Health-Less (Half-Life VHS/Parody) 

The video is based on how I see the general atmosphere of Half-Life.
Like imagine, you were in the epicenter of events after which the whole country is evacuated, you were left to die in the depths of this complex in the walls of which horror is happening, extraterrestrial beings have killed most of your colleagues, the corridors you have known now are filled with blood and mountains of corpses, the military has been ordered to kill you, and all you have to do is try to survive as long as possible and there is almost no hope left.
And just remember, that "every action has consequences".