Black Mesa Research Facility

{{Otheruses|Black Mesa}}
{{Location Infobox
|image=FileBlack Mesa logo documents + text.svg|250px
|name=Black Mesa Research Facility
|constructed=1950s, then refurbished by Black Mesa before the Black Mesa Incident
|destroyed=200-, during the Black Mesa Incident
|location=WikipediaNew Mexico|New Mexico, USA, Earth
|builder=N/A, then Black Mesa
|era=Black Mesa Incident
|affiliation=Black Mesa
{{Quote|The biggest embarrassment has been Black Mesa facility, but I think that's finally taken care of itself.|The G-Man|Half-Life Opposing Force|FileOf7a0 gm01.ogg}}

The '''Black Mesa Research Facility''',''Half-Life'' '''B.M.R.F.''' for short,''Half-Life Decay'' is the headquarters of the Black Mesa|Black Mesa corporation, and the primary setting for ''Half-Life'' and its Half-Life expansions|expansions. It is located in the WikipediaNew Mexico|New Mexico desert, USA.''Half-Life''
== Overview ==
FileBS Cafeteria.jpg|thumb|right|200px|A fast food outlet seen by Barney Calhoun in the Black Mesa Transit System.

*The Black Mesa facility was apparently built over several decommissioned WikipediaIntercontinental ballistic missile|ICBM launching and testing silo complexes constructed during the 1950s,''Portal 2 Collector's Edition Guide''Several ''Half-Life'' texture files' names contain the word "fifties", suggesting the facility is as old as from the 1950s which was converted into a vast civilian institute for the research of almost every conceivable Black Mesa array|scientific discipline, loosely spread along seven main  Sectors|Sectors. Some areas are also described by characters such as Rosenberg as "old" or "abandoned"; several areas of the complex are badly run-down despite the obvious fact that they are still in use. However the surface areas of Black Mesa feature more modern construction.''''Half-Life Decay.html">Half-Life''''Half-Life Decay''''Half-Life Opposing Force''''Half-Life Blue Shift''

*Black Mesa's Black Mesa Science Team|Science Team undertakes the company's various scientific researches in the facility, which is a very high-security complex, as each employee is required to undergo a series of rigorous security checks to access most areas. Security guards, carrying firearms and trained for emergencies, are present everywhere. The complex is also equipped with retinal scanners and alarms, as well as heavy blast doors that may shut down in case of fire, explosion or other event. Black Mesa can be completely sealed from the outside.''''Half-Life Decay.html">Half-Life''''Half-Life Decay''

FileTram interior.jpg|thumb|left|200px|One of Black Mesa's modern electric trams riding along the Black Mesa Transit System.

*The facility is apparently self-sufficient, housing its own ventilation, plumbing, sewage, and power generation systems including a ''Half-Life.html">Hydro-Electric Dam''Half-Life'' and multiple types of electrical generators and reactors, some using nuclear technology.

*The complex is dominated by a bewildering number of underground laboratories, test areas (including a powerful ''Half-Life.html">Anti-Mass Spectrometer''Half-Life''), and administration offices, most of which contain very high-tech equipment, and even a rocket Sector E Altitude Launch Center|launch site.''Half-Life''

*The complex also features multi-story car parks (where only Black Mesa SUVs can be found), arsenals of nuclear and conventional weapons, and a local electric rail materials transport network, the Sector E Materials Transport.''''Half-Life Decay.html">Half-Life''''Half-Life Decay''

*All main Sectors are linked together by the Black Mesa Transit System, the monorail network going through the whole facility.''''Half-Life Decay.html">Half-Life''''Half-Life Decay''

*Black Mesa is also apparently kept supplied by a conventional freight rail linked to the outside, managed in the  Yard|Freight Yard.

FileOf1a4b tunnel.jpg|thumb|right|200px|An example of the state of disrepair of some parts of the facility, here in a roughly repaired toxic waste storage unit.

