Check out this event.
I know the website says 2013 but its the correct link to the 2014 info.
Join up and fight for Rick or The Governor to push back the walkers and do what it takes to survive/win! Special Missions, Tanks, and waves of walkers will make this event pretty intense.
Pre-register is open now.
Each square is an Acre... so this is a huge map! (full size map can be found on the linked website)