Half-Life is a first-person shooter video game in the genre of science fiction. The game was developed by Valve L.L.C. and published by Sierra Studios. This game got a great number of "Game of the Year" awards and is often referred as one of the best video games of all time.
The actions of the game take place at the Black Mesa Research Facility in New Mexico. A player is offered to play the role of Dr. Gordon Freeman. After a teleportation experiment fails, aliens, called Xen, start to enter the facility. The protagonist needs to find a way out of the secret laboratory, solving various puzzles and taking part in battles.
The game isn't divided into levels or missions, but has chapters. The story is told with the help of scripted sequences, allowing a player to control the protagonist from the first-person viewpoint. A player doesn't see the character and perceives all the game through his eyes. The level of the character's viability is determined by the health indicator and the level of the HEV suit charge. The both indicators can be improved in several ways, for example, by gathering batteries and aid kits.
A player gets through the game alone in the majority of cases, but sometimes is helped by non-player characters such as scientists or guards. Throughout the game, a character faces various human enemies and parasites of Xen like headcrabs, bullsquids, headcrab zombies and Vortigaunts. The main weapon of the Half-Life protagonist is the crowbar, but he is also able to use a number of other kinds of arms like the Glock 17 pistol, Franchi SPAS-12 shotgun, MP5 submachine gun, Colt Python, 357 Magnum revolver and rocket launcher as well as genetically engineered weapons.