Pick up the crowbar of research scientist Gordon Freeman, who finds himself on an alien-infested Earth being picked to the bone, its resources depleted, its populace dwindling. Freeman is thrust into the unenviable role of rescuing the world from the wrong he unleashed back at Black Mesa. And a lot of people, people he cares about, are counting on him.
The demo includes only one chapter. Vertigo was created by Valve and map fixing by H-Grunt.
When I start up the game it said it couldn't find background image
materials/console/startup_loading.vtf
try porting it into missing info mod