Step into the boots of Barney Calhoun as chaos erupts deep inside Black Mesa. What began as an ordinary shift beneath the surface transforms rapidly into a full-scale nightmare: alien incursions, military cover-ups, and a race for survival. Navigate hazardous research corridors, industrial waste zones and collapsed transit shafts.
One moment you’re performing routine duties; the next you’re fighting for your life against creatures from another world and soldiers sworn to silence everything.
SCREENSHOTS
Guard Duty is a reimagining of the classic Half-Life: Blue Shift experience, rebuilt from the ground up with the source engine and with respect for the original series.
Explore the depths of Black Mesa — from the quiet security offices and transit systems to the devastated labs and industrial sectors. Face off against hostile creatures, uncover hidden details about the disaster, and fight your way through the aftermath of a scientific experiment gone wrong.
You’re not a hero. You’re not a scientist. You’re just doing your job — until the world collapses around you.
Welcome to Guard Duty