This subject is related to the Black Mesa Incident era.
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Sector C

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Sector C composite.jpg
Sector C
General information

200-, during the Black Mesa Incident


Black Mesa Research Facility


Black Mesa Incident


Black Mesa

Game information


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Half-Life: Blue Shift

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Half-Life: Decay

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Karen Laur[1] (textures)
Yatsze Mark[2] (textures)
Brett Johnson[3] (level design)
John Guthrie[4] (level design)
Kelly Bailey[4] (level design)
Marc Laidlaw[4] (story)

"They're waiting for you, Gordon. In the Test Chamber."
Black Mesa scientist[src]

Sector C, referred to as Sector C Test Labs,[5] is one of the seven main Sectors of the Black Mesa Research Facility.[5]

Anomalous Materials Laboratory[edit]

The Anomalous Materials Laboratory is a location featured in Half-Life in the chapter Anomalous Materials. It consists of test labs and control facilities and is the workplace of Gordon Freeman. It houses the Anti-Mass Spectrometer, a large machine used by the scientists to analyze materials, in the test chamber (also known as Test Lab C-33/a) which is also the source of the Black Mesa Incident. It is often seen or referenced throughout the series.


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Unnamed section[edit]

This area is only seen in Decay in the mission Dual Access. It is a sub section of the Anomalous Materials Laboratory located under the test chamber. It is supervised by Richard Keller from the control room of the Anomalous Materials Operations Center. The player characters operate the lower section of the test chamber and deliver the sample from here to assist the experiment.


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Area 3 Security Facilities[edit]

See also: Insecurity

The Area 3 Medium Security Facilities[6] is a location featured in Blue Shift in the chapter Insecurity. It is a hub used by the security guards as a base of operations and is the workplace of Barney Calhoun. It is connected to the H-E Particle Labs. From the surveillance room, the player can see Gordon Freeman walking by in the Anomalous Materials Laboratory and Gina Cross delivering the crystal sample to the test chamber.


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H-E Particle Labs[edit]

This small lab area is connected to the Area 3 Security Facilities and a tram station.


Sector C Line[edit]

Sector C is connected to the Blue Line of the Black Mesa Transit System.[5] Its inner line, the Sector C Line, is a medium-security area. From Area 9 Security Checkpoint, it serves the Level 3 Dormitories, the Area 3 Security Facilities, and the Anomalous Materials Laboratory. It is also briefly seen in Opposing Force in the chapter Welcome to Black Mesa.




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List of appearances[edit]

Main games[edit]



  1. Half-Life section on Karen Laur's personal website
  2. Textures section on Yatsze Mark's personal website
  3. Half-Life section on Brett Johnson's personal website (archived)
  4. 4.0 4.1 4.2 Half-Life 2: Raising the Bar
  5. 5.0 5.1 5.2 Black Mesa Transit System map
  6. Half-Life: Blue Shift instruction manual
Preceded by
Black Mesa Transit System
Half-Life story arc journey Succeeded by
Sector B
Preceded by
Black Mesa Infirmary
Half-Life: Opposing Force story arc journey Succeeded by
Black Mesa Transit System
Preceded by
Black Mesa Transit System
Half-Life: Blue Shift story arc journey Succeeded by
Sector G
Preceded by
Half-Life: Decay story arc journey Succeeded by
Sector A