is a fan-made, Valve-approved reimagining of the original Half-Life (1998). Developed by Crowbar Collective , the project spanned over 16 years of development before reaching its full 1.0 release in March 2020. Official Links and Sources Official Website : Crowbar Collective - Black Mesa Steam Store Page : Black Mesa on Steam
: As of April 2026, the game is officially supported in Garry's Mod, allowing players to mount its assets for sandbox play. Black Mesa :: Fear Not The Long Road - Steam Community black-mesa-game-link
: Unlike the original, the Xen chapters were significantly expanded and transformed into a sprawling, visually stunning alien world. is a fan-made, Valve-approved reimagining of the original