In Piero's office, there's a readable note that talks about his "Door to Nowhere" invention.

Near the stairs, there's a doorway with a symbol on it that looks suspiciously like the Portal logo.

Portal Logo

Is this important to the game, an easter egg, or just a coincidence?

  • Pretty sure it's just an easter egg, but I could see it used as the access point for some future DLC (fingers crossed) as well.
    – user6789
    Oct 20 '12 at 23:28

Acheivement Hunter called it an Easter Egg, so I guess there is nothing more to this than what is shown in this video.

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