Black Mesa Released

Re-visit the world that started the Half-Life continuum
Black Mesa (formerly Black Mesa: Source) is a Half-Life 2 total conversion remaking Valve Software's PC game, Half-Life. Utilizing the Source engine, Black Mesa reintroduces the player as Doctor Gordon Freeman, along with the original cast of memorable characters and environments seen in Half-Life.
Black Mesa was founded to fully reconstruct the Half-Life universe utilizing Source to its fullest potential in terms of art detail, level sizes and code features. This total conversion does not require Half-Life: Source to play - only a copy of any Source Engine game installed on Steam.