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During every month, a number of territories get infected and I get to pick which one to rescue.

At times however it seems there's very little to base this choice on. For example, right now I can choose between seven territories, all with a population of 125, all with a difficulty of 1, all rewarding mercenaries.

Is contiguity something I want to worry about? For example, right now two newly infected territories are contiguous with areas I own. I'm worried that might be bad news for those areas.

So many zombies, so little time.

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up vote 4 down vote accepted

Eventually Zed territories will appear at level 4. There are NO survivors to rescue here, instead you must destroy all Zed before a time limit runs out. If you do not take care of these zones, then nearby Zed territories will have their level grow at the end of each turn (1→2, 2→3, 3→4). Left unchecked, this can lead to many zones being level 4, with no survivors for you to rescue, and each level 4 zone able to make the surrounding zones even harder.

You do eventually unlock something to help deal with the level 4 zones called the Llama Bomb. Just don't try to go in and clean it out at your first chance, because you just aren't powerful enough to deal with it at the time (at least I wasn't).

Here is an image I found showing what the Llama Bomb looks like when you use it in game. The green zones are the territories that the Llama Bomb will affect.

Llama Bomb

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Wish you'd answered earlier on, because I wasted two months on level 4 zones. I hope the weapon isn't the one that recharges on kills and rescues, because I already have it. – badp Aug 11 '11 at 16:02
No, this is a weapon you use on the map, it has a small radius and removes all Zed infestation in the zones it hits. You get 2 charges (or at least I did) and should get it when your survivor count is at the second or third checkpoint I believe. – Crag Aug 11 '11 at 16:19
It's called the Llama Bomb. – Suyooo Aug 11 '11 at 17:26
@badp Just to add a bit of clarification, the weapon that charges on kills and rescues is called the Catbird Cannon. – Brysonic Jan 23 '12 at 16:19

A red zone level 4 adds +1 infestation to each uncleaned neighbor area once, but this can trigger a chain reaction. If you are not getting ready from your first turn you end up with completely red map by the 10th turn.

So you should choose the next area to clean based on:

  1. How many uncleaned neighbor areas it has
  2. How well it cuts the map, e.g. area in the middle of the map is better than an area close to the border of the map
  3. Urgency, if there is a 4 level area spreading zombie to many neighbors it should be cleaned asap
  4. Area's bonuses

In your example the best zones to choose are the one which is selected and the one in the left down corner.

You can forget about clean areas they do not participate in the game except for giving you points if they are 100% disinfected.

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