This also marked the cessation of development for the freeware version, though it remains available for download.įollowing seven years of development since the mod's first public release, four of which were spent in Steam Early Access, the final four single-player chapters constituting the events set in Xen were gradually made available for early beta-testing over the second half of 2019, with their full integration occurring on December 24th.
With Valve's blessing, a retail version of Black Mesa was made available on Steam in May 2015 as an Early Access title, which added advanced graphics technology and multiplayer. The game's first public release came in September 2012.
Black Mesa is a Fan Remake of Half-Life 1 by the Crowbar Collective (formerly known as the Black Mesa Development Team), beginning life as a total conversion mod for Half-Life 2 shortly after the latter's release in 2004.