

Original game speed, 2 = twice the original game speed, etc.

In the corner of this office is a cabinet with a door behind it. You can use a portal to get high above the Control Room and enter a small office. When Cave starts talking about testing on hobos, below one of the test spheres and a giant Aperture logo is a room marked "CONTROL ROOM" in yellow lettering. Then, play through the level until you reach the 1971-era test facility. Listen to the audio that plays when you hit the buttons in front of each of the sealed doors. On one end of the chasm is a platform with three of the Vitrified Doors. You must use the elevator shaft as a gravity boost to get across a chasm. The cheats only work in campaign, but make the game a breeze (and a lot of fun). After flying through the Aperture logo, you will come to an area with a tall elevator. What xbox 360 games can you use cheats on and still get achievements. At the beginning of Chapter 6, you will have to penetrate the 1960s Aperture facility. In Chapter 6: The Fall, there are six sealed metal doors marked "VITRIFIED" (Vitrified Doors) that have buttons in front of them that play unique audio clips of Cave speaking.
