* In the novel A Big Boy did it and Ran Away by Christopher Brookmyre, the author makes frequent references to various video games including Half-Life; the main action takes place in a largely underground hydroelectric power station with the Scots Gaelic name "Dubh Ardrain" which can be translated as "Black Mesa" (dubh - black,[9] ardrain - high part[10]). At one point the male protagonist is equipped with a crowbar, one of the antagonists takes the alias of "Gordon Freeman" and an SAS soldier called "Adrian Shephard" is a minor character.
* In Call of Duty: United Offensive, near the start of the second mission, two American soldiers are shown running side-by-side. On the left, Pvt. Gordon, and on the right, Pvt. Freeman.
* In Dead Space (video game), if the player finds the text log of reported dead miners near the captain's seat, the name G. Freeman is on the list.
* In Destroy All Humans!, one of the scientists says "I mustn't be late, They're waiting for me in the test chamber", but then quickly corrects himself "Oh, wait, wrong game." Also later on in one mission where you must capture a majestic agent the mission briefing says "to capture a g-man and take him to your ship"
* In Destroy All Humans! 2, if the player reads the mind of a Russian man in Tunguska, he will make a comment about how the city of Tunguska is being renamed as City 17.
* In Far Cry Instincts, before the second Fat Boy fight in a near by shack there is a game magazine with a parody reference.
* In The Punisher, a scientist refers to another scientist as "Doctor Freeman" and asks what a noise he heard was, to which Doctor Freeman replies "maybe the quantum physics department finally opened that extradimensional portal!". The reply is "Extradimensional aliens! Wonder what they look like?", a reference to the opening scene of Half-Life.
* In The Simpsons Game while in the Game Engine level, in the level choosing area, there is a game poster that says Zero Life. Professor Frink replaces Gordon Freeman on the cover.
* In S.T.A.L.K.E.R.: Shadow of Chernobyl, the player may find inside a tunnel located in the Wild Territory a body marked "Freeman". When it is searched, Gordon's Personal Digital Assistant is found, it is learned Gordon hates his bosses and had to trade his crowbar for a can of meat.
* In TimeSplitters Future Perfect, during the level "You Genius, U-Genix", Cortez, the protagonist of the story, changes into a lab coat along with a name tag that reads "Dr. Freeman" and is told that his name is Gordon.
* In TimeSplitters 2, one of the "Challenge" Missions, Half-Death, has a plot that refers to the Black Mesa incident.
* Hardcore Techno/Gabber music producer DJ Hellfish, has a track called "Non-Standard Procedure" which samples some of the voices from the start of the first Half-Life game.
* In 1998 video game SiN, in the secret level Military Base a rusty plate with Black Mesa inscription can be found under the flag pole, which may indirectly refer to the competition of these two games.
* In Andy McDermotts novel "The Tomb Of Hercules" while Eddie Chase has infiltrated the underwater base, two men come in, one is unarmed and the is referenced as having thick, black glasses and he is wielding a crowbar. He is also called Gordon by the unarmed man.
Games referencing crowbar
* In Grand Theft Auto: San Andreas, a crowbar can be found in one of the research labs in the underground military base, Area 69, which slightly resembles Black Mesa.
* In The Ship, a game developed using the same game engine as Half-Life 2, the weapon description for the crowbar states it is suitable for any "free man".
* In Penumbra: Overture, the player finds a journal of a lost miner, whose friend's first name is Gordon. He is said to be using some kind of new suit for hazardous areas (as this place is a frozen lake, underground). Later, the player finds a hand sticking out of this frozen lake, grasping a red, rusted crowbar.
* In Splinter Cell: Chaos Theory, during the 'Battery' mission, the protagonist Sam Fisher says that he forgot to bring a crowbar to open the missile control casing, to which Anna Grimsdottir comments that "crowbars are for geeky video-game characters".
