Let the rumour mill begin! With the Left 4 Dead demo now out there was a small easter egg uncovered. It seems that there’s some TF2 stuff in the game and someone with too much time on their hands has deciphered that the information displays 10 TF2 classes. That’d mean that Valve has another one coming sometime soon. Once the full game is released we may find out more but for now think of this as a rumour as adding another class could begin to unravel the already unstable balancing act of the 9 classes.