*As employees are required to live in the complex itself, Black Mesa contains many personnel facilities, including laundromats, recreation and sports areas such as lounges,''''Half-Life Decay.html">Half-Life''''Half-Life Decay'' at least one basketball court, at least one swimming pool,''Half-Life Decay'' a library,''Half-Life Decay'' fast food outlets, food courts,''''Half-Life.html">Half-Life'' cafeterias,''Half-Life''''Half-Life Decay'' and numerous vending machines.

*The facility is well-populated by rest areas and dormitories for the employees of the facility.''''Half-Life Decay.html">Half-Life''''Half-Life Decay'' As Eli Vance reveals at Black Mesa East that his Azian Vance|wife and Alyx Vance|daughter lived in Black Mesa with him, it can be inferred that employees' families reside in the dormitory complexes as well.''Half-Life 2''

*Black Mesa is equipped by a public address system, the Black Mesa Announcement System, relaying audible messages and announcements across the facility with a male voice. It is also used in the Black Mesa Transit System to give general information about the facility and mention each stop, with a female voice.''''Half-Life Decay.html">Half-Life''''Half-Life Decay''

*The complex also has its own newspaper, ''The Mesa Times'', although it is unknown if it is an outside publication or exclusively made by the company for its personnel.

*Despite being located in the middle of a desert, the underground and indoor sectors of Black Mesa are maintained at a "pleasant 68°" WikipediaFahrenheit|Fahrenheit (20° WikipediaCelsius|Celsius) at all times,''Half-Life'' enabled by Black Mesa's sprawling network of ventilation ducts.

*In the underground laboratories, administration offices and dormitories, the main sections are always indicated in important intersections areas, and follow color codes consisting of lines running along the corridors to the related location. Several colors can be seen running along corridors, stopping each time a related location is reached. This is seen for instance in the Sector C Labs and Control Facilities|Anomalous Materials Labs''Half-Life Decay'' and the Level 3 Dormitories.''Half-Life Decay''

*Overall, Black Mesa is as large as a city and is completely self-sustained in all fields.

*In the event of an emergency (such as leaks of dangerous materials, escape of specimens, or even government cleanups), the "military" (the Hazardous Environment Combat Unit|HECU) and in worse cases "trained assassins" (the Black Ops), referred to as "a dangerous and very efficient clean-up crew", are to enter the facility.''Half-Life Blue Shift'' instruction manual An intervention from the HECU and the Black Ops seems to be a known fact among the personnel, although some employees consider it a rumor.''Half-Life'' Black Mesa also contains many automated Automatic Turrets, which, when activated, will emerge from armored cupolas and fire upon any moving object in their line of sight.''''Half-Life Decay.html">Half-Life''''Half-Life Decay''

{{Main|Black Mesa personnel}}

Black Mesa employs in its facility two main groups of civilian employees a Black Mesa Science Team|science personnel and a Black Mesa Security Force|security personnel, along with various other inhabitants including administrative personnel, service personnel and occasionally the employees' families.

==The Black Mesa Incident==
{{main|Black Mesa Incident}}

Occurring on May 16|May 16, 200-,''Half-Life'' instruction manual the Black Mesa Incident is caused directly by a failed experiment in Sector C, triggering a Resonance Cascade. This leads to the invasion of the facility by Xen creatures, and finally its complete destruction by a Mark IV Thermonuclear Device|thermonuclear bomb.

FileIronic injury sign.jpg|thumb|right|200px|Ironic injury sign near a killed scientist in an early ''Half-Life'' screenshot.

The Black Mesa Research Facility, being a science research facility, presents numerous hazards to both health and safety. These can include

*Electrical hazards, from electrical apparatus and power systems
*Burning / heat hazards, from steam pipes, furnaces or any other hot apparatus
*Freezing hazards, from freezers and super coolants
*Acid / corrosive hazards, from countless acid and alkali chemicals in all different applications
*Radioactive hazards, from nuclear reactors and waste
*Biohazards, from biological waste and residue
*A risk of drowning in extremely deep water basins
*Being harmed / killed by underwater machinery
*A risk of fractures from falling, and / or machinery

Due to so many possible hazards being present in various applications all throughout Black Mesa, precautions must be taken. Certain areas call for the use of safety equipment, others will only allow entry when wearing an HEV Suit, a cleansuit or an armor vest and helmet. This point is backed up by security guards stationed at 'secure access' doors being instructed to only permit access if the entrant is wearing proper equipment.

