raided by Combine troops.
 Chapter 8: Sandtraps
This chapter details the second half of Gordon's journey to Nova Prospekt. After crossing through the last part of the coast without the Scout Car, he encounters the first Antlion Guard. After defeating it, an ally Vortigaunt extracts a pheropod from the body which allows Gordon to control Antlions. The Vortigaunt trains Gordon in its usage at a nearby resistance camp. Gordon then continues along the coast, leading groups of Antlions and battling his way through Nova Prospekt guards set up in bunkers on his way into the prison.
The name of the chapter is a reference to the golf term sand trap, also known as bunkers.
 Chapter 9: Nova Prospekt / Entanglement
 Chapter 9: Nova Prospekt
In this chapter, Gordon leads an assault on Nova Prospekt, a Combine base and former prison, and breaches its defenses with the help of an army of Antlions, with the goal of finding and rescuing the captured Resistance leader Eli Vance. This is the last chapter in which Antlions are encountered, as the player soon leaves Antlion territory. Gordon fights his way through Nova Prospekt's defences, including prison guards and sentry turrets, as well as creatures such as headcrabs and zombies and two Antlion Guards, eventually making his way to the train depot. During the assault, a prerecorded message from Dr. Breen is overheard in which he berates the Combine Overwatch for their inability to stop Gordon.
This chapter offers a view into the creation of Combine soldiers; un-suited Combine soldiers are seen at several points through video footage on operating tables with various mechanical implants in their bodies.
 Chapter 9a: Entanglement
In this chapter, Gordon meets up with Alyx Vance in the Nova Prospekt train depot. They discover that Dr. Mossman was actually a Combine spy working on Breen's side. Together, they search the prison for Eli Vance and Judith Mossman, all the while fighting off security forces. They split up several times, but finally they reunite to track down Mossman. Alyx plans to use the Combine teleport to transport her, Gordon, Eli, and Mossman to Dr. Kleiner's lab; however Mossman manages to trick Alyx, teleporting herself and Eli out of the facility to the Citadel. Alyx and Gordon are forced to take the risk in using the same teleport again to get back to Kleiner's lab. As they teleport away, Overwatch Elites are glimpsed for the first time as they storm the teleportation room.
 Chapter 10: Anticitizen One
Upon arriving in Kleiner's Lab after teleporting away from the Depot, Gordon Freeman and Alyx Vance discover they have been stuck in a teleport "loop" for a week's time. They learn that their teleport caused the destruction of Nova Prospekt, and the blow they struck there was taken as a sign to begin the Uprising. The two factions have been locked in combat for a week and all of City 17 is a warzone. Gordon goes on to aid in the battle, while Alyx remains in the lab to help Kleiner escape the city. Dog initially fights alongside Gordon but is separated from him as he attempts to destroy a Combine dropship, getting carried away by it in the process. Gordon joins up with various squads of citizens, and together they fight their way through the city towards Barney's location. Near the end of the chapter, Alyx returns to help Gordon but is captured by Combine soldiers and taken to the Citadel.
 Chapter 11: "Follow Freeman!"
This section involves heavy urban combat, aided by resistance members, against Striders, Gunships, and both regular and elite Combine Soldiers.
Gordon teams up with Barney, together leading a battle at the Overwatch Nexus and disabling a generator powering a suppression device that is hampering resistance attacks, eventually fighting their way to the foot of the Citadel. There, they encounter Dog who is running rampant through the streets looking for Alyx. Dog provides a pathway into the Citadel by lifting up a portion of a Combine Smart Barrier, allowing Gordon through.
 Chapter 12: Our Benefactors
After making his way into the Citadel through use of a Stalker pod, Gordon is caught in a Combine weapon confiscation field. This destroys most of his weapons except for the Gravity Gun, instead causing the field to malfunction and overcharge it. The Gravity Gun becomes infused with dark energy, making it much more powerful and capable of picking up and throwing organic beings. Making use of this newly-acquired weapon, Gordon fights his way through the Citadel against large numbers of Combine soldier as Dr. Breen attempts in increasing desperation to convince Gordon to surrender. Gordon is forced to enter another Stalker pod and is quickly discovered on camera, transferring him to the top of the Citadel directly to Breen's office.
 Chapter 13: Dark Energy
After being transported to Dr. Breen's office, Gordon is reunited with Eli Vance and Alyx Vance who are both being kept captive in Stalker pods as well. Dr. Breen tries once again to gain the allegiance of Eli, but after being refused, he prepares to send Gordon, Alyx, and Eli through a portal to the Combine Overworld. Dr. Breen also hints at the G-Man's influence, stating that Gordon's "contract was open to the highest bidder." Mossman protests, but after being brushed off by Breen, decides to intervene, releasing Gordon, Alyx, and Eli. Breen attempts to escape, fleeing to the Dark Energy Reactor at the very top of the Citadel to be transported himself to the Combine Overworld. Gordon gives chase, fighting his way through Combine soldiers along the way. Just as the portal to the Overworld opens, Gordon attacks the reactor using his Dark Energy-infused Gravity Gun, causing the reactor to fail and go critical. Just as the reactor explodes, the G-Man freezes time and addresses Gordon. The G-Man congratulates him on his success, stating that he has received "interesting offers" for Gordon's services. Gordon is put back into stasis by the G-Man who then leaves through a door of light with the final words: "In the meantime, this is where I get off."
The fates of Breen, Eli, Mossman, and Alyx is left unknown at the ending of the game, but Eli, Mossman, and Alyx's fates are revealed in the sequel. Breen's fate still remains unrevealed, however.
Like in its predecessors, Gordon never speaks and the player views the action through his eyes only throughout the entirety of Half-Life 2. There are no cutscenes, nor any discontinuities or jumps in time from the player's point of view. Due to the lack of cutscenes, the player never directly sees what happens in Gordon's absence. Some have criticized these design decisions as narrative holdovers from Half-Life, that effectively limit how much of the backstory is explained, however many have also highly praised the game's method of storytelling.
The ending of Half-Life 2 is also very similar to that of the original: after completing a difficult task against seemingly impossible odds, Gordon is extracted from reality by the G-Man. Gordon is smugly congratulated and told that "further assignments" should follow. The fates of many of the major characters, such as Alyx, Eli, and Judith, are left unexplored. Very few of the questions raised by Half-Life are answered, and several new ones are presented. The identity and nature of the G-Man remains a mystery. A number of these issues are addressed, however, in the sequel games, Episode One and Episode Two.
 See also
- The Orange Box Achievements for Half-Life 2
- Locations in the Half-Life and Portal universe for Half-Life 2
|Half-Life story arc||Half-Life storyline · Half-Life: Opposing Force storyline · Half-Life: Blue Shift storyline · Half-Life: Decay storyline|
|Half-Life 2 / Portal story arc||Half-Life 2 storyline (original storyline) · Half-Life 2: Episode One storyline · Half-Life 2: Episode Two storyline · Portal storyline · Portal 2 storyline|
|Overall||Half-Life and Portal universe · Timeline of the Half-Life and Portal universe · Canon · Recurring themes · Retcons|