Portal Easter Eggs
Easter Egg in the Companion Block Level
In the level in which you have to use the "companion block" (with the hearts on it), one of the walls is sticking out, and behind it is a secret area with writing and posters on the walls. Beneath the photos of people with the block's picture pasted on their heads there is a username and password scribbled on the wall. It reads:
User: cjohnson
Pass: tier3
Go to http://www.aperturelabratories.com/ and type "Login." Then enter the username and password. Once you've done that, you can enter the following commands:
THECAKEISALIE
DIR/CATALOG/DIRECTORY/LIST/LS/CAT
IP
HELP/LIB
LOGOUT/BYE/LOGOFF/VALVE
APPEND/ATTRIB/COPY/FORMAT/ERASE/RENAME
INTERROGATE
TAPEDISK
APPLY/APPLY.EXE