As announced earlier this month, the first part of fan-made Half Life remake Black Mesa is available for free starting today. The game can be downloaded through Black Mesa’s official site and allows players to play through the game up to Lambda Core. Black Mesa is a total conversion of Half-Life 2, rebuilding Half-Life from the ground up in Source.
The game can be played by anyone who downloads Valve’s free Source SDK, and a full list of system requirements is available on Black Mesa’s site. Black Mesa will also be distributed via Steam in the future as part of Valve’s Steam Greenlight program.
Source: IGN