Black Mesa also features an enormous supply of medical facilities and equipment. There are wall-mounted first aid stations, supplies of portable first aid satchels, infirmary areas. Many scientists are also trained in first aid.

The various Black Mesa facilities are loosely grouped into seven Sectors lettered from A to G, as well as various Areas and Levels, all linked together by the Black Mesa Transit System or Sector E Materials Transport. Many areas visited during the games have no known Sector; it is actually unclear if every single area always belongs to one.

The details about all the Black Mesa area names are given in signs found within the maps, character dialogs, Black Mesa Announcement System announcements and the games' instruction manuals. However many announcements are never heard in-game, only to be found in the file "sentences.txt" located in each game's sound folder, showing that many more messages were originally to be heard during the games. Each sentence has a map name before it, allowing a clear identification of the related area.

As many names and details appear in the Gearbox expansions, it is unknown exactly what the Gearbox team came up with, and what was handed to them by Valve. Regardless, the facility was created more to serve gameplay than to be a consistent facility with all sectors and areas fitting perfectly together; this is far from being the case. 

===Main Sectors===

====Sector A====
FileT0a00006.jpg|thumb|left|200px|The Holographic Assistant demonstrating a duck jump in the Training Facility.

{{Main|Sector A}}

Encountered in all four of the ''Half-Life'' games, Sector A contains the separate Hazard Courses used for training scientists''Half-Life'' (predominantly to the use of the HEV Suit) and security guards.


====Sector B====
FileC1a1c canal02.jpg|thumb|right|200px|Sector B's Lower Canal.

{{Main|Sector B}}

The Coolant Reserve located in Sector B apparently stores the industrial coolant used to maintain Black Mesa's thousands of computers and machines. It is first seen by Gordon Freeman when he escapes from Sector C. 


====Sector C====
FileC1a0e beam03.jpg|thumb|left|200px|The Anti-Mass Spectrometer in Sector C.

{{Main|Sector C}}

Sector C is notable primarily for housing the Anomalous Materials Laboratories, Gordon Freeman's workplace. This area contains the Anti-Mass Spectrometer (in Test Lab C-33/a), the initial source of the Black Mesa Incident, the starting point of the ''Half-Life'' series.


====Sector D====
FileHL BMRF OfficeComplex.jpg|thumb|right|200px|Sector D during the Black Mesa Incident.
{{Main|Sector D}}

Seen early in ''Half-Life'', Sector D is mainly a large underground complex of Administration Offices where the bureaucratic aspects of Black Mesa's upkeep take place, along with some limited research. It also contains some limited cafeteria facilities, as well as a very large walk-in freezer.


====Sector E====
FileOf4a2 biodome.jpg|thumb|left|200px|An underground habitat for Xen specimens in Sector E.

{{Main|Sector E}}

This sector features the Biodome Complex, a relatively recent area of the facility, containing a series of Specimen Observation Areas, where captured Xen CategoryXen creatures|aliens and CategoryXen flora and minerals|flora are kept and observed in artificial recreations of their natural habitats. Sector E also features the large Sector E Transport|Materials Transport, Black Mesa's freight monorail, the Sector E Altitude Launch Center|High Altitude Launch Center, where rockets are launched, as well as a large Sector E Storage Facility|Ordinance Storage Facility where the Mark IV Thermonuclear Device is set up and the Gene Worm teleports in.


====Sector F====
FileLambdaTeleportationSystem.jpg|thumb|right|200px|The Lambda Reactor Core in the Lambda Complex.

{{Main|Sector F}}

The heavily fortified Lambda Reactor Complex featured in Sector F is the site of Black Mesa's top secret teleportation labs. It features a huge reactor consisting of the Lambda Reactor Coolant System, and the cylindrical Lambda Reactor Core, as well as a large teleport.


====Sector G====
FileC2a5 dam02.jpg|thumb|left|200px|The Hydro-Electric Dam.

{{Main|Sector G}}

Sector G features the Topside Hydro Plant and its iconic Hydro-Electric Dam providing the power for the facility, and the Drainage Canals.


