Black Mesa - Blue Shift Chapter 03 (Duty Calls)

After the cataclysmic events of the Resonance Cascade, Barney awakens from the elevator crash deep in the bowels of Sector G. He soon discovers that the entire facility has been rocked by interdimensional portal storms, which have brought in hostile and terrifying alien creatures. Making his way through the remnants of the facility, he is told by his surviving colleagues that the only way to safety is through the canals. Armed with nothing but his flashlight and sidearm, Calhoun sets out on his perilous journey to escape Black Mesa.