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Run. Think. Shoot. Live.
Half-Life tagline[src]

Half-Life, stylized as: H λ L F - L I F E™., is a Science fiction-Like first-person shooter developed by Valve Corporation and published by Sierra Entertainment. It was first released by Sierra Studios on November 19, 1998.

The player takes the perspective of scientist Gordon Freeman, the main protagonist of Half-Life. Designed for Microsoft Windows, the game uses a heavily modified version of the Quake engine, called GoldSrc.

There are several mods based on Half-Life, Such as Counter-Strike, Team Fortress: Classic, and They Hunger. Although Counter-Strike later became a stand-alone game on steam and more, the Counter-Strike GoldSrc games require Half-Life files and automatically downloads them during installation. If the Half-Life game assets are not installed, certain maps will not load correctly.

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