Developer Commentary without Completing the Chamber

I've played (and finished) the original Portal on my Xbox 360. I really liked the game, and thought many times about having another go to listen to the developer commentary. However, I do not fancy another play-through using that wicked game-pad contraption.

Recently I picked up the PC version on steam. To my utter chagrin, it requires me to finish a chamber before being able to access the commentary. This would mean two entire play-throughs, which is a bit much even using keyboard and mouse.

Is there some way to convince the game that I've played it already and let me listen to the commentary unhindered?


  1. Finish the first level.
  2. Return to the main menu.
  3. Start over in developer commentary mode.

You should now be able to finish the entire game with developer commentary on. (You are however giving up on achievements.)