State of Decay

This achievement is relatively simple, when you have gotten a "base" you can have outposts and to do that you need to go into a building you would like to have as an outpost and search everything in it and clear out all of the zombies. Then press down on the d-pad to see available options. Scroll down to establish an outpost and bam theres one. Now how many you can have are relative to thee size of your "base" and for me to have 8 i had to find a base that i needed a minimum requirement of:
12 people and 50 supplies of wood.
Then i just placed outposts till i had eight, but i made them close to my base so it couldnt get overrun.
Tips: if you need more survivors or supplies go to your base map layout and scroll to the radio tower and press A and choose either offer shelter to survivors or Ask about material caches


Note: You need 100 influence to relocate your base so try to scavenge supplies and do missions to gain more influence

This achievement is done by constructing 8 Outposts.

The best and most simple way to do this is to wait for the mission: ''Home Away from Home'' With Lily's brother Jacob. Now the thing is there's only one suitable location to do this and it is in the town of Marshall. The location is named Snyder Trucking Warehouse. Here's a pic of it:



and location:




How to: Start the mission with Jacob, drive out to Marshall with him , you should already have a way point set-up on your map (BACK button), it will lead you to a potential home site, where Jacob will praise the benefits of a tree-fort and talk about his friend Sandy who lived there. Once all is done get back in your car and drive up the street (opposite to the bridge), it will lead you straight to Snyder Trucking Warehouse. Visit the site for it to register on your map as a potential site. Now you need at least 12 survivors and 50 Materials to move your home to this location, it also requires you to have 100 FAME. To help achieve this you can use Lily from the HOME Menu, and ask her to locate materials and survivors. For the fame simply scavenging and delivering things to your home should bring you well enough fame to move away.
Once you have all you need get to the Warehouse and press down on your D-pad and choose the option: Relocate Home.

Once you have relocated, completely search a location and once you cleared it, press down on the D-Pad and choose set-up Outpost. Then repeat 7 more time for a total of 8 outposts. Also remember that 50 FAME is required for each outposts.

Just build outposts, you can build 6 but then your limit has reached.
You need a bigger Home to build 8 outposts.
I moved to the Fairgrounds and built 2 more outpots and unlocked the achievement.
The Fairdgrounds are in the up north part of the map, the location will be unlocked
when doing business with the army.