===Other areas===
The following areas are either not linked to a specific sector, or their specific sector is unknown.


====Alien Research Labs====
FileBio lab outside.jpg|thumb|right|200px|The Alien Research Labs building viewed from the outside.

{{Main|Alien Research Labs}}

Located near Sector G's Hydro-Electric Dam and partially above the Biological Waste Processing Plant, the Alien Research Labs cover the ''Half-Life'' chapter ''Questionable Ethics''. This is where the Tau Cannon is found.


====Alien Quarantine Labs====
FileDy lasers0037.jpg|thumb|left|200px|The laser consoles.

{{Main|Alien Quarantine Labs}}

Located under the Gamma Labs, aliens brought with the Displacement Beacon are studied there. Cross and Green are sent there by Keller to turn on a beam matrix to power the Displacement Beacon on the surface.''Half-Life Decay''


====Area 2 Administration Offices====
{{See|Sector B 2 Administration Offices}}


====Area 3 Medium Security Facilities====
{{See|Sector C 3 Medium Security Facilities and H-E Particle Labs}}


====Area 4 Personnel Dormitories====
{{See|Sector A 4 Personnel Dormitories}}


====Area 7 Recreational Facilities====
Whilst not seen in the game, a FileTram map 01.png|Black Mesa Transit System map featured in ''Blue Shift'' mentions Area 7. As Black Mesa's employees are required to live in the facility itself, Area 7 may contains comforts and diversions such as sporting areas, cafeterias, a cinema, shops and other personnel facilities. It is connected to the Green Line of the Black Mesa Transit System.FileTram map 01.png|Black Mesa Transit System map


====Area 8 Topside Dormitories====
FileTopside dorms.jpg|thumb|right|200px|Area 8 Topside Dormitories and the Transit System track passing through it.

{{Main|Area 8 Topside Dormitories}}

This area consists of outdoor dormitories where Barney Calhoun is accommodated while working at Black Mesa. A stop on the Black Mesa Transit System leads to the  Personnel Entrance|East Personnel Entrance.


====Area 9====
Features Area 9 Central Transit Hub and Area 9 Security Checkpoint.

=====Area 9 Central Transit Hub=====
{{Main|Cut missions from Half-Life Decay 6 Central Transit Hub}}

Area 9 Central Transit Hub is a hub mentioned in the tram ride at the beginning of ''Half-Life''. It can be seen in the transit map later in ''Blue Shift''. It is apparently the only Transit System station where high-security trains can be boarded.

=====Area 9 Security Checkpoint=====
Likely located not far from Area 9 Central Transit Hub, Area 9 Security Checkpoint is first seen during Barney Calhoun's tram ride at the start of ''Blue Shift''. There, Barney Calhoun transfers to the Sector C Line. Area 9 Security Checkpoint apparently acts as one of the many transit security checkpoints throughout the Transit System. Trams that pass through that checkpoint can be rerouted to the Sector B, C, and E Lines.


====Biological Waste Processing Plant====
FileC2a40001.jpg|thumb|left|200px|The plant as first seen by Gordon Freeman.

{{Main|Biological Waste Processing Plant}}

Visited during the ''Half-Life'' chapter ''Residue Processing'', the Biological Waste Processing Plant disposes of and processes Black Mesa's wastes through large tanks and an endless conveyor belt network.''Half-Life''


====Black Mesa Air Control====
FileDy signal055000.jpg|thumb|right|200px|Osprey on an airstrip of the Air Control.

{{Main|Black Mesa Air Control}}

This building is adjacent a large airstrip, and is used to monitor and direct activity in the airspace above Black Mesa.''Half-Life Decay''


====Black Mesa desert====
FileCliffs HECU.jpg|thumb|left|200px|View of the canyon from the cliff where a HECU soldier is waiting for Freeman.

{{Main|Black Mesa desert}}

This desert area includes several sandy areas with Land Mines, cacti and rocks, as well as several small HECU camps. There Freeman is chased by the AH-64 Apache that started attacking him at the dam, and finally defeats it when first finding the Rocket-Propelled Grenade Launcher (Half-Life)|RPG along a steep cliff in front of a large mesa valley, at the climax of the chapter ''Surface Tension''. 


