I am just wondering two things. 
 
1. Is the game fully co-op? Can I play the story with 2 people the whole time, or is there a dedicated, separate co-op mode? 
2. If the game is fully co-op, can we both earn achievements, ala Fable 2? 
 
Thanks duders. Please don't call me out for being a non-searching noob.

I have a question as well. If one person is with survivors in tow and another person doesn't and then the person without survivors leaves the area while the other is still in the middle of an area do the survivors get left behind? What if both survivors are at 2 different doors and both have survivors. The one that activate the door is the only one that keeps his survivors?

As far as I know, it is fully co-op, but maybe one of our UK duders that are already playing the game can answer it.

I also have a question:  Is it split-screen?  (I'm guessing not :/)

i believe it's co op story, but the story progress only goes to the host.  
@xobballox: as far as i know, it isn't 

@xobballox: as far as i know, it isn't  "

Anyone know the answer to my questions?

" Anyone know the answer to my questions? "

For the main questions, The game isnt exactly fully coop. Basically the host gets the story progression, money, Combo cards and PP he gets when playing and the coop buddy only gets money, combo cards and PP he gets when playing, he doesn't get story progression. I have earned some acheivements when playing as the "Buddy" but I didn't get acheivements like returning 10 survivers. So i guess you only get a few, the host will get the acheivements.
 
As kinda explained, players have to be in the same area, to do that you both need to be near the door to be able to pass through, this forces cooperation otherwise you just wont be able to go anywhere. The survivers follow the last person that presses the Y button, but for them to go through doors they have to be within an area, theres a visual icon that pops up letting you know when they are close enough. However you can pass through the doors without them and leave them behind.
 
And no the game doesn't have Split screen.
 
Hope that helps.

Exactly the questions I had! Thanks for the info guys!

I have been playing the whole time Co-op, it's been done very well when compared to something like Fable II.
 

• The host and guest will get all trophies/achievements.
  
• If one player dies they go into a "down state" and the other player can revive them with food.
• You must be in the same area, but you aren't leashed to each other.
• You are both required to be at the same door before changing area.
• Survivors will follow whoever activates the mission (showing their Chuck in the cutscenes).
  
• Story progression is locked to the host, but guest can still witness it all.
• Guest can make weapons, earn PP, drive vehicles, start missions, lead survivors, wear different outfits.
• If the host disconnects, the guest is prompted to save.
• You will damage each other with most weapons.
• Guests own story isn't hurt in any way, they can return to it with all the PP/combos/outfits they earn in co-op, but you do lose equipped weapons.
  

" @OtakuGamer:  That's true, but the only major reason kill counts matter are for the 500 / 5000 / 53,000 / 72,000 trophies. And you are really only going to hit 500 in a normal playthrough, to hit the others you're going to need a dedicated playthrough just for killing.  But you will miss out on the bonus PP for missing a killing milestone, so yeah would be nice if it was changed to fix that. "