Do you remember Portal, the fantastic shooter puzzle game from Valve where you had to escape from a psychotic robot? It turns out that Valve remembers about it, too, and even updated the PC version of the game this week completely unexpectedly. Their release notes said,
Changed radio transmission frequency to comply with federal and state spectrum management regulations.
Immediately we got excited and knew something was up with the radios. In digging into the audio files for the game, it was discovered that there were a number of new MP3 files all related to the radio. The new files include several Morse Code transmissions and the rest are SSTV encoded photos. The images all appear to be photos from inside Aperture Laboratories, possibly from the security cameras. There is definitely a lot of thought behind what is going on here.
The guess has been that all of these new challenges are leading up to a Portal 2 which Valve then announced officially. The official description of the game says,