I just finished all the mission shops that are listed on the WIKI, and the only one I haven't completed is the Harbour Master Navy Quest because it says there are no missions available.

I've completed:
College Campus,
Mercy Hospital,
Religious Cult,
Baseball Statdium (militia),
Winchester Pub,
Abbey Road safehouse,
Grindes House,
Junk Yard,
and Autumn Leaves HQ.

What's left? What else is there to do because this game is awesome and I would hate for there to be nothing left except scaveging and getting better weapons to kill zombies.. I mean I love killing zombies but still lol.

This is because the game is under development...

Looking forward to more missions. I found map exploration more efficient when I am doing it as part of missions. Otherwise it is just blindly groping around in the hope of finding a decent place. After all not all the "interesting" places marked are in fact interesting,

I'll agree, KoC. Quests add purpose and shape to the game, just as the narrative impulse helps us make sense of life in the real world. Problem is, its not as easy as it looks, adding quests and tangental story lines to the game. Lets assume for a moment that the devs have a few ideas, some pretty well worked out, some still in formative stages. They get one or two or three suggestions from beta testers with bright ideas. They not only have to complete working on their own ideas, but look at other people's, and judge which ideas are so much horse-feathers, which are interesting, and which are F'n brilliant. then they have to take those and compare them to their own and judge which are more or less duplicate missions, which are interesting tangents worth exploring, and which are basically mutually exclusive. And of course the dev who spends all week working out the briliant plot-twist in story-line A doesn't find out until Friday that another dev has got another brilliant story line worked out that entirely contradicts the first.
I do this for a living. It gets middle-aged fast.

I totally agree opening the opened door prolongs things greatly and if only one person of the dev team takes care of quests that does not mean that the others are less creative and here we have the vicious circle as late for dinner said.

I know! Maybe some sort of daily quests, and things like that, that would reveal storyline and things like that; like getting supplies to some HQs, sending messages from different survivors camps, and things like that. I know they aren't as cool as long and epic quests, but when you are really doing things randomly, it could help.