Black Mesa: Blue Shift. Chapter 01 (Living Quarters Outbound)

The time is 8:42a.m. Security officer Barney Calhoun boards a tram from the Topside Dormitories to begin a seemingly routine shift at the Black Mesa Research Facility, deep in the heart of the New Mexico Desert. Various unexpected system malfunctions cause delays in his ride, but Calhoun eventually makes it to his workplace at Sector C, where the science personnel seem anxious to start a highly anticipated experiment.

You can download this game in the link below :
ModDB page: https://www.moddb.com/mods/black-mesa-blue-shift-remake