Wallpaper-sized screencap of the blue screen of death.
The overgrown potato science project has Chell's name on it.
I certainly didn't notice this - - but apparently, when you look at the art at the beginning of the game, there's no moon. The second time you see it, there's a prominent moon.
A high-res screencap of P-Nut's appearance in the single player campaign.
High-res screencap of Wheatley.
Valve added several new Portal t-shirts and posters to their store, including three turret moon.
You can see all the other Portal links I've posted here.