====Black Mesa South Access====
FileSouth Access Tunnel.jpg|thumb|right|200px|Outside the South Access Tunnel.

{{Main|Black Mesa South Access Tunnel}}

One of the several known entrances to Black Mesa, it links it to the outside by a 5-mile tunnel. At its outside end Calhoun, Rosenberg, Bennet and Simmons reunite after teleporting.


====Black Mesa Transit System====
FileTram map 01.png|200px|Black Mesa Transit System map.|left|thumb

{{Main|Black Mesa Transit System}}

This is the extensive monorail network linking the many different Black Mesa Sectors, provided for the security and convenience of the Black Mesa personnel.


====East Personnel Entrance====
Connects Area 8 Topside Dormitories to the rest of the facility through the Transit System. An FileBlack Mesa orange flag.svg|orange flag of Black Mesa flies above it. Its name suggests there are other such entrances.


====Freight Yard====
FileBa yard50000.jpg|thumb|right|200px|Freight cars in the HECU-occupied Freight Yard.

{{Main|Freight Yard}}

A topside area of the Black Mesa Research Facility, it is connected to the New Mexico Railroad Line and used to ship freight in and out of the facility.


====Gamma Labs====
FileDy fubar0010.jpg|thumb|left|200px|The powered Displacement Beacon with its three crystals deployed.

{{Main|Gamma Labs}}

This facility was originally used "as a sort of cross-dimensional netting ground", where organic alien samples and creatures were captured from Xen without the need of actually going there, with the Displacement Beacon located in the nearby canyon.''Half-Life Decay''


====High Altitude Launch Center====
{{See|Sector E Altitude Launch Center}}


====H-E Particle Labs====
{{See|Sector C 3 Medium Security Facilities and H-E Particle Labs}}


{{See|Black Mesa Medical Lab}}


====Level 1 Main Facility Entrance====
Never physically seen within any of the ''Half-Life'' games and only seen on a FileTram map 01.png|Black Mesa Transit System map featured in ''Blue Shift'', the name of that area heavily implies that it is used as a central entrance checkpoint for all the facility personnel, and that it may be ''the'' entrance to Black Mesa. It is connected to the Green Line of the Black Mesa Transit System.


====Level 3====
As heard during Freeman's tram ride from Level 3 Dormitories on the day of the Black Mesa Incident, the Black Mesa Hazard Course Decathlon was to start on Level 3 around 1900. This never happened due to the incident.''Half-Life''

=====Level 3 Dormitories=====
FileDy dorms0027.jpg|thumb|right|200px|The swimming pool in the Level 3 Dormitories.

{{Main|Level 3 Dormitories}}

Located within Sector C, along the Sector C Line of the Black Mesa Transit System, this area is one of the only two personnel dormitories seen or mentioned during the games, the other being Area 8 Topside Dormitories. This is where Gordon Freeman lives while working at Black Mesa, and where Gina Cross and Colette Green search for a security guard who would have the clearance codes to lift the military air traffic lockdown.


====Medical Lab====
FileOf1a1 zombie01.jpg|thumb|left|200px|A Zombie grunt in the Infirmary.

{{Main|Black Mesa Medical Lab}}

After his Osprey is taken down by Alien Crafts, Adrian Shephard wakes up in a damaged Black Mesa infirmary, in an area that appears to still be under the control of Black Mesa personnel, who are caring for wounded HECU soldiers and studying Classic Headcrab|Headcrabs.


====Ordinance Storage Facility====
{{See|Ordinance Storage Facility (disambiguation)}}
{{See|Sector E Storage Facility}}


====Satellite Communications Center====
{{See|Sector A Communications Center}}


====Sector E Materials Transport====
{{See|Sector E E Materials Transport}}


====Section A-17 Prototype Labs====
FileRosenberg is pleased.jpg|thumb|right|200px|Rosenberg near the teleport in the Prototype Labs.

{{Main|Section A-17 Prototype Labs}}

A very old sector of Black Mesa, these labs are located below the Freight Yard. There Black Mesa's first teleportation experiments took place.  


