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Valve-Xen-Black-Mesa-Deep-Blue-Free-Wallpaper.mp4(1683 downloads)Black Mesa (formerly known as Black Mesa: Source) is a first-person shooter video game, developed and published by Crowbar Collective. It is a third-party remake of Half-Life (1998) in the Source game engine. Originally published as a free mod in September 2012, the game was given approval by Valve (the developers of Half-Life) for a commercial release. The commercial version was first published as an early access title in May 2015 and had its full release in March 2020 for Microsoft Windows and Linux, with future plans for a macOS version.