Think Left 4 Dead 2 is an expansion? You're an idiot.

[Torillian]

salaminizer said:

has any reviewer called it L4D 1.5?

Gametrailers didn't explicitly say that, but the reviewer did mention that he thought there should have been more for a full sequel and it felt more like the game was just fixing the problems from the first than adding on to the series.  Not sure if that counts though.