====Silo D====
{{See|Sector D D}}


====Topside Motorpool====
FileBMRF helipad Osprey.jpg|thumb|left|200px|HECU troops being unloaded by an Osprey Heliplane.

{{Main|Topside Motorpool}}

First seen in the ''Half-Life'' chapter ''Surface Tension'', this area features the bulk of Black Mesa's still-functional military facilities, as well as maintenance and storage areas for the Black Mesa SUVs.''Half-Life'' 


====Waste Processing Area 3====
FilePit worm rising.jpg|thumb|right|200px|The Pit Worm in Waste Processing Area 3.

{{Main|Waste Processing Area 3}}

In a surface section of Waste Processing Area 3 can be found a Tactical Map originally manned by Cooper, a now dead HECU soldier, and used by Gordon Freeman to defeat the chasing Gargantua and clear the way ahead, leading to the ''Half-Life.html">Sector F.''Half-Life'' Another part of Waste Processing Area 3 connected to Sector E is seen in ''Opposing Force''. This is where the Pit Worm is found.


==Other notable features==

===Posters and other artwork===
*Several posters and ads are seen through ''Half-Life'' and its expansions. As seen in the texture files of both ''Half-Life'' and its released Alpha version, the facility was actually to feature many more of these posters and photos, most of which ended up unused due to copyright issues. 

*Several images are taken directly from the website http// Public Domain Images, existing as far as 1996http//*/http// Internet Archive Wayback Machine history for PD Images WikipediaBabe Ruth|Babe Ruth, a bald eagle, WikipediaThurgood Marshall|Thurgood Marshall, a carcinogen bound in a DNA double helix used for a calendar; the "WikipediaThe Blue Marble|Blue Marble" photograph of Earth used for another calendar.

What follows is every piece of artwork (mostly photos and posters) seen throughout ''Half-Life'' and its Expansions, as the original textures. Includes the images removed from the final game and the images present in the game files only.

FilePOSTER1.png|F-14 with Phoenix missiles.
FilePOSTER2.png|Two jet fighters.
FilePOSTER8.png|Thurgood Marshall.
FilePOSTER9 alpha.png|Atomic bombing of Nagasaki on August 9, 1945 (Alpha version only).
FilePOSTER9.png|A bald eagle.
FilePOSTER10 alpha.png|Jimi Hendrix (Alpha version only).
FilePOSTER10.png|A windsurfer.
FilePOSTER19 alpha.png|Albert Einstein (Alpha version only).
FilePOSTER19.png|Babe Ruth.
FilePOSTER16 alpha.png|Pin-up calendar (probably Bettie Page) (Alpha version only).
FilePOSTER16.png|Earth ("The Blue Marble") calendar.
FilePOSTER17 alpha.png|Coca-Cola Santa Claus calendar (Alpha version only).
FilePOSTER17.png|Computer generated image of a carcinogen bound in a DNA double helix calendar.

FilePICTURE1.png|Mike Harrington|Mike and Monica Harrington.
FilePICTURE2.png|Probably Jay Stelly and companion.
FilePICTURE3.png|Probably children of a Valve employee (Alpha version only).
FilePICTURE6.png|Valve's Ted Backman and companion Vanessa Slough.
FilePICTURE7 alpha.png|Probably a Valve employee (Alpha version only).
FileValve c. 1998 (PICTURE7).png|The ''Half-Life'' team around 1998 (apparently on a baseball field, with Gabe Newell sitting in the middle).
FilePICTURE8.png|The White House.
FilePICTURE9 alpha.png|Marilyn Monroe (cropped from original) (Alpha version only).
FilePICTURE9.png|Valve into the head of the "Open your mind" Mr. Valve.
FilePICTURE10.png|Probably WikipediaJ. Robert Oppenheimer|J. Robert Oppenheimer.
FilePICTURE11.png|WikipediaMartin Luther King, Jr.|Martin Luther King and WikipediaMalcolm X|Malcolm X shaking hands.
FilePICTURE12.png|Isabel Teasley, daughter Valve's Harry Teasley, presented in-universe as a relative of Gordon's.
FilePIC 01.png|Probably Gearbox employees.
FilePIC 02.png|Probably children of a Gearbox employee.
FilePIC 03.png|Probably a Gearbox employee, seen several times through the Gearbox expansions.
FileGORDON_01.png|"Employee of the Month" picture of Gordon Freeman.
FileLocker pic1.png|One of the two pictures from Barney Calhoun's locker.
FileLocker pic2.png|Ditto.
FilePic 02 2.png|Probably the child of a Gearbox employee.

