This will anger the Narrator, and he will reference several game features when asking what exactly he wanted from the game. You will walk into a large room that the Narrator had not finished building yet Source textures (orange tiles) can be seen along the walls around you. At the two colored doors, take the blue door 3 times. Go into the warehouse, take the lift and jump onto the catwalk. At the 2 doors, pick the one on the right.