Half-Life is one of the most popular first-person shooters in the history of video games. Unlike other similar games of its time, Half-Life did not use any narrative cutscenes. Instead, the game is divided into chapters.
Most of the game takes place in a remote desert area of Mexico, at the Black Mesa Research Laboratory. This is a fictional complex that resembles both the Los Alamos National Laboratory and Area 51. The time setting is somewhere between 2000 and 2009. The game's hero, Gordon Freeman, a graduate of the Massachusetts Institute of Technology, survives a disastrous experiment at Black Mesa. As a result of the scientists' actions, the fabric of reality was breached, and parasites from another dimension invaded our reality.
As Freeman attempts to escape from the partially destroyed building, helping the wounded along the way, he finds himself trapped between the parasites and a special forces team called in to clean up the site of the failed experiment, including all parasites, as well as any surviving humans. Throughout the game, a mysterious man known only as the 'G-Man' periodically appears and watches the protagonist. Freeman, with the help of other survivors, reaches the Lambda secret laboratory (marked with the Greek letter 'λ'), where he is teleported into the world of these parasites. His task is to kill a creature called Nihilanth, which keeps the passage to our world open from the other side of the rift.
Most of the time, the player progresses through the game alone, but sometimes they are aided by game bots, especially security officers and scientists who are on his side. The hero faces a whole array of various creatures with bizarre names: headcrab, zombie headcrab, bullsquid, and vortigaunts. Additionally, our hero has to fight against humans: soldiers from the special forces team and black assassins.