The legacy release of Black Mesa is currently available free for download. The final release is under active development and available via Steam under Early Access.

Prepare for an experience that you will find nostalgic, exciting and fresh. Black Mesa (formerly Black Mesa: Source) is a re-envisioning of Valve Software's seminal game Half-Life. You will re-visit the inaugural role of Gordon Freeman and his memorable journey through the Black Mesa Research Facility. Learn more.