FilePOSTER8 alpha.png|Bettie Page (Alpha version only).
FilePINUP01.png|Marilyn Monroe in ''The Seven Year Itch'' (Alpha version only).
FilePINUP02.png|Pamela Anderson (Alpha version only).
FilePINUP03.png|Farrah Fawcett (Alpha version only).
FilePINUP04.png|Marilyn Monroe (Alpha version only).
FilePINUP05.png|Lynda Carter as Wonder Woman from the 1970s TV series of the same name (Alpha version only).
FilePINUP07.png|Raquel Welch in ''One Million Years B.C.'' (originally with John Richardson on the left, but edited out in this version) (Alpha version only).
FilePINUP06.png|Lucy Lawless as Xena from the TV series ''''WikipediaXena Warrior Princess|Xena Warrior Princess''.

FileC1A0 FLIPSIGN1.png|Flip sign featuring the AH-64 Apache.
FileC1A0 FLIPSIGN2.png|Flip sign featuring the Sector G dam.
FileC1A0 FLIPSIGN3.png|Flip sign featuring the Loader.
FileC1A0 FLIPSIGN4.png|Flip sign featuring an early version of the Black Mesa security guard.
FileC1A0 FLIPSIGN5.png|Flip sign featuring the Black Mesa Transit System.
FileC1A0 FLIPSIGN6.png|Flip sign featuring scientists "working as a team".
FileC1A0 FLIPSIGN7.png|Flip sign featuring automated work made along the Sector C Line.
FileC1A0 FLIPSIGN8.png|Flip sign featuring the Black Mesa desert.
FileBa propaganda1.png|Ad featuring the security guard training range at Area 3 Medium Security Facilities in Sector C.
FileBa propaganda2.png|Ad featuring scientists shaking hands.
FileBa propaganda3.png|Ad featuring the Ionization Chambers from the Anomalous Materials.
FilePropaganda 01.png|Ad featuring "Gus" working along the Sector C Line.
FilePropaganda 02.png|Ad featuring a scientist in cleansuit in one of the Sterilization Chambers at the Alien Research Labs.
FileBm advert.jpg

===Vending machines===
FileVmachine02.png|The "Enjoy" soda vending machine introduced in ''Half-Life''.|right|thumb|100px

{{Main|Food story arc}}

The two different soda vending machines will deliver one can each time a button is pressed; each can gives one health point, serving as a makeshift Medkit when none is available. The facility also features snack vending machines, used only by the security guard and scientist NPCs.

==Behind the scenes==
FileRtb laidlaw note.jpg|200px|right|thumb|Marc Laidlaw's brainstorm note from ''Raising the Bar''.

*Series' writer Marc Laidlaw coined the name "Black Mesa Research Facility". He came up with several names during his brainstorming, apparently all based on actual locations. He states it is great fun for Valve to invent names for their creations, and then see them go out into the world and take on lives of their own. He also humorously states he is very glad he decided to go with "Black Mesa Research Facility" rather than "Black Butte",''Half-Life 2 Raising the Bar'' likely because of its similarity with the word "butt". These names, most of the time to be completed by the words "Research Facility", include 

*"Black Butte Nuclear Missile Base", located in Montana instead of New Mexico. 113 summits in the United States are named "WikipediaBlack Butte|Black Butte".

*"Sand Basin". A "http// Black Sand Basin" can be found in WikipediaYellowstone National Park|Yellowstone National Park).

*"Diablo Mesa" / "Mesa Diablo". The http// Mesa Diablo Summit can be found in New Mexico.

*"Diablo Plains". The "Canyon Diablo Plains" are part of the WikipediaCanyon Diablo (canyon)|Canyon Diablo, located in Arizona.

