An experiment at Black Mesa Research Facility causes an alien invasion on Earth. Theoretical Physicist Gordon Freeman, 27, embarks on a perilous journey through the facilities, seeking a way to halt the catastrophe and save the world.
An experiment in Black Mesa Research Facility goes wrong causing an alien invasion in Earth. Gordon Freeman, an 27 years old Theoretical Physicist, will start an dangerous journey through all the facilities to find a way to stop the disaster and save the world.
