Audio commentary

Activating a special options through the options gives you the ability to hear a in-game commentary spoken by Gabe Newell, managing director at Valve Corporation. He talks about all the behind-the-scenes in the game.

Stress Test

Remember not to play the Stress Test placed on the main menu before having finished the entire game! It spoils the whole passages and sections in few minutes.

Contributed by Niccolò Mineo (322) on Nov 24, 2006. [revised by : Patrick Bregger (210512)]. -- edit trivia