*"Fertile Plains". Does not seem to exist.

*As for the name "Black Mesa", several can be found across the United States

*An WikipediaBlack Mesa (Oklahoma)|actual mesa that covers the states of Colorado, New Mexico and Oklahoma, and that got its name from the layer of black lava rock that coated it about 30 million years ago.http// Black Mesa State Park & Nature Preserve on In Oklahoma, it is home to the http// Black Mesa State Park and the http// Black Mesa Nature Preserve. Black Mesa may be located there.

*The WikipediaBlack Mesa Test Range|Black Mesa Test Range, located in Utah, interestingly a rocket testing facility.

*WikipediaBlack Mesa, Arizona|Another Black Mesa can be found in Arizona.

*Ted Backman suggested Black Mesa areas that were not included in the final game, such as a large fuel depot stacked with barrels of oil that would have forced the player to use hand-to-hand combat instead of their weapons, with creatures coming from the opposite end of the room, and a morgue full of tanks containing dead alien specimens.

*According to Jay Stelly, all ''Half-Life'' maps were designed ahead of time on paper by a "Cabal" consisting of level builders, animators, programmers, and anyone else needed for their creation so the team ensured all the available technology was being used to its fullest potential throughout the game.

*''Half-Life Uplink'' features two instances of security cameras following the player, not seen in any other game set in Black Mesa. Shielded cameras were also suggested at some point in a "Detectomatic 2000" security checkpoint. This is featured in ''Opposing Force'', in the Santego Military Base.

*According to old ''Half-Life'' builds, the facility was also to feature a particle accelerator.

FileBlack mesa photo.png|right|thumb|The photo of a black mesa as seen on Kleiner's Lab cork board.

*As with Aperture Science, the Black Mesa Research Facility / Black Mesa logo is directly based on the company's name, appearing as a stylized WikipediaMesa|mesa mountain against the sky.

*The cork board hanged to the teleport room door in Kleiner's Lab features several schematics, newspaper clips, photos and sticky notes, among them the photography of a black mesa. This might be the mesa that gave its name to the facility.

*The Black Mesa Research Facility bears many similarities with real world scientific facilities such as the WikipediaLos Alamos National Laboratory|Los Alamos National Laboratory, the WikipediaArea 51|Area 51 or the WikipediaCERN|European Organization for Nuclear Research.


FileEarly Black Mesa Hall.jpg|Hall in unknown area.

===Concept art===

FileBmrf no smoking.jpg|Fuel depot.
FileBmrf tanks.jpg|Morgue.
FileBmrf secu check point.jpg|"Detectomatic 2000" security checkpoint.
FileBmrf catwalk.jpg|Catwalk.
FileBmrf launch key room.jpg
FileSilo concept.jpg
FileBmrf cooling tank.jpg
FileBmrf cryo room.jpg
FileOn a rail concept.jpg

==List of appearances==
*https// ''Half-Life'' 1997 Teaser {{1st}} {{Nc}}
*''Half-Life Day One''
*''Half-Life Uplink'' {{Nc}}
*''Half-Life Opposing Force''
*''Half-Life Blue Shift''
*''Half-Life Decay''
*''Half-Life 2'' {{Flash}} {{M}}
*''Half-Life 2 Raising the Bar''
*''Half-Life 2 Episode One'' {{Mo}}
*''Half-Life 2 Episode Two'' {{Flash}} {{M}}

{{Imagecat|Black Mesa Research Facility images}}

== External links ==
*http// Overview of Black Mesa – A composite map of the facility as seen in the original ''Half-Life''.
*http// A speculative 3D map of Black Mesa, including the expansions, with some gap-filling fanon

|title=''Half-Life'' story arc journey
|title=''Half-Life Blue Shift'' story arc journey
{{Black Mesa}}
CategoryBlack Mesa
CategoryBlack Mesa Research Facility locations
CategoryTed Backman designs
CategoryHalf-Life Opposing Force
CategoryHalf-Life Blue Shift
CategoryHalf-Life Decay
CategoryHalf-Life Uplink
CategoryHalf-Life 2 Raising the Bar