Well, the fifth installment did come out after the third. And I can't bring myself to call it an add-on. As for the seventh part, I won't pass judgment, as I haven't played it myself, although I have seen quite a few reviews, let's plays, and other things. The only thing I can say is that the project is still very raw, and a lot needs to be fixed, balanced, and reworked. If the developers can find the strength and desire, perhaps the game will take off.