The inability to escape the mindset that the popular music game Guitar Hero or other such music games creates. Sufferers of Hero-Syndrome will find it impossible to listen to songs not included in the game without imagining them being in the game, playing along with a phantom guitar controller or in more extreme cases dreaming about songs accompanied by scrolling frets and chords.
"Dude, what are you doing?!? Why are you playing air guitar to the Neighbours theme tune?"
"I don't know man, I can't help it! I think I have Hero-Syndrome"