Cemetery

Cemetary is a large open map and it's unlocked after the player completes institute. However, it must first be downloaded before being played.

Difficulty/Strategy
The map is somewhere in between the difficulty of zomb-o-mart and the Black Isle the only difference is that players have more room to defend rather then being confined to cramped entryways like institute. The center of the map is the easiest defend so long as they have the ammo to hold it off otherwise the pathways might be defensible enough against shadows but not burrowers.