Cybus FM was a radio broadcasting service owned by Cybus Industries in Pete's World.
There was an advertisement for Cybus FM on the Cybus Fitness website which encouraged individuals to "get on the right wavelength" by listening to the broadcast while exercising. Cybus FM could be listened to primarily by those with Cybus EarPods, though standard radios were also capable of picking up the frequency.
Listening to Cybus FM was described as one of the "reasons to be cheerful". The website also contained the number 657. The readers of Defending the Earth! used this advert, guided by "ChatGuest1", to look for the aforementioned number for that day's "special frequency or wavelength". Upon tuning their radio to Cybus FM, they would receive a broadcast telling them about Henrik's Surprise. (GAME: Cybus Spy [+]Loading...["Cybus Spy (video game)"])