THIS IS NOT WAREZ. THIS IS A LEGAL ALPHA RELEASE
Black Mesa (formerly Black Mesa: Source) is a Half-Life 2 total conversion remaking VALVe Software's award-winning PC game, Half-Life. Utilizing the Source engine, Black Mesa will reintroduce the player as Doctor Gordon Freeman, along with the original cast of memorable characters and environments seen in Half-Life. Black Mesa was built and founded on the basis that Half-Life: Source was inadequate as the Source engine port of Half-Life, regardless of the intentions of VALVe Software. As such, 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 will not require Half-Life: Source to play - only legitimate copies of Half-Life 2 and Counter-Strike: Source on Steam.
Offical Web Site:
In order to play this game you need Half life 2 Episode 1 Or 2.
Extract The Files To Your Root Folder Of Half Life 2.
Example (Steam Users
X:\Steam\steamapps\account name\half-life 2 episode one
To Run The Game,Launch The BMS File There.
If You Run Half Life 2 Episode 1 Or 2 Via Steam,STEAM MUST BE RUNNING IN ORDER TO PLAY BLACK MESA SOURCE
A guy said if you put it in "X:\Steam\steamapps\SourceMods\BMS" it works better.