At 14:33 pacific standard time Valve released an update for it’s most popular puzzle game; Portal. The company’s description of the update was only this:

Changed radio transmission frequency to comply with federal and state spectrum management regulations

What this translates to is that there are now 26 radios spread throughout each level of the game, the new achievement involves finding each one and activating them.

SPOILER ALERT (sort of): Each radio will play an Easter egg audio file when activated. So far files that have been found by the community include messages inmorse code, hexadecimal, and images encoded into audio files.

Details about the update are still being discovered by the community, a comprehensive collection of the findings will be posted when it looks like everything has been found. Until then, you can monitor the community’s progress on the Steam forums.

Update Discovery Thread

Morse Code Thread

Decoded Images Thread