As far as I can tell, no one really knows about this yet. OK, in the test chamber where you get your Weighted Companion Cube
TM, there's a section of wall before you get to where you incinerate your companion cube, which is just barely pushed out, so you can see inside, but can't walk into it. Create a portal inside of this area, and in any wall near you to get inside. In there you'll find all kinds of creepy and disturbing pictures of women with pictures of companion cubes covering their faces. Anyway, at the bottom of this little odd thing is scrawled:
"Username: cjohnson
Password: tier3"
So I got an idea. I went to the Portal viral marketing website,
www.aperturescience.com, and used that login info. I read a very interesting story.
Enjoy!