The recent patch released on 2 March (Singapore time) for Portal has added a mystifying “Changed radio transmission frequency to comply with federal and state spectrum management regulations” update.
An undescribed new Portal achievement, called “Transmission Received”, was also added.
-Portal gets surprise update yesterday afternoon
-People see new mystery achievement
-People play and see the radio in the beginning room now has a green light
-Carry it around and notice it makes strange broadcast interference noises in certain places
-Locate and place all 26 of these mystery radios for achievement
-Smart people yank wav files out of game content folders and run them through steganography programs
-Produces 26 weird cryptic image files in a numbered sequence
-Some dude runs the number string through an md5 hash translator and gets a landline number
-Internet traces it to Kirkland, WA (near Valve HQ)
-People find out its not a phone/fax line but a data line hosting a BBS and telnet it
-Use a clue from one of the files to figure out the BBS user/password login info
-End up with a bunch of weird ASCII artwork
-A collection of the ASCII artwork is posted: http://img341.imageshack.us/img341/6278/portalascii.png
-People get to work on the ASCII and an ingame screenshot may very well have been found by turning one of the ASCII artworks: http://cdupload.com/files/123623_btxvo/rotate1.jpg
-Speculation on another ASCII image, showing 2 robot like creatures starts.
Some believe they are connected, whilest other dispute it, claiming it shows the skeleton of a chicken and therefor they are not connected.
Others speculate that this may be Combine Super Soldiers. (http://half-life.wikia.com/wiki/File:Super_soldier.jpg and http://half-life.wikia.com/wiki/File…er_Soldier.jpg)
-Another new collection of ASCII is posted here: http://img63.imageshack.us/img63/930…sciilarge2.png and a blurred version is posted here: http://img189.imageshack.us/img189/9…ortalascii.png
RPS has written their own commentary about what all these ARG revelations actually mean. The most popular theory now, is that it hails the impending arrival of a Portal 2 sequel. Or possibly, Half-life 2: Episode 3.