The Black Mesa Research Facility, operating in secret in 2001... Black Mesa was a place primarily dedicated to portal research. The portals they were studying led to the planet Xen, a world filled with high-value minerals and various alien life forms. However, one day, an accident during an experiment at Black Mesa caused an interdimensional portal to connect to Earth, allowing countless alien creatures to pour through. Subsequently, a new extraterrestrial organization known as the Combine invaded Earth, conquering the entire planet in just seven hours.
Age 45. Affiliation: Combine Soldier and Combine Charger. Birthplace: South Dakota, USA. Appearance: Wears thick armor covering his entire body, can summon an energy shield from his wrist, and wears a heavy gas mask.
Age 47. Affiliation: Former Black Mesa researcher, currently a member of the Resistance. Birthplace: Seattle, Washington, USA. Appearance: Wears the HEV Suit.
Age 24. Affiliation: Resistance. Birthplace: California, USA. Appearance: Wears a hoodie and jeans. She is the daughter of Eli Vance.
Affiliation: Citizens. Their freedom and rights have been stripped away and suppressed by the Combine, and they are constantly monitored by Combine Soldiers. They wear the blue jumpsuits mandated by the Combine.
Affiliation: Combine Soldiers. Originally ordinary citizens before the Combine took over Earth, they were brainwashed and modified by the Combine to become soldiers for their forces. Their equipment varies by unit type.
Affiliation: Combine Aliens. They invaded Earth one day after the Black Mesa incident and conquered the planet in seven hours. Their appearances vary greatly.
Age 52. Affiliation: High-ranking Combine official and Administrator. Birthplace: Alaska, USA. Appearance: Wears a brown suit.
Age unknown. Affiliation unknown. Birthplace unknown. Appearance: Wears a blue tie and a blue suit. It is unclear whether the G-Man is human or another alien species.
1. Citizens' Militia: A resistance group of armed citizens who banded together to fight back against the Combine's occupation of Earth. 2. Conscripts: A small number of U.S. military survivors from the Seven Hour War.
1. Headcrab: Small, four-legged, and grotesque. They latch onto human heads to control the host and parasitize them. 2. Barnacle: Bizarre creatures attached to ceilings. They hang long tongues down to pull in prey that gets too close. 3. Vortigaunt: Humanoid, one-eyed, and grotesque. They have the ability to fire electrical beams.
It is the year 2021, twenty years since the Black Mesa incident and the Combine's conquest of Earth. Today is no different from any other. Citizens live their lives in Combine-mandated clothing, surviving on the tasteless food rations provided to them. Throughout the city, Combine Soldiers continue their armed patrols.


Meanwhile, at a Combine Soldier base featuring a massive, combat-realistic training ground, Combine Chargers are undergoing various drills, including energy shotgun practice and energy shield deployment. Among them is a Combine Charger with extensive combat experience. His name is Ilajia, the protagonist of this story.
Checking his energy shotgun and energy shield This is Number 8942-g, all clear. Hmm... everything is in top condition. I shouldn't run into any trouble with gear like this. Patrol starts soon, so I'd better get ready.
Release Date 2026.10.03 / Last Updated 2026.10.03