Relive Half-Life in this highly acclaimed, fan-made recreation.

Main Info
Black Mesa is the award winning fan-made re-imagining of Gordon Freeman's landmark journey through the Black Mesa Research Facility. Relive Half-Life, Valve Software's revolutionary debut, and experience the game that raised the bar for the entire game industry all over again!

Key Features
Nostalgia has never felt so fresh - Expect tremendously detailed environments, old-school tough-as-nails combat, and a gripping story with memorable characters. The all-new soundtrack, voice acting, choreography and dialogue create a more expansive and immersive experience than ever before!

Heavily updated single player experience - The over 10 hour single player experience has greatly improved from the mod release; new visuals, new voice over, updated gameplay encounters, stability changes and more. Xen is not part of the Early Access release, but will included as a free update when it is ready.


Black Mesa Multiplayer - Fight with or against your friends, in two game modes across 10 iconic maps from the Half-Life universe including Bounce, Gasworks, Stalkyard, Undertow and Crossfire!

Custom Modding Tools & Workshop - Use the same tools as the developers! Create your own mods, modes and maps for Black Mesa and Black Mesa Multiplayer and then share your work, and subscribe to others, on the Steam Workshop!

Complete Steam Integration - Collect the full set of trading cards, backgrounds, emoticons, and achievements! Steam Cloud, Steam Workshop and partial controller support!

Run. Think. Shoot. Source..

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On May 15, 2016, version 0.3.0 was released, dubbed "The Surface Tension Update". The update integrates a popular mod, Surface Tension Uncut, into the game (the mod's developer, TextFAMGUY1, had previously been added to the development team). The new content adds about an hour of gameplay to the game. The update also adds high definition shadows (using Cascaded Shadow Maps), faster map load times, and translation support for 5 additional languages. As with previous updates, 0.3.0 additionally contains game balance and level design changes across singleplayer and multiplayer, as well as programming bug fixes. Notably the game's Artificial Intelligence was modified in singleplayer.

